Prediction of cannibalism in juvenile black rockfish, Sebastes schlegelii (Hilgendorf, 1880), based on morphometric characteristics and paired trials. (7th July 2016)

• Record Type: Journal Article
• Authors: Xi, Dan; Zhang, Xiumei; Lü, Hongjian; Zhang, Zhixin
• Is Part Of: Aquaculture research. Volume 48:Number 6(2017)
• Page Start: 3198
• Page End: 3206
• Publication Date: 2016-07-07
• Subjects: cannibalism -- Sebastes schlegelii -- morphometric characteristics -- paired trials; Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.13150
• Languages: English
• ISSNs: 1355-557X

Abstract

Abstract: To predict the occurrence of cannibalism in the culture of larval black rockfish, Sebastes schlegelii, we developed a regression model based on morphometric measurements. First, 156 black rockfish were measured to obtain a theoretical model, that is L T prey = 0.624 L T cannibal + 0.835. Then, 202 trials of paired fish, together with 31 pairs of cannibalistic fish, were used to revise this model, and the practical model was constructed: L T prey = 0.522 L T cannibal + 4.908 ( R ² = 0.99). According to this equation, the threshold of size ratio was deduced, that is 1.30–1.69, which could be used to grade black rockfish by size and remove potential cannibals.