Outbreeding Alleviates Senescence in Hermaphroditic Snails as Expected from the Mutation-Accumulation Theory
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چکیده
منابع مشابه
Outbreeding Alleviates Senescence in Hermaphroditic Snails as Expected from the Mutation-Accumulation Theory
Senescence, the decline in fitness components of an organism with age [1], is a nearly universal characteristic of living beings [2-6]. This ubiquity is challenging because natural selection does not favor the evolution of traits decreasing fitness [1, 7, 8]. Senescence may result from two nonexclusive mechanisms: the accumulation of deleterious mutations acting late in life, when the strength ...
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The bit-string model of biological aging is used to simulate the catastrophic senescence of Paciic Salmon. We have shown that reproduction occuring only once and at a xed age is the only ingredient needed to explain the catastrophic senescence according the mutation accumulation theory. Several results are presented, some of them with up to 10 8 shes, showing how the survival rates in catastrop...
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Promoted by sexual selection, males usually adopt different ways to increase their fertilization chances. In many insect taxa males donate nuptial gifts, together with sperm, which represent a valuable additional nutrient source that females can use to provision eggs. This has also been suggested to occur in simultaneous hermaphrodites, organisms with both sex functions. In theory, donation of ...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2008
ISSN: 0960-9822
DOI: 10.1016/j.cub.2008.04.070