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Biometric characteristics of the wild population of sea urchin Paracentrotus lividus (Lamarck, 1816) on the Tunisian coast
Thalassas: An International Journal of Marine Sciences ( IF 0.7 ) Pub Date : 2021-04-17 , DOI: 10.1007/s41208-021-00301-8
F. Sellem , B. Bouhaouala-Zahar

The present study was conducted to provide biometric data of the edible sea urchin Paracentrotus lividus along the Tunisian coastline where thirteen marine localities were selected randomly. A total of 653 individuals were collected and their metric and weight measurements were recorded. The size distribution of the different samples was determined and relative growth expressions were deduced. Data analysis showed that all localities’ samples of the wild population were dominated by one-size class, except Port Prince and Haouaria. Interestingly, only diameter-height relationships (D-H) were different between the geographical localities. Diameter-weight relationships (D-TW and D-TWTE) revealed a significant negative growth for all the localities, with the exception of Gammarth which showed positive growth for total weight (D-TW). Moreover, the multivariable analysis revealed divergences and/or similarities between metric and weight variables. Altogether, data highlights the inter-population discrimination with respect to geographic localization and clear segregation between the northern and the eastern localities demonstrated the plasticity of the species.



中文翻译:

突尼斯海岸海胆Paracentrotus lividus(Lamarck,1816)的野生种群的生物特征

进行本研究以提供食用海胆Paracentrotus lividus的生物特征数据沿突尼斯海岸线随机选择了13个海洋地点。总共收集了653个人,并记录了他们的度量和体重测量值。确定了不同样品的尺寸分布,并推导了相对生长表达。数据分析表明,除王子港和豪阿里亚岛外,所有地方的野生种群样本均以单一规模的类为主。有趣的是,只有地理高度之间的直径高度关系(DH)有所不同。直径重量关系(D-TW和D-TWTE)显示出所有地区的显着负增长,但Gammarth除外(总重量(D-TW)呈正增长)。此外,多变量分析显示了指标变量和权重变量之间的差异和/或相似性。

更新日期:2021-04-18
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