Production of the limpet Collisella heroldi population in an intertidal rocky shore in southern Hokkaido [Japan]
1994
Niu, C.J. (Hokkaido Univ., Hakodate (Japan). Faculty of Fisheries) | Nakao, S. | Goshima, S.
The body weight of 0 year individuals of the limpet Collisella heroldi increased throughout the year, while that of the over 1 year adults changed distinctly in accordance with its reproductive cycle. Somatic tissues of the adults showed decrease during the developmental period of the gonads, fast increment after spawning (October-December), and almost no growth during winter. Changes in the energy content of the somatic tissues also showed a reverse relationship with the gonads. Energy allocated to somatic storage declines with age from 90% to 35% for 0-5 year old animals while energy transferred to gonads increases with age from 5% to 64%. The energy transferred to the shell varied from 5% to 1% according to age from 0 to 5 year. Mean annual productions during the study period were 4.74 and 1.12 Cal/centiare for Pr and Pg, respectively. The mean P/B turn-over rate was 1.67
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