Artigos - Zoologia - IBB

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Foram os Bivalves do Grupo Passa Dois (Exclusive Formação Rio do Rasto), Neopermiano, Invertebrados Tipicamente Dulcícolas?
(2002-01-01) Ghilardi, Renato Pirani; Simões, Marcello Guimarães [UNESP]; Universidade de São Paulo (USP); Universidade Estadual Paulista (UNESP)
During the Late Permian Paraná Basin was a huge epeiric sea in which salinity deviated from either normal marine or freshwater, particularly in marginally environments. Sedimentological, geochemical, petrographic data and associated micro-and microflora have been used to identify such variations. Although shell morphology (paleoautoecology) and preservation (taphonomy) of bivalve mollusks could be used as an additional tool, these have been fully neglected. Previous authors based on the occurrence of charophyte oogonia in rocks of the Terezina/Corumbataí Formations (Passa Dois Group) and coeval occurrences outside the Brazilian portion of the basin, interpreted the fauna (Pinzonella illusa and Pinzonella neotropica assemblages) as typically freshwater. However, morphologic and taphonomic evidences do not corroborate this assumption: a-assimetrical sculptures and radial ornamentation found in shells of the genera Cowperesia and Ferrazia are absent in freshwater bivalve shells; b-anteriorly expanded shells (e.g., Runnegariella fragilis) are not present in mollusks that colonized freshwater environments, and c-lunule (e.g., Pinzonella, Itatamba, and Plesiocyprinella) is rare or absent in freshwater bivalves. Additionally, typical morphological features (e.g., claustrun, tubercles, shell torsion) exhibited by freshwater bivalves were not observed in the studied fauna. Assemblages including high proportion of shells with extensive solution pits concentrated in the umbonal region are common in bivalves that suffered prolonged exposures to freshwater conditions. These features have never been observed in the studied fossil record. Our data highly suggest that the reconstruction of Passa Dois Group paleosalinity must be done using a “myriad” of stratigraphic, sedimentologic, paleobiologic and taphonomic information. At this moment, we can only affirm that they were not typical freshwater mollusks. Probably, they lived in shallow water habitats, frequently affected by storms, and punctuated by episodes of intense evaporation and hypersalinity with influence of local freshwater inputs, configuring an situation of high environmental stress.
Changes in algal communities in different habitats and environmental variables during an atypical drought period in a marginal lake to a river
(2023-04-01) Ferragut, Carla; Casartelli, Mayara Ribeiro; dos Santos, Thiago Rodrigues; Henry, Raoul [UNESP]; Instituto de Pesquisas Ambientais; Universidade Federal do Amazonas; Universidade Estadual Paulista (UNESP)
Climate change is changing the duration and intensity of dry and rainy periods, influencing the dynamics of algal communities in freshwater ecosystems. We evaluated the phytoplankton, metaphyton, epipelon, and epiphyton chlorophyll-a in a shallow marginal lake during a prolonged drought with a loss of river–lake connectivity in an artificial wetland system. We relate algal chlorophyll-a changes in different habitats to environmental conditions during the gradual lake volume reduction. Water and algal community samplings were performed monthly in pelagic, sublittoral, and eulittoral zones during a severe drought due to low rainfall in the summer. We used the chlorophyll-a concentration as a proxy for algal biomass. Differences in nutrient concentrations, water transparency, and depth were determined for two limnological phases. TP and light were significant predictors of algal chlorophyll-a. Lake volume continuously decreased and lost connectivity with the river. The drought increased the trophy, evidencing the tenuous threshold between mesotrophy and eutrophy in a subtropical lake. On a temporal scale, we observed the loss of chlorophyll-a in phytoplankton and epiphyton. The chlorophyll-a concentration fluctuated in the epipelon and increased in phytoplankton-metaphyton, especially in the eulittoral. The results showed a close connection between the pelagic and littoral zones. The phenomena that affect the morphometric variables, such as changes in the precipitation regime, can change trophic state lakes and algal community dynamics in marginal lakes. Our findings suggest that mesotrophic marginal lakes can become eutrophic due to the loss of river–lake connectivity, favoring high phytoplankton-metaphyton growth in wetland systems.
A new species of mailed catfish of genus Rhadinoloricaria (Siluriformes: Loricariidae: Loricariinae) from Rio Negro basin, Brazil
(2023-01-01) Crispim-Rodrigues, Jefferson L. [UNESP]; Bernt, Maxwell J.; Waltz, Brandon T.; Silva, Gabriel S. C. [UNESP]; Benine, Ricardo C. [UNESP]; Oliveira, Claudio [UNESP]; Covain, Raphaël; Roxo, Fábio F. [UNESP]; Universidade Estadual Paulista (UNESP); American Museum of Natural History; University of Louisiana at Lafayette; The Academy of Natural Sciences of Drexel University; ichtyologie
During a recent collection expedition to the Rio Negro, in the state of Amazonas, Brazil, eight individuals of an unknown species were collected, with a combination of characteristics that placed the species in the genus Rhadinoloricaria. Furthermore, the presence of two autapomorphic characteristics, including numerous elongated papillae on the lower lip and unbranched barbelets on the margin of lower lip, suggests that it is a new species. From morphological and phylogenetic analyses, including the sequencing of specific genes to calculate the maximum likelihood analyses, coupled with osteological computed tomography (CT) scan analyses, the authors corroborated that the specimens represent a new species of Rhadinoloricaria, described in the present study.
