Distribution and Population Structure of Callinectes danae (Decapoda: Portunidae) in a Tropical Brazilian Estuary

Sforza, Roberto; Nalesso, Rosebel Cunha; Joyeux, Jean‐Christophe

doi:10.1651/09-3223.1

Cited by 32 publications

(22 citation statements)

References 33 publications

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“…Male-biased selectivity in exploited species such as U. cordatus can also change the sex ratio (Fenberg & Roy, 2007). According to Diele et al (2005), areas with a longer history of exploitation have a higher proportion of females, and this deviation may indicate that the population has been overfished (Conti & Nalesso, 2010;Sforza et al, 2010). The results obtained here suggest no evidence of overexploitation.…”

Section: Discussionmentioning

confidence: 54%

Biología poblacional del cangrejo de manglar <i>Ucides cordatus</i> (Decapoda: Ucididae) en un estuario tropical semiárido

Leite

Rezende

Silva

2013

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Biología poblacional del cangrejo de manglar Ucides cordatus (Decapoda: Ucididae) en un estuario tropical semiárido. The mangrove crab Ucides cordatus is an important resource of estuarine regions along the Brazilian coast. U. cordatus is distributed from Florida, USA, to the coast of Santa Catarina, Brazil. The species plays an important role in processing leaf litter in the mangroves, which optimizes the processes of energy transfer and nutrient cycling, and is considered a keystone species in the ecosystem. Population declines have been reported in different parts of the Brazilian coast. in the present study we evaluated aspects of the population structure, sex ratio and size at morphological sexual maturity. We analyzed 977 specimens collected monthly over 24 months (2010)(2011)(2012), in a mangrove of the Jaguaribe River, in the municipality of Aracati on the East coast of Ceará state, Northeastern Brazil. The study area has a mild semiarid tropical climate, with mean temperatures between 26 and 28 o C. The area is located within the eco-region of the semiarid Northeast coast, where mangroves occur in small areas and estuaries are affected by mesomareal regimes. The population structure was evaluated by the frequency distribution of size classes in each month, and the overall sex ratio was analyzed using the chi-square test. Size at morphological sexual maturity was estimated based on the allometry of the cheliped of the males and the abdomen width of the females, using the program REGRANS. The size-frequency distribution was unimodal in both sexes. The overall sex ratio (M: F) (1:0.6) was significantly different from 1:1. Analysis of the sex ratio by size class showed that the proportion of males increased significantly from size class 55-60mm upward, and this pattern persisted in the larger size classes. in the smaller size classes the sex ratio did not differ from 1:1. The size at morphological sexual maturity was estimated at a carapace width (CW) of 52mm and 45mm for males and females, respectively. Analysis of the population parameters indicated that the population of U. cordatus in the Jaguaribe River mangrove is stable. However, constant monitoring of the population is required to detect any changes in the population attributes that may affect this stability. Rev. Biol. Trop. 61 (4): 1721-1735. Epub 2013 December 01.Key words: allometry, population structure, fishery management, sex ratio, size at sexual maturity.The study of population biology furthers our understanding of the ecological stability of a species in a particular habitat (Castiglioni et al., 2006). Population parameters of brachyuran crabs have been investigated by analyzing the distribution of individuals in size class, sex ratio, range in size at sexual maturity, reproductive cycle, fecundity, and juvenile recruitment (Thurman, 1985;Díaz & Conde, 1989;Flores & Negreiros-Fransozo, 1999;Conde et al., 2000;Cobo, 2005;Litulo, 2005;Benetti et al., 2007;Bezerra & Mathews-Cascon, 2007;Kassuga et al., 2008;Gregati & Negreiros-Frans...

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Section: Discussionmentioning

confidence: 54%

Biología poblacional del cangrejo de manglar <i>Ucides cordatus</i> (Decapoda: Ucididae) en un estuario tropical semiárido

Leite

Rezende

Silva

2013

RBT

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“…These individuals were ovigerous females and adult females that probably migrated to deeper places where salinity is higher, to release their larvae. Larval dispersal is easier in deeper waters, due to the action of currents and winds (Hines et al 1987;Chacur & Negreiros-Fransozo 2001;Sforza et al 2010). After the post-embryonic development, the larvae in a more advanced stage of development (Megalopa) return to shallow areas with lower salinity to complete their life cycles (Chacur & Negreiros-Fransozo 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Strong habitat partitioning was found for C. danae: while males and juveniles are collected mostly at the inner estuary, adult females are found in the entire bay, and ovigerous females occur almost exclusively at deeper layers where salinity is higher (Sforza et al 2010).…”

