The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary
The estuarine areas provide necessary spawning habitat, nursing habitat, and migratory for a variety of fishes and the environmental conditions are of significant heterogeneity. Coilia mystus is the key commercial fish that spawns in the Yangtze Estuary and the yield has declined sharply in the past...
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Frontiers Media S.A.
2021
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oai:doaj.org-article:8b7763152706478dbfc6e36a03bf9f7d2021-11-08T04:55:03ZThe Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary2296-774510.3389/fmars.2021.766616https://doaj.org/article/8b7763152706478dbfc6e36a03bf9f7d2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.766616/fullhttps://doaj.org/toc/2296-7745The estuarine areas provide necessary spawning habitat, nursing habitat, and migratory for a variety of fishes and the environmental conditions are of significant heterogeneity. Coilia mystus is the key commercial fish that spawns in the Yangtze Estuary and the yield has declined sharply in the past 30 years. In order to understand the spawning habitat selection mechanism of C. mystus, the geographically weighted regression (GWR) model was applied to explore the non-stationary effect of environmental variables [e.g., the sea surface temperature (SST) and the sea surface salinity (SSS)] and geographical variables [e.g., the distance to the coast (DTC) and the depth (DEP) of water] on the egg density distribution of C. mystus. The data were derived from the spring and summer ichthyoplankton surveys carried out from 2019 to 2020 in the Yangtze Estuary, China. The GWR model results showed that the key variables in different seasons had spatial non-stationary effects on the distribution of spawning habitat of C. mystus, which were mainly caused by regional rise in temperature and saltwater intrusion of the South Branch. In the spring, the SSS, the DTC, and the DEP were the main impact factors and saltwater intrusion in the South Branch might lead to the trend that the spawning habitat moved further upstream to the Changxing Island. The SST was most important in the summer and the relatively lower SST was more crucial in the spawning habitat selection than the DTC and the DEP. The GWR model performed well in the study of C. mystus potential spawning habitat in the Yangtze Estuary. We recommend that more attention should be paid in regional variation of environmental factors to explore fish potential spawning habitat in the estuarine areas.Dong WangDong WangDong WangRong WanRong WanRong WanZengguang LiZengguang LiZengguang LiJunbo ZhangJunbo ZhangJunbo ZhangXiangyu LongPengbo SongLu ZhaiLu ZhaiLu ZhaiShuo ZhangShuo ZhangShuo ZhangFrontiers Media S.A.articlegeographically weighted regression (GWR) modelestuarine areasCoilia mystusspawning habitatthe Yangtze EstuaryScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021) |
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geographically weighted regression (GWR) model estuarine areas Coilia mystus spawning habitat the Yangtze Estuary Science Q General. Including nature conservation, geographical distribution QH1-199.5 |
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geographically weighted regression (GWR) model estuarine areas Coilia mystus spawning habitat the Yangtze Estuary Science Q General. Including nature conservation, geographical distribution QH1-199.5 Dong Wang Dong Wang Dong Wang Rong Wan Rong Wan Rong Wan Zengguang Li Zengguang Li Zengguang Li Junbo Zhang Junbo Zhang Junbo Zhang Xiangyu Long Pengbo Song Lu Zhai Lu Zhai Lu Zhai Shuo Zhang Shuo Zhang Shuo Zhang The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary |
| description |
The estuarine areas provide necessary spawning habitat, nursing habitat, and migratory for a variety of fishes and the environmental conditions are of significant heterogeneity. Coilia mystus is the key commercial fish that spawns in the Yangtze Estuary and the yield has declined sharply in the past 30 years. In order to understand the spawning habitat selection mechanism of C. mystus, the geographically weighted regression (GWR) model was applied to explore the non-stationary effect of environmental variables [e.g., the sea surface temperature (SST) and the sea surface salinity (SSS)] and geographical variables [e.g., the distance to the coast (DTC) and the depth (DEP) of water] on the egg density distribution of C. mystus. The data were derived from the spring and summer ichthyoplankton surveys carried out from 2019 to 2020 in the Yangtze Estuary, China. The GWR model results showed that the key variables in different seasons had spatial non-stationary effects on the distribution of spawning habitat of C. mystus, which were mainly caused by regional rise in temperature and saltwater intrusion of the South Branch. In the spring, the SSS, the DTC, and the DEP were the main impact factors and saltwater intrusion in the South Branch might lead to the trend that the spawning habitat moved further upstream to the Changxing Island. The SST was most important in the summer and the relatively lower SST was more crucial in the spawning habitat selection than the DTC and the DEP. The GWR model performed well in the study of C. mystus potential spawning habitat in the Yangtze Estuary. We recommend that more attention should be paid in regional variation of environmental factors to explore fish potential spawning habitat in the estuarine areas. |
| format |
article |
| author |
Dong Wang Dong Wang Dong Wang Rong Wan Rong Wan Rong Wan Zengguang Li Zengguang Li Zengguang Li Junbo Zhang Junbo Zhang Junbo Zhang Xiangyu Long Pengbo Song Lu Zhai Lu Zhai Lu Zhai Shuo Zhang Shuo Zhang Shuo Zhang |
| author_facet |
Dong Wang Dong Wang Dong Wang Rong Wan Rong Wan Rong Wan Zengguang Li Zengguang Li Zengguang Li Junbo Zhang Junbo Zhang Junbo Zhang Xiangyu Long Pengbo Song Lu Zhai Lu Zhai Lu Zhai Shuo Zhang Shuo Zhang Shuo Zhang |
| author_sort |
Dong Wang |
| title |
The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary |
| title_short |
The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary |
| title_full |
The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary |
| title_fullStr |
The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary |
| title_full_unstemmed |
The Non-stationary Environmental Effects on Spawning Habitat of Fish in Estuaries: A Case Study of Coilia mystus in the Yangtze Estuary |
| title_sort |
non-stationary environmental effects on spawning habitat of fish in estuaries: a case study of coilia mystus in the yangtze estuary |
| publisher |
Frontiers Media S.A. |
| publishDate |
2021 |
| url |
https://doaj.org/article/8b7763152706478dbfc6e36a03bf9f7d |
| work_keys_str_mv |
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