A trade-off-invariant life-history rule for optimal offspring size
Article Abstract:
A new evolutionary ecology model generates the optimal offspring size without consideration of specific trade-offs but rather a numerical basis. Life history evolution appears to follow a universal -1 inverse proportionality exponent between litter size and offspring size as well as survival. The model is based on the largest offspring compared to the available resources and number of siblings. Though the -1 exponent does not change, the proportionality constant varies between higher taxa species such as when reptiles are compared to mammals.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Creatures from another world
Article Abstract:
Genetic experiments were undertaken by Lenski and colleagues using digital organisms created in a computer. The results are claimed to support the idea that complex interactions between multiple mutations are a general feature of genetic systems. The experiments change parameters and have advantages over the conventional biologist, with all relevant data recorded without error. Selective pressures were manipulated so that simple and complex digital organisms evolved.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Hox genes, fin folds and symmetry
Article Abstract:
There is no evidence that the pelvic limb evolved before the pectoral limb, and considerable evidence for the reverse, possibly due to phylogenetic recapitulation. C. Tabin and E. Laufer do not adequately explain the fin-folding mechanism. The transition from fin fold to a secondary axis may have several explanations. Not enough is known about expression of the Hox gene, and it needs further study.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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