نتایج جستجو برای: predator larval stage
تعداد نتایج: 390130 فیلتر نتایج به سال:
We investigate a predator-prey model with stage structure for the predator and periodic constant impulsive perturbations. Conditions for extinction of prey and immature predator are given. By using the Floquet theory and small amplitude perturbation skills, we consider the local stability of prey, immature predator eradication periodic solution. Furthermore, by using the method of numerical sim...
Factors such as temperature, habitat, larval density, food availability and food quality substantially affect organismal development. In addition, risk of predation has a complex impact on the behavioural and morphological life history responses of prey. Responses to predation risk seem to be mediated by physiological stress, which is an adaptation for maintaining homeostasis and improving surv...
Predicting the myriad effects of climate change on ecological communities is a major challenge for scientists, and to date relatively few studies have focused sea freshening species interactions. In particular, changes in keystone predatory could be pervasive. Here, we assess consequences decreasing salinity impact exerted by star, Asterias rubens. We quantified star functional responses (FRs; ...
Stage dependent predation may give rise to the hydra effect--the increase of predator density at equilibrium as its mortality rate is raised. Management strategies that adjust predator harvest rates or quotas based on responses of populations to past changes in capture rates may eventually lead to a catastrophic collapse of predator species. A proposed threshold management policy avoids the hyd...
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