Physiology and Survival of Wild Atlantic Salmon following Angling in Warm Summer Waters

摘要: Abstract Atlantic salmon Salmo salar, returning to freshwater spawn, were angled and then terminally sampled test the hypothesis that angling during warmer summer months (water temperatures of 20 ± 2°C) increases magnitude physiological disturbances in white muscle. Angling immediately reduced muscle ATP phosphocreatine stores, but these high-energy phosphates replenished within 2–4 h. Intramuscular glycogen stores nearly depleted after angling, unlike response by fall at 6°C, there was no resynthesis 4-h recovery period. Marked lactate postexercise metabolic proton load (▵H+ m ) accompanied depletion. The time course elimination ▵H+ correction, however, much slower than previously observed fall-angled salmon. Finally, considerable delayed postangling mortality (40%) a subgroup 22°C. We conclude ...