cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14283281
title: Distribution and abundance of zoeae I (Crustacea, Brachyura) on a coral reef in the southwest Gulf of Mexico

description: Abstract In this study we analyze both seasonal and inter-annual variations in the community parameters of Brachyura zoea I in the Parque Nacional Sistema Arrecifal Veracruzano. Planktonic samples from four transects were collected during three weather conditions: cold fronts; rainy and dry conditions in 2011 and 2012; and cold fronts and dry conditions in 2013. We measured temperature, salinity, and dissolved oxygen, in situ, to determine whether these parameters could explain the observed variations in the community patterns of brachyuran zoea I. We collected zoeae I of 18 species of brachyurans. The dominant species were Libinia dubia H. Milne Edwards, 1834; Menippe nodifrons Stimpson, 1859; and Callinectes sapidus Rathbun, 1896. The temperature and dissolved oxygen were the highest during the rainy conditions and the salinity during the dry conditions in the southern transects. The highest species richness (14) and diversity (2.97 bits individual-1) were found in central transects during cold front conditions. However, we found the highest species richness and diversity during the dry conditions, in the southern transects. Libinia dubia presented the highest density during cold fronts with 1592 ± 127 zoeae 100 m−3 in the northern transect, followed by C. sapidus in the north-central transect, this was observed for both species in the offshore zone. In conclusion, the parameters of the community of zoea I were influenced by the physical parameters measured in each sampling zone.
DOI: 10.6084/m9.figshare.14283279
title: Relative growth of Menippe frontalis (Crustacea: Brachyura) in the Gulf of Guayaquil, Ecuador, by multi-model approach

description: Abstract Relative growth can help to identify dimorphism between individuals, and it is also used to determine changes in ontogeny related to sexual maturity. The morphometric variables recorded were width, length and height in carapace and chelae. The abdomen width was taken only in females. Data analysis was made separating males and females. Exploratory analysis used maximum, minimum and mean values and compared these values between sexes using MANOVA, ANOVA and LSD-Fisher methods. A weight-size relationship was also determined. Relative growth was estimated using a multi-model approach. Six models were applied, and the best was selected using Akaike and Bayesian information criteria. Residual versus predicted graphics were also produced based on the selected models. The mean sizes were similar between sexes, but the maximum values were observed in males. The weight-size relationships showed a negative allometry. The best model varied by morphometric variables and sex, but the type of relative growth was principally isometric and negative allometry. Biometric characteristics in Menippe frontalis A. Milne-Edwards, 1879 did not show abrupt changes in the relative growth. The threshold was not assumed as an indicator of morphometric sexual maturity however, they may be used for establishing legal minimum size in M. frontalis.
DOI: 10.6084/m9.figshare.14283279.v1
title: Relative growth of Menippe frontalis (Crustacea: Brachyura) in the Gulf of Guayaquil, Ecuador, by multi-model approach

description: Abstract Relative growth can help to identify dimorphism between individuals, and it is also used to determine changes in ontogeny related to sexual maturity. The morphometric variables recorded were width, length and height in carapace and chelae. The abdomen width was taken only in females. Data analysis was made separating males and females. Exploratory analysis used maximum, minimum and mean values and compared these values between sexes using MANOVA, ANOVA and LSD-Fisher methods. A weight-size relationship was also determined. Relative growth was estimated using a multi-model approach. Six models were applied, and the best was selected using Akaike and Bayesian information criteria. Residual versus predicted graphics were also produced based on the selected models. The mean sizes were similar between sexes, but the maximum values were observed in males. The weight-size relationships showed a negative allometry. The best model varied by morphometric variables and sex, but the type of relative growth was principally isometric and negative allometry. Biometric characteristics in Menippe frontalis A. Milne-Edwards, 1879 did not show abrupt changes in the relative growth. The threshold was not assumed as an indicator of morphometric sexual maturity however, they may be used for establishing legal minimum size in M. frontalis.
DOI: 10.6084/m9.figshare.14283281.v1
title: Distribution and abundance of zoeae I (Crustacea, Brachyura) on a coral reef in the southwest Gulf of Mexico

