STUDIES OF TROPICAL TUNA SWIMMING PERFORMANCE IN A LARGE WATER TUNNEL - ENERGETICS

STUDIES OF TROPICAL TUNA SWIMMING PERFORMANCE IN A LARGE WATER TUNNEL - ENERGETICS
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DOI：
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发表时间：
1994
期刊：
The Journal of experimental biology
影响因子：
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通讯作者：
I. Energetics;Heidi Dewar;J. B. Graham
I. Energetics;Heidi Dewar;J. B. Graham
中科院分区：
其他
文献类型：
--
作者：
I. Energetics;Heidi Dewar;J. B. Graham

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用大型水洞呼吸仪测定了3种热带金枪鱼[黄鳍金枪鱼(Thunnus Albacares)、川川金枪鱼(Euthynnus Affinis)和琵琶(Katsuwan Us Pelamis)]的代谢率(V(Dot)O2)。通过持续31h的实验，在U(17-150 cm S-1)和温度(18°30°C)范围内，确定了流速(U)对金枪鱼V(点)O2的影响。在几条鱼身上进行了重复试验。黄鳍的游动V(点)O2与温度有关(Q10=1.67，以3°5°C为间隔测定)。对于黄鳍和Skipjack来说，也可以在维护和移动之间分摊代谢成本。通过将U/V(点)O2函数外推到U=0来估算标准代谢率(SV(点)O2)。对不同尺寸群黄鳍的SV(点)O2的比较表明，V(点)O2的质量比标度指数为-0.40。金枪鱼的Sv(Dot)O2与以前用停滞呼吸测量法测定的值相当，大约是鲑鱼的三倍。与鲑鱼的进一步比较表明，金枪鱼的U/V(点)O2函数的斜率较小，显示出更高的游泳效率。
The metabolic rates (V(dot)O2) of three tropical tunas [yellowfin tuna (Thunnus albacares), kawakawa (Euthynnus affinis) and skipjack (Katsuwonus pelamis)] were estimated using a large water-tunnel respirometer. Experiments lasting up to 31 h were used to determine the effects of velocity (U) on tuna V(dot)O2 over a range of U (17-150 cm s-1) and temperatures (18­30°C). Replicate tests were carried out on several fish. The swimming V(dot)O2 of yellowfin is temperature-dependent (Q10=1.67, determined over intervals of 3­5°C). For yellowfin and skipjack, it was also possible to partition metabolic costs between maintenance and locomotion. The standard metabolic rate (SV(dot)O2) was estimated by extrapolation of the U/V(dot)O2 function to U=0. Comparisons of SV(dot)O2 for different size groups of yellowfin show that the mass-specific scaling exponent for V(dot)O2 is -0.40. The SV(dot)O2 of tuna is comparable to values determined previously by stasis respirometry and is approximately three times higher than that of salmonids. Further comparisons with salmonids show that the slope of the U/V(dot)O2 function is less for tunas, which demonstrate a greater swimming efficiency.