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Effect of temperature on the scope for growth in juvenile scallops Argopecten purpuratus (Lamark, 1819)

机译:温度对少年扇贝Argopecten purpuratus的生长范围的影响(拉马克,1819年)

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The effect of temperature on scope for growth was determined in juveniles of the northern scallop Argopecten purpuratus (Lamarck, 1819). This economically important species, has been introduced into the south of Chile given that large-scale cultivation within the natural distribution zone is limited. Nevertheless, the lower water temperatures that exist in the south could restrict the growth rate. No difference in the scope for growth was detected in specimens kept at 10 +/- 1 degreesC and 18 +/- 1 degreesC and fed with a mixed diet 1:1 of Chaetoceros gracilis and Tetraselmis suecica. Temperature did not affect the quantity of energy derived from food ingested, but energy loss through respiration, faeces and excretion was greater at 10 +/- 1 degreesC than at 18 +/- 1 degreesC. The results indicate that the growth rates of A. purpuratus are maintained between 10 +/- 1 degreesC and 18 +/- 1 degreesC, which would favour large-scale cultivation over a wide latitudinal range.
机译:在北部扇贝Argopecten purpuratusus的幼鱼中确定了温度对生长范围的影响(Lamarck,1819年)。由于在自然分布区内的大规模种植受到限制,这种具有重要经济意义的物种已被引入智利南部。然而,南部存在的较低的水温可能会限制增长率。在分别保持在10 +/- 1摄氏度和18 +/- 1摄氏度并饲喂1:1的Chaetoceros gracilis和Tetraselmis suecica混合饮食的标本中,没有发现生长范围的差异。温度不影响从食物中摄取的能量,但是在10 +/- 1摄氏度时,通过呼吸,粪便和排泄物产生的能量损失要比在18 +/- 1摄氏度时更大。结果表明紫癜土壤杆菌的生长速度保持在10 +/- 1摄氏度和18 +/- 1摄氏度之间,这将有利于在宽纬度范围内进行大规模种植。

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