|Title:||Formation of melanocyte spheroids on the chitosan-coated surface||Authors:||Lin, Sung-Jan
|Keywords:||Ecotoxicology;Demography;Population dynamics;Zinc;Abalone||Issue Date:||19-Aug-2004||Publisher:||Taipei:National Taiwan University Dept Chem Engn||Source:||Aquaculture 242 (2004)||Journal Volume:||365||Journal Issue:||380||Start page/Pages:||-||Abstract:||
A stage-classified demographic method was performed to investigate the effects of increased
waterborne zinc (Zn) concentrations on the population dynamics of abalone Haliotis diversicolor
supertexta. We reanalyzed the results of a 7-day acute and a 28-day chronic toxicity bioassays to
examine the survival and growth performances when exposing abalone to different levels of zinc
stresses. An energy-based biological approach was adopted to model the effects of zinc on fecundity.
These data provided stage-specific schedules of vital rates that were used to parameterize a
projection matrix model for abalone. Simulations were carried out to produce temporal population
abundance changes under seven exposure scenarios including a control group and six treated cohorts
ranged from 0.03 to 1 mg l1 Zn. Model manipulations indicated that a reduction of individual
growth rate was observed at an exposed Zn concentration greater than 0.12 mg l1, whereas the
significant influence of survivorship was occurred until the Zn concentration reached 0.25 mg l1.
For all treatments, Zn induced a slight decrease in fecundity. The asymptotic population growth rate
decreased from k=1.00 for the control group to k=0.9968 for abalone population exposed to 1 mg
l1 Zn, indicating a potential risk of population intrinsic growth rates for abalone exposed to higher
levels of waterborne Zn. These findings provide a pivotal effort for setting of the ambient water
quality criterion for protecting the aquacultural species.
|Appears in Collections:||生物環境系統工程學系|
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