A decrease in photoperiod shortly after first feeding influences the development of Atlantic salmon (Salmo salar)

Four groups of Atlantic salmon fry (n=2000) were exposed to continuous light (LD24:0) from first feeding on 18th April 2001, after which they were exposed to either an 8 or 12 week period of short days (LD10:14) starting on either the 21st May or the 18th June. Each group was then returned to LD24:0...

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Bibliographic Details
Published in:Aquaculture
Main Authors: Berrill, Iain, Smart, Alastair, Bromage, Niall R, Porter, Mark J R
Other Authors: Institute of Aquaculture, Smart Aqua, University of Stirling, University of Tasmania
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2006
Subjects:
Atlantic salmon
parr
growth
maturation
smoltification
photoperiod
Photoperiodism
Salmo salar
Online Access:http://hdl.handle.net/1893/417
https://doi.org/10.1016/j.aquaculture.2005.10.036
http://www.sciencedirect.com/science/journal/00448486
http://dspace.stir.ac.uk/bitstream/1893/417/2/Winter%20photoperiod%20timing%20and%20duration%20paper%20-%20copy%20after%20second%20comments.doc
http://dspace.stir.ac.uk/bitstream/1893/417/1/Winter%20photoperiod%20timing%20and%20duration%20paper%20-%20copy%20after%20second%20comments.pdf
Description
Summary:Four groups of Atlantic salmon fry (n=2000) were exposed to continuous light (LD24:0) from first feeding on 18th April 2001, after which they were exposed to either an 8 or 12 week period of short days (LD10:14) starting on either the 21st May or the 18th June. Each group was then returned to LD24:0 until the conclusion of the experiment the following March. In August 200 fish per treatment were individually PIT tagged. All groups were maintained under an ambient temperature regime. The highest levels of sexual maturation in 0+ male parr were recorded in the 12 week/May group (>11% of the entire male and female population), with the lowest levels (6%) in the 8 week/May and 8 week/June groups (P

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