flag flag  

Search all repositories
add criteria
Close advanced options Search for

 

Enter more search criteria
Publication Date
     
From
To
Document Language
Document Type
Repositories
New Search Save Search Refine Search
Results
author = "Persson, Lennart"
1 2 > >>

Found 13 documents, displaying page 1 of 2

Individual diet specialization, niche width and population dynamics : implications for trophic polymorphisms

Author(s) : Svanbäck, Richard , Persson, Lennart
Description :

1. We studied a perch Perca fluviatilis L. population that during a 9-year period switched between a phase of dominance of adult perch and a phase dominated by juvenile perch driven by cannibalism and intercohort competition. We investigated the effects of these population fluctuations on indivi...

Repository : Publikationer från Uppsala universitet
Language(s) : English

A Spatial Dimension of Ecology: Ilkka Hanski Crafoord Laureate in 2011

Author(s) : Eriksson, Ove , Persson, Lennart
Description :
Repository : Europe PubMed Central
Language(s) : English

Size-dependent life-history traits promote catastrophic collapses of top predators

Author(s) : De Roos, André M. , Persson, Lennart
Description : Catastrophic population collapses such as observed in many exploited fish populations have been argued to result from depensatory growth mechanisms (i.e., reduced reproductive success at low population densities, also known as Allee effect). Empirical support for depensation from population-level da...
Repository : Europe PubMed Central
Language(s) : English

How does stochasticity affect evolutionary regime shifts in age and size at maturation?

Author(s) : Boukal, David S. , Roos, Andre M. de , Persson, Lennart
Description : Fish in many exploited stocks grow faster and mature earlier at either larger or smaller sizes in comparison to pre-exploitation periods. These changes can be driven by both genetic and phenotypic responses. We have shown recently that their interplay can lead to irreversible evolutionary regime shi...
Repository : NORA (Norwegian Open Research Archives)
Language(s) : English

Comparative support for the niche variation hypothesis that more generalized populations also are more heterogeneous

Author(s) : Bolnick, Daniel , Svanbäck, Richard , Araujo, Mario , Persson, Lennart
Description : There is extensive evidence that some species of ecological generalists, which use a wide diversity of resources, are in fact heterogeneous collections of relatively specialized individuals. This within-population variation, or "individual specialization," is a key requirement for frequency-depe...
Repository : Publikationer från Uppsala universitet
Language(s) : English

Evolutionary regime shifts in age and size at maturation of exploited fish stocks

Author(s) : de Roos, André M , Boukal, David S , Persson, Lennart
Description : Worldwide declines of fish stocks raise concerns about deleterious consequences of harvesting for stock abundances and individual life histories, and call for appropriate recovery strategies. Fishes in exploited stocks mature earlier at either larger or smaller sizes due to both genetic and plastic ...
Repository : Europe PubMed Central
Language(s) : English

Population dynamic theory of size-dependent cannibalism.

Author(s) : Claessen, David , de Roos, André M , Persson, Lennart
Description : Cannibalism is characterized by four aspects: killing victims, gaining energy from victims, size-dependent interactions and intraspecific competition. In this review of mathematical models of cannibalistic populations, we relate the predicted population dynamic consequences of cannibalism to its fou...
Repository : Europe PubMed Central
Language(s) : English

Predicting shifts in dynamics of cannibalistic field populations using individual-based models.

Author(s) : Persson, Lennart , de Roos, André M , Bertolo, Andrea
Description : The occurrence of qualitative shifts in population dynamical regimes has long been the focus of population biologists. Nonlinear ecological models predict that these shifts in dynamical regimes may occur as a result of parameter shifts, but unambiguous empirical evidence is largely restricted to lab...
Repository : Europe PubMed Central
Language(s) : English

Emergent Allee effects in top predators feeding on structured prey populations.

Author(s) : de Roos, André M , Persson, Lennart , Thieme, Horst R
Description : Top predators that forage in a purely exploitative manner on smaller stages of a size-structured prey population have been shown to exhibit an Allee effect. This Allee effect emerges from the changes that predators induce in the prey-population size distribution and represents a feedback of predator...
Repository : Europe PubMed Central
Language(s) : English

Comparative support for the niche variation hypothesis that more generalized populations also are more heterogeneous

Author(s) : Bolnick, Daniel I. , Svanbäck, Richard , Araújo, Márcio S. , Persson, Lennart
Description : There is extensive evidence that some species of ecological generalists, which use a wide diversity of resources, are in fact heterogeneous collections of relatively specialized individuals. This within-population variation, or “individual specialization,” is a key requirement for frequency-dependen...
Repository : Europe PubMed Central
Language(s) : English
1 2 > >>

Found 13 documents, displaying page 1 of 2