Effect of the mesoscale hydrographic features on larval fish distribution across the shelf break of East China Sea |
| |
| Institution: | 1. Tohoku National Fisheries Research Institute, 3-27-5 Shinhama, Shiogama, Miyagi 985-0001, Japan;2. Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo-Machi, Nagasaki 852-8521 Japan;1. Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;2. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;3. Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Marine College of Ningbo University, Ningbo 315211, China;1. Department of Oceanography, National Sun Yat-Sen University, Kaohsiung, Taiwan;2. Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China;1. Department of Biological Sciences, Macquarie University, Sydney NSW 2109, Australia;2. School of Environmental and Life Sciences, University of Newcastle, Ourimbah NSW 2258, Australia;1. Department of Oceanography, National Sun Yat-sen University, Kaohsiung, Taiwan;2. Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China;3. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China;4. Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, China;5. Key Laboratory of Underwater Acoustic Communication and Marine Information Technology (Xiamen University), Ministry of Education, Xiamen, China;1. Environmental Protection Agency, Department of Marine Research, Taikos av.26, LT-91222, Lithuania;2. Center for Physical Sciences and Technology, Savanori? av. 231, LT-02300 Vilnius, Lithuania;3. Marine Science and Technology Center, Klaip?da University, Herkaus Manto str. 84, LT-92294 Klaip?da, Lithuania;4. Klaip?da University, Herkaus Manto str. 84, LT-92294 Klaip?da, Lithuania |
| |
| Abstract: | Surveys of fish larvae and oceanographic conditions were conducted along transects across the shelf break region in the East China Sea (ECS) in May 2001. The objective of this study was to investigate the distribution and assemblages of fish larvae across the shelf break region and their relationships to mesoscale hydrographic features. There was a warm surface streamer from the Kuroshio which extended toward the shelf region of the ECS; concurrently, we observed the intrusion of the less saline shelf water into the subsurface layer towards the offshore. In all 66 taxa (65 families and 1 order) of larvae were collected by oblique net tows using a bongo net, the larval fish density and number of families sampled were lower in the low-temperature area. Based on cluster analysis and environmental factor, two larval fish assemblages were identified: off-shelf/Kuroshio and shelf break. In shelf break assemblage, Auxis spp. and Diaphus spp. were abundant in the warm surface streamer. In contrast, Maurolicus japonicus, Synagrops spp., Bregmaceros sp. and Champsodon spp. were found in the off-shelf region where the offshore intrusion of less-saline water occurred. This different pattern of the horizontal distribution would reflect vertical distribution of the larvae in the water column. Moreover, copepod nauplii density was higher in the upper layer of the shelf region. Thus, dynamic interactions between the Kuroshio and shelf waters at the frontal boundary are concluded to potentially affect larval fish transport and prey availability. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
