Effects of a mesoscale eddy on the distribution of mesopelagic fish larvae in the Gulf of California

被引:4
作者
Contreras-Catala, Fernando [1 ]
Sanchez-Velasco, Laura [1 ]
Beier, Emilio [2 ]
Godinez, Victor M. [3 ]
机构
[1] CICIMAR IPN, Dept Plancton & Ecol Marina, La Paz 23096, Bcs, Mexico
[2] Unidad La Paz, Ctr Invest Cient & Educ Super Ensenada, La Paz 23050, Bcs, Mexico
[3] CICESE, Dept Oceanog Fis, Ensenada 22860, Baja California, Mexico
来源
REVISTA DE BIOLOGIA MARINA Y OCEANOGRAFIA | 2015年 / 50卷 / 03期
关键词
Three-dimensional distribution; Vinciguerria lucetia; Diogenichthys laternatus; cyclonic eddy; VERTICAL-DISTRIBUTION; EDDIES; ASSEMBLAGES; CIRCULATION; SUMMER; VARIABILITY; PACIFIC; HABITAT; BIOMASS; SYSTEM;
D O I
10.4067/S0718-19572015000400014
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
We examined the effect of a mesoscale cyclonic eddy on the three-dimensional distribution of Vinciguerria lucetia and Diogenichthys laternatus in southern Gulf of California during July 2010. CTD data and zooplankton samples collected with a closing-opening net (505 mu m), were obtained on 2 transects across the eddy, and on a transect outside of the mesoscale structure. In the later the thermocline depth was at similar to 40 m where larvae V. lucetia dominated. Opposite to V. lucetia distribution, D. laternatus larvae was the dominant species in the deepest strata. In the area influenced by the cyclonic eddy (similar to 350 m depth and similar to 60 km diameter), the thermocline was sunk from similar to 25 m (eddy edge) to similar to 50 m depth (eddy center). The isotherms below the thermocline formed a dome from similar to 350 m to similar to 100 m depth in the eddy center. This upwelling coincided with an increase of D. laternatus larvae in the water column. Compared with the transect outside of the cyclonic eddy, the shoaling of the isotherms inside the eddy produced not only an increase of D. laternatus larvae, also decreased the V. lucetia abundance. These variations in larval distribution of both mesopelagic species are closely correlated with the mesoscale cyclonic eddy.
引用
收藏
页码:575 / 582
页数:8
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