Individual Based Model for Grouper Populations
Authored by Miled Slimane Ben, Amira Kebir, Moulay Lhassan Hbid
Date Published: 2010
DOI: 10.1007/s10441-010-9105-x
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Abstract
Dusky groupers (Epinephelus marginatus) are characterized by a complex
sex allocation strategies and overexploitation of bigger individuals. We
developed an individual based model to investigate the long-term effects
of density dependence on grouper population dynamics and to analyze the
variabilities of extinction probabilities as a result of interacting
mortalities at different life stages. We conduct several simulations
with different forms of sex allocation functions and different
combinations of mortality rates. The model was parametrized using data
on dusky grouper populations from the literature. The most important
insights produced by this simulation study are that density dependence
of sex allocation is an evolutionarily stable strategy, increases the
population biomass, mitigates the effect of the removal of large male
and indicates a need for protection of females and flexible stages.
Tags
Competition
growth
Size
Animals
Social-control
Epinephelus-marginatus lowe
Bidirectional sex-change
Advantage model
Dusky grouper
Hermaphroditism