作者
Rocio I Ruiz‐Cooley, Tim Gerrodette, Susan J Chivers, Kerri Danil
发表日期
2021/6
期刊
Journal of Animal Ecology
卷号
90
期号
6
页码范围
1583-1595
简介
- Understanding the effect of stage‐specific traits on species feeding habits can reveal how natural selection shapes life strategies. Amino acid (AA) nitrogen stable isotopes (δ15N) provide multiple proxies of habitat baseline values and diet that can improve our understanding of species feeding strategies relative to their animal metabolism. We evaluated the effect of body length as a proxy for life stage and sex on the feeding habits of the common dolphin Delphinus delphis delphis using δ13C and δ15N in bulk tissue and AAs δ15N from skin samples collected for almost two decades.
- For bulk δ13C and δ15N data, we used SIBER analysis to compare isotopic niches by sex and life stage. For AA δ15N data, we developed a hierarchical Bayesian model (HBM) to estimate indices of trophic status (Δ15N and trophic position). The model reflected the natural hierarchical structure of AA data by partitioning variability …
学术搜索中的文章
RI Ruiz‐Cooley, T Gerrodette, SJ Chivers, K Danil - Journal of Animal Ecology, 2021