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题名: Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis)
作者: Luo, Mingzhong1, 2; Zhang, Tanglin1; Li, Zhongjie1; Liu, Jiashou1
通讯作者: Zhang, TL (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
关键词: snakehead ; maximum handling size ; feeding ; Chinese mitten crab ; prey selection
刊名: AQUACULTURE RESEARCH
发表日期: 2014-03-01
DOI: 10.1111/are.12014
卷: 45, 期:4, 页:720-727
收录类别: SCI
文章类型: Article
部门归属: [Luo, Mingzhong ; Zhang, Tanglin ; Li, Zhongjie ; Liu, Jiashou] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China ; [Luo, Mingzhong] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08]
类目[WOS]: Fisheries
研究领域[WOS]: Fisheries
摘要: Laboratory predation trials were conducted to investigate maximum handling size, prey size and type selection by small (35-37cm in total length, L-T), medium (43-46cm L-T) and larger (58-60cm L-T) snakehead (Channa argus) when feeding on a wide size (9-34mm in carapace width, C-W) range of juvenile Chinese mitten crab (Eriocheir sinensis). The maximum handling size of predator feeding on crabs monotonically increased with predator L-T and mouth gape width, G(W). Snakehead with at least 16.0cm L-T or 27.7mm G(W) would be capability to consume the smallest size group of crabs, whereas the predator with 72.6cm L-T or 63.4mm G(W) would be capability to consume all size groups of crabs in these trails. Prey-size selection trials showed that snakehead has a high preference to the small-sized crabs, and lower preference to the medium or large size crabs. The preference index was significantly affected by prey size and prey size x predator size interaction, however, was not affected by predator size. In prey type experiments, snakehead consumed lower proportions of juvenile crabs when fed on the crab and crucian carp than when fed on only the crab, which suggests alternative fish prey may reduce predation risk of the crab by snakehead in nature. These results could be useful for improving the fishery management and release strategies for the crab.
英文摘要: Laboratory predation trials were conducted to investigate maximum handling size, prey size and type selection by small (35-37cm in total length, L-T), medium (43-46cm L-T) and larger (58-60cm L-T) snakehead (Channa argus) when feeding on a wide size (9-34mm in carapace width, C-W) range of juvenile Chinese mitten crab (Eriocheir sinensis). The maximum handling size of predator feeding on crabs monotonically increased with predator L-T and mouth gape width, G(W). Snakehead with at least 16.0cm L-T or 27.7mm G(W) would be capability to consume the smallest size group of crabs, whereas the predator with 72.6cm L-T or 63.4mm G(W) would be capability to consume all size groups of crabs in these trails. Prey-size selection trials showed that snakehead has a high preference to the small-sized crabs, and lower preference to the medium or large size crabs. The preference index was significantly affected by prey size and prey size x predator size interaction, however, was not affected by predator size. In prey type experiments, snakehead consumed lower proportions of juvenile crabs when fed on the crab and crucian carp than when fed on only the crab, which suggests alternative fish prey may reduce predation risk of the crab by snakehead in nature. These results could be useful for improving the fishery management and release strategies for the crab.
关键词[WOS]: INTERTIDAL BARNACLE ; FORAGING ECOLOGY ; CAPTURE SUCCESS ; PREDATION ; FISH ; RECRUITMENT ; PREFERENCE ; EFFICIENCY ; PERCH ; INVERTEBRATES
语种: 英语
WOS记录号: WOS:000332415000014
ISSN号: 1355-557X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/20020
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Luo, Mingzhong; Zhang, Tanglin; Li, Zhongjie; Liu, Jiashou.Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis),AQUACULTURE RESEARCH,2014,45(4):720-727
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