Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs
Resources utilization and trophic structure in aquatic food webs play important roles in the ecosystem stability and functioning. Silver carp (SC, Hypophthalmichthys molitrix) and bighead carp (BC, Hypophthalmichthys nobilis) are intensively stocked in lakes and reservoirs in China and share similar...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2019-01-01
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| Series: | Journal of Freshwater Ecology |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/02705060.2018.1560368 |
| _version_ | 1811203453409558528 |
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| author | Man Zhang Yifan Wang Binhe Gu Yuncong Li Weixia Zhu Li Zhang Liping Yang Xuejun Li |
| author_facet | Man Zhang Yifan Wang Binhe Gu Yuncong Li Weixia Zhu Li Zhang Liping Yang Xuejun Li |
| author_sort | Man Zhang |
| collection | DOAJ |
| description | Resources utilization and trophic structure in aquatic food webs play important roles in the ecosystem stability and functioning. Silver carp (SC, Hypophthalmichthys molitrix) and bighead carp (BC, Hypophthalmichthys nobilis) are intensively stocked in lakes and reservoirs in China and share similar food resources and trophic positions in water bodies. To better understand the ecological roles of SC and BC in natural freshwater, two mesotrophic reservoirs (Nanwan and Nianyushan) were selected to compare resource utilization and the trophic niche of these two fish species. Data analysis using Bayesian mixing model showed that SC was more like a fine particulate organic matter (fPOM) feeder, while BC consumed more coarse particulate organic matter (cPOM) and displayed a higher trophic position in both reservoirs. In contrast, niche breadths represented by the corrected standard ellipse area (SEAC) were essentially the same for SC and BC in Nanwan (SEAC = 6.1 for SC and BC), but much larger for silver carp in Nianyushan (SEAC for SC: 11.6, SEAC for BC: 4.2). The high stocking ratio of SC/BC in Nianyushan was the probable reason for the large SEAC of silver carp, which suggested that silver carp could use more food resources and become more competitive with a higher stocking biomass ratio. The results indicated that the trophic partitioning of filter feeders might be regulated by the stocking biomass ratio of the fish to some extent. |
| first_indexed | 2024-04-12T02:55:57Z |
| format | Article |
| id | doaj.art-416f694884524c9398c1e55a4e47fed8 |
| institution | Directory Open Access Journal |
| issn | 0270-5060 2156-6941 |
| language | English |
| last_indexed | 2024-04-12T02:55:57Z |
| publishDate | 2019-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Freshwater Ecology |
| spelling | doaj.art-416f694884524c9398c1e55a4e47fed82022-12-22T03:50:49ZengTaylor & Francis GroupJournal of Freshwater Ecology0270-50602156-69412019-01-0134119921210.1080/02705060.2018.15603681560368Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirsMan Zhang0Yifan Wang1Binhe Gu2Yuncong Li3Weixia Zhu4Li Zhang5Liping Yang6Xuejun Li7Henan Normal UniversityHenan Normal UniversityUniversity of FloridaUniversity of FloridaZhengzhou Customs of the People’s Republic of ChinaZhengzhou Customs of the People’s Republic of ChinaHenan Normal UniversityHenan Normal UniversityResources utilization and trophic structure in aquatic food webs play important roles in the ecosystem stability and functioning. Silver carp (SC, Hypophthalmichthys molitrix) and bighead carp (BC, Hypophthalmichthys nobilis) are intensively stocked in lakes and reservoirs in China and share similar food resources and trophic positions in water bodies. To better understand the ecological roles of SC and BC in natural freshwater, two mesotrophic reservoirs (Nanwan and Nianyushan) were selected to compare resource utilization and the trophic niche of these two fish species. Data analysis using Bayesian mixing model showed that SC was more like a fine particulate organic matter (fPOM) feeder, while BC consumed more coarse particulate organic matter (cPOM) and displayed a higher trophic position in both reservoirs. In contrast, niche breadths represented by the corrected standard ellipse area (SEAC) were essentially the same for SC and BC in Nanwan (SEAC = 6.1 for SC and BC), but much larger for silver carp in Nianyushan (SEAC for SC: 11.6, SEAC for BC: 4.2). The high stocking ratio of SC/BC in Nianyushan was the probable reason for the large SEAC of silver carp, which suggested that silver carp could use more food resources and become more competitive with a higher stocking biomass ratio. The results indicated that the trophic partitioning of filter feeders might be regulated by the stocking biomass ratio of the fish to some extent.http://dx.doi.org/10.1080/02705060.2018.1560368stable isotopefood webniche breadthresource utilizationstocking ratio |
| spellingShingle | Man Zhang Yifan Wang Binhe Gu Yuncong Li Weixia Zhu Li Zhang Liping Yang Xuejun Li Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs Journal of Freshwater Ecology stable isotope food web niche breadth resource utilization stocking ratio |
| title | Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs |
| title_full | Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs |
| title_fullStr | Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs |
| title_full_unstemmed | Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs |
| title_short | Resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs |
| title_sort | resources utilization and trophic niche between silver carp and bighead carp in two mesotrophic deep reservoirs |
| topic | stable isotope food web niche breadth resource utilization stocking ratio |
| url | http://dx.doi.org/10.1080/02705060.2018.1560368 |
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