Unequal density dependence between survival and recruitment affects harvesting effectivness Academic Article uri icon

abstract

  • Recruitment and adult‐mortality may respond differently to increased population density. Such unequal density dependence (UDD) is evident for large mammals showing density dependence mainly in recruitment (reproduction rate or juvenile survival), whereas adult survival is high and varies little with density. Mechanistically, UDD is likely influenced by an unequal allocation of resources toward reproduction versus survival. Unequal density dependence is expected to affect compensation abilities, and hence may have serious implications with regard to population harvesting. We modeled UDD by linking population size to reproduction and survival through per capita resource availability and consumption. We integrated UDD into 2 population models (continuous vs. periodic recruitment) and investigated how it affected the compensatory dynamics of populations. For a population …

publication date

  • January 1, 2018