Ontogenetic diel vertical migration behaviors of the marine planktonic copepods Calanus pacificus and Metridia lucens
Ontogenetic diel vertical migration behaviors of the marine planktonic copepods Calanus pacificus and Metridia lucens
复制标题
海洋浮游桡足类Calanus pacificus和Metridia lucens的个体发育昼夜垂直迁移行为
DOI：
10.3354/meps104013
复制
发表时间：
1994
影响因子：
2.5
通讯作者：
B. Frost
中科院分区：
文献类型：
--
作者：
K. Osgood;B. Frost
白天和夜间垂直分层浮游动物样品跨越整个水柱从Dabob湾。华盛顿。美国，几年来。所有桡足类阶段的哲水蚤pacificus和Metndia lucens的垂直分布进行了分析，从8个巡航代表的季节范围，以及几个日期时，推断无脊椎动物或脊椎动物捕食浮游动物的压力是强或弱。相似大小级的C. pacificus和M.卢森斯则不同。C. pacificus与表层沃茨关系密切，除滞育期外，各虫态在夜间均在50 m处。在白天，C. pacificus在不同程度上避开了表层，年龄较大的阶段通常更深。C4和更年轻的阶段特别依赖于表面沃茨，大多数种群通常在白天和晚上在顶部25米处。M. Lucens与表面层的关联不太强。虽然成年女性，通常是CS，经历了正常的昼夜迁移（DVM），进入表面50米，在夜间，绝大多数的成年男性总是停留在75米以下。C4和更年轻的阶段表现出更多样化的行为。在某些日期，他们经历了一个反向DVM，避免表面25米，在夜间，在其他时间，他们避免表面10米，特别是在白天，而在其他日期的C3和年轻的阶段避免表面25米昼夜。在大多数日期，在取样的最深层中有所有阶段的重要部分。这两个物种迁移行为的差异可能是由于它们对捕食的敏感性不同，或者是它们生物学的一些其他方面。
Daytime and nighttime vertically stratified zooplankton samples spanning the entire water column were obtained from Dabob Bay. Washington. USA, during several years. Vertical distributions of all the copepodid stages of Calanus pacificus and Metndia lucens were analyzed from 8 cruises representing the range of seasons, as well as several dates when inferred invertebrate or vertebrate predation pressures on zooplankton were strong or weak. Migration behaviors of similar-sized stages of C. pacificus and M. lucens differed. C. pacificus was closely associated with the surface waters; a large percentage of every stage was always in the surface 50 m at night except when the C5s were in diapause. During the day the different stages of C. pacificus showed varying degrees of avoidance of the surface layers, with the older, larger stages generally being deeper. The C4 and younger stages were particularly tied to the surface waters, with the majority of the population usually in the top 25 m during the day and night. M. lucens was less strongly associated with the surface layers. While the adult females, and usually the CSs, underwent a normal diel vetical migration (DVM), entering the surface 50 m at night, the vast majority of the adult males always stayed below 75 m. The C4 and younger stages showed more varied behavior. On some dates they underwent a reverse DVM, avoiding the surface 25 m at night, at other times they avoided the surface 10 m particularly during the day, while on still other dates the C3 and younger stages avoided the surface 25 m day and night. On most dates there were significant portions of all the stages in the deepest layers sampled. Differences in the 2 species' migration behavior may be due to differences in their susceptibility to predation, or some additional aspect of their biologies.