Biological aspects of the blue swimming crab, Portunus segnis (Brachyura: Decapoda: Portunidae), inhabiting the Suez Canal Lakes, Egypt | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 50, Volume 26, Issue 5, September and October 2022, Page 911-937 PDF (1.04 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2022.265456 | ||||
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| Author | ||||
| Arwa Abd-Allah et al. | ||||
| Abstract | ||||
| Portunus segnis (Forskål, 1775) is an economically important crab species in Egypt; however, its yields have decreased in recent years. In this study, the morphometric characteristics and organ indices were analyzed to obtain baseline information about the population structure and sexual maturity of this species. Specimens were monthly collected from Timsah and Bitter Lakes, along the Suez Canal. A 1.4: 1 and 0.9: 1 male: female sex ratio was recorded in the Timsah and Bitter Lakes, respectively. Fifty percent of females were mature at a CW of 79 and 87 mm in Timsah and Bitter Lakes, respectively. Spawning peaked in the lakes under study in September (32%) and July (25%), respectively, while the smallest and largest berried female crabs were 73.5 mm CW, 119.3 mm CW and 86 mm CW, 121.9 mm CW in Timsah and Bitter Lakes, respectively. The gathered information is expected to help improve the sustainability of this crab fishery in the Suez Canal area. | ||||
| Keywords | ||||
| Portunus segnis; Biological aspect; Morphometric; Spawning; Sex ratio; Suez Canal Lakes | ||||
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