Broodstock management of the arrow crab Stenorhynchus seticornis and effects of temperature and salinity on larvae survival
(2023-01-01) Antunes, Mariana [UNESP]; de Paiva Barros-Alves, Samara [UNESP]; Alves, Douglas Fernandes Rodrigues [UNESP]; Gregati, Rafael Augusto [UNESP]; Negreiros-Fransozo, Maria Lucia [UNESP]; Universidade Estadual Paulista (UNESP); Universidade do Estado de Minas Gerais; Universidade Federal de Uberlândia (UFU); Universidade Estadual do Centro-Oeste
Was tested the viability of a rearing system for management of broodstock of crabs and the salinity and temperature effect in larval survival and duration of the larval stages of Stenorhynchus seticornis. We used a completely randomized 4 × 4 factorial experiment with 16 treatments and 3 replicates per treatment. Factor one was temperature with the following factor levels: 23 °C, 25 °C, 27 °C, and 29 °C and factor two was salinity: 25, 30, 35, and 40 PSU. A total of 960 larvae (zoea I), obtained from 7 females kept in the rearing system, were transferred and distributed in batches of 20 larvae kept in glass flasks (500 mL) and then subjected to temperature and salinity experiments. They were checked daily for seedlings or deaths. The larval development took from 22 to 25 days (7.3 ± 4.14), and occurred only in experimental conditions of 23 °C x 35 PSU, in which 6.6% of larvae reached the juvenile stage. About the the viability of a rearing system, 15 ovigerous females were maintained in the rearing system, composed by 6 aquaria with water-recirculation and filtering system (400 L), released from 1 to 4 viable larval lots each during 2 months. Such results highlight the importance of studies in larval interaction with environmental conditions regarding larval survival, enabling the juvenile offer for commercial purposes and restocking of native populations, also promoting a efficient system for broodstock maintenance and larval attainment for aquaculture.
Cage fish farming as a driver of changes in the functional diversity and structure of ichthyofauna in a Neotropical reservoir
(2023-01-01) Parra, Alini Beloto [UNESP]; Dias, João Henrique Pinheiro [UNESP]; Marques, Hugo; Balbuena, Juan Antonio; Ramos, Igor Paiva [UNESP]; Universidade Estadual Paulista (UNESP); Fishtag Environmental Consulting; University of Valencia
The Upper Paraná River Basin has the highest number of impoundments in South America. These provide areas for cage fish farms, which can have environmental impacts related to the release of organic matter into aquatic ecosystems. Despite the importance of using functional diversity analysis, no study has performed this type of assessment for freshwater environments. The aim of the present study is to establish whether (1) cage fish farming has caused functional impoverishment of local ichthyofauna; (2) modifications in functional diversity are mainly related to the diet of the fishes; and (3) cage fish farming has caused taxonomic re-structuring of the local ichthyofauna. Two areas of the Ilha Solteira Reservoir were surveyed, a cage fish farm and a control area located 10 km upstream of the fish farm area, and their wild ichthyofaunas were compared. Functional diversity, taxonomic diversity, and multivariate analyses were carried out. Traditional taxonomic diversity indices did not detect significant differences between the fish communities in fish farm and control areas. However, a significantly lower functional diversity and homogenization of eating habits in the fish community from the fish farm area was observed, just as there were changes in the structure of the ichthyofauna, caused by different dispersions of species abundance between areas. The present study highlights the necessity of using different evaluation methods and multifaceted diversity approaches to evaluate the environmental impact of fish farming.
FIRST RECORD OF Dianema urostriatum (MIRANDA RIBEIRO, 1912) (SILURIFORMES: CALLYCHTHIDAE), IN THE PUTUMAYO RIVER, AMAZON BASIN, PERU
(2022-01-01) Ruiz-Tafur, Morgan; Sánchez Riveiro, Homero; García-Ayala, James [UNESP]; Laboratorio de Taxonomía de Peces; Universidade Estadual Paulista (UNESP)
The presence of Dianema urostriatum (Miranda Ribeiro, 1912), is formally reported in tributaries of the Putumayo River, Perú, expanding its geographic distribution of the Amazon basin. This record enriches the Peruvian continental ichthyofauna.
Dimethyl acetamide and dimethyl sulfoxide associated at glucose and egg yolk for cryopreservation of Pseudoplatystoma corruscans semen
(2023-01-01) Velarde, Johanna Maritza Cano [UNESP]; Bastos, Natalia Marins; Carneiro-Leite, Laícia [UNESP]; Borges, Laís Pedroso [UNESP]; Vieira, Edson Guilherme [UNESP]; Veríssimo-Silveira, Rosicleire [UNESP]; Ninhaus-Silveira, Alexandre [UNESP]; Universidade Estadual Paulista (UNESP); Universidade de São Paulo (USP)
This study aimed to develop a protocol for the cryopreservation of Pseudoplatystoma corruscans semen. For this, mature males were hormonally induced with a single dose of carp pituitary extract (5 mg/kg body weight). Semen was collected and evaluated. Two cryoprotectants were tested to compose the diluents: dimethyl acetamide (DMA) and dimethyl sulfoxide (Me2 SO), in two concentrations (8% and 10%), + 5.0% glucose + 10% egg yolk. The semen was diluted in a 1: 4 ratio (semen: extender), packed in 0.5 mL straws and frozen in a dry shipper container in liquid nitrogen vapors. After thawing, sperm kinetics, sperm morphology and DNA integrity of cryopreserved sperm were evaluated. Pseudoplatystoma corruscans males produced semen with sperm motility > 80%. After thawing, all treatments provided semen with total sperm motility > 40%, with no significant difference (P < 0.05) between them, as well as between the other sperm kinetic parameters evaluated. The treatments with DMA provided a smaller fragmentation of the DNA of the gametes. Sperm malformations were identified in both fresh and cryopreserved semen, with a slight increase in these malformations being identified in sperm from thawed P. corruscans semen samples.
