One into two will go
Article Abstract:
Sympatric speciation refers to spread of a species within a geographically coexisting population. D.D. Shoemaker and K.G. Ross provide evidence that sympatric speciation occurs in the imported fire ant in the US. Shoemaker and Ross noted that the first ant colonies had only one fertile queen and experimentally introduced queens were killed by workers. After some time, however, colonies with many unrelated queens began appearing and genetic exchange between the colonies became pronounced. An analysis of the different types of gene exchange suggests that such a process has a social component, specifically the acceptance of queens from a monogyne colony by workers from polygyne colony.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Battle of the sexes
Article Abstract:
Several researchers conducted studies on the reproduction processes of guppies to determine possible correlations between sexual conflict and evolutionary change. The results indicate that female guppies choose mates based on coloration and are able to store sperm for future fertilization. As a result female mate preferences have strong influence in the rate speciation in a given guppy population. To counteract this, some males resort to sneaky matings, thereby controlling the rate of speciation.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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