Abstract
Comparative growth and respiration were measured during the period hatching to metamorphosis for larval cod (Gadus morhua) at 4°, 7° and 10°Cand for haddock (Melanogrammus aeglefinus) at 4°, 7° and 9°C.Growth was positively correlated with temperature for both species. Specific growth rates on a daily basis indicated good growth for the two species at the upper two temperatures and suppressed growth at 4°C. Respiration rates measured by oxygen consumption were similar for both specie cies. Variable and elevated oxygen consumption at 4°C indicated physiological stress at that temperature. Delayed feeding abilities, feeding initiation, yolk absorption and morphological development related to first feeding ability were similar for both species at 7° to 10°C. Larvae could survive without food and still initiate feeding until 10 days after hatching at 7°C and until 8 days at 9° to 10°C.
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Communicated by M.R. Tripp, Newark
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Laurence, G.C. Comparative growth, respiration and delayed feeding abilities of larval cod (Gadus morhua) and Haddock (Melanogrammus aeglefinus) as influenced by temperature during laboratory studies. Mar. Biol. 50, 1–7 (1978). https://doi.org/10.1007/BF00390536
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DOI: https://doi.org/10.1007/BF00390536