Ancestral ecological regime shapes reaction to food limitation in the Least Killifish, Heterandria   formosa.

ABSTRACT: Populations with different densities often show genetically based differences in life histories. The divergent life histories could be driven by several agents of selection, one of which is variation in per-capita food levels. Its relationship with population density is complex, as it depends on overall food availability, individual metabolic demand, and food-independent factors potentially affecting density, such as predation intensity. Here, we present a case study of two populations of a small live-bearing freshwater fish, one characterized by high density, low predation risk, low overall food availability, and presumably low per-capita food levels, and the other by low density, high predation risk, high overall food availability, and presumably high per-capita food levels. Using a labo

SUBMITTER: Felmy A 

PROVIDER: S-EPMC8207351 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature