PMID: 18402763Apr 12, 2008Paper

Relationships of basal metabolic rate, relative testis size and cycle length of spermatogenesis in shrews (Mammalia, Soricidae)

Reproduction, Fertility, and Development
Roumen ParapanovPeter Vogel

Abstract

The aim of the present study was to determinate the cycle length of spermatogenesis in three species of shrew, Suncus murinus, Sorex coronatus and Sorex minutus, and to assess the relative influence of variation in basal metabolic rate (BMR) and mating system (level of sperm competition) on the observed rate of spermatogenesis, including data of shrew species studied before (Sorex araneus, Crocidura russula and Neomys fodiens). The dynamics of sperm production were determined by tracing 5-bromodeoxyuridine in the DNA of germ cells. As a continuous scaling of mating systems is not evident, the level of sperm competition was evaluated by the significantly correlated relative testis size (RTS). The cycle durations estimated by linear regression were 14.3 days (RTS 0.3%) in Suncus murinus, 9.0 days (RTS 0.5%) in Sorex coronatus and 8.5 days (RTS 2.8%) in Sorex minutus. In regression and multiple regression analyses including all six studied species of shrew, cycle length was significantly correlated with BMR (r2=0.73) and RTS (r2=0.77). Sperm competition as an ultimate factor obviously leads to a reduction in the time of spermatogenesis in order to increase sperm production. BMR may act in the same way, independently or as a proxim...Continue Reading

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Citations

Oct 16, 2009·Biology Letters·Steven A Ramm, Paula Stockley
Mar 28, 2009·Proceedings. Biological Sciences·Damian K Dowling, Leigh W Simmons
Mar 11, 2011·Proceedings. Biological Sciences·Montserrat GomendioEduardo R S Roldan
Feb 2, 2011·PloS One·Melissah Rowe, Stephen Pruett-Jones
Sep 27, 2013·PloS One·Javier delBarco-TrilloEduardo R S Roldan
Feb 8, 2011·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Andrea Bonisoli-AlquatiTimothy A Mousseau
Oct 8, 2013·Evolution; International Journal of Organic Evolution·Stefan Lüpold
Feb 6, 2014·Biological Reviews of the Cambridge Philosophical Society·Steven A Ramm, Lukas Schärer
May 2, 2015·Evolution; International Journal of Organic Evolution·James P DinesMatthew D Dean
Sep 16, 2015·PloS One·Maximiliano Tourmente, Eduardo R S Roldan
Dec 31, 2020·Systems Biology in Reproductive Medicine·Jiaying LiangXiqian Zhang

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