The effects of temperature
on the growth, survival and biomass of different families of juvenile Penaeus
japonicus Bate
G.J. Coman, P.J. Crocos, N.P. Preston, D.
Fielder-2002
Aquaculture, 214(1-4) : 185-199
Abstract:
Variation in the growth, survival and change in total
biomass (termed biomass increase) of different families of juvenile Penaeus
japonicus was investigated over a range of temperatures in controlled
laboratory experiments. In the first experiment, the effects of temperature
on six families of juveniles were examined over a broad range of
temperatures (24 to 30 °C). In the second experiment, the effects of
temperature on six more families of juveniles were examined over a narrower
range of temperatures (27.5 to 31.2 °C). Over the broad temperature range,
mean growth and biomass increase were highest at 27 °C and mean survival
was highest at 24 °C. Mean growth was lowest at 24 °C, whilst survival and
biomass increase were lowest at 30 °C. However, there was a significant
interaction between family and temperature, with some families tolerating a
broader range of temperatures than others. As a result, the ranking of
families in relation to growth, survival and biomass increase changed at
each temperature. This effect was more pronounced for survival than for
growth. Over the narrower range, temperature significantly affected growth,
survival and biomass increase, but there was no significant interaction
between family and temperature. Growth, survival and biomass increase were
significantly lower at 31.2 than at 27.5 and 29.2 °C. These results suggest
that if grow-out conditions for P. japonicus vary by more than a few
degrees, interactions between family and temperature could affect the
efficiency of selection. The results also suggest that the family×temperature
interaction may have a more pronounced effect on survival than on growth.
(CSIRO Marine Research, PO Box 120, QLD 4163,
Australia, e-mail: greg.coman@csiro.au)