Effects of mesoscale structures on the distribution of cephalopod paralarvae in the Gulf of California and adjacent Pacific

被引:15
|
作者
Ruvalcaba-Aroche, Erick D. [1 ]
Sanchez-Velasco, Laura [1 ]
Beier, Emilio [2 ]
Godinez, Victor M. [3 ]
Barton, Eric D. [4 ]
Rocio Pacheco, Ma. [1 ]
机构
[1] Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, Av Inst Politecn Nacl S-N, La Paz 23096, Bcs, Mexico
[2] CICESE, Unidad La Paz, Miraflores 334 E Mulege & La Paz, La Paz 23050, Bcs, Mexico
[3] CICESE, Dept Oceanog Fis, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja California, Mexico
[4] Inst Invest Marinas CSIC, Dept Oceanog, Eduardo Cabello 6, Vigo 36208, Spain
关键词
Paralarvae; Cephalopods; SD complex; Mesoscale structures; Water masses; Gulf of California; Eastern tropical-subtropical Pacific; EASTERN TROPICAL PACIFIC; OXYGEN MINIMUM ZONE; SQUID DOSIDICUS-GIGAS; LARVAL FISH HABITATS; 3-DIMENSIONAL DISTRIBUTION; JUMBO SQUID; EL-NINO; OCEAN; OMMASTREPHIDAE; MEXICO;
D O I
10.1016/j.dsr.2017.11.005
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Vertical distribution of the cephalopod paralarvae was investigated in relation to a system of two cyclonic and three anticyclonic eddies in the southern Gulf of California and a front in the adjacent Pacific Ocean. Results showed that the preferential habitat for the Sthenoteuthis oualaniensis - Dosidicus gigas "SD-complex" in both regions was the oxygenated surface mixed layer and the thermocline. The highest abundances occurred in of one of the anticyclonic eddies and a frontal zone, which are convergent structures. Enoploteuthid and Pyroteuthid paralarvae both displayed their highest abundances in the thermocline. Pyroteuthids dominated in the cyclonic eddy whereas Enoploteuthidae were less evident in the eddy system. Pyroteuthids were observed on the western (California Current) side of the frontal zone, and Enoploteuthids on its eastern (Gulf of California) side. The octopods and the complex of Ommastrephes-Eucleoteuthis-Hyaloteuthis paralarvae were present below the thermocline. Both groups had a scarce presence in the eddy system and high abundance near the frontal zone. The octopods abounded on the eastern side in association with the low dissolved oxygen concentrations (< 44 mu mol kg(-1)) of Subtropical-Subsurface Water; the complex on the western front side was immersed in California Current Water. It may be concluded that the spawning and early stages of development of these cephalopod groups are associated with particular mesoscale structures of the water masses. For example, the "SD complex" inhabits the surface water masses, preferentially in convergence zones generated by mesoscale activity.
引用
收藏
页码:62 / 74
页数:13
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