Distribution of Calanus spp. on and around the Nova Scotia Shelf in April : evidence for an offshore source of Calanus finmarchicus to the central and western regions
Distribution of Calanus spp. on and around the Nova Scotia Shelf in April : evidence for an offshore source of Calanus finmarchicus to the central and western regions
复制标题
哲水蚤属分布
DOI：
10.1139/f99-193
复制
发表时间：
1999
影响因子：
2.4
通讯作者：
B. Petrie
中科院分区：
文献类型：
--
作者：
E. Head;L. Harris;B. Petrie
水文学和哲水蚤属的观察。 1995年4月和1997年4月横跨斯科舍大陆架中部和东部的线路上的监测站以及1997年横跨斯科舍大陆架中部和东部的线路上的监测站以及横跨卡伯特海峡(CS)和劳伦森海峡(LC)的其他线路上的监测站都出现了丰度。在中部和西部斯科舍大陆架上，Calanus finmarchicus比在东部更为丰富，而Calanus hyperboreus则集中在东部和受新斯科舍海流影响的地区。哲水蚤属SS东部的种群可能主要起源于在圣劳伦斯湾越冬的种群。当存在温暖的坡水时，C. finmarchicus 的丰度出现在陆架折断处或之外，这表明它们源自在南沙群岛南部深水中越冬的种群。在这两年中，哈利法克斯线 (HL) 陆架站的近地表层都存在斜坡水，但 1997 年入侵程度更大。书架上的 Calanus finmarchicus 丰度也大幅提高...
Observations of hydrography and Calanus spp. abundance were made at stations on lines across the central and eastern Scotian Shelf (SS) in April 1995 and 1997 and on additional lines on the western SS and across Cabot Strait (CS) and the Laurentian Channel (LC) in 1997. Calanus finmarchicus was more abundant on the central and western SS than in the east, and Calanus hyperboreus was concentrated in the east and in areas influenced by the Nova Scotia Current. Calanus spp. on the eastern SS probably originated mainly from populations overwintering in the Gulf of St. Lawrence. High abundances of C. finmarchicus occurred at or beyond the shelf break when warm slope water was present, suggesting that they derived from a population overwintering in the deep water south of the SS. In both years, slope water was present in the near-surface layers at shelf stations of the Halifax Line (HL), but in 1997 the degree of intrusion was greater. Calanus finmarchicus abundances were also substantially higher at shelf stat...