Relative growth and sexual maturity of the spider crab Libinia spinosa Guérin, 1832 (Brachyura: Majoidea: Epialtidae), from the Southeast Brazilian coast
(2023-01-01) Santos, Mateus Pereira [UNESP]; Fransozo, Vivian; Gonçalves, Geslaine R. L. [UNESP]; Costa, Rogério Caetano da [UNESP]; Negreiros-Fransozo, Maria Lucia [UNESP]; Universidade Estadual Paulista (UNESP); Vitória da Conquista; Scottish Association for Marine Science (SAMS)
We investigated the relative growth and sexual maturity (gonadal and morphometric) of Libinia spinosa. Crabs were sampled at Ubatuba from January to December 2000, using trawls. Based on allometric growth, males were grouped into juveniles (MJ), adolescents (MAd) and adults (MA) based on the relationship CPL (major cheliped propod length) vs. CW (cephalothorax width), all with positive allometric growth. For females, the relationship AW (abdomen width) vs. CW allowed segregating juveniles (FJ) from adults (FA), with positive allometric growth for FJ but isometric growth for FA. The morphometric maturity evidenced for MAd varies from 33.7 mm to 34.5 mm and for MA and FA. The size in which 50% of individuals reach the morphometric sexual maturity was L₅₀ = 50.1 mm for males and L₅₀ = 37.3 mm for females. Gonad maturity was L₅₀ = 33.7 mm for males and L₅₀ = 36.9 mm for females. Through relative growth analyses, we identified an adolescent male group (prepuberal phase). These individuals presented mature gonads, enabling them to copulate with females. These adolescent males may reproduce while avoiding competition with adult males, as it happens in other species of Majoidea that present more than two morphotypes in the population.
Ichthyofauna of Santa Helena Relevant Ecological Interest Area (REIA), Paraná, Brazil
(2022-01-01) Brandão, Heleno; Lange, Denise; Blanco, Daniel Rodrigues; Kampfert, Lucas Emilio Perin; Ramos, Igor Paiva [UNESP]; Universidade Tecnológica Federal do Paraná; Universidade Estadual Paulista (UNESP)
The Relevant Ecological Interest Area (REIA), popularly known as “Refúgio Biológico de Santa Helena”, is part of the Atlantic Forest Biome and one of the 78 ecoregions mapped by IBAMA as basic unit for planning priorities focused on national biodiversity conservation. Quarterly collections were carried out from November 2017 to November 2019 to inventory the ichthyofauna of this Conservation Unit. Specimens were captured with the aid of gillnets, fishing sieve and seine. In total, 3,919 specimens belonging to two class, eight orders, 27 families and 74 species were sampled. Characiformes and Siluriformes presented the highest species richness; they accounted for 40 (54%) and 17 (23%) species, respectively. Geophagus sveni (181 individuals = 17%), Trachelyopterus galeatus (109 individuals = 10%) and Schizodon borellii (105 individuals = 10%) were the most abundant fish species captured with gillnet. Moenkhausia was the most abundant genus captured with seine and fishing sieve, with emphasis on species Moenkhausia bonita (930 individuals = 33%) and Moenkhausia gracilima (845 individuals = 30%). Moreover, two “endangered” species (Brycon orbignyanus and Pseudoplatystoma corruscans) were registered. Therefore, we present an updated inventory of species belonging to the ichthyofauna of REIA, and it may contribute to future management plans focused on this Conservation Unit.
New evidence to demystify the supposed holoplanktonic life cycle in Ceriantharia (Cnidaria)
(2023-02-01) Lopes, Celine S. S. [UNESP]; Maronna, Maximiliano M.; Martinelli Filho, José E.; Morandini, André C.; Stampar, Sérgio N. [UNESP]; Universidade Estadual Paulista (UNESP); Universidade de São Paulo (USP); Universidade Federal do Pará (UFPA)
From the late 1890s to the mid-1900s, descriptions of Ceriantharia species based solely on analyses of the larval forms were a common practice. Such approaches resulted in taxonomic inconsistencies and an extensive number of species with unreviewed descriptions. The present study discusses the taxonomic position of individuals from the northern Amazon coast, Brazil, using morphological, molecular, and biogeographic data. DNA samples of three larvae were collected, the COI marker was amplified, and the sequences were analyzed and checked on the NCBI databases. The morphology of each larva collected was analyzed and compared with available data. Morphological, molecular, and biogeographical evidence led to identification of the larvae from Maiandeua Island (Pará) as Isarachnanthus nocturnus (den Hartog, 1977), which has a wide distribution along the Brazilian coast (from southern to northern Brazil) and the Caribbean Sea. The records also support the occurrence of the taxa in areas with estuarine influence. The larvae from Pará are morphologically similar to Ovactis brasiliensis van Beneden, 1897. However, due to inconsistent description performed by van Beneden (1897), we suggest that O. brasiliensis be considered a species inquirenda.
Male reproductive system of the freshwater prawn Macrobrachium brasiliense (Decapoda: Palaemonidae): Notes on spermatophore formation and sperm count
(2023-04-01) Nogueira, Caio S. [UNESP]; Antunes, Mariana [UNESP]; Zara, Fernando J. [UNESP]; Costa, Rogerio C. [UNESP]; Universidade Estadual Paulista (UNESP)
Studies on the morphology of the reproductive system are essential for understanding the reproduction processes of species or even within genera or families. The present study aimed to describe the functional morphology of the male reproductive system, spermatophore formation, and sperm count of Macrobrachium brasiliense. The anatomy of the reproductive system consists of a pair of testes from which the vasa deferentia (VD) starts, extending to the fifth pair of pereopods. The VD is divided into three regions: proximal (PVD), middle (MVD), and distal (DVD). In the PVD, there is a prominent fold, the typhlosole, formed by columnar cells. The typhlosole disappears in the MVD, being incorporated into one of the faces of the VD wall, identified by its simple columnar epithelium while the remainder of the vessel wall is formed by squamous or simple cubic epithelium. Columnar cells produce type-II and III secretion. The epithelium in the DVD is made up only of cubic cells. Low sperm concentration was observed when compared to other species of the genus Macrobrachium. In conclusion, the typhlosole and columnar epithelium are responsible for the asymmetric spermatophore, which seems the pattern of Macrobrachium that is probably shared with other caridean shrimps.
