Vol 9: Physiologically Persistent Corpora lutea in Eurasian Lynx Lynx lynx - Longitudinal Ultrasound and Endocrine Examinations Intra-Vitam.Report as inadecuate



 Vol 9: Physiologically Persistent Corpora lutea in Eurasian Lynx Lynx lynx - Longitudinal Ultrasound and Endocrine Examinations Intra-Vitam.


Vol 9: Physiologically Persistent Corpora lutea in Eurasian Lynx Lynx lynx - Longitudinal Ultrasound and Endocrine Examinations Intra-Vitam. - Download this document for free, or read online. Document in PDF available to download.

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This article is from PLoS ONE, volume 9.AbstractFelids generally follow a poly-estrous reproductive strategy. Eurasian lynx Lynx lynx display a different pattern of reproductive cyclicity where physiologically persistent corpora lutea CLs induce a mono-estrous condition which results in highly seasonal reproduction. The present study was based around a sono-morphological and endocrine study of captive Eurasian lynx, and a control-study on free-ranging lynx. We verified that CLs persist after pregnancy and pseudo-pregnancy for at least a two-year period. We could show that lynx are able to enter estrus in the following year, while CLs from the previous years persisted in structure and only temporarily reduced their function for the period of estrus onset or birth, which is unique among felids. The almost constant luteal progesterone secretion average of 5 ng-ml serum seems to prevent folliculogenesis outside the breeding season and has converted a poly-estrous general felid cycle into a mono-estrous cycle specific for lynx. The hormonal regulation mechanism which causes lynx to have the longest CL lifespan amongst mammals remains unclear. The described non-felid like ovarian physiology appears to be a remarkably non-plastic system. The lynxs reproductive ability to adapt to environmental and anthropogenic changes needs further investigation.



Author: Painer, Johanna; Jewgenow, Katarina; Dehnhard, Martin; Arnemo, Jon M.; Linnell, John D. C.; Odden, John; Hildebrandt, Thomas B.; Goeritz, Frank

Source: https://archive.org/







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