Maximum handling size, prey size and type selection by snakehead (Channa argus) feeding on juvenile Chinese mitten crab (Eriocheir sinensis)

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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, Mingzhong 1,2; Zhang, Tanglin 1; Li, Zhongjie 1; Liu, Jiashou 1
刊名	AQUACULTURE RESEARCH
	2014-03-01
卷号	45 期号:4 页码:720-727
关键词	snakehead maximum handling size feeding Chinese mitten crab prey selection
ISSN号	1355-557X
通讯作者	Zhang, TL (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.
中文摘要	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.
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.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Fisheries
研究领域[WOS]	Fisheries
关键词[WOS]	INTERTIDAL BARNACLE ; FORAGING ECOLOGY ; CAPTURE SUCCESS ; PREDATION ; FISH ; RECRUITMENT ; PREFERENCE ; EFFICIENCY ; PERCH ; INVERTEBRATES
收录类别	SCI
资助信息	National Natural Science Foundation of China [30830025, 30970553]; R & D Project of the Ministry of Science and Technology of China [2012BAD25B05, 2012BAD25B08]
语种	英语
WOS记录号	WOS:000332415000014
公开日期	2014-08-07
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20020]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
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
推荐引用方式 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.(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.