期刊
BEHAVIOURAL PROCESSES
卷 140, 期 -, 页码 16-18出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.beproc.2017.03.019
关键词
filial cannibalism; nutrition source; paternal care; stable isotopes; Syngnathidae
资金
- Japan Society for the Promotion of Science [09J03248]
- Overall Promotion of Environmental Research [RF0907]
- Grants-in-Aid for Scientific Research [16K14802, 09J03248] Funding Source: KAKEN
A novel type of filial cannibalism has been reported in pipefishes, in which the eggs are absorbed through the male's brood-pouch epithelium. The present study explored the applicability of stable isotope analysis for the detection of paternal brood cannibalism in the seaweed pipefish Syngnathus schlegeli. As expected, the delta N-15 values for liver, which conveys short-term dietary information about the recent reproductive season, were higher in males than in females. In contrast, the delta N-15 values for muscle, which reflects longer-term feeding habits that span both the reproductive and non-reproductive seasons, did not significantly differ between the sexes. This finding indicates that males occupy a higher trophic position than females only during the reproductive season, and it is probable that this difference is a result of paternal uptake of nutrients from embryos in the brood pouch.
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