A comparative study on the relative growth of spiny lobster (Panulirus sp.) in the Sea of Southeast Sulawesi, Indonesia
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The study aimed to examine variations in sex ratio, the relationship between weight (W) and carapace length (CL), growth patterns, and condition factors (CF) of Panulirus sp. collected from Southeast Sulawesi waters using bottom gillnets, set nets, and bottom traps. Spiny lobster species and sex were identified through external morphological characteristics, recorded, counted, and measured for TL, and weighed (W). The sex ratio was calculated as the proportion of males to females in the sample and analyzed using the chi-square test. The W-TL relationship was analyzed using the formula LogW = Log a + b × LogTL, where “b” indicates growth patterns. As all spiny lobsters exhibited a negative allometric growth pattern, the health index was analyzed using the “relative CF”. The results identified four spiny lobster species of Panulirus ornatus , Panulirus homarus , Panulirus versicolor , and Panulirus longipes , with P. longipes being the most widespread and dominant species in Wakatobi and North Buton waters. Although the sex ratio varied by location, it was not significantly different, except for P. longipes in Wakatobi waters. All W-TL relationships had strong correlation coefficients. However, the growth patterns were all negatively allometric, and all health indexes, indicated by CF, were quite similar. This implies that the growth rate in total length was more dominant compared to the increase in weight.
Abstract
The study aimed to examine variations in sex ratio, the relationship between weight (W) and carapace length (CL), growth patterns, and condition factors (CF) of Panulirus sp. collected from Southeast Sulawesi waters using bottom gillnets, set nets, and bottom traps. Spiny lobster species and sex were identified through external morphological characteristics, recorded, counted, and measured for TL, and weighed (W). The sex ratio was calculated as the proportion of males to females in the sample and analyzed using the chi-square test. The W-TL relationship was analyzed using the formula LogW = Log a + b × LogTL, where “b” indicates growth patterns. As all spiny lobsters exhibited a negative allometric growth pattern, the health index was analyzed using the “relative CF”. The results identified four spiny lobster species of Panulirus ornatus , Panulirus homarus , Panulirus versicolor , and Panulirus longipes , with P. longipes being the most widespread and dominant species in Wakatobi and North Buton waters. Although the sex ratio varied by location, it was not significantly different, except for P. longipes in Wakatobi waters. All W-TL relationships had strong correlation coefficients. However, the growth patterns were all negatively allometric, and all health indexes, indicated by CF, were quite similar. This implies that the growth rate in total length was more dominant compared to the increase in weight.