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作者Min-Wei,Peng;Yu-Ying Hsu;Yung-Che Tseng;Chiou-Ju Yao;Jen-Chien Shiao
出版日期202104
著作名稱Stable isotope composition utilization: the activity radius and foraging resource analysis on finless porpoise in the Taiwan strait
會議論文集2021海洋科學年會暨科技部海成果發表會
頁數208
會議名稱2021海洋科學年會
會議地點澎湖縣馬公市
會議日期20210428
主辦單位澎湖科技大學
國際性會議N
主題動物;動物
關鍵字δ13C, δ15N, finless porpoise, life history
摘要As cetaceans are the apex predators, a strong interplay would be occurred between
the population size, habits of cetaceans, and marine ecological structure. The numbers of
stranded finless porpoise N. asiaeorientalis sunameri in Taiwan strait area have been
increasing in recent years, especially recorded nearby the Matsu island. The study aims
to investigate whether their activity and foraging radius is related to the increased stranded
numbers. Stable isotopes of carbon (δ13C) and nitrogen (δ15N) compositions in the tooth,
muscle, and stomach contents of finless porpoises were measured to estimate their
activity radius and foraging resource. On the one hand, according to the δ13C profiling in
different dentine growth layer groups (GLGs), we inferred that their activity radius is
close to estuarine and nearshore regions. On the other hand, the δ13C features in stomach
contents infer that this finless porpoise might forage away from their regular habitats.
Besides, the δ15N compositions in stomach contents could denote the trophic level of
Taiwan population is higher than that of Matsu counterpart. This study is expected to
understand the possible reason for increased stranded records and provide feasible
conservation information for this threatened species reported in the IUCN red list.
系統號NO000006338

Mar 4 2022 11:36:14
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