首页> 外文期刊>CRUSTACEANA >SEASONAL CHANGES IN BODY SIZE AND OIL SAC VOLUME OF THREE PLANKTONIC COPEPODS, PARACALANUS PARVUS (CLAUS, 1863), PSEUDOCALANUS NEWMANI FROST, 1989 AND OITHONA SIMILIS CLAUS, 1866, IN A TEMPERATE EMBAYMENT: WHAT CONTROLS THEIR SEASONALITY?
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SEASONAL CHANGES IN BODY SIZE AND OIL SAC VOLUME OF THREE PLANKTONIC COPEPODS, PARACALANUS PARVUS (CLAUS, 1863), PSEUDOCALANUS NEWMANI FROST, 1989 AND OITHONA SIMILIS CLAUS, 1866, IN A TEMPERATE EMBAYMENT: WHAT CONTROLS THEIR SEASONALITY?

机译:在温和的控制下,三种浮游CO足类动物的体型和油囊体积的季节性变化,帕拉卡拉纽斯·帕尔瓦斯(克劳斯,1863年),普苏多克兰纽斯·纽曼·弗罗斯特,1866年奥希托纳·西里利斯·克劳斯。

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摘要

Seasonal changes in body size (prosome length: PL) and oil sac volume (OSV) of the three most numerically abundant copepods in Ishikari Bay, northern Sea of Japan, Paracalanus parvus (Claus, 1863), Pseudocalanus newmani Frost, 1989 and Oithona similis Claus, 1866, were studied using monthly samples collected through vertical hauls of a 100-mu m mesh NORPAC net from March, 2001 to May, 2002. Seasonal changes in PL were common for the three species and were more pronounced during a cold spring. PL was negatively correlated with temperature, and this relationship was described well using the Belehradek equation. Seasonal changes in OSV exhibited a species-specific pattern, i.e., OSV was greater during a warm summer for P. parvus and was greater during a cold spring for P. newmani and O. similis. The OSV peak period corresponded with the optimal thermal season of each species. The relative OSV to prosome volume of the small copepods (0.6-0.8%) was substantially lower than that of the large copepods (20-32%). These facts suggest that the oil sac of small copepods is not used for overwintering or diapauses or during periods of food scarcity, but is instead used as the primary energy source for reproduction, which occurs during the optimum thermal season of each species.
机译:日本北部海石狩湾,Paracalanus parvus(Claus,1863),Pseudocalanus newmani Frost,1989和Oithona similis三种数量最多的co足动物的体型大小(体长:PL)和油囊体积(OSV)的季节性变化2001年3月至2002年5月,使用垂直采样的100微米网状NORPAC网每月收集的样本对1866年的克劳斯进行了研究。这三个物种的PL季节性变化很普遍,在寒冷的春季尤为明显。 PL与温度呈负相关,并且使用Belehradek方程很好地描述了这种关系。 OSV的季节性变化表现出特定于物种的模式,即小温疟原虫在温暖的夏季期间OSV较大,而纽曼疟原虫和拟南芥(O. similis)在寒冷的春季OSV较大。 OSV高峰期与每种物种的最佳热季节相对应。小co足类动物相对于体型体积的相对OSV(0.6-0.8%)大大低于大co足类动物(20-32%)。这些事实表明,小型co足类动物的油囊不用于越冬或滞育或在食物短缺时使用,而是用作繁殖的主要能源,其发生在每个物种的最佳热季节。

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