Diel, seasonal and ontogenetic variations in the vertical distributions of four marine copepods
Diel, seasonal and ontogenetic variations in the vertical distributions of four marine copepods
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四种海洋桡足类垂直分布的昼夜、季节和个体发育变化
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
T. Semenova
中科院分区：
文献类型：
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作者：
T. Falkenhaug;K. Tande;T. Semenova
挪威北方马兰根芬兰哲水蚤Metr jd~a longa M lucens和剑哲水蚤C h ~ r ~ d l u s armatus垂直分布的昼夜和季节变化结果表明，从Fe B ~（12）到1992年12月，各物种间和同一物种不同发育阶段间的垂直分布是不同的。由于季节性而不是垂直迁移，在春季浮游植物大量繁殖期间，在表层沃茨中发现了该物种秋季和冬季在峡湾底部，梅勒藻属（Melrldla spp.）垂直迁移者中，长刺蛾的停留深度和迁移量均大于亮刺蛾，长刺蛾在西部的分布深度大于在西部。在夏季，光生苔没有这种季节变化趋势。光生苔的垂直行为与日长的季节变化有关，在日长反差大的时期，昼夜变化强烈（春秋）但在阳光明媚和冬季黑暗的时期停止，在夏季，盔甲昼夜都很深，4种鱼类的幼鱼期均较弱或不能用sam p l ~ n g法检测到。C finn~archlcus和Metr ld~a spp的幼鱼期在水柱中保持较高水平，而在棘胸鱼中则相反。垂直行为的季节性变化与食物和光照条件的变化有关。种内和种内的差异可能是由于生活史饮食和对捕食的敏感性。桡足类垂直方向是r~但t~on。Vert~cal m~grat ion Fjords .北方挪威
Diel and seasonal vana t~ons in the vertical d is tnbut~ons of Calanus finmarchicus Metr jd~a longa M lucens and C h ~ r ~ d l u s armatus in Malangen, northern Norway, were determined from F e b ~ uary until December 1992 The vertical behav~our differed among the species and among the ditterent stages of a single species The vertical distnbution of C hnmarchlcus was dom~na ted by seasonal rather than d ~ e l vertical migra t~on, and this species was found in surface waters during the spring phytoplankton bloom (March to May) and at the bottom of the fjord in the fall and wlnter Melrldla spp were generally cons~stent d ~ e l vertical mlgrators However M longa usually stayed deeper and had a larger migration dmplltude than M lucens M longa was more deeply dlstrlbuted In the w ~ n t e r than d u r ~ n g the summer while M lucens showed no such seasonal trend The vertical behaviour of C d ~ m a t u s was related to the seasonal change In day length and diel ver t~cal ~nlgratlon was strong In periods of large dayh igh t contrast (spring and autumn) but ceased d u r ~ n g the pe r~ods of m ~ d n ~ g h t sun and wlnter darkness Duiing the summer C armatus stayed deep both day and night D ~ e l vertlcal behav~our in young stages of all 4 species was weak or undetectable by the s a m p l ~ n g method used Younger stages of C finn~archlcus and Metr ld~a spp remained higher in the water column, tvhile the opposite was observed In C armatus While seasonal vana t~ons in vertical behaviour a r e related to vana t~ons in food and light condltlons ~ n t e r and intraspecific differences may be due to life h~story diet and suscept~bil~ t y to predation K E Y WORDS: Zooplankton . Copepods . Vertlcal d i s t r~bu t~on . Vert~cal m~grat ion Fjords . Northern Norway