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Evidence of paternal nutrient provisioning to embryos in the pipefish Syngnathus typhle

Artikel i vetenskaplig tidskrift
Författare Charlotta Kvarnemo
Kenyon B. Mobley
Charlyn Partridge
Adam G. Jones
Ingrid Ahnesjö
Publicerad i Journal of Fish Biology
Volym 78
Nummer/häfte 6
Sidor 1725-1737
Publiceringsår 2011
Publicerad vid Zoologiska institutionen, ekologisk zoologi
Sidor 1725-1737
Språk en
Länkar onlinelibrary.wiley.com.ezproxy.ub....
Ämnesord feeding of offspring; paternal care; radiolabelled amino acids and glucose; Syngnathidae; viviparity
Ämneskategorier Biologiska vetenskaper, Ekologi, Marin ekologi, Etologi och beteendeekologi

Sammanfattning

In two experiments, radioactively labelled nutrients (either 3H-labelled amino-acid mixture or 14Clabelled glucose) were tube-fed to brooding male Syngnathus typhle. Both nutrients were taken up by the males and radioactivity generally increased in the brood pouch tissue with time. Furthermore, a low but significant increase of 3H-labelled amino acids in embryos was found over the experimental interval (48 h), whereas in the 14C-glucose experiment the radioactivity was taken up by the embryos but did not increase over the experimental time (320 min). Uptake of radioisotopes per embryo did not differ with embryo size. A higher uptake mg−1 tissue of both 3H-labelled amino acids and 14C-labelled glucose was found in smaller embryos, possibly due to a higher relative metabolic rate or to a higher surface-area-to-volume ratio compared to larger embryos. Uptake in embryos was not influenced by male size, embryonic developmental advancement or position in the brood pouch. It is concluded that brooding males provide amino acids, and probably also glucose, to the developing embryos in the brood pouch.

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