Stable isotopes provide evidence of a trophic shift in the lesser spotted dogfish Scyliorhinus canicula from the Central Tyrrhenian Sea

IF 2.3 3区环境科学与生态学 Q1 MARINE & FRESHWATER BIOLOGY

Mediterranean Marine Science Pub Date : 2023-01-23 DOI:10.12681/mms.27391

F. Reinero, E. E. BECERRIL-GARCÍA, Fernando R. Elorriagaverplancken, F. N. Melo-Barrera, Maria Ludovica TORALDO-SERRA, G. Giglio, P. Micarelli, S. Tripepi, F. Galván‐Magaña, E. Sperone

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引用次数: 2

Abstract

Stable isotopes (δ13C and δ15N) were analysed in vertebrae of Scyliorhinus canicula (n=40; 13 males, 27 females) from the central Tyrrhenian Sea to explore a potential trophic shift in relation to sex and maturity condition. Isotopic values were obtained from the centre and the periphery of the vertebra of each individual to test for the effect of maturity condition. The values of δ13C and δ15N showed significant differences between the immature and mature state of the individuals analysed (U’=1392, P<0.0001 for δ13C; U’=1385, P<0.0001 for δ15N). Differences in values of δ15N demonstrated a trophic shift during maturation progress of S. canicula. The peripheral vertebral part, corresponding to the mature state of each individual, showed higher values of δ15N (mean 5.41‰ SD±1.29‰), compared with the lower values of δ15N (mean 2.78‰ SD±1.52‰) observed in the central vertebral part related to the immature state. In contrast, the isotopic signature of δ13C was lower in the vertebral centra, and thus related to areas less enriched in C13 (mean -22.56‰ SD±1.26‰) in comparison with the vertebral periphery (mean -20.03‰ SD±1.34‰) linked to more productive environments. No significant differences in δ13C or for δ15N values were observed between sexes.

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稳定同位素提供了来自中部第勒尼安海的小斑点角鲨(Scyliorhinus canicula)营养转移的证据

分析了来自第勒尼安海中部的犬科圆尾鹬（n=40；13只雄性，27只雌性）脊椎中的稳定同位素（δ13C和δ15N），以探索与性别和成熟条件相关的潜在营养变化。从每个个体的脊椎中心和外围获得同位素值，以测试成熟条件的影响。δ13C和δ15N的值在所分析个体的未成熟和成熟状态之间显示出显著差异（U’=1392，δ13C的P＜0.0001；U’=1385，δ15N为P＜0.00001）。δ15N值的差异表明，在S.canicula的成熟过程中，营养发生了变化。对应于每个个体成熟状态的椎体外周部分显示出较高的δ15N值（平均5.41‰SD±1.29‰），而与未成熟状态相关的椎体中央部分观察到的较低值（平均2.78‰SD±1.52‰）相比。相反，δ13C的同位素特征在椎体中心较低，因此与C13富集较少的区域（平均-22.56‰SD±1.26‰）有关，而椎体周围（平均-20.03‰SD±1.34‰）与生产力较高的环境有关。δ13C或δ15N值在性别之间没有显著差异。

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来源期刊

Mediterranean Marine Science MARINE & FRESHWATER BIOLOGY-

CiteScore

5.20

自引率

17.90%

发文量

审稿时长

>12 weeks

期刊介绍： The journal Mediterranean Marine Science (MMS), published by the Hellenic Centre for Marine Research (HCMR), issues three volumes annually. The journal welcomes original research articles, short communications, New Mediterranean Biodiversity records, extended reviews, comments, and Theme sections in all fields of Oceanography, Marine Biology, Marine Conservation, Fisheries and Aquaculture in the Mediterranean area and the adjacent regions. All content is peer reviewed.