A magpie's guide to avoiding cuckoo parasitism
Fitness for toad sperm: The secret is to mate frequently
An increasing number of men suffer from fertility problems, especially in western society. The general belief is that many problems may be related to stress but it is possible that some of them may arise because men simply ...
Dec 04, 2012
not rated yet
0
Testosterone regulates solo song of tropical birds
(Phys.org)—In male songbirds of the temperate zone, the concentration of sex hormones is rising in spring, which leads to an increase in song activity during the breeding season. In the tropics, there has ...
Oct 31, 2012
not rated yet
0
|
Napiergrass: A potential biofuel crop for the sunny Southeast
A grass fed to cattle throughout much of the tropics may become a biofuel crop that helps the nation meet its future energy needs, according to a U.S. Department of Agriculture (USDA) scientist.
Sep 27, 2012
3 / 5 (2)
0
Gannet foraging sharpens thinking about marine conservation
Scientists observe reproductive seasonality in male giant pandas
A three-year study of giant pandas published today in Biology of Reproduction's Papers-in-Press reveals that reproductive seasonality exists not only in female pandas, but in male pandas as well.
Apr 04, 2012
not rated yet
1
|
Scientists predict where seabirds forage
Hunger may inhibit defensive behavior
Most animals don't spend nearly as much time and energy defending nesting or mating sites against intruders outside the breeding season. That's a given.
Feb 01, 2012
4 / 5 (1)
0
|
Birds must choose between mating, migrating, study finds
Sex or nice weather. That's the agonizing choice some birds face, according to a new University of Guelph study.
Apr 06, 2011
5 / 5 (1)
0
|
Status symbols of house sparrows: High testosterone darkens their bill
(PhysOrg.com) -- The size of the black breast bib - the badge - and bill colour of male House Sparrows change over the course of the year. Such ornaments usually signal quality and dominance of a male to his ...
Jun 04, 2010
5 / 5 (3)
0
|
Natural antioxidants give top barn swallows a leg on competitors
A new University of Colorado at Boulder study indicates North American barn swallows outperform their peers in reproduction -- the "currency" of evolutionary change -- by maintaining a positive balance of ...
Feb 24, 2010
5 / 5 (1)
0
|