description: Abstract In this study we analyze both seasonal and inter-annual variations in the community parameters of Brachyura zoea I in the Parque Nacional Sistema Arrecifal Veracruzano. Planktonic samples from four transects were collected during three weather conditions: cold fronts; rainy and dry conditions in 2011 and 2012; and cold fronts and dry conditions in 2013. We measured temperature, salinity, and dissolved oxygen, in situ, to determine whether these parameters could explain the observed variations in the community patterns of brachyuran zoea I. We collected zoeae I of 18 species of brachyurans. The dominant species were Libinia dubia H. Milne Edwards, 1834; Menippe nodifrons Stimpson, 1859; and Callinectes sapidus Rathbun, 1896. The temperature and dissolved oxygen were the highest during the rainy conditions and the salinity during the dry conditions in the southern transects. The highest species richness (14) and diversity (2.97 bits individual-1) were found in central transects during cold front conditions. However, we found the highest species richness and diversity during the dry conditions, in the southern transects. Libinia dubia presented the highest density during cold fronts with 1592 ± 127 zoeae 100 m−3 in the northern transect, followed by C. sapidus in the north-central transect, this was observed for both species in the offshore zone. In conclusion, the parameters of the community of zoea I were influenced by the physical parameters measured in each sampling zone.
DOI: 10.6084/m9.figshare.14283284
title: Gonadosomatic index and weight/length relationship in females of three penaeoidean shrimps impacted by fisheries on the southeastern Brazilian coast

description: Abstract The aim of this study was to evaluate the gonadosomatic index (GSI) and the weight/length ratio in important shrimp populations (Xiphopenaeus kroyeri (Heller, 1862), Litopenaeus schmitti (Burkenroad, 1936), Rimapenaeus constrictus (Stimpson, 1874)) from the northern littoral of São Paulo State. The samples were collected between 2015 and 2016, with 212 females that were identified, classified according to their gonadal development stage, and measured (CL). The gonads were macroscopically classified into immature, spent and developed, and were then removed. Both body (BodW) and gonad (GonW) dry weights were obtained in order to calculate the gonadosomatic index. Weight/length relationship and weight gain rate were assessed. The weight gain presented negative allometry, indicating that the animals grow faster than they gain weight. The weight/length relationship showed a pattern of continuous reproduction, as previously determined for tropical species. From the GSI values, it was possible to separate the three predetermined gonadal stages, proving that macroscopic evaluation is reliable for evaluating the reproductive period of these shrimps. These results can be used as a guide for fishery stocks management and monitoring.
DOI: 10.6084/m9.figshare.14283285
title: Evaluating two sampling methodologies for shrimp density and biomass estimates in streams

description: Abstract Freshwater shrimp can reach high biomasses, affecting ecosystem processes. It is important to define the most accurate methodology to estimate their densities and biomass. We studied two species of different sizes, Potimirim brasiliana Villalobos F., 1960 and Macrobrachium olfersii (Wiegmann, 1836), in three sites of a coastal stream in Ilha Grande, Rio de Janeiro, Brazil. We evaluated the efficiency of two infrequently used sampling methods: a depletion method using electrofishing, and a substrate method using benthic samplers. The methodologies provided different estimates, especially for M. olfersii, of density (electrofishing 1.27 ± 6.3 ind/m²; substrate sampling 0.1 ± 5.05 ind/m²) and biomass (electrofishing 1.66 ± 8.5 g/m²; substrate sampling 0.11 ± 1.16 g/m²). The median size of M. olfersii was higher for electrofishing, while the median size of P. brasiliana was higher for substrate sampling. Electrofishing is good at collecting bigger individuals that are not possible to catch with the substrate method and it samples a bigger area that includes many different microhabitats. The substrate method is cost-effective, especially for P. brasiliana, but by sampling a small area, its estimates can be highly affected by local heterogeneity. The substrate method is not recommended for M. olfersii, as it underestimated both its density and biomass.
DOI: 10.6084/m9.figshare.14283284.v1
title: Gonadosomatic index and weight/length relationship in females of three penaeoidean shrimps impacted by fisheries on the southeastern Brazilian coast

