Food ingestion, prey selectivity, feeding incidence, and performance of yellowtail kingfish Seriola lalandi larvae under constant and varying temperatures

文献类型： 外文期刊

第一作者： Ma, Zhenhua

作者： Ma, Zhenhua;Ma, Zhenhua

作者机构：

关键词： Rotifer;Artemia nauplii;Food intake;Growth;Survival;Ontogeny

期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.235； 五年影响因子：2.616 ）

ISSN： 0967-6120

年卷期： 2014 年 22 卷 4 期

页码：

收录情况： SCI

摘要： This study tested the effects of constant and varying temperatures on newly hatched yellowtail kingfish Seriola lalandi larvae in two experiments. In Experiment I, four constant temperatures (21, 23, 25, and 27 A degrees C) were tested under fed or unfed conditions with the fish age from the day of hatch to 24 days post hatch (DPH). Temperatures at 25 and 27 A degrees C reduced the time of fish to reach irreversible starvation, but did not affect the percentage of fish that were able to ingest food. Fish survivals at 21 and 23 A degrees C were significantly higher than those at 25 A degrees C by 24 DPH, but all fish died at 27 A degrees C by 24 DPH in the treatment with food. In Experiment II, three constant temperatures (21, 23, and 25 A degrees C) and two varying temperatures (21-23 and 21-25 A degrees C) were compared using fish from hatch to 28 DPH. On 4 DPH, fish ingested more rotifers, but from 6 to 9 DPH, fish ingested fewer rotifers at 25 A degrees C than at other temperatures. On 19 and 23 DPH, fish ingested more Artemia at 25 A degrees C than at other temperatures. At 25 A degrees C, fish selected for Artemia nauplii earlier than at other temperatures. Fish length and survival between constant temperatures (21 and 23 A degrees C) were not significantly different, but fish survival at the constant 21 A degrees C or at the 21-25 A degrees C varying temperature was significantly higher than that at the constant 23 A degrees C or at the 21-23 A degrees C varying temperature. This study indicates that within the range of temperature tested, the optimal temperature for the first feeding larvae is 21-23 A degrees C after hatch and mortality is likely to occur at a parts per thousand yen25 A degrees C in the first 10 DPH, but fish grew faster at 25 A degrees C after they adapted to the increasing temperature.

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