Reproductive migration and population dynamics of the blue crab<i>Callinectes danae</i>in an estuary in southeastern Brazil

Sant’Anna, Bruno Sampaio; Turra, Alexander; Zara, Fernando José

doi:10.1080/17451000.2011.637563

Cited by 20 publications

(27 citation statements)

References 25 publications

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“…In the present study, the data suggest that the São Vicente estuary-bay complex is the main habitat of juveniles, which explains the deviation toward lower individual sizes as well as the trend toward a bimodal distribution for males. The high proportion of juveniles helps to explain the 1:1 sex ratio, since most of the population was sexually immature, and females do not migrate as described for other Callinectes species (AGUILAR et al 2005, SANT'ANNA et al 2012a.…”

Section: Discussionmentioning

confidence: 99%

“…Larger blue crabs behave aggressively toward conspecifics (CLARK et al 1999, REICHMUTH et al 2011, and might also be aggressive toward other species. We speculate that the presence of the other, larger Callinectes species such as C. danae (SANT'ANNA et al 2012a) in the estuary-bay complex may influence the distribution of C. ornatus, combined with the euryhalinity characteristic of the species. Further studies on competition for resources such as territory use or food are needed to test this hypothesis.…”

Section: Discussionmentioning

confidence: 99%

“…However, this may not in itself explain the low number of adults of C. ornatus in the bay area, where salinities are higher. This species is usually smaller than C. sapidus or C. danae (BUCHANAN & STONER 1988), and the large number of adults of C. danae in the region (SANT'ANNA et al 2012a) may lead to agonistic relationships with C. ornatus. NORSE (1978) found that C. ornatus living in areas without other, larger species of Callinectes are more tolerant to hyposaline conditions than are ZOOLOGIA 31 (4): 329-336, August, 2014…”

Section: Discussionmentioning

confidence: 99%

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Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil

Watanabe

Sant’Anna

Hattori

et al. 2014

Zoologia (Curitiba)

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil

Watanabe

Sant’Anna

Hattori

et al. 2014

Zoologia (Curitiba)

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“…The present study showed a significant monthly frequency of males and females with developed gonads over the two years of study, indicating that these bays seem to meet the nutritional needs of the species. Other studies have also found a continuous reproductive pattern, using the same methodology (Branco and Masunari, 2000;Keunecke et al, 2012;Sant'Anna et al, 2012;Marochi et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, reproductive females may have different habitat preferences than the rest of the population, and may occur in other locations and not be present in samples from the area chosen for collection. Studies of the reproductive periodicity of Callinectes danae Smith, 1869 on the Brazilian coast include those of Costa and Negreiros-Fransozo (1998), which did not report the sampling depths, and Branco and Masunari (2000), Keunecke et al (2012), Sant'Anna et al (2012) and Marochi et al (2013), which covered only estuarine areas.…”

Section: Introductionmentioning

confidence: 99%

Reproductive features of the swimming crab Callinectes danae(Crustacea, Portunoidea) on the subtropical coast of Brazil: a sampling outside the estuary