Association between Ichthyocladius (Diptera: Chironomidae) and armored catfishes in the Guareí River basin, São Paulo State, Brazil
(2022-01-01) Azevedo-Santos, Valter M. [UNESP]; Shimabukuro, Erika M.; Pelicice, Fernando M.; Henry, Raoul [UNESP]; Universidade Estadual Paulista (UNESP); Universidade de São Paulo (USP); Núcleo de Estudos Ambientais
Ichthyocladius is a genus of chironomid (Diptera, Insecta) whose immature forms live attached to the bodies of some species of freshwater fishes. Here we investigate the association between Ichthyocladius spp. and armored catfish in streams of the Guareí River basin, Paraná River system, Brazil. We provide the first record of I. lilianae associated with fish in the São Paulo State and the Paraná River basin. In addition, this is the first report of Ichthyocladius associated with the armored catfishes Hypostomus iheringii and H. tietensis. Lastly, we record two undescribed species of Chironomidae (i.e., Ichthyocladius sp. 1 and Ichthyocladius sp. 2) associated with fishes.
Juvenile morphology of the ornamental crab Mithraculus forceps A. Milne-Edwards, 1875 (Crustacea, Brachyura)
(2022-10-21) Galiotti, Lucas Lopes [UNESP]; Antunes, Mariana [UNESP]; Bolla, Eduardo A. [UNESP]; Negreiros-Fransozo, Maria Lucia [UNESP]; Universidade Estadual Paulista (UNESP); Science and Technology of São Paulo (IFSP)
The morphology of juveniles of Mithraculus forceps A. Milne-Edwards, 1875, raised in the laboratory, is described. The larvae were obtained from ovigerous females collected in the wild, maintained in the rearing system for culture of crabs (400 L). A total of 229 larvae (zoea I), from 7 females were distributed in lots of 20 larvae kept in glass flasks (500 ml), with seawater circulation and temperature and salinity constants, which were checked daily for molts or deaths. After the larvae reached the juvenile stage, exuviae and dead specimens were deposited in a scientific collection. We analyzed the external morphology (N = 10 ind.) of each size class (total = 8). We determined the number of size classes, based on carapace width CW vs. carapace length CL (mm) and its dispersion points, in which we can observe non-hierarchical groupings with no size classes overlapping. We analyzed the relative growth of the juveniles using the technique “Standard Major Axis’’ (Type II regression). The relationships CW vs. CL and CW vs. AW showed negative allometry (b < 1; p < 0.05). The relationships CW vs. CPH and CW vs. CPL are isometric (b = 1; p > 0.05). The most remarkable morphological characters of the juveniles (first size class) are the following: spines at the anterior margin of the carapace, inner marginal teeth in the propodus and dactylus of the chelipeds, number of articles in the antennular endopod and the maxillular endopod, absence of setae on the maxillar endopod, and absence of rudimentary pleopods.
Structure and composition of ichthyofauna associated with cage fish farming and compared to a control area after severe drought in a Neotropical reservoir
(2022-01-01) Orlandi-Neto, Aymar [UNESP]; Amorim, Rafael Vieira [UNESP]; Delariva, Rosilene Luciana; Camargo, Antonio Fernando Monteiro [UNESP]; Veríssimo-Silveira, Rosicleire [UNESP]; Ramos, Igor Paiva [UNESP]; Universidade Estadual Paulista (UNESP); Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais
In 2014, an atypical drought in Southeast Brazil drastically reduced the water level in several reservoirs. We investigated the effects of this drought and the subsequent flood period on the attributes of ichthyofauna in an aquaculture and in a control area. Fish were collected bimonthly between 2014 and 2015 (drought) and 2016 (wet), using gill nets in the two sample areas in the Ilha Solteira reservoir, Upper Paraná River basin, Brazil. We compared ichthyofauna attributes between the drought and wet seasons in each area and between areas within each season. In the aquaculture area, the assemblages showed similar characteristics between the seasons. By contrast, the control area varied between seasons, with greater species richness, Shannon diversity, species evenness, and less β diversity in the wet season. Comparisons between areas in each season showed higher abundance in the fish farm within the drought season. Changes in structure and composition in the control area are possibly associated with new areas and resources made available by the flooding of marginal areas during the wet season. We inferred that the effect of the flood on the aquaculture community was attenuated by the continuous habitat structure such as shelters and food provided by the enterprise.
The rise and fall of the giant stromatolites of the Lower Permian Irati Formation (Paraná Basin, Brazil): A multi-proxy based paleoenvironmental reconstruction
(2022-11-15) Antunes, G. C. [UNESP]; Warren, L. V. [UNESP]; Okubo, J. [UNESP]; Fairchild, T. R.; Varejão, F. G.; Uhlein, G. J.; Inglez, L. [UNESP]; Poiré, D. G.; Bahniuk, A. M.; Simões, M. G. [UNESP]; Universidade Estadual Paulista (UNESP); Universidade de São Paulo (USP); Federal University of Ouro Preto (UFOP); Universidade Federal de Minas Gerais (UFMG); UNLP-CONICET; Universidade Federal do Paraná (UFPR)
Giant stromatolites are meter-scale laminated carbonate biosedimentary deposits formed by the action of benthic microbiota under very specific conditions. Although occurrences of giant stromatolites are relatively common in Precambrian deposits, the Phanerozoic record is still sparse. Here, we carried out an integrated analysis of the Lower Permian Santa Rosa de Viterbo giant stromatolite field, developed in a mixed carbonate-siliciclastic depositional system within a restricted intracontinental basin (Irati Formation, Paraná Basin, Brazil). Using available and new descriptions of stromatolite morphology and associated facies, we applied a multi-proxy approach based upon sedimentological, paleontological, geochemical, and isotopic data to develop a detailed paleoenvironmental model for this particular occurrence. The NE-SW elongated giant stromatolites – of >3 m in height, > 7 m in length, and > 1 m wide – have variable external shape and internal morphology, indicating changing growth strategy due to variations in the hydrodynamic conditions, bathymetry, and terrigenous input. Increasing δ13C values towards the top of the succession are related to intense microbial activity, increased nutrient supply, and enhanced primary productivity, with the higher δ13C values matching the global Permian seawater signal. Y/Ho and La/La* ratios indicate a less restricted setting towards the top of the succession, which is consistent with the increasing water depth recorded by the stromatolite morphology. The combination of smooth lamination, exclusively coccoidal microbial community, and fossil content, point to deposition under high (possibly hyper) salinity conditions for most of the succession. Our data suggests that the existence of stressful conditions (i.e., strong currents and high salinity) protected the benthic microbial communities from predation and favored EPS production, generating the ideal conditions for the growth of giant stromatolites, a very uncommon situation in the Phanerozoic.
