Open AccessEXPERIMENTS ON LARVAL REARING OF THE CALIFORNIA MUSSEL ( Mytilus californianus )
Author(s) -
Trevelyan George A.,
Chang Ernest S.
Publication year - 1983
Publication title -
journal of the world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0735-0147
DOI - 10.1111/j.1749-7345.1983.tb00068.x
Subject(s) - isochrysis galbana , biology , mytilus , larva , mussel , zoology , shellfish , fishery , bivalvia , mollusca , scallop , aquatic animal , ecology , fish <actinopterygii>
Spawning, larval rearing, and settlement of Mytilus californianus were performed over a one‐year period at the University of California, Bodega Marine Laboratory in northern California. A combination of shell scraping followed by a 30 to 60 min immersion in 30 or 60 mM hydrogen peroxide was the most successful spawning stimulus tested. Larvae fed a diet of Isochrysis galbana grew significantly faster than did larvae fed Dunaliella sp. Larval growth rate was significantly more rapid at 20°C than at either 14 or 17°C and no significant differences in mortality rates between these three temperatures were detected. At 17 and 20°C, larvae fed a diet of 80 Isochrysis cells/μ1 daily grew significantly faster than those fed 20 Isochrysis cells/μ1 daily. Mortality of pedi‐veligers was high, but survivors settled and metamorphosed on byssal threads cut from adult M. californianus. Plantigrades had a mean growth rate of 7.8 μm/day between days 15 and 33 following settlement. In this study, a temperature of 20°C, a diet of Isochrysis galbana of at least 80 cells/μ1 daily, and a settlement substrate of byssal threads were the most successful conditions for artificial spat production of this potentially valuable bivalve mollusc.