David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
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Biology and Philosophy 22 (2):247-266 (2007)
Speciation is an aspect of evolutionary biology that has received little philosophical attention apart from articles mainly by biologists such as Mayr (1988). The role of speciation as a terminus a quo for the individuality of species or in the context of punctuated equilibrium theory has been discussed, but not the nature of speciation events themselves. It is the task of this paper to attempt to bring speciation events into some kind of general scheme, based primarily upon the work of Sergey Gavrilets on adaptive landscapes, using migration rate, or gene flow, as the primary scale, and concluding that adaptive and drift explanations are complementary rather than competing. I propose a distinction between intrinsic and extrinsic selection, and the notion of reproductive reach and argue that speciation modes should be discriminated in terms of gene flow, the nature of selection maintaining reproductive reach, and whether the predominant cause is selective or stochastic. I also suggest that the notion of an adaptive “quasispecies” for asexual species is the primitive notion of species, and that members of reproductively coherent sexual species are additionally coadapted to their mating partners.
|Keywords||History & Philosophy Of Science species speciation adaptive landscape gavrilets Lizards Genus Cnemidophorus Sympatric Speciation Mole-rats Hybridization Populations Controversy Divergence Radiation Traits Time|
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References found in this work BETA
Ernst Mayr (1963). Animal Species and Evolution. Belknap of Harvard University Press.
Ernst Mayr (1988). Toward a New Philosophy of Biology: Observations of an Evolutionist. Belknap Press of Harvard University Press.
Richard Boyd (1999). Homeostasis, Species, and Higher Taxa. In R. A. Wilson (ed.), Species: New Interdisciplinary Essays. MIT Press 141-85.
Peter Gärdenfors (2002). Conceptual Spaces. The Geometry of Thought. Tijdschrift Voor Filosofie 64 (1):180-181.
Robert Boyd (1999). Kinds, Complexity, and Multiple Realization. Philosophical Studies 95 (1-2):67-98.
Citations of this work BETA
John S. Wilkins (2008). The Adaptive Landscape of Science. Biology and Philosophy 23 (5):659-671.
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