Premium
Prediction of cannibalism in juvenile black rockfish, Sebastes schlegelii (Hilgendorf, 1880), based on morphometric characteristics and paired trials
Author(s) -
Xi Dan,
Zhang Xiumei,
Lü Hongjian,
Zhang Zhixin
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13150
Subject(s) - rockfish , sebastes , biology , juvenile , cannibalism , scorpaenidae , predation , fishery , zoology , fish <actinopterygii> , ecology
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.