Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate
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Tartalom: http://real.mtak.hu/3782/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published


Type = Article
Cím:
Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate
Létrehozó:
Hettyey, Attila
Vági, Balázs
Penn, Dustin J.
Hoi, Herbert
Wagner, Richard H.
Dátum:
2012-12
Téma:
QH540 Ecology / ökológia
QL Zoology / állattan
QP Physiology / élettan
Tartalmi leírás:
There is growing interest in sperm senescence, both in its underlying mechanisms and evolutionary consequences, because
it can impact the evolution of numerous life history traits. Previous studies have documented various types of sperm
senescence, but evidence of post-meiotic intra-testicular sperm senescence in wild animals is lacking. To assess such
senescence, we studied within-season changes in sperm motility in the common toad (Bufo bufo), where males produce all
sperm prior to the breeding season. We found that males exposed to experimentally induced re-hibernation at the start of
the breeding season, that is to experimentally lowered metabolic rates, stored sperm of significantly higher motility than
males that were kept under seminatural conditions without females throughout the breeding season. This finding indicates
that re-hibernation slows normal rates of sperm ageing and constitutes the first evidence to our knowledge of post-meiotic
intra-testicular sperm senescence in a wild vertebrate. We also found that in males kept in seminatural conditions, sperm
motility was positively related to the number of matings a male achieved. Thus, our results suggest that post-meiotic intratesticular
sperm senescence does not have a genetically fixed rate and may be modulated by temperature and possibly by
mating opportunities.
Típus:
Article
PeerReviewed
Formátum:
application/pdf
Azonosító:
Hettyey, Attila and Vági, Balázs and Penn, Dustin J. and Hoi, Herbert and Wagner, Richard H. (2012) Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate. Public Library of Science ONE, 7 (12). e50820.
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