Biology and fishery of the arched box crab calappa convexa de saussure (crustacea, brachyura, calappidae) in the southeastern gulf of California, Mexico
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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2001
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| _version_ | 1876475367657570304 |
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| author | Manuel Ayón Parente |
| author_facet | Manuel Ayón Parente |
| contents | Biology and fishery of the arched box crab calappa convexa de saussure (crustacea, brachyura, calappidae) in the southeastern gulf of California, Mexico Manuel Ayón Parente Michel E. Hendrickx Ciencias de la Tierra catch biology abundance distribution Calappa convexa The arched box crab (Calappa convexa) is commonly caught in gillnets as by-catch of the spinylobster (Panulirus spp.) fishery in southern Sinaloa, Mexico, a locally exploited fishing resource. Crabswere sampled monthly from May 1998 to April 1999 and a total of 274 specimens (132 males and 142females) were captured. The distribution of the resource was homogeneous (present in 72% of thesamples) throughout the sampling area. The overall sex ratio (female:male) was 1:0.92 (χ2 > 0.05). Thecapture per unit effort (CPUE) varied from 0.81 g/100m2/h to 9.10 g/100m2/h. Maximum catch wasobtained in June while minimum catches occurred in December and March. The CPUE values differedsignificantly (ANOVA P < 0.05) among the months of sampling. Crabs were caught on sand, rock andboulders, with 43% of the CPUE corresponding to rocky substrate. Mean size, based on carapace length(CL), was 72.5 ± 5.8 mm for males and 74.5 ± 7.2 mm for females. Individual size frequency distributionwas unimodal and normal in males and unimodal and not normal in females, with the largest numberoccurring in spring (107) and winter (73). Reproduction occurred throughout the year, with peaks fromApril to August. Females reached sexual maturity at an estimated size of 75 mm (CL50) and carried anaverage of 638,885 eggs. The mean size differed significantly between females (75.7 mm CL,SD = 7.3 mm) and males (72.8 mm CL, SD = 5.8 mm) (P < 0.05). The modal classes displayed a slightseasonal displacement (spring to winter) towards larger sizes. Analysis of the carapace width:lengthrelationship shows variation during male and female development, specifically, in larger sizes(> 75 mm CL), females were narrower while the opposite occurred in males. Left and right chelaereached a combined fresh weight of 100 g, in males of about 75.0 mm CL, while in females this weightwas reached at 79.0 mm CL. 2001 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48027403 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.27 |
| format | Artículo científico |
| id | redalyc_48027403 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Autónoma de Baja California |
| spellingShingle | Biology and fishery of the arched box crab calappa convexa de saussure (crustacea, brachyura, calappidae) in the southeastern gulf of California, Mexico Manuel Ayón Parente Ciencias de la Tierra catch biology abundance distribution Calappa convexa Biology and fishery of the arched box crab calappa convexa de saussure (crustacea, brachyura, calappidae) in the southeastern gulf of California, Mexico Manuel Ayón Parente Michel E. Hendrickx Ciencias de la Tierra catch biology abundance distribution Calappa convexa The arched box crab (Calappa convexa) is commonly caught in gillnets as by-catch of the spinylobster (Panulirus spp.) fishery in southern Sinaloa, Mexico, a locally exploited fishing resource. Crabswere sampled monthly from May 1998 to April 1999 and a total of 274 specimens (132 males and 142females) were captured. The distribution of the resource was homogeneous (present in 72% of thesamples) throughout the sampling area. The overall sex ratio (female:male) was 1:0.92 (χ2 > 0.05). Thecapture per unit effort (CPUE) varied from 0.81 g/100m2/h to 9.10 g/100m2/h. Maximum catch wasobtained in June while minimum catches occurred in December and March. The CPUE values differedsignificantly (ANOVA P < 0.05) among the months of sampling. Crabs were caught on sand, rock andboulders, with 43% of the CPUE corresponding to rocky substrate. Mean size, based on carapace length(CL), was 72.5 ± 5.8 mm for males and 74.5 ± 7.2 mm for females. Individual size frequency distributionwas unimodal and normal in males and unimodal and not normal in females, with the largest numberoccurring in spring (107) and winter (73). Reproduction occurred throughout the year, with peaks fromApril to August. Females reached sexual maturity at an estimated size of 75 mm (CL50) and carried anaverage of 638,885 eggs. The mean size differed significantly between females (75.7 mm CL,SD = 7.3 mm) and males (72.8 mm CL, SD = 5.8 mm) (P < 0.05). The modal classes displayed a slightseasonal displacement (spring to winter) towards larger sizes. Analysis of the carapace width:lengthrelationship shows variation during male and female development, specifically, in larger sizes(> 75 mm CL), females were narrower while the opposite occurred in males. Left and right chelaereached a combined fresh weight of 100 g, in males of about 75.0 mm CL, while in females this weightwas reached at 79.0 mm CL. 2001 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48027403 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.27 |
| title | Biology and fishery of the arched box crab calappa convexa de saussure (crustacea, brachyura, calappidae) in the southeastern gulf of California, Mexico |
| topic | Ciencias de la Tierra catch biology abundance distribution Calappa convexa |
| url | https://www.redalyc.org/articulo.oa?id=48027403 |