Why does a component of Calanus finmarchicus stay in the surface waters during the overwintering period in high latitudes
Why does a component of Calanus finmarchicus stay in the surface waters during the overwintering period in high latitudes
复制标题
为什么高纬度地区越冬期间，Finmarchicus的一个成分会留在地表水中
DOI：
10.1016/1054-3139(95)80066-2
复制
发表时间：
1995
影响因子：
3.3
通讯作者：
G. Ottesen
中科院分区：
文献类型：
--
作者：
G. Pedersen;K. Tande;G. Ottesen
在越冬期间，哲水蚤finmarchicus是已知的居住在更深的沃茨在高纬度环境。最近的数据表明，该物种的越冬阶段也发现在冬季期间的地表水。本文的文件，越冬阶段CIV和CV是丰富的最高100米在选定的网站在巴伦支海的西部，并在挪威北部的海岸和峡湾地区。本文采用下颌基蛋白石牙形成的监测方法，研究了表层和深水种群的蜕皮周期。虽然只有有限数量的标本进行了检查，没有发现蜕皮指数约300个标本从11月至1月进行了检查。在整个冬季期间，在Grøtsund的整个白天垂直分布模式似乎有一个相当大的组成部分的人口在最高的100米的深度，不同的巴伦支海，在那里的变化程度较高的垂直分布ofC。物理条件和由于滞育程度的差异而引起的权衡可能是这种垂直分布格局的原因。在Grøtsund，CIV和CV期的apolysis在2月初发现，在蜕皮开始之前。目前的研究表明，在越冬代的脱顶与蜕皮更紧密地耦合比以前在C。来自缅因州海湾的芬马库斯。
During the overwintering periodCalanus finmarchicusis known to reside in deeper waters in high-latitude environments. More recent data indicate that the overwintering stages of this species are also found in surface water during the winter period. The present article documents that overwintering stages CIV and CV are abundant in the uppermost 100 m at selected sites in the western part of the Barents Sea, and in coastal-and fjord areas in North Norway. The moulting cycle of the surface and deep-water dwelling population components was studied by using a method for monitoring the formation of the opal teeth on the mandibular gnathobase. Although only a limited number of specimens were examined, no moulting indices were found out of approximately 300 specimens examined from November to January. The overall daytime vertical distribution pattern in Grøtsund appeared to have a fairly large component of the population in the uppermost 100 m of depth during the entire winter period, differing from the Barents Sea, where a higher degree of variability in the vertical distribution ofC. finmarchicuswas found. Physical conditions and trade-offs due to differences in the degree of diapause might account for this vertical distribution pattern. In Grøtsund, the apolysis in stages CIV and CV was found at the beginning of February, prior to the onset of ecdysis. The present study indicated that apolysis in overwintering generations is more closely coupled to ecdysis than shown earlier inC. finmarchicusfrom the Gulf of Maine.