description: Abstract The aim of this study was to evaluate the gonadosomatic index (GSI) and the weight/length ratio in important shrimp populations (Xiphopenaeus kroyeri (Heller, 1862), Litopenaeus schmitti (Burkenroad, 1936), Rimapenaeus constrictus (Stimpson, 1874)) from the northern littoral of São Paulo State. The samples were collected between 2015 and 2016, with 212 females that were identified, classified according to their gonadal development stage, and measured (CL). The gonads were macroscopically classified into immature, spent and developed, and were then removed. Both body (BodW) and gonad (GonW) dry weights were obtained in order to calculate the gonadosomatic index. Weight/length relationship and weight gain rate were assessed. The weight gain presented negative allometry, indicating that the animals grow faster than they gain weight. The weight/length relationship showed a pattern of continuous reproduction, as previously determined for tropical species. From the GSI values, it was possible to separate the three predetermined gonadal stages, proving that macroscopic evaluation is reliable for evaluating the reproductive period of these shrimps. These results can be used as a guide for fishery stocks management and monitoring.
DOI: 10.22008/fk2/oiajvo/dsaz8e
title: al.tif

description: SICE version: Cloud removed, PPGC, SNAP7, pySICEv1.4
DOI: 10.6084/m9.figshare.14283287.v1
title: Range expansion of Procambarus clarkii (Girard, 1852) (Decapoda: Cambaridae) in southern Brazil

description: Abstract The crayfish Procambarus clarkii (Girard, 1852) is a native species from the south-central region of the USA and northeastern Mexico that has been introduced to all continents except Antarctica and Oceania. In Brazil, P. clarkii has 17 established populations, all found in the southeastern region. The studied specimens were obtained at Ribeirão Claro municipality (23°11’38”S 49°45’28”W) in Paraná State, southern Brazil, in fish ponds from a private property near the Paranapanema River reservoir. Sampling was performed in September 2013 and March 2015, yielding a total of 13 crayfish specimens. Interviews with residents and workers at the sampling sites revealed that the aquarium trade could be an important introductory pathway, since the first crayfish observed had been released into nature shortly after being purchased at a pet shop in the neighboring state of São Paulo; even though current legislation forbids their importation, transportation, and commercialization.
DOI: 10.6084/m9.figshare.14283287
title: Range expansion of Procambarus clarkii (Girard, 1852) (Decapoda: Cambaridae) in southern Brazil

description: Abstract The crayfish Procambarus clarkii (Girard, 1852) is a native species from the south-central region of the USA and northeastern Mexico that has been introduced to all continents except Antarctica and Oceania. In Brazil, P. clarkii has 17 established populations, all found in the southeastern region. The studied specimens were obtained at Ribeirão Claro municipality (23°11’38”S 49°45’28”W) in Paraná State, southern Brazil, in fish ponds from a private property near the Paranapanema River reservoir. Sampling was performed in September 2013 and March 2015, yielding a total of 13 crayfish specimens. Interviews with residents and workers at the sampling sites revealed that the aquarium trade could be an important introductory pathway, since the first crayfish observed had been released into nature shortly after being purchased at a pet shop in the neighboring state of São Paulo; even though current legislation forbids their importation, transportation, and commercialization.
DOI: 10.6084/m9.figshare.14283288
title: Changes in cuticle structure during growth in two terrestrial isopods (Crustacea: Isopoda: Oniscidea)

