FREQUENCY DEPENDENT NATURAL SELECTION DURING CHARACTER DISPLACEMENT IN STICKLEBACKS
نویسندگان
چکیده
منابع مشابه
Frequency dependent natural selection during character displacement in sticklebacks.
We know little about how natural selection on a species is altered when a closely related species consuming similar resources appears in its environment. In a pond experiment with threespine sticklebacks I tested the prediction that divergent natural selection between competitors is frequency-dependent, changing with the distribution of phenotypes in the environment. Differential growth and sur...
متن کاملEcological character displacement and speciation in sticklebacks.
We present evidence of ecological character displacement among species of threespined sticklebacks that inhabit small lakes of coastal British Columbia. Geological data suggest that the populations resulted from multiple divergence and speciation events over the past 13,000 yr. In lakes with two species, one is invariably "limnetic" in morphology and habitat, and the other is "benthic." Other l...
متن کاملExperimental test of predation's effect on divergent selection during character displacement in sticklebacks
Predator addition 5 +benthic 13.91 (0.10) -0.17 – – – – 5 +marine 14.08 (0.07) 6 +benthic 13.61 (0.17) -0.68* 5.56 (0.08) 157 4.85 (0.14) 47 6 +marine 14.29 (0.09) 7 +benthic 14.07 (0.09) -0.04 5.35 (0.07) 279 4.81 (0.14) 90 7 +marine 14.11 (0.10) Predator reduction 1 +benthic 14.08 (0.10) 0.13 5.40 (0.06) 278 4.96 (0.09) 95 1 +marine 13.95 (0.08) 2 +benthic 13.98 (0.09) -0.18 5.16 (0.07) 335 4...
متن کاملExperimental test of predation's effect on divergent selection during character displacement in sticklebacks.
Ecological character displacement is common in nature but the mechanisms causing divergence are not well understood. The contributions of ecological interactions other than competition have received little attention. We conducted a pond experiment to explore the contribution of both competition and predation to character divergence in threespine stickleback species. We estimated the strength of...
متن کاملNatural Selection and Ecological Speciation in Sticklebacks
The idea that selection may be fundamental to the origin of species dates back at least to the synthesis of modern evolutionary theory, being present in the writings of Fisher (1930), Muller (1942), and Dobzhansky (1951). Nevertheless, despite almost three-quarters of a century since the idea was first proposed, little progress has been made in testing the role of selection in speciation (Coyne...
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ژورنال
عنوان ژورنال: Evolution
سال: 2003
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.0014-3820.2003.tb00323.x