Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China
Ontogenetic niche shifts have played an important role in the life history and ecological functions of fish. The clearhead icefish (Protosalanx chinensis, Basilewsky, 1855) is a small, pelagic, and commercially important fish that mainly feeds on zooplankton and will transition to feeding on fish wh...
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ftmdpi:oai:mdpi.com:/2073-4441/15/10/1847/ 2023-08-20T04:07:18+02:00 Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China Haoyu Zeng Fujiang Tang Zhe Li Wanqiao Lu Yi Zheng agris 2023-05-12 application/pdf https://doi.org/10.3390/w15101847 EN eng Multidisciplinary Digital Publishing Institute Water, Agriculture and Aquaculture https://dx.doi.org/10.3390/w15101847 https://creativecommons.org/licenses/by/4.0/ Water; Volume 15; Issue 10; Pages: 1847 Protosalanx chinensis feeding selectivity cladocera copepoda diet shift Text 2023 ftmdpi https://doi.org/10.3390/w15101847 2023-08-01T10:03:08Z Ontogenetic niche shifts have played an important role in the life history and ecological functions of fish. The clearhead icefish (Protosalanx chinensis, Basilewsky, 1855) is a small, pelagic, and commercially important fish that mainly feeds on zooplankton and will transition to feeding on fish when prey fish are available, though its life span is only about one year. In fact, we know little about the food selectivity and diet shifting of P. chinensis before its transition to feeding on fish. To reveal the food selectivity of P. chinensis before its transition to feeding on fish, the gut contents and environmental zooplankton community were investigated simultaneously in Lake Dalong of Northeastern China from April to June 2021. The results showed that P. chinensis experienced a diet shift from copepoda to cladocera during spring in Lake Dalong. From April to early June, both the size of cladocera and copepoda in guts increased as the size of P. chinensis increased. However, the favorite category changed to the smaller cladocera in late June, when the density of the smaller cladocera was rather high relatively. Considering June was the critical period for P. chinensis to prepare for transitioning to feeding on fish, the food resources availability must be seriously considered for sustainable aquaculture of P. chinensis. It was hypothesized that there was a trade-off of feeding selectivity between the size and density of the prey. Text Icefish MDPI Open Access Publishing Water 15 10 1847 |
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Protosalanx chinensis feeding selectivity cladocera copepoda diet shift |
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Protosalanx chinensis feeding selectivity cladocera copepoda diet shift Haoyu Zeng Fujiang Tang Zhe Li Wanqiao Lu Yi Zheng Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China |
topic_facet |
Protosalanx chinensis feeding selectivity cladocera copepoda diet shift |
description |
Ontogenetic niche shifts have played an important role in the life history and ecological functions of fish. The clearhead icefish (Protosalanx chinensis, Basilewsky, 1855) is a small, pelagic, and commercially important fish that mainly feeds on zooplankton and will transition to feeding on fish when prey fish are available, though its life span is only about one year. In fact, we know little about the food selectivity and diet shifting of P. chinensis before its transition to feeding on fish. To reveal the food selectivity of P. chinensis before its transition to feeding on fish, the gut contents and environmental zooplankton community were investigated simultaneously in Lake Dalong of Northeastern China from April to June 2021. The results showed that P. chinensis experienced a diet shift from copepoda to cladocera during spring in Lake Dalong. From April to early June, both the size of cladocera and copepoda in guts increased as the size of P. chinensis increased. However, the favorite category changed to the smaller cladocera in late June, when the density of the smaller cladocera was rather high relatively. Considering June was the critical period for P. chinensis to prepare for transitioning to feeding on fish, the food resources availability must be seriously considered for sustainable aquaculture of P. chinensis. It was hypothesized that there was a trade-off of feeding selectivity between the size and density of the prey. |
format |
Text |
author |
Haoyu Zeng Fujiang Tang Zhe Li Wanqiao Lu Yi Zheng |
author_facet |
Haoyu Zeng Fujiang Tang Zhe Li Wanqiao Lu Yi Zheng |
author_sort |
Haoyu Zeng |
title |
Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China |
title_short |
Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China |
title_full |
Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China |
title_fullStr |
Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China |
title_full_unstemmed |
Feeding Selectivity and Diet Shift of Protosalanx chinensis during Spring in Lake Dalong, Northeastern China |
title_sort |
feeding selectivity and diet shift of protosalanx chinensis during spring in lake dalong, northeastern china |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/w15101847 |
op_coverage |
agris |
genre |
Icefish |
genre_facet |
Icefish |
op_source |
Water; Volume 15; Issue 10; Pages: 1847 |
op_relation |
Water, Agriculture and Aquaculture https://dx.doi.org/10.3390/w15101847 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w15101847 |
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Water |
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15 |
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10 |
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1847 |
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