Effects of human disturbance on habitat and fish diversity in Neotropical streams
(2022-09-01) Larentis, Crislei; Kliemann, Bruna Caroline Kotz [UNESP]; Neves, Mayara Pereira; Delariva, Rosilene Luciana; Universidade Estadual de Maringá (UEM); Universidade Estadual Paulista (UNESP); Universidade Federal do Rio Grande do Sul; Universidade Estadual do Oeste do Paraná- UNIOESTE
Human pressures have been intensely modifying freshwater ecosystems worldwide. We assessed the effects of human pressure on habitat diversity and primary productivity to understand the consequences on fish fauna in 25 tropical and subtropical streams of two globally important ecoregions: Iguassu and Upper Paraná. We hypothesized that the increased human pressure (urbanization and agriculture) on stream environments, both at the local and catchment scales, directly decreases habitat diversity. We also hypothesized that increased human pressure triggers changes in primary productivity and fish fauna composition and structure. We evaluated the human pressure intensity using the Integrated Disturbance Index and the Rapid Habitat Diversity Assessment protocol, which combines information about land use, land cover and environmental characteristics of the stream catchment and sampling sites. Streams with increased human disturbance had lower habitat diversity, higher primary productivity, and high non-native species abundance. Fish compositional turnover was associated with increased human disturbance. Native and degradation-sensitive fish species, especially endemic ones, were associated with streams with higher habitat diversity and forested cover. Degradation-resistant fishes, mostly nonnative species, were associated with streams with higher human disturbance and urban land use. Although human pressure did not affect species richness, Shannon diversity, and Simpson dominance, there were significant effects on numerical abundance and fish species equitability. In this study, human pressure directly affected habitat structure, with indirect consequences for fish fauna, increasing the potential for local extirpation of rare species.
RELATIVE GROWTH OF THE SPECKLED SWIMMING CRAB ARENAEUS CRIBRARIUS (LAMARCK, 1818) (BRACHYURA, PORTUNIDAE), NEAR UBATUBA, STATE OF SÃO PAULO, BRAZIL
(1993-01-01) Pinheiro, Marcelo Antonio Amaro [UNESP]; Fransozo, Adilson [UNESP]; Universidade Estadual Paulista (UNESP)
Arenaeus cribrarius is a mainly tropical crab that occurs in the Western Atlantic Ocean, Brazil being its type-locality. The species ranges from Vineyard Sound, Massachusetts, USA to La Paloma, Uruguay. Information about this species is scarce. The relative growth ofA. cribrarius was analyzed, based on some morphometric relations, where the carapace width, excluding lateral spines (CW), was used as an independent variable. A total of 403 specimens (189 males and 214 females), was collected in Ubatuba, State of São Paulo, Brazil, with otter-trawls. The animals were sexed and sorted to maturation phase (juvenile or adult). Some measurements were made: carapace (length and width excluding lateral spines), abdomen (greatest width of the fifth somite in females and the sixth in males) and major chela (greatest length, width and height, dactylus length). This study was made by the application of the power function (y=a.xb) which was fitted to the data and the pattern of growth established for each parameter by the b-value (constant of allometry), as positive allomctry (b>1), negative allometry (b<1) or isometry (b=1). The mor- phometric relations of the carapace showed a tendency to isometry. In females, the abdominal width grew in positive allometry, higher in juveniles (b= 1.33) than in adults (b=1.18). In this case, an overlap and discontinuity was noticed between the phases over a carapace width range of 55 to 70 mm, where the puberty molt occurs. The majority of relationships showed that the major chela of the males grew in positive allometry, however, the greatest allometric difference between the phases was observed towards the propodus length with 1.09 as juvenile and 1.26 as adult b- values. In the males, this variable showed an inflection between the CW range of 45 to 55 mm, where the transition to the maturation phase occurs. The relative growth of this species is similar to those of previously studied species. This indicates, that the propodus length and the abdominal width are the morphometric variables most appropriate to estimate the size at the beginning of the sexual maturity for males and females of this species, respectively.
Description and life cycle of a new species of the genus Arachnanthus (Cnidaria: Anthozoa: Ceriantharia) from the Southwestern Atlantic Ocean
(Peerj Inc, 2023-05-22) Lopes, Celine S. S. [UNESP]; Scarabino, Fabrizio; Carranza, Alvar; Munoz, Ricardo Gonzalez; Morandini, Andre C.; Nagata, Renato Mitsuo; Stampar, Sergio Nascimento [UNESP]; Universidade Estadual Paulista (UNESP); Univ Republ; Museo Nacl Hist Nat; Univ Nacl Mar Del Plata; Universidade de São Paulo (USP); Univ Fed Rio Grande
Background. Ceriantharia is a subclass of the phylum Cnidaria, which comprises tubedwelling marine invertebrates. This subclass is composed of three families, including Arachnactidae, with two known genera. Currently, the genus Arachnanthus has five valid species recorded from Australia, the Mediterranean Sea and both the Southern and Northern Pacific Ocean. However, at the moment, there is no record of organisms of this family from the South Atlantic Ocean. Besides that, the life cycle of any species of the genus Arachnanthus is known. The present study describes a new species of the genus Arachnanthus and its life cycle, based on specimens from Uruguay and South of Brazil. Methods. Larvae were collected by plankton net in Rio Grande-Brazil and the development and external morphology of these specimens were observed in the laboratory during two years, and subsequently described. Additionally, nine adult ceriantharians correspondent to the larvae from Rio Grande were collected in Uruguay and their external and internal anatomies, and cnidome were described. Results. Arachnanthus errans sp. nov. exhibited a free-swimming, short-lived cerinula larvae that spent short-time on the plankton. The larva developed into small and translucent polyps with a short actinopharynx, one pair of mesenteries attached to a siphonoglyph, and a medium first pair of metamesenteries. Further, the adult polyp displayed an unprecedented locomotion behavior in Ceriantharia that is first reported here, it can crawl under and in between the sediment.
