Ch. Koh et al., SIZE DISTRIBUTION, GROWTH AND PRODUCTION OF SARGASSUM-THUNBERGII IN AN INTERTIDAL ZONE OF PADORI, WEST-COAST OF KOREA, Hydrobiologia, 261, 1993, pp. 207-214
This paper considers an estimation of population parameters by mathema
tical equations on the basis of size distribution and biomass obtained
from a field survey. Sargassum thunbergii, a dominant alga in the sur
f zone of Korean coast, was investigated from June 1990 to August 1991
. We divided the population into interval groups according to the time
of recruitment. A separation of the population by age or size was imp
ossible because of difficulties arising from continuous recruitment ov
er the growing season. The basic idea for the solution is based on the
assumption that the estimated values of the growth rate, number of bi
rths and deaths reflect real values, if the biomass and coefficient of
variation obtained from the field investigation are coincident with t
hose calculated by equations. The predicted behavior of the population
is as follows: the proportion of numbers of recruits is large, but th
e contribution of recruits to biomass and production is insignificant,
and the growth curve shows a sigmoid pattern.