News tagged with reproductive fitness
Studies examine how living conditions impact reproductive health
Sep 28, 2009 |
not rated yet |
0
When costs outweigh benefits, successful pregnancies are less likely to occur.
Key to evolutionary fitness: Cut the calories
Jul 01, 2009 |
5 / 5 (2) |
0
Charles Darwin and his contemporaries postulated that food consumption in birds and mammals was limited by resource levels, that is, animals would eat as much as they could while food was plentiful and produce as many offspring ...
Search results for reproductive fitness
Inbreeding insects cast light on longer female lifespans
Biology /
Feb 06, 2009 |
not rated yet |
0
Inbreeding can unexpectedly extend male lifespan. Insect experiments described in the open access journal BMC Evolutionary Biology have shown that, in seed beetles, inbreeding causes males to live longer, while shortening ...
It's in his smell
Mar 03, 2009 |
5 / 5 (1) |
0
A female moth selects a mate based on the scent of his pheromones. An analysis of the pheromones used by the European Corn Borer (ECB, Ostrinia nubilalis), featured in the open access journal BMC Biology, ...
Exposing chicks to maternal stress leads to long-term reproductive success
Biology /
Oct 21, 2008 |
4 / 5 (2) |
0
Do mothers purposely expose their offspring to their own stress? If so, why?
Study discovers secret of Scottish sheep evolution
Biology /
Jan 17, 2008 |
4 / 5 (15) |
0
Researchers from the University of Sheffield, as part of an international team, have discovered the secret of why dark sheep on a remote Scottish Island are mysteriously declining, seemingly contradicting Darwin’s evolutionary ...
Males caring for offspring is a good reproductive strategy
Biology /
Mar 28, 2007 |
not rated yet |
0
Caring fathers in the animal world aren’t necessarily at a disadvantage compared with those who abandon their offspring.
Hatchery fish may hurt efforts to sustain wild salmon runs
Jun 10, 2009 |
5 / 5 (1) |
1
Steelhead trout that are originally bred in hatcheries are so genetically impaired that, even if they survive and reproduce in the wild, their offspring will also be significantly less successful at reproducing, according ...
Delayed breeding is not necessarily costly to lifetime reproductive success
Biology /
Apr 05, 2007 |
not rated yet |
0
Using 24 years of data from the longest-running study of a cooperative bird species on the African continent, researchers at the Universities of Bristol and Cape Town have cast doubt on one of the biggest assumptions in behavioral ...
Fitness levels decline with age, especially after 45
Oct 26, 2009 |
4 / 5 (2) |
0
Men and women become gradually less fit with age, with declines accelerating after age 45, according to a report in the October 26 issue of Archives of Internal Medicine, one of the JAMA/Archives journals. However, mainta ...
Fish evolve a longer lifespan by evolving a longer period during which they reproduce
Jan 02, 2006 |
2.6 / 5 (5) |
0
A UC Riverside-led research team has found that as some populations of an organism evolve a longer lifespan, they do so by increasing only that segment of the lifespan that contributes to “fitness” – the relative ...
In birds, expecting to mate leads to higher fertilization rates
Biology /
Oct 04, 2007 |
5 / 5 (2) |
0
From an evolutionary perspective, the primary task of an organism is to pass along its genes to future generations. Such genetic transmission is usually assumed to be instinctive. However, a new study shows that species also ...
List of search results for reproductive fitness
