Effect of temperature on the development, growth, survival and settlement of green mussel Perna viridis (Linnaeus, 1758)

摘要

The effect of temperature on the development, growth, survival and settlement of Perna viridis was studied under controlled conditions to provide information needed for the development of commercial hatchery technology for green mussel P. viridis. Total mortality of the larvae occurred after 24 h at temperatures of 33 degreesC and 35 degreesC. At 24 degreesC, larvae took longer to settle than at temperatures of 27 degreesC, 29 degreesC and 31 degreesC. For optimum larval development (8-13 h), growth (17.2 +/- 0.84 mum day(-1)) and survival (55.2 +/- 0.84%), a hatchery rearing temperature of 31 degreesC is required. For settlement no significant difference was seen between the percentage settlement at 29 degreesC (49.3 +/- 3.34%) and 31 degreesC (45.8 +/- 1.76%). However, the process of settlement began and ended earlier at 29 degreesC (from 15 to 18 days) than at 31 degreesC (from 18 to 20 days). Thus for larval settlement a temperature of 29 degreesC is recommended.