Results 61 to 70 of about 19,844 (294)
, 2013 Engqvist L. A general description of additive and non-additive elements of sperm competitiveness and their relation to male fertilization success. Evolution.
Engqvist, Leif +1 more
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Sexual selection and sex allocation in a simultaneous hermaphrodite [PDF]
, 2010 Since Darwin’s pioneering work, sexual selection theory has become a unifying framework in evolutionary biology successfully explaining the variation in sexual dimorphism, reproductive strategies and mating systems. Although, it has long been argued that
Janicke, Tim
core +1 more source
Tracing the evolutionary history of the morpho‐anatomy of baculum in primates
The Anatomical Record, EarlyView.Abstract Animal morphology reflects both evolutionary history and present‐day adaptation. Male mammal copulatory structures such as the baculum (penile bone) are ideal for studying these processes because of their complexity and high interspecific variability. In primates, however, research has focused mostly on baculum length.
Federica Spani +3 more
wiley +1 more source
Rogue sperm indicate sexually antagonistic coevolution in nematodes. [PDF]
PLoS Biology, 2014 Intense reproductive competition often continues long after animals finish mating. In many species, sperm from one male compete with those from others to find and fertilize oocytes.
Ronald E Ellis, Lukas Schärer
doaj +1 more source
Follicle Stimulating Hormone in Cattle Breeding: Fundamentals, Innovations, and Scope
Animal Research and One Health, EarlyView.FSH is crucial in cattle reproduction, with exogenous administration enhancing breeding and embryo production. Recombinant FSH offers advantages over pituitary‐extracted variants, including fewer injections, reduced stress, and safer production. These innovations improve breeding efficiency, optimize reproductive outcomes, and contribute to sustainable
Muhammad Shahzad +7 more
wiley +1 more source
Cryptic male choice: sperm allocation strategies when female quality varies
, 2002 Reinhold K, Kurtz J, Engqvist L. Cryptic male choice: sperm allocation strategies when female quality varies. Journal of Evolutionary Biology. 2002;15(2):201-209.We examined evolutionary stable sperm allocation and included stochastic variation in male ...
Reinhold, Klaus +2 more
core +1 more source
Arthritis &Rheumatology, Accepted Article.Objective Rheumatoid arthritis (RA) is characterized by anti‐modified protein antibodies (AMPAs), including anti‐citrullinated (ACPA), anti‐carbamylated (anti‐CarP), and anti‐acetylated (AAPA) protein antibodies. In contrast to other AMPAs, AAPA IgM is found in healthy individuals, raising questions about its role in early immune responses.
Aegli Athanasiadou +10 more
wiley +1 more source
Sperm competition and the evolution of spermatogenesis [PDF]
Molecular Human Reproduction, 2014 Spermatogenesis is a long and complex process that, despite the shared overall goal of producing the male gamete, displays striking amounts of interspecific diversity. In this review, we argue that sperm competition has been an important selection pressure acting on multiple aspects of spermatogenesis, causing variation in the number and morphology of ...
Ramm, Steven A. +3 more
openaire +5 more sources
, 2003 Engqvist L, Sauer KP. Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration. Journal of Evolutionary Biology.
Sauer, Klaus Peter +1 more
core +1 more source
The costs of extra‐pair behaviours in birds
Biological Reviews, EarlyView.ABSTRACT Extra‐pair behaviours – reproductive behaviours, including those related to copulation and paternity of offspring, amongst animals outside of a social pair bond – have long intrigued behavioural ecologists, particularly from the female animal's perspective.
Jørgen S. Søraker, Jamie Dunning
wiley +1 more source