First feeding of Atlantic salmon (Salmo salar L.) fry as influenced by temperature regime
1989; Elsevier BV; Volume: 78; Issue: 1 Linguagem: Inglês
10.1016/0044-8486(89)90004-5
ISSN1873-5622
AutoresR. H. Peterson, D. J. Martin‐Robichaud,
Tópico(s)Marine and fisheries research
ResumoAtlantic salmon fry grew best during first feeding at temperatures of 16–20°C. Diurnally cycled temperature regimes (20°C day/12°C night or 16°C day/ 12°C night) did not improve initial growth rates as compared with those of fry reared at constant 20°C or 16°C. Incubation temperature prior to swim-up had no effect on growth during initial feeding. Internal yolk remaining in newly feeding fry could be estimated with the formula 0.56y + 0.825 (1−y) = h; where y=wet weight fraction that is yolk, and h=the water content of the fry. Water content of 80% in swim-up fry is a suitable index of when to start feeding.
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