description: Abstract Terrestrial isopods are a successful group of terrestrial crustaceans. Their exoskeletal cuticle has been studied in several species. However, it is not known whether the cuticle of these animals becomes thicker or how its structure changes as the animals grow. We aimed to determine the principles of upscaling of the exoskeletal cuticle during growth in the terrestrial isopods Armadillidium vulgare (Latreille, 1804) and Porcellio scaber Latreille, 1804 with scanning electron microscopy. The tergal cuticle becomes thicker with increasing body length. In A. vulgare, which rolls into a ball in defense against predators, the rate of increase of tergite thickness was greater than in P. scaber, which clings to the substrate when threatened. As the cuticles of both species become thicker, the proportion of the endocuticle in the cuticle increases. There is a strong correlation between cuticle thickness and the thickness of endocuticular lamellae. This indicates that in thicker cuticles, chitin-protein fibers in sequential layers change their orientation by a smaller angle. We found no significant differences in morphometric parameters between the cuticles of A. vulgare and P. scaber when controlling for cuticle thickness. This suggests that known differences in cuticle structure and composition between these two species may result from differences in cuticle thickness.
DOI: 10.6084/m9.figshare.14283288.v1
title: Changes in cuticle structure during growth in two terrestrial isopods (Crustacea: Isopoda: Oniscidea)

description: Abstract Terrestrial isopods are a successful group of terrestrial crustaceans. Their exoskeletal cuticle has been studied in several species. However, it is not known whether the cuticle of these animals becomes thicker or how its structure changes as the animals grow. We aimed to determine the principles of upscaling of the exoskeletal cuticle during growth in the terrestrial isopods Armadillidium vulgare (Latreille, 1804) and Porcellio scaber Latreille, 1804 with scanning electron microscopy. The tergal cuticle becomes thicker with increasing body length. In A. vulgare, which rolls into a ball in defense against predators, the rate of increase of tergite thickness was greater than in P. scaber, which clings to the substrate when threatened. As the cuticles of both species become thicker, the proportion of the endocuticle in the cuticle increases. There is a strong correlation between cuticle thickness and the thickness of endocuticular lamellae. This indicates that in thicker cuticles, chitin-protein fibers in sequential layers change their orientation by a smaller angle. We found no significant differences in morphometric parameters between the cuticles of A. vulgare and P. scaber when controlling for cuticle thickness. This suggests that known differences in cuticle structure and composition between these two species may result from differences in cuticle thickness.
DOI: 10.6084/m9.figshare.14283291
title: The crustacean collection at the National Institute of Mata Atlântica (INMA), former Professor Mello Leitão Biology Museum (MBML)

description: Abstract Zoological collections are fundamental repositories of biodiversity and have an important role in scientific dissemination. The National Institute of Mata Atlântica (INMA, previously called Professor Mello Leitão Biology Museum) founded by Augusto Ruschi is situated in Santa Teresa, Espírito Santo, Brazil, within the Atlantic Forest Biome, being a relevant source for the development of research in this habitat. The aim herein is to inventory the crustacean collection of INMA with a complete list of the species and their habitat. This collection is not yet digitized or available online. The collection totals 52 species in 41 genera, belonging to 26 families and comprises major crustacean groups, with a particular focus on Decapoda. All holdings are from Brazil. It consists of 443 specimens included in 131 records, representing mostly the Espírito Santo carcinofauna. Without online publication of the specimen data, the visibility and use of the collection would likely remain limited. Sourcing specimens through online databases will facilitate the production of guides and taxonomic training, and also more information can be passed on to the community as a whole. Thus, a proposal for future management of the Crustacea collection of INMA is to digitize the data through photos of the specimens and associated labels.
DOI: 10.6084/m9.figshare.14283291.v1
title: The crustacean collection at the National Institute of Mata Atlântica (INMA), former Professor Mello Leitão Biology Museum (MBML)

description: Abstract Zoological collections are fundamental repositories of biodiversity and have an important role in scientific dissemination. The National Institute of Mata Atlântica (INMA, previously called Professor Mello Leitão Biology Museum) founded by Augusto Ruschi is situated in Santa Teresa, Espírito Santo, Brazil, within the Atlantic Forest Biome, being a relevant source for the development of research in this habitat. The aim herein is to inventory the crustacean collection of INMA with a complete list of the species and their habitat. This collection is not yet digitized or available online. The collection totals 52 species in 41 genera, belonging to 26 families and comprises major crustacean groups, with a particular focus on Decapoda. All holdings are from Brazil. It consists of 443 specimens included in 131 records, representing mostly the Espírito Santo carcinofauna. Without online publication of the specimen data, the visibility and use of the collection would likely remain limited. Sourcing specimens through online databases will facilitate the production of guides and taxonomic training, and also more information can be passed on to the community as a whole. Thus, a proposal for future management of the Crustacea collection of INMA is to digitize the data through photos of the specimens and associated labels.
DOI: 10.6084/m9.figshare.14283294
title: Biometric relationships and sex ratio for red-spotted shrimp Farfantepenaeus brasiliensis (Latreille, 1817) (Decapoda, Penaeidae) from the coast of Sergipe, northeastern Brazil

