Effects of temperature on growth and recruitment during early life history of the Japanese sandeel [Ammodytes personatus] in Ise Bay [Japan]
2006
Tomiyama, M.(Aichi-ken. Fisheries Research Inst., Gamagori (Japan)) | Komatsu, T.
Growth of Japanese sandeel Ammodytes personatus (23.7-38.4mm body length) collected in Ise Bay, central Japan, was investigated. The growth trajectories of individual larvae were back-calculated by using the biological intercept method based on the allometric relationship between otolith radius and body length. Because the inner rings are obscurely visible when examined under a biological microscope, we used a scanning electron microscope to identify them. The number of inner rings is higher in years of low temperature (Av. 18.5 deg C) than in years of high temperature (Av. 16.6 deg C). To align temperature to a logistic growth curve, we assumed the linear relationship between growth rate and temperature while keeping the L max constant. By doing so, the logistic growth curve provides a more accurate estimation. From the field data, it was analyzed that high temperature resulted in a high growth rate and a low recruit number.
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