|Population dynamics of Tisbe holothuriae (Copepoda; Harpacticoida) in exploited mass cultures|
Gaudy, R.; Guerin, J.P. (1982). Population dynamics of Tisbe holothuriae (Copepoda; Harpacticoida) in exploited mass cultures. Neth. J. Sea Res. 16: 208-216
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
|Authors|| || Top |
Three cultures of Tisbe holothuriae in 10 l tanks were harvested each 7 or 10 to 12 days at a rate of 50%. The most frequently harvested culture showed the highest yield. At lower exploitation rates a higher rate of sea water renewal resulted in a higher production. In the cultures, variations in sex ratio, ovigerous rate, and number of eggs per sac contributed to a stabilization of the egg production. More frequent harvesting favoured the ovigerous rate and a higher renewal rate of the medium resulted in more eggs per sac. The growth rate of the population was estimated from calculated values for birth rate and death rate, and this estimate was compared with the observed growth rate. The quality of the sea water medium in mass cultures was investigated and discussed in its effects on population dynamics.