论文
论文标题: Temporal variation in the diet of Yangtze finless porpoise calls for conservation of semi-migratory fish
作者: Yang, Jiwei; Wang, Kang; Mei, Zhigang; Xu, Jun; Zheng, Jinsong; Wan, Xiaoling; Hao, Yujiang; Wang, Kexiong; Wang, Ding
出版刊物: FRESHWATER BIOLOGY
出版日期:
出版年份: 2021
卷/期:
DOI: 10.1111/fwb.13692
论文摘要: Identifying the feeding patterns of large-bodied predators is necessary to predict their potential effects on food-web dynamics and to inform species conservation. In contrast to diet information from stomach contents, diet estimates obtained using stable isotopes in blood and muscle can reveal temporal variation in diets. Here, we used an extensive stable isotope dataset and Bayesian stable isotope mixing model to evaluate the trophic role of the Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis), a critically endangered species distributed in the middle and lower catchments of the Yangtze River. We analysed blood samples from 24 individuals captured during March 2017 in Poyang Lake (which adjoins the Yangtze River), and muscle samples from 8 individuals stranded in the lake over a 1-year period (2012-2013). We additionally genotyped prey from faecal samples taken from 13 individuals captured in March 2017. We found that as a generalist apex predator, this finless porpoise consumes semi-migratory and non-migratory fish prey. However, relative proportions of these two prey resources were different between dietary analyses based on blood samples compared to muscle samples, reflecting recent and longer-term consumption patterns, respectively. Non-migratory fish contributed mainly to the diet of predators in the early and middle of March. In contrast, semi-migratory fish comprised the majority of the prey composition over a more extended period (e.g. 2-3 months), and the difference may be linked to changes in the fish abundance influenced by seasonal factors. Our findings provide insights into the trophic role of this critically imperilled but little studied species, demonstrate how stable isotope analyses can elucidate finless porpoise feeding ecology, and emphasise the importance of semi-migratory fish to conserving this porpoise population.
== 实验室与学会 ==
  • == 实验室与学会 ==
  • 水产品种创制与高效养殖全国重点实验室
  • 中国科学院藻类生物学重点实验室
  • 农业部淡水养殖病害防治重点实验室
  • 武汉白暨豚保护基金会
  • 湖北省海洋湖沼学会
  • 中国动物学会原生动物学分会
  • 中国动物学会斑马鱼分会
  • 湖北省暨武汉动物学会
  • 中国水产学会鱼病学专业委员会
  • 中国鱼类学会
== 平台建设 ==
  • == 平台建设 ==
  • “一带一路”海域赤潮数据库
  • 国家水生生物种质资源库
  • 国家斑马鱼资源中心
  • 中国科学院淡水藻种库
  • 中国科学院武汉生命科学大型仪器区域中心
  • 湿地生态系统观测研究野外站联盟
  • 中国科学院水生生物研究所分析测试中心
  • 中国科学院超级计算武汉分中心
  • 水生生物博物馆
== 相关网站推荐 ==
  • == 相关网站推荐 ==
  • 中国科学院
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  • 湖北省生态环境厅
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