Effect of temperature on
hatching success and size of striped trumpeter (Latris lineata)
larvae
D.T. Morehead, P.R. Hart-2003
Aquaculture, 220(1-4): 595-606
Abstract:
Egg samples were collected from captive striped
trumpeter maintained under phase-shifted and simulated ambient photothermal
regimes and incubated at 9, 10, 11, 12, 13, 14, 15 or 16 °C. No eggs
hatched at 9 °C. Time to hatch decreased from 9.6 to 4.2 days as
temperature increased from 10 to 16 °C. Survival to hatch was low at 10 and
11 °C, but similar within the range 12–16 °C. Larval length at hatching
was greatest at 14 °C, with no significant difference in yolk volume or
muscle depth at vent across the range of temperatures. The results of our
study suggest that the optimal temperature for the incubation of striped
trumpeter eggs is 14 °C, which is higher than found previously.
(Marine Research Laboratories and CRC for
Aquaculture, Tasmanian Aquaculture and Fisheries Institute, University of
Tasmania, GPO Box 252C, Hobart, Tasmania 7001, Australia, e-mail: david.morehead@dpiwe.tas.gov.au)