NEOTROPICAL FRESHWATER FISHES: a dataset of occurrence and abundance of freshwater fishes in the Neotropics
(Wiley-Blackwell, 2023-04-01) Tonella, Livia Helena; Ruaro, Renata; Daga, Vanessa Salete; Garcia, Diego Azevedo Zoccal; Vitorino Junior, Oscar Barroso; Lobato-de Magalhaes, Tatiana; Reis, Roberto Esser dos; Di Dario, Fabio; Petry, Ana Cristina; Mincarone, Michael Maia; Assis Montag, Luciano Fogaca de; Pompeu, Paulo Santos; Teixeira, Adonias Aphoena Martins; Carmassi, Alberto Luciano; Sanchez, Alberto J.; Giraldo Perez, Alejandro; Bono, Alessandra; Datovo, Alessio; Flecker, Alexander S.; Sanches, Alexandra; Godinho, Alexandre Lima; Matthiensen, Alexandre; Peressin, Alexandre; Hilsdorf, Alexandre Wagner Silva; Barufatti, Alexeia; Hirschmann, Alice; Jung, Aline; Cruz-Ramirez, Allan K.; Braga Silva, Alline; Cunico, Almir Manoel; Saldanha Barbosa, Amanda; Castro Barradas, Amauri de; Rego, Ana Carolina Lacerda; Franco, Ana Clara Sampaio; Costa, Ana Paula Lula; Vidotto-Magnoni, Ana Paula; Ferreira, Anderson; Kassner Filho, Anderson; Nobile, Andre Batista [UNESP]; Magalhaes, Andre Lincoln Barroso; Silva, Andre Teixeira da; Bialetzki, Andrea; Santos Maroclo Gomes, Andrea Cristina dos; Nobre, Andrezza Bellotto; Casimiro, Armando Cesar Rodrigues; Angulo Sibaja, Arturo; Santos, Arthur Alexandre Capelli dos; Araujo, atila Rodrigues de; Frota, Augusto; Quirino, Barbara Angelio; Ferreira, Beatriz Moreira; Albuquerque, Bianca Weiss; Meneses, Bruna Arbo; Oliveira, Brunno Tolentino; Torres Parahyba Campos, Bruno Augusto; Goncalves, Bruno Bastos; Kubiak, Bruno Busnello; Silveira Prudente, Bruno da; Araujo Passos Pacheco, Bruno Gorini de; Nakagawa, Bruno Kazuo; Nascimento, Bruno Tayar Marinho do; Maia, Calebe; Cantagallo Devids, Camila; Rezende, Carla Ferreira; Munoz-Mendoza, Carla; Peres, Carlos A.; Rodrigues Filho, Carlos Alberto De Sousa; Lucena, Carlos Alberto Santos de; Fernandes, Carlos Alexandre; Kasper, Carlos Benhur; Donascimiento, Carlos A.; Emidio Junior, Carmino; Carrillo-Moreno, Carolina; Machado, Carolina; Donascimiento, Carlos; Emidio Jr, Carmino; Pera, Carolina; Hartmann, Caroline; Pringle, Catherine M.; Leal, Cecilia Gontijo; Jezequel, Celine; Harrod, Chris; Rosa, Clarissa Alves da; Quezada-Romegialli, Claudio; Pott, Crisla Maciel; Larentis, Crislei; Nascimento, Cristiane A. S.; Silva Goncalves, Cristina da [UNESP]; Cunha, Cristina Jaques da; Pisicchio, Cristina Moreira; Carvalho, Daniel Cardoso de; Galiano, Daniel; Gomez-Uchida, Daniel; Santana, Daniel Oliveira; Salas Johnson, Daniel; Petsch, Danielle Katharine; Freitas, Danielly Torres Hashiguti de; Bailly, Dayani; Machado, Debora Ferreira; Carvalho, Debora Reis de; Topan, Dhyego Hamilton; Canas-Rojas, Diego; Silva, Diego da; Freitas-Souza, Diogo; Lima-Junior, Dilermando Pereira; Piscor, Diovani; Moraes, Djalma Pereira; Viana, Douglas; Caetano, Dyego Leonardo Ferraz; Gubiani, eder Andre; Okada, Edson K.; Amaral, Eduardo Cazuni do [UNESP]; Brambilla, Eduardo Meneguzzi; Cunha, Eduardo Ribeiro; Kashiwaqui, Elaine Antoniassi Luiz; Rocha, Elise Amador [UNESP]; Barp, Elisete Ana [UNESP]; Costa Fraga, Elmary da; D'Bastiani, Elvira; Zandona, Eugenia; Dary, Eurizangela Pereira; Benedito, Evanilde; Barba-Macias, Everardo; Calvache Uvidia, Evelyn Vanessa; Fonseca, Fabiana Luques; Ferreira, Fabiane Silva; Lima, Fabio; Maffei, Fabio [UNESP]; Porto-Foresti, Fabio [UNESP]; Teresa, Fabricio Barreto; Andrade Frehse, Fabricio de; Oliveira, Fagner Junior M.; Silva, Felipe Pessoa da; Lima, Felipe Pontieri de; Prado, Fernanda Dotti do [UNESP]; Jerep, Fernando Camargo; Vieira, Fernando Emmanuel Goncalves; Gertum Becker, Fernando; Carvalho, Fernando Rogerio de; Ubaid, Flavio Kulaif; Teixeira, Francisco Keilo; Rizzi, Francisco Provenzano; Severo-Neto, Francisco; Villamarin, Francisco; Mello, Franco Teixeira de; Keppeler, Friedrich Wolfgang; Batista, Gabriel de Avila; Menezes Yazbeck, Gabriel de; Tesitore, Giancarlo; Salvador, Gilberto Nepomuceno; Soteroruda Brito, Gita Juan; Carmassi, Giulianna Rondineli; Kurchevski, Gregorio; Goyenola, Guillermo; Pereira, Hasley Rodrigo; Alvez, Helen Jamille Fernandes Silva; Prado, Helena Alves do; Pinho, Henrique Ledo Lopes; Sousa, Hingara Leao; Bornatowski, Hugo; Oliveira Barbosa, Hugo de; Tobes, Ibon; Paiva Affonso, Igor de; Queiroz, Igor