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Effect of temperature under unfavourable conditions on oxygen uptake of larval herring,Clupea harengus
Authors:Yin Ming-cheng  R. S. Batty
Affiliation:(1) Shanghai Fisheries University, 200090 Shanghai;(2) Dunstaffnage Marine Laboratory, SAMS, PA34 4AD Oban, Argyll, Scotland
Abstract:Oxygen uptake under starvation and short periods of sudden temperature change was measured for larval herring (Clupea harengus L.) reared at average temperature of 7.3, 11 and 12.9°C. Larval stages between first feeding and premetamorphosis were used. For comparison, the routine oxygen uptake (ROU) was also investigated and followed the relationshipQ=0.974+0.174tW −0.210, whereQ is in μg/(mg·h),W is dry body weight in mg andt is temperature in °C. The oxygen uptake under starvation (SOU, deprived of food for 24 h) was different from the routine when the larval dry weight was less than 0.6–0.8 mg; it increased with temperature and body weight giving the relationshipQ=1.568+0.110tW 0.380; if the larval dry weight was more than 0.6–0.8 mg, it reverted to the norm (Q=1.704+0.078tW −0.349). The oxygen uptake was tested in short periods (3 h) of sudden temperature changes in six groups: 7.3 to 11, 7.3 to 12.9, 11 to 7.3, 11 to 12.9, 12.9 to 7.3 and 1.29 to 11°C. The oxygen uptake in the 7.3 to 12.9 and 12.9 to 7.3°C groups varied in a way similar to that of the larvae under starvation. The other four groups' oxygen uptake were more or less normal.
Keywords:herring larvae  oxygen uptake  starvation  sadden temperature change  respirometry
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