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HAVBRUKS-Havbruk - en næring i vekst

Early puberty in salmon males in seawater - causes and consequences for hypoosmoregulatory ability and welfare

Awarded: NOK 5.4 mill.

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Project Period:

2010 - 2014


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There are major gaps in our knowledge on factors controlling puberty and its consequences for hypoosmoregulatory ability in salmonids, while the recent characterization of a range of genes involved in these processes and the development of specific qPCR a ssays opens new possibilities for studies in Atlantic salmon. We therefore propose a project that utilizes a novel experimental model to induce puberty in salmon in combination with new molecular tools and classical morphological and physiological methods to: 1) Provide in-depth knowledge of spermatogenesis in salmon maturing at different life-stages and under different environmental conditions (photoperiod, temperature and salinity), and examine the endocrine control of male puberty with focus on the Ki ss/Gpr54 and Gnrh/Fsh systems. 2) Study osmoregulatory changes and their endocrine control in sexually maturing salmon with focus on possible effects of sex steroids, and assess welfare consequences of maintaining sexually mature male salmon in seawater.

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HAVBRUKS-Havbruk - en næring i vekst