Stock-recruitment (S-R) relationships are the centrepiece of fisheries management aimed at achieving maximum sustainable yield (MSY). Here we consider the possibility that the density dependence evident in S-R relations is controlled by feeding interactions alone. We simulate a food-web model with dynamic representations of intra- and interspecific size structure and a linear relation between food intake and hatchling production of adults. Population sizes of individual stocks are modified by imposing additional mortality. The predominant functional forms and the steepness of resulting S-R relationships agree well with observations. We conclude that recruitment is plausibly regulated by feeding interactions alone.
- Recruitment, Food-Web, Maximum Sustainable Yield, Modelling, life history, steepness, Deriso-Schnute model
ASJC Scopus subject areas
- Aquatic Science
- Ecology, Evolution, Behavior and Systematics