Section: Introductionmentioning

confidence: 95%

Environmental factors modulating the abundance and distribution of Callinectes danae (Decapoda: Portunidae) from two areas of the southeastern coast of Brazil

et al. 2014

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Abstract:The distribution and abundance of marine organisms are directly or indirectly a function of biotic and abiotic features such as sediment and water properties. In this study we analyzed the spatial and temporal distribution of Callinectes danae in two distinct littoral areas of the northern coast of the State of São Paulo, Brazil and associated them with local geomorphologic features and environmental factors. We collected specimens on a monthly basis, from July 2001 to June 2003, using a fishing boat equipped with double-rig net, in two locations: Ubatuba (UBA) and Caraguatatuba (CAR). Collecting was carried out in seven transects with different depths, which were further subdivided into two regions: bay region (5, 10, 15 and 20 m deep); and inner shelf region (25, 30 and 35 m deep). Samples from different periods and transects differed significantly in abundance. A positive correlation was found between the abundance of C. danae and the following parameters: temperature at the bottom, organic matter content and Phi (grain diameter). By contrast, a negative correlation was established between specimen abundance and salinity at the bottom. The total abundance was highest in 5 m deep transects in both regions. Summer was the season when individuals were least abundant in both areas. We concluded that the spatial and temporal distribution of C. danae are determined by a set of environmental factors and not just by one single factor.

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“…Migration of C. sapidus females to high-salinity waters tends to improve their reproductive success, because eggs and larvae will be subject to less fluctuation of physical and chemical parameters and also to lower predation pressure (Hines et al 1987). Juvenile and adult males of C. danae may concentrate in low-salinity areas in bays, whereas females prefer more saline waters (Sforza et al 2010). This partial sexual segregation is associated with the reproductive cycle of swimming crabs, and was mentioned for the first time by Norse (1977) in his study on the zoogeographical distributions of members of the genus Callinectes.…”

Section: Axismentioning

confidence: 99%

“…La migración de hembras de C. sapidus hacia aguas de alta salinidad tiende a mejorar su éxito reproductivo, ya que los huevos y las larvas están sujetas a una menor fluctuación de los parámetros físicos y químicos, así como a una menor presión de depredación (Hines et al 1987). Los machos jóvenes y adultos de C. danae pueden concentrarse en zonas de las bahías con baja salinidad, mientras que las hembras prefieren aguas de mayor salinidad (Sforza et al 2010). Esta segregación sexual parcial se asocia con el ciclo reproductivo de cangrejos nadadores, y fue mencionado por primera vez por Norse (1977) en su estudio de las distribuciones zoogeográficas de los miembros del género Callinectes.…”

Section: Scores Of Demographic Groupsunclassified

Ontogenetic distribution of Callinectes ornatus (Decapoda, Portunoidea) in southeastern Brazil

et al. 2013

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The spatial and seasonal distribution of different demographic groups of the swimming crab Callinectes ornatus was analyzed with respect to its population biology in three bays (Ubatumirim, Ubatuba, and Mar Virado) in southeastern Brazil. In each bay, monthly sampling was performed during two years along six transects, established at 5, 10, 15, and 20 m depth (parallel to the beach line), in a wave-sheltered area (7.5 m depth), and at an exposed site (10 m depth). Total abundance of crabs was similar among the bays. The presence of immature individuals, adult females, and breeding females was positively correlated with the bottom and surface temperatures, whereas adult males showed an opposite trend with respect to these factors. Immature and smaller individuals were most abundant along the sheltered and shallower transects. Males were more abundant along the shallower transects, and females at 15 and 20 m. This study revealed that different demographic groups occupy the habitat in different ways, according to local features. In general, southeastern Brazil offers a range of conditions that favor reproduction and consequently the maintenance and growth of the local population of C. ornatus, contributing to the relatively high abundance of the species in this coastal area.

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Distribution and Population Structure of Callinectes danae (Decapoda: Portunidae) in a Tropical Brazilian Estuary

Cited by 32 publications

References 33 publications

Biología poblacional del cangrejo de manglar <i>Ucides cordatus</i> (Decapoda: Ucididae) en un estuario tropical semiárido

Biología poblacional del cangrejo de manglar <i>Ucides cordatus</i> (Decapoda: Ucididae) en un estuario tropical semiárido

Environmental factors modulating the abundance and distribution of Callinectes danae (Decapoda: Portunidae) from two areas of the southeastern coast of Brazil

Ontogenetic distribution of Callinectes ornatus (Decapoda, Portunoidea) in southeastern Brazil

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