description: Abstract The goal of this study was to estimate the biometric relationships and sex ratio for the red-spotted shrimp Farfantepenaeus brasiliensis (Latreille, 1817) from the coast of Sergipe, northeastern Brazil. A total of 132 specimens of F. brasiliensis were collected and analyzed (65 females and 67 males) from May 2015 to May 2016. The overall sex ratio did not differ significantly from 1:1. Female size ranged from 20.73-46.43 mm of carapace length (CL), whereas male size ranged from 20.75-32.47 mm CL. Females were larger (34.78±6.05 mm CL, 152.61±19.68 mm of total length (TL)) and heavier (27.45±11.12 g of wet weight (WW)) than males (27.07±2.56 mm CL, 123.77±11.37 mm TL and 14.48±3.98 g WW). All biometric relationships were different between females and males. Both TL vs CL and WW vs TL relationships indicated positive allometric growth. Data shown here correspond to an adult population exploited by local shrimp fleets and are an important contribution to the biological knowledge of this species, especially in northeastern Brazil, where there is no information available.
DOI: 10.6084/m9.figshare.14283285.v1
title: Evaluating two sampling methodologies for shrimp density and biomass estimates in streams

description: Abstract Freshwater shrimp can reach high biomasses, affecting ecosystem processes. It is important to define the most accurate methodology to estimate their densities and biomass. We studied two species of different sizes, Potimirim brasiliana Villalobos F., 1960 and Macrobrachium olfersii (Wiegmann, 1836), in three sites of a coastal stream in Ilha Grande, Rio de Janeiro, Brazil. We evaluated the efficiency of two infrequently used sampling methods: a depletion method using electrofishing, and a substrate method using benthic samplers. The methodologies provided different estimates, especially for M. olfersii, of density (electrofishing 1.27 ± 6.3 ind/m²; substrate sampling 0.1 ± 5.05 ind/m²) and biomass (electrofishing 1.66 ± 8.5 g/m²; substrate sampling 0.11 ± 1.16 g/m²). The median size of M. olfersii was higher for electrofishing, while the median size of P. brasiliana was higher for substrate sampling. Electrofishing is good at collecting bigger individuals that are not possible to catch with the substrate method and it samples a bigger area that includes many different microhabitats. The substrate method is cost-effective, especially for P. brasiliana, but by sampling a small area, its estimates can be highly affected by local heterogeneity. The substrate method is not recommended for M. olfersii, as it underestimated both its density and biomass.
DOI: 10.6084/m9.figshare.14283296
title: Individual growth and mortality of Rhithropanopeus harrisii (Decapoda: Panopeidae) in the estuarine region of Patos Lagoon, Southern Brazil

description: Abstract The present investigation aimed to estimate the individual growth and mortality of an invasive species found in the estuarine region of Patos Lagoon (Southern Brazil). For 20 months crabs were sampled, and in the laboratory specimens of Rhithropanopeus harrisii (Gould, 1841) were measured (carapace width, CW, and weight). Carapace width data was utilized for a modal progression analysis and to estimate the individual growth curve (von Bertalanffy growth model), and a size-converted catch curve. Von Bertalanffy parameters estimated were CW∞ = 16.92 mm and k = 1.28 year-1. Maximum longevity was estimated at 3.5 years. Instantaneous total mortality was estimated at 2.17 ± 0.30 year-1. It has been suggested that longevity may be explained by a low predation impact on R. harrisii, which, as a consequence, may lead to slow individual growth of this species in the estuarine region of Patos Lagoon.