Raposo; Vila, Irma; Negrete, Ivan Vinicio Jacome; Prado, Ivo Gaviao; Vitule, Jean Ricardo Simoes; Figueiredo-Filho, Jesse; Gonzalez, Jessica Antunez; Faria Falcao, Jessica Caroline de; Teixeira, Jessica Vieira; Pincheira-Ulbrich, Jimmy; Silva, Jislaine Cristina da; Araujo Filho, Joao Antonio de; Silva, Joao Fernando Marques da; Genova, Joao Gabriel; Giovanelli, Joao Gabriel Ribeiro; Andriola, Joao Vitor Perin; Alves, Jonatas; Valdiviezo-Rivera, Jonathan; Liotta, Jorge; Botero, Jorge Ivan Sanchez; Ramirez, Jorge Luis; Marinho, Jorge Reppold; Birindelli, Jose Luis Olivan; Novaes, Jose Luis Costa; Hawes, Joseph E.; Ribolli, Josiane; Rivadeneira, Juan Francisco; Schmitter-Soto, Juan Jacobo; Assis, Juliana Camara [UNESP]; Silva, Juliana Paulo da; Santos, Juliana Silveira dos [UNESP]; Wojciechowski, Juliana; Bogoni, Juliano Andre; Ferrer, Juliano; Solorzano, Julio Cesar Jut; Sa-Oliveira, Julio Cesar; Vaini, Jussara Oliveira; Contreras Palma, Kamila; Orlandi Bonato, Karine; Lima Pereira, Karla Dayane de; Santos Sousa, Kassiano dos; Borja-Acosta, Kevin Giancarlo; Carneiro, Lais; Faria, Larissa; Oliveira, Leonardo Brito de; Resende, Leonardo Cardoso; Silva Ingenito, Leonardo Ferreira da; Oliveira Silva, Leonardo; Rodrigues, Leydiane Nunes; Guarderas-Flores, Lida; Martins, Lidiane; Tonini, Lorena; Braga, Lorrana Thais Maximo Durville; Gomes, Louise Cristina; Fries, Lucas de; Silva, Lucas Goncalves da; Jarduli, Lucas Ribeiro; Lima, Luciano Benedito; Gomes Fischer, Luciano; Wolff, Luciano Lazzarini; Santos, Luciano Neves dos; Bezerra, Luis Artur Valoes; Sarmento Soares, Luisa Maria; Manna, Luisa Resende; Duboc, Luiz Fernando; Santos Ribas, Luiz Guilherme dos; Malabarba, Luiz Roberto; Brito, Marcelo Fulgencio Guedes; Braga, Marcelo Renno; Almeida, Marcelo Silva de; Sily, Maria Cecilia; Barros, Maria Claudene; Nascimento, Maria Histelle Sousa do; Souza Delapieve, Maria Laura de; Piedade, Maria Teresa Fernandez; Tagliaferro, Marina; Pinna, Mario Cesar Cardoso de; Yanez-Munoz, Mario H.; Orsi, Mario Luis; Rosa, Marlon Ferraz da; Bastiani, Marlos; Stefani, Marta Severino; Buenano-Carriel, Martha; Moreno, Martha Elena Valdez; Carvalho, Mateus Moreira de; Kuetter, Mateus Tavares; Freitas, Matheus Oliveira; Canas-Merino, Mauricio; Cetra, Mauricio; Herrera-Madrid, Mauricio; Petrucio, Mauricio Mello; Galetti, Mauro [UNESP]; Salcedo, Miguel Angel; Pascual, Miguel; Ribeiro, Milton Cezar [UNESP]; Abelha, Milza Celi Fedatto; Silva, Monica Andrade da; Araujo, Monica Pacheco de; Dias, Murilo Sversut; Guimaraes Sales, Naiara; Benone, Naraiana Loureiro; Sartor, Natane; Fontoura, Nelson Ferreira; Souza Trigueiro, Nicholas Silvestre de; Alvarez-Pliego, Nicolas; Shibatta, Oscar Akio; Tedesco, Pablo A.; Lehmann Albornoz, Pablo Cesar; Santos, Pablo Henrique Fernandes; Freitas, Pamela Virgolino; Fagundes, Patricia Calegari; Freitas, Patricia Domingues de; Mena-Valenzuela, Patricio; Tufino, Paul; Catelani, Paula Araujo; Peixoto, Paula; Ilha, Paulo; Aquino, Pedro De Podesta Uchoa de; Gerhard, Pedro; Carvalho, Pedro Hollanda; Jimenez-Prado, Pedro; Galetti, Pedro Manoel; Borges, Pedro Paulino; Nitschke, Pedro Peixoto; Manoel, Pedro Sartori; Bernardes Peronico, Phamela; Soares, Philip Teles; Piana, Pitagoras Augusto; Cunha, Priscila de Oliveira; Plesley, Priscila; Souza, Rafael Couto Rosa de; Rosa, Rafael Rogerio; El-Sabaawi, Rana W.; Rodrigues, Raoni Rosa; Covain, Raphael; Loures, Raquel Coelho; Braga, Raul Renno; Re, Reginaldo; Bigorne, Remy; Cassemiro Biagioni, Renata; Silvano, Renato Azevedo Matias; Dala-Corte, Renato Bolson; Martins, Renato Tavares; Rosa, Ricardo; Sartorello, Ricardo; Almeida Nobre, Rodrigo de; Bassar, Ronald D.; Gurgel-Lourenco, Ronaldo Cesar; Pinheiro, Ronaldo Fernando Martins; Carneiro, Ronaldo Leal; Florido, Rosa; Mazzoni, Rosana; Silva-Santos, Rosane; Paula Santos, Rosiane de; Delariva, Rosilene Luciana; Hartz, Sandra Maria; Brosse, Sebastien; Althoff, Sergio Luiz [UNESP]; Nobrega Marinho Furtado, Shaka; Lima-Junior, Sidnei Eduardo; Lustosa Costa, Silvia Yasmin; Arrolho, Solange; Auer, Sonya K.; Bellay, Sybelle; Fatima Ramos Guimaraes, Tais de; Francisco, Talitha Mayumi; Mantovano, Tatiane; Gomes, Tatyana; Ramos, Telton Pedro Anselmo; Assis Volpi, Thais de; Emiliano, Thais Moura; Barbosa, Thiago Augusto Pedroso; Balbi, Thiago