| Effect of increased dietary salinity on the reproductive status and energy intake of xeric and mesic populations of the spiny mouse, Acomys. | |
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MedLine Citation:
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PMID: 18824007 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The possible role of increased dietary salinity as a proximate regulator of reproduction in xeric population of golden spiny mice (Acomys russatus) and mesic population of common spiny mice (A. cahirinus) was tested. In the wild, as the dry season progresses, evaporative water loss in the vegetation increases. This leads to increase in particle concentration of plant tissues. Thus, species consuming a plant diet are exposed to increased dietary salinity. Both male and female individuals of A. russatus were subjected to gradually increasing dietary salinity (0.9%, 2.5%, 3.5%, and 5%) while those of A. cahirinus only up to 3.5% for a total period of 8 and 6 weeks, respectively. Urine osmolarity showed a significant increase under 3.5% and 5% salinity in A. russatus and 2.5% and 3.5% in A. cahirinus. Testis mass and spermatogenesis were significantly reduced while uterine mass and vaginal estrus cycles were not affected in A. russatus. None of the parameters was significantly affected in A. cahirinus. Increase in salinity also significantly reduced body mass in A. russatus but not in A. cahirinus. Mass-specific daily digestible energy intake was not significantly affected by increased salinity in both species. Recovery individuals regained body mass quickly and surpassed initial values after four weeks. However, testis mass and spermatogenesis did not show recovery. The results suggest that increase in dietary salinity could be used as a proximate signal to regulate reproduction in A. russatus by halting it in males, as the dry season progresses while such role in the mesic population of A. cahirinus is unlikely. |
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Authors:
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Tilaye Wube; Abraham Haim; Fuad Fares |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2008-09-13 |
Journal Detail:
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Title: Physiology & behavior Volume: 96 ISSN: 0031-9384 ISO Abbreviation: Physiol. Behav. Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2008-12-23 Completed Date: 2009-04-15 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0151504 Medline TA: Physiol Behav Country: United States |
Other Details:
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Languages: eng Pagination: 122-7 Citation Subset: IM |
Affiliation:
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Department of Evolutionary and Environmental Biology, University of Haifa, Mount Carmel, Israel. twube@sci.haifa.ac.il |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological
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physiology Analysis of Variance Animals Body Mass Index Body Temperature Regulation Desert Climate Energy Intake / physiology* Estrus / physiology Feeding Behavior / physiology* Female Male Murinae / physiology* Osmolar Concentration Reproduction / physiology* Salinity* Spermatogenesis / physiology Testis Urine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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