Results 71 to 80 of about 1,124,248 (284)
Selection on male and female reproductive traits in a simultaneous hermaphrodite land snail [PDF]
, 2013 Classical sexual selection theory assumes that the reproductive success of females is limited by the resources available for egg production, while the reproductive success of males is determined by the number of mates (Bateman’s principle).
Minoretti, Nicole
core +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
BMC Biology, 2018 Background The phenotypes of sperm are generally believed to be under the control of the diploid genotype of the male producing them rather than their own haploid genotypes, because developing spermatids share cytoplasm through intercellular bridges ...
Richard Borowsky +3 more
doaj +1 more source
Differential sperm expenditure reveals a possible role for post-copulatory sexual selection in a lekking moth [PDF]
, 2013 Cordes N, Yiğit A, Engqvist L, Schmoll T. Differential sperm expenditure reveals a possible role for post-copulatory sexual selection in a lekking moth. Ecology and Evolution.