Jose; Silva Campos, Thiago Nascimento da; Silva, Thiago Teixeira; Occhi, Thiago Vinicius Trento; Garcia, Thiely Oliveira; Silva Freitas, Tiago Magalhaes da; Begot, Tiago Octavio; Silveira, Tony Leandro Rezende da; Lopes, Ueslei; Schulz, Uwe Horst; Fagundes, Valeria; Silva, Valeria Flavia Batista da; Azevedo-Santos, Valter M.; Ribeiro, Vanessa; Tiburcio, Vanessa Graciele; Almeida, Vera Lucia Lescano de; Isaac-Nahum, Victoria J.; Abilhoa, Vinicius; Campos, Vinicius Farias; Kuetter, Vinicius Tavares; Mello Cionek, Vivian de; Prodocimo, Viviane; Vicentin, Wagner; Martins, Waldney Pereira; Moraes Pires, Walna Micaelle de; Graca, Weferson Junio da; Smith, Welber Senteio [UNESP]; Dattilo, Wesley; Aguirre Maldonado, Windsor Efren; Carvalho Rocha, Yuri Gomes Ponce de; Suarez, Yzel Rondon; Lucena, Zilda Margarete Seixas de; Universidade Estadual de Maringá (UEM); 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The Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large-scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north to the southern limits in Argentina, Paraguay, Chile, and Uruguay. We compiled 185,787 distribution records, with unique georeferenced coordinates, for the 4225 species, represented by occurrence and abundance data. The number of species for the most numerous orders are as follows: Characiformes (1289), Siluriformes (1384), Cichliformes (354), Cyprinodontiformes (245), and Gymnotiformes (135). The most recorded species was the characid Astyanax fasciatus (4696 records). We registered 116,802 distribution records for native species, compared to 1802 distribution records for nonnative species. The main aim of the NEOTROPICAL FRESHWATER FISHES data set was to make these occurrence and abundance data accessible for international researchers to develop ecological and macroecological studies, from local to regional scales, with focal fish species, families, or orders. We anticipate that the NEOTROPICAL FRESHWATER FISHES data set will be valuable for studies on a wide range of ecological processes, such as trophic cascades, fishery pressure, the effects of habitat loss and fragmentation, and the impacts of species invasion and climate change. There are no copyright restrictions on the data, and please cite this data paper when using the data in publications.
Notes on the fecundity of the caridean shrimp Cuapetes americanus (Kingsley, 1878) in two preserved areas in Sao Paulo State: Laje de Santos and Vitoria Island
(Soc Brasileira Carcinologia, 2022-12-16) Rocha de Moraes, Isabela Ribeiro [UNESP]; Ramos Trevisan, Marcia Rafaela [UNESP]; Barros Rodrigues, Gabriel Fellipe [UNESP]; Silva, Alexandre Ribeiro da; Castilho, Antonio Leao [UNESP]; Universidade Estadual Paulista (UNESP); Universidade de São Paulo (USP)
In the Atlantic Ocean, the shrimp Cuapetes americanus (Kingsley, 1878) is well distributed. This species has been studied regarding its taxonomic status, distribution records, and some biological and reproductive traits. However, its fecundity and reproductive aspects have never been evaluated in Brazilian waters before. SCUBA (Self Contained Underwater Breathing Apparatus) diving and Artificial Refuge Substrate were used to sample C. americanus specimens quarterly in a sheltered location in the Marine State Parks of Laje de Santos and Vitoria Island for a year (2015-2016). A total of 45 animals (carapace length 1.35-4.54 mm) were sampled: 6 females; 18 ovigerous females; 3 juveniles; and 17 males. The major axis references were employed to analyze the relationship between the second pleura (SPL) and the carapace length (CL). The fecundity was 87.05 +/- 80.50 eggs and it was similar to other populations connected to it, and it was exclusively associated favorably with CL. Despite being a small and inconspicuous species, C. americanus is a caridean shrimp species that has evolved to thrive and breed on continental islands. The importance of the creation and revision of management plans for no-take marine areas on the Brazilian coast is supported when many kinds of information about the ecology and biology of the species are available, such as caridean shrimps, which can be present as a link between trophic levels of the aquatic food web.

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