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Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis)
Luo, Mingzhong1,2; Zhang, Tanglin1; Li, Zhongjie1; Liu, Jiashou1; Zhang, TL (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
2014-03-01
Source PublicationAQUACULTURE RESEARCH
ISSN1355-557X
Volume45Issue:4Pages:720-727
AbstractLaboratory 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.; 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.
SubtypeArticle
KeywordSnakehead Maximum Handling Size Feeding Chinese Mitten Crab Prey Selection
Department[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
DOI10.1111/are.12014
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08] ; National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08] ; National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08] ; National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08]
Indexed BySCI
Language英语
WOS Research AreaFisheries
WOS SubjectFisheries
WOS IDWOS:000332415000014
WOS KeywordINTERTIDAL BARNACLE ; FORAGING ECOLOGY ; CAPTURE SUCCESS ; PREDATION ; FISH ; RECRUITMENT ; PREFERENCE ; EFFICIENCY ; PERCH ; INVERTEBRATES
Funding OrganizationNational Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08] ; National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08] ; National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08] ; National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08]
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/20020
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorZhang, TL (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
Affiliation1.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
GB/T 7714
Luo, Mingzhong,Zhang, Tanglin,Li, Zhongjie,et al. Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis)[J]. AQUACULTURE RESEARCH,2014,45(4):720-727.
APA Luo, Mingzhong,Zhang, Tanglin,Li, Zhongjie,Liu, Jiashou,&Zhang, TL .(2014).Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis).AQUACULTURE RESEARCH,45(4),720-727.
MLA Luo, Mingzhong,et al."Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis)".AQUACULTURE RESEARCH 45.4(2014):720-727.
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