Results 1 to 10 of about 161,435 (115)
Female chronotype is not related to annual and lifetime reproductive success in a free-living songbird [PDF]
Circadian clocks play a crucial role in regulating the sleep–wake rhythm of organisms, aligning their activity with fluctuating environmental factors, such as light intensity. Still, significant and consistent interindividual differences in the timing of
Marjolein Meijdam +2 more
doaj +2 more sources
Post-copulatory competition in a social monogamy system: Sperm morphology correlates with components of reproductive success. [PDF]
Males in socially monogamous species can achieve reproductive success through multiple tactics- by defending paternity within the social nest and siring extra-pair offspring, or both.
Carly E Hawkins +3 more
doaj +2 more sources
Does Reproductive Success in Orchids Affect the Evolution of Their Number of Flowers? [PDF]
Species are disappearing worldwide, and changes in climate and land use are commonly assumed to be the most important causes. Organisms are counteracting the negative effects of environmental factors on their survival by evolving various defence ...
Iva Traxmandlová +2 more
doaj +2 more sources
Fitness is an individual's ability to survive and reproduce, and is an important concept in evolutionary biology. However, accurately measuring fitness is often difficult, and appropriate fitness surrogates need to be identified.
Trinh T X Nguyen, Amanda J Moehring
doaj +2 more sources
Staying Alive: Individual Behavioral Variation Influences Survival, but Not Reproductive Success, in Female Group‐Living Ground Squirrels [PDF]
Animals living in harsh or unpredictable environments adopt adaptive strategies to improve their fitness, with behavioral variation playing a key role in shaping individual outcomes.
Miyako H. Warrington +4 more
doaj +2 more sources
Understanding the reproductive strategy of an organism is important in conservation ecology as it directly affects the population performance under changing environmental conditions.
Dan Yu +9 more
doaj +1 more source
Age-dependent reduction in reproductive success can arise due to multiple factors including a deterioration of reproductive physiology. Senescing males have been shown to produce ejaculates with poor sperm quality, which impinges on male reproductive ...
Léna Meunier +8 more
doaj +1 more source
Quantifying effects of individual attributes and population demographic characteristics that affect inter‐ and intrasexual interactions and adult reproductive success, and the spatial and temporal contexts in which they are expressed is important to ...
Thuy‐Yen Duong +6 more
doaj +1 more source
Broodstock History Strongly Influences Natural Spawning Success in Hatchery Steelhead (Oncorhynchus mykiss). [PDF]
We used genetic parentage analysis of 6200 potential parents and 5497 juvenile offspring to evaluate the relative reproductive success of hatchery and natural steelhead (Onchorhynchus mykiss) when spawning in the wild between 2008 and 2011 in the ...
Michael J Ford +4 more
doaj +1 more source
Determinants and long‐term costs of early reproduction in males of a long‐lived polygynous mammal
In long‐lived polygynous species, male reproductive success is often monopolized by a few mature dominant individuals. Young males are generally too small to be dominant and may employ alternative tactics; however, little is known about the determinants ...
Yanny Ritchot +3 more
doaj +1 more source

