دورية أكاديمية
Population structure of the red mangrove crab, Goniopsis cruentata (Decapoda: Grapsidae) under different fishery impacts: Implications for resource management ; Estructura de la población del cangrejo rojo de manglar, Goniopsis cruentata (Decapoda: Grapsidae) bajo diferentes impactos de pesca: Implicaciones para la gestión de los recursos.
| العنوان: | Population structure of the red mangrove crab, Goniopsis cruentata (Decapoda: Grapsidae) under different fishery impacts: Implications for resource management ; Estructura de la población del cangrejo rojo de manglar, Goniopsis cruentata (Decapoda: Grapsidae) bajo diferentes impactos de pesca: Implicaciones para la gestión de los recursos. |
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| المؤلفون: | Hirose, Gustavo L., Souza, Laize S., Silva, Sonja L. R., Alves, Douglas F. R., Negreiros-Fransozo, Maria Lucia |
| المصدر: | Revista de Biología Tropical; Vol. 63 No. 2 (2015): Volume 63 – Regular number 2 – June 2015; 443-457 ; Revista de Biología Tropical; Vol. 63 Núm. 2 (2015): Volumen 63 – Número regular 2 – Junio 2015; 443-457 ; Revista Biología Tropical; Vol. 63 N.º 2 (2015): Volumen 63 – Número regular 2 – Junio 2015; 443-457 ; 2215-2075 ; 0034-7744 ; 10.15517/rbt.v63i2 |
| بيانات النشر: | Universidad de Costa Rica |
| سنة النشر: | 2015 |
| المجموعة: | Portal de revistas académicas de la Universidad de Costa Rica |
| مصطلحات موضوعية: | body size, fecundity, Grapsidae, management plan, overfishing, fecundidad, plan de manejo, sobrepesca, tamaño corporal |
| الوصف: | The red mangrove crab, Goniopsis cruentata, influences the recruitment and composition of plant species in the mangrove ecosystem and it is an important fishery resource. Nevertheless, no current management and conservation plans are available for this species for the Brazilian coast. This investigation evaluated the population structure and reproductive biology in populations of G. cruentata under contrasting fishery pressures. The sampling program was carried out in two mangroves, Vaza-Barris and Sergipe River, from January through December 2011. Crabs from both mangroves were randomly collected by a professional fisherman during daytime low tide periods, using a fishing rod baited with pieces of a locally abundant gastropod, Pugilina morio, during 20min/area (catch per unit effort). Monthly measurements of air, sediment surface layer and water temperatures were obtained with a digital thermometer and salinity with an optical refractometer. Both crab populations were compared concerning their abundance, body size, sex ratio, size at onset of sexual maturity and fecundity (FI). Abiotic factors (air, water and mud temperature; and salinity) showed no significant differences between sampling localities. A total of 4 370 crabs were sampled, 2 829 from the Sergipe River and 1 541 from the Vaza-Barris River. The abundance and body size of crabs were compared between mangroves, and statistically significant differences were found. The sex ratio for both populations differed from the expected 1:1 ratio, and a significant deviation in favor of juvenile males was obtained, while adults showed a bias toward females. The estimated size at onset of sexual maturity for both sexes was similar in both populations. However, the populations differed significantly in the number and volume of eggs: a higher FI was obtained in females from the Sergipe River, while a higher egg volume was observed in females from the Vaza-Barris River mangrove. These results indicated a tendency to decrease the body size, the abundance of crabs and ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf; text/html |
| اللغة: | English |
| العلاقة: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/15432/18722Test; https://revistas.ucr.ac.cr/index.php/rbt/article/view/15432/18723Test; https://revistas.ucr.ac.cr/index.php/rbt/article/view/15432Test |
| DOI: | 10.15517/rbt.v63i2.15432 |
| الإتاحة: | https://doi.org/10.15517/rbt.v63i2.15432Test https://doi.org/10.15517/rbt.v63i2Test https://revistas.ucr.ac.cr/index.php/rbt/article/view/15432Test |
| رقم الانضمام: | edsbas.D8B17AAE |
| قاعدة البيانات: | BASE |
| DOI: | 10.15517/rbt.v63i2.15432 |
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