Environmental Effects on the Spatiotemporal Variability of Fish Larvae in the Western Guangdong Waters, China
| Autor: | Feng Yuting, Lijun Yao, Jing Yu, Hui Zhao, Zhaojin Lin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences environmental effects Ocean Engineering generalized additive model 01 natural sciences Latitude lcsh:Oceanography lcsh:VM1-989 western Guangdong waters lcsh:GC1-1581 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering 010604 marine biology & hydrobiology Aquatic ecosystem Generalized additive model lcsh:Naval architecture. Shipbuilding. Marine engineering fish larvae Sea surface temperature Oceanography spatiotemporal variability Upwelling Environmental science Submarine pipeline Longitude Surface runoff |
| Zdroj: | Journal of Marine Science and Engineering Volume 9 Issue 3 Journal of Marine Science and Engineering, Vol 9, Iss 316, p 316 (2021) |
| ISSN: | 2077-1312 |
| DOI: | 10.3390/jmse9030316 |
| Popis: | Spawning grounds occupy an important position in the survival and reproduction of aquatic life, which plays an important role in the replenishment of fishery resources, especially in the China coasts where fishery resources are depleting. This study investigated environmental effects on the spatiotemporal variability of fish larvae in the western Guangdong waters (WGWs), on the basis of generalized additive models (GAMs) and center of gravity (CoG). Satellite data including sea surface salinity (SSS), sea surface temperature (SST), and in situ observations for fish larvae from April to June in 2014–2015 were used. Results showed that 40.3% of the total variation in fish larvae density was explained. SST, SSS, and depth showed positive effects in 23–24 °C and 27–30 °C, 24–32 PSU, and 0–60 m, and showed negative effects in 24–27 °C, 32–34.2 PSU, 60–80 m. Based on the stepwise GAMs, the most important factor was month, with a contribution of 10.6%, followed by longitude, offshore distance, depth, and latitude, with contributions of 7.0%, 7.0%, 6.3%, 4.2%, 3.9%, and 1.3%, respectively. Fish larvae CoG shifted northward by 0.6° N and eastwards by 0.13° E from April to June. The distribution of fish larvae in the WGWs was affected by complex submarine topography in the Qiongzhou Strait, coastal upwelling in the WGWs, and runoff from the Pearl River. |
| Databáze: | OpenAIRE |
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