Laura Burkholder

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-Female salamanders in the suborder Salamandroidea store sperm in cloacal glands called spermathecae. Scanning electron microscopy was used to study these glands in females of the Southern Torrent Salamander, Rhyacotriton variegatus (Rhyacotritonidae), from northern California. Sperm initially enter the cloaca in a tangled mass from the spermatophore cap,(More)
In this article I provide a virtuous slippery slope argument which shows that there is no morally significant difference between passive and active euthanasia. At the top of the slope is an example of passive euthanasia; at the bottom, an example of active euthanasia. For each pair of cases down the slope there is nothing that sensibly makes a morally(More)
This study is the first report on the ultrastructure of the sperm storage glands (spermathecae) in the salamander Rhyacotriton variegatus. The population studied is associated with cold-water, rocky streams of the redwood (Sequoia) zone in northern California. Males possess sperm in their vasa deferentia and undergo spermiation throughout the year, but(More)
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