Debprasad Pal

TL;DR: A tri-trophic food chain is analyzed and it is shown that searching for a general theory to unify the harvesting induced stability must take into account the number of trophic levels and the degree of species enrichment, the outcomes that cannot be obtained from the earlier reports on prey-predator models.

TL;DR: This article addresses how depleted stock can be restored by creation of marine reserve and species mobility when alternative stable states persist in a marine ecosystem and develops a two-patch version of an originally single-patch model to understand the role of a marine protected area.

TL;DR: A dynamical system model of food chain showing a stable steady state is proposed and the variation of stock of targeted species with increasing mortality is estimated and some results show that the unique stable steadyState in the model remains stable under harvesting of either trophic level.

TL;DR: It is shown that a variety of patterns are possible based on the intensity of efforts distributed among different trophic levels, and it is suggested that fishing down the food chain, as suggested by Pauly et al. is not bound to happen.

TL;DR: A two-predator one-prey system is considered to determine the feedback of exploitation in individual as well as joint population levels to measure both the maximum sustainable yield (MSY) and resilience simultaneously and it is found that for single species harvesting, a prey species-oriented system is capable of producing more yield in compare to any predator- oriented system but for resilience, a predatory system is far behind the others.