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Full-Text Articles in Life Sciences
The Effects Of Oil Well Sites On Forest Species Of Birds, Wendy J. Baker
The Effects Of Oil Well Sites On Forest Species Of Birds, Wendy J. Baker
Masters Theses
Fifty censuses were taken in 9 transects adjacent to 8 oil well openings. It was found that 2 species, the red-eyed vireo (Vireo olivaceus), and the ovenbird (Seiurus aurocapilus) were significantly affected in spatial distribution. These forest species had significantly lower numbers near the oil well site than in the forest. Two other forest species suggested the same pattern. The effect of the oil well site reaches well into the forest.
Other possible effects of the oil well sites are competition with edge species and brood parasitism by the brown-headed cowbird. Noisier sites may also affect the bird community within …
Some Potential Evolutionary Costs Associated With Paternal Care In The Water Bug Belostoma Flumineum Say, Larry Johnson
Some Potential Evolutionary Costs Associated With Paternal Care In The Water Bug Belostoma Flumineum Say, Larry Johnson
Masters Theses
Female water bugs (Belostoma flumineum) deposit eggs in a mucilaginous cement on the back of conspecific males, who then brood these eggs until hatching. Sex role reversal, in which females compete for males and males are discriminating, is predicted in this species because males provide parental care exclusively, and represent a limited resource. Presumably the advantage of this paternal behavior is increased survival of young. However, the potential exists for this egg-brooding behavior to incur evolutionary costs, and quantifying some of these costs was the thrust of this study.
One cost, a loss of polygynous opportunity, was investigated …