Abstract
Panulirus penicillatus (Olivier, 1791) (Decapoda: Palinuridae) is the most common spiny lobster in the Red Sea and is widely distributed in the Indian and Pacific Oceans. Lobsters (n=377) were collected on four occasions during 1986 on the coral reef at Dahab, Sinai, Egypt. Average size of the collected individuals was 70.5±24.6 mm carapace length (CL) for males and 63.2±15.9 mm CL for females. The sex ratio was 1:1.64 males to females. Length increment per molt was inversely correlated with size and ranged from 2.1 mm per molt in the 40 to 50 mm CL size class to less than 1 mm in the 60 to 70 mm CL size class. Average intermolt period was ca. 136 d for all size classes. The relationship between carapace length and body weight was expressed by the equation:W b=6.43 × 10−4 × (CL)2.89.P. penicillatus from Dahab differ in size, sex ratio and growth rate compared to other palinurid populations throughout their range. This might represent the effect of isolation and location at the edge of the geographical range for this species. It may also indicate an adaptation to their unique habitat in the coral reef in comparison to other palinurid species.
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Communicated by O. Kinne, Oldendorf/Luhe
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Plaut, I., Fishelson, L. Population structure and growth in captivity of the spiny lobsterPanulirus penicillatus from Dahab, Gulf of Aqaba, Red Sea. Mar. Biol. 111, 467–472 (1991). https://doi.org/10.1007/BF01319420
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DOI: https://doi.org/10.1007/BF01319420