Age of maturation and behavioral tactics in male yellow ground squirrel Spermophilus fulvus during mating season
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چکیده
منابع مشابه
Flexible mating tactics and associated reproductive effort during the rutting season in male reindeer (Rangifer tarandus,
Polygynous males can change their mating tactics across their lifetime, but information is scarce on the flexibility of this trait within a given season and the relative costs and benefits of using different tactics. Here, we monitored individually marked male reindeer Rangifer tarandus and classified their mating tactics as harem-defense, sneaking, or mixed. The costs of the male reproductive ...
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MOY, hZHARD h/I. Renal junction in the hibernating ground squirrel Spermophilus columbianus. Am. J. Physiol. 220(3) : 747-753. 1971. -A tissue-slice analysis showed no solute gradient of urea and sodium from the corticomedullary boundary through the papilla of torpid Columbian ground squirrels. Ground squirrels arousing normally from torpor and sacrificed 15 or 40 min after urine began to flow ...
متن کاملGeneric Revision in the Holarctic Ground Squirrel Genus Spermophilus
The substantial body of research on Holarctic ground squirrels amassed over the past century documents considerable variability in morphological, cytogenetic, ecological, and behavioral attributes in the genus Spermophilus F. Cuvier, 1825. Recent molecular phylogenetic studies suggest that the traditionally recognized genera Marmota Blumenbach, 1779 (marmots), Cynomys Rafinesque, 1817 (prairie ...
متن کاملAlternative mating tactics in the yellow dung fly: resolving mechanisms of small-male advantage off pasture.
Recent work suggests that the yellow dung fly mating system may include alternative patroller-competitor mating tactics in which large males compete for gravid females on dung, whereas small, non-competitive males search for females at foraging sites. Small males obtain most matings off pasture, yet the behavioural mechanism(s) giving rise to this pattern are unknown. We investigated the male a...
متن کاملA shortage of males causes female reproductive failure in yellow ground squirrels
Sexual conflict theory suggests that female breeding success is strongly influenced by individual life history and environmental conditions and is much less affected by mate availability. Female mating failure due to a shortage of males remains poorly studied and understood. We present data on the effects of male availability on female breeding success in a wild colony of yellow ground squirrel...
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ژورنال
عنوان ژورنال: Current Zoology
سال: 2014
ISSN: 2396-9814,1674-5507
DOI: 10.1093/czoolo/60.6.700