et al. 2015

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The life cycle of the crab Callinectes danae is estuarine-dependent, and studies on aspects of their biology should also cover marine areas. The present study investigated the sexual maturity, as well as habitat preference by adults in different gonadal stages, and the crabs' reproductive periodicity outside the estuary. Three bays on the subtropical southeastern coast of Brazil were sampled monthly for two years. For each bay, six transects were established, four of them parallel to the beach line (5, 10, 15 and 20 m depth), as well as one transect in an exposed area, and another sheltered from the action of waves. The results showed that the pattern of spatio-temporal distribution of adults C. danae was similar in three bays, although the highest abundance was found in Ubatumirim. Females with developed gonads/ovigerous females were found in greater abundance than females with rudimentary/developing gonads, mainly in deeper transects. Although the areas sampled have different environmental characteristics, the reproductive pattern of the species did not change, showing continuous reproduction throughout, with more abundance of reproductive females on spring and summer. Males reached maturity at larger sizes than females in all three bays.Keywords: blue crab, change in habitat use, reproductive activity, sexual maturity.Características reprodutivas do siri Callinectes danae (Crustacea, Portunoidea) na região subtropical da costa do Brasil: uma amostragem fora do estuário ResumoO siri Callinectes danae é estuarino dependente em seu ciclo de vida, sendo que os estudos que levantam informações sobre os aspectos da sua biologia devem também abranger regiões marinhas. Assim, o presente estudo teve como objetivo investigar a maturidade sexual, bem como a preferência ocupacional por adultos em diferentes estágios gonadais e sua periodicidade reprodutiva fora da região estuarina. Para tanto, três enseadas da porção subtropical do litoral sudeste brasileiro foram amostradas mensalmente, durante dois anos. Para cada enseada, seis transectos foram estabelecidos, quatro deles paralelos à linha de praia (5, 10, 15 e 20m de profundidade), um transecto exposto e outro abrigado à ação de ondas. Os resultados mostraram que o padrão de distribuição espaço-temporal de adultos de C. danae foi similar nas três enseadas, embora uma maior abundância tenha sido encontrada em Ubatumirim. Fêmeas ovígeras e com gônadas desenvolvidas foram encontradas em maior abundância que fêmeas com gônadas rudimentares e em desenvolvimento, principalmente nos transectos mais profundos. Apesar das regiões amostradas possuírem características ambientais diferenciadas, o padrão reprodutivo da espécie não sofreu alterações, apresentando reprodução contínua, com maior abundância de fêmeas reprodutivas na primavera e verão. Machos atingiram maturidade em tamanhos maiores que as fêmeas nas três enseadas.Palavras-chave: siri azul, alterações na ocupação do hábitat, atividade reprodutiva, maturidade sexual.

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A systematic evaluation on the relationship between hypo‐osmoregulation and hyper‐osmoregulation in decapods of different habitats

Bozza,

Freire,

Prodocimo

2023

J Exp Zool Pt A

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Decapods occupy all aquatic, and terrestrial and semi‐terrestrial environments. According to their osmoregulatory capacity, they can be osmoconformers or osmoregulators (hypo or hyperegulators). The goal of this study is to gather data available in the literature for aquatic decapods and verify if the rare hyporegulatory capacity of decapods is associated with hyper‐regulatory capacity. The metric used to quantify osmoregulation was the osmotic capacity (OC), the gradient between external and internal (hemolymph) osmolalities. We employ phylogenetic comparative methods using 83 species of decapods to test the correlation between hyper OC and hypo OC, beyond the ancestral state for osmolality habitat, which was used to reconstruct the colonization route. Our analysis showed a phylogenetic signal for habitat osmolality, hyper OC and hypo OC, suggesting that hyper‐hyporegulators decapods occupy similar habitats and show similar hyper and hyporegulatory capacities. Our findings reveal that all hyper‐hyporegulators decapods (mainly shrimps and crabs) originated in estuarine waters. Hyper OC and hypo OC are correlated in decapods, suggesting correlated evolution. The analysis showed that species which inhabit environments with intense salinity variation such as estuaries, supratidal and mangrove habitats, all undergo selective pressure to acquire efficient hyper‐hyporegulatory mechanisms, aided by low permeabilities. Therefore, hyporegulation can be observed in any colonization route that passes through environments with extreme variations in salinity, such as estuaries or brackish water.

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Reproductive migration and population dynamics of the blue crabCallinectes danaein an estuary in southeastern Brazil

Cited by 20 publications

References 25 publications

Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil

Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil

Reproductive features of the swimming crab Callinectes danae(Crustacea, Portunoidea) on the subtropical coast of Brazil: a sampling outside the estuary

A systematic evaluation on the relationship between hypo‐osmoregulation and hyper‐osmoregulation in decapods of different habitats

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