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Stable isotope assessment of whale sharks across two ocean basins: Gulf of California and the Mexican Caribbean
Journal of Experimental Marine Biology and Ecology ( IF 2 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.jembe.2020.151359
D.A. Whitehead , D. Murillo-Cisneros , F.R. Elorriaga-Verplancken , A. Hacohen-Domené , R. De La Parra , R. Gonzalez-Armas , F. Galvan-Magaña

Abstract The use of stable isotope analysis has proven to be a reliable approach to investigate the diet of whale sharks in their natural habitat. A total of 63 whale sharks (50♂, 13♀) were sampled from the two localities (La Paz Bay n = 32, Yucatan Peninsula n = 31) in Mexico. Isotopic signatures differed greatly between both localities with mean values for δ15N in La Paz Bay (13.5 ± 0.1‰) being considerably higher than the Yucatan Peninsula (8.3 ± 0.1‰). As for δ13C both localities represented similar means (La Paz Bay − 15.4 ± 0.5‰, Yucatan Peninsula − 14.2 ± 0.1‰). A Mann-Whitney U test revealed no significant differences between sexes at localities for δ15N (La Paz Bay, p > .05, Yucatan Peninsula, P > .05) and also for δ13C (La Paz Bay, p > .05, Yucatan Peninsula, P > .05). Between size groups of individuals ( 6 m), significant differences were observed in the δ15N for whale sharks solely from La Paz Bay (p

中文翻译:

两个海洋盆地中鲸鲨的稳定同位素评估:加利福尼亚湾和墨西哥加勒比海

摘要 使用稳定同位素分析已被证明是研究鲸鲨在其自然栖息地的饮食的可靠方法。从墨西哥的两个地方(拉巴斯湾 n = 32,尤卡坦半岛 n = 31)共采集了 63 条鲸鲨(50♂,13♀)。两个地区的同位素特征差异很大,拉巴斯湾的 δ15N 平均值 (13.5 ± 0.1‰) 远高于尤卡坦半岛 (8.3 ± 0.1‰)。至于 δ13C,两个地区的平均值相似(拉巴斯湾 - 15.4 ± 0.5‰,尤卡坦半岛 - 14.2 ± 0.1‰)。Mann-Whitney U 检验显示,δ15N(拉巴斯湾,p > .05,尤卡坦半岛,P > .05)和 δ13C(拉巴斯湾,p > .05,尤卡坦半岛)在不同地区性别之间没有显着差异, P > .05)。在个体大小组之间 (6 m),
更新日期:2020-06-01
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