Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 561861
Title Evolution of placentas in the fish family poeciliidae : An empirical study of macroevolution
Author(s) Pollux, B.J.A.; Pires, M.N.; Banet, A.I.; Reznick, D.N.
Source Annual Review of Ecology, Evolution, and Systematics 40 (2009). - ISSN 1543-592X - p. 271 - 289.
Publication type Refereed Article in a scientific journal
Publication year 2009
Keyword(s) Genomic imprinting - Matrotrophy - Parent-offspring conflict - Placentotrophy - Superfetation - Viviparity-driven conflict hypothesis

The placenta is a complex organ that mediates all physiological and endocrine interactions between mother and developing embryos. Placentas have evolved throughout the animal kingdom, but little is known about how or why the placenta evolved. We review hypotheses about the evolution of placentation and examine empirical evidence in support for these hypotheses by drawing on insights from the fish family Poeciliidae. The placenta evolved multiple times within this family, and there is a remarkable diversity in its form and function among closely related species, thus providing us with ideal material for studying its evolution. Current hypotheses fall into two categories: adaptive hypotheses, which propose that the placenta evolved as an adaptation to environmental pressures, and conflict hypotheses, which posit that the placenta evolved as a result of antagonistic coevolution. These hypotheses are not mutually exclusive. Each may have played a role at different stages of the evolutionary process.

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