Essays about: "density dependent mortality"

Showing result 6 - 8 of 8 essays containing the words density dependent mortality.

  1. 6. Influence of the habitat on the potential for cannibalism and population dynamics in stream-dwelling European grayling (Thymallus thymallus L.)

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Carl-Johan Lindström; [2010]
    Keywords : cannibalism; European grayling; Thymallus thymallus; habitat mapping; Jämtland; population dynamics; recruitment; size structured population model; stream environment;

    Abstract : Cannibalism can have major influence on fish population dynamics. A prerequisite for cannibalism is that the cannibal and the potential victim meet, and besides density effects, the encounter rate between cannibals and their victims is therefore also largely dependent on habitat use and habitat heterogeneity. READ MORE

  3. 7. Models of individual tree mortality for trembling aspen, lodgepole pine, hybrid spruce and subalpine fir in northwestern British Columbia

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Sören Möller Pedersen; [2007]
    Keywords : tree mortality; density dependent mortality; statistical models; SORTIE-ND; British Columbia; sub-boreal spruce zone;

    Abstract : Density dependent mortality is an important process in forest succession. The overall predictive abilities of forest simulation models are closely related to their ability to predict mortality. Finding appropriate methods for modelling mortality have often proved to be a difficult challenge. READ MORE

  4. 8. Effects of refuge availability on growth and survival of YOY Arctic char (Salvelinus alpinus)

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Per Nilsson; [2006]
    Keywords : Arctic char; growth; predation; refuge; yoy; cannibalism; survival; shelter;

    Abstract : Risk of predation induces behavioural responses in prey, such as decreased activity and avoidance of risky habitats. Sheltering by prey in low risk habitat not only constrains the physical area but also the accessibility of resources. Hence, variation in refuge availability affects the performance of refuging individuals. READ MORE