Open AccessEffects of Algae and Shell Pigment Extract‐supplemented Diets on Shell Pigmentation and Growth Performance of Pacific Abalone, Haliotis discus hannai
Author(s) -
Ju Zhi Yong,
Deng DongFang,
Viljoen Cecilia,
Forster Ian Paul
Publication year - 2017
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12343
Subject(s) - abalone , haliotis discus , biology , zoology , spirulina (dietary supplement) , aquaculture , fishery , porphyra , feed conversion ratio , haliotis , juvenile , algae , food science , shellfish , botany , body weight , aquatic animal , ecology , fish <actinopterygii> , raw material , endocrinology
To improve shell pigmentation and growth performance of Pacific abalone, five extruded diets were prepared by supplementing a formulated control diet with 3% each of three species of algae (Pacific dulse, Porphyra yezoensis , Spirulina) and a pigment extract from the abalone shells (0.02%). Each of the five diets and a commercial feed were randomly assigned to three containers each stocked with 1000 juvenile Pacific abalone (2 g per individual) in a flow‐through seawater system for a 5‐mo feeding trial. Test results showed: (1) all the supplements significantly ( P < 0.05) increased percentages of dark‐brown shelled abalone in the test treatments, relative to the control treatment; (2) the abalone fed the experimental diets achieved significantly ( P < 0.05) greater final weight, shell‐length growth rates, and higher meat protein contents than those fed the commercial feed ( P < 0.05); and (3) the abalone fed the Spirulina‐supplemented diet achieved the best overall growth, pigmentation performances, and feed conversion ratio; and the Pacific dulse supplement generated the highest protein content in abalone meat product ( P < 0.05) among the tested diets. These results demonstrate the potential of locally made feed, which can generate desirable characteristics in abalone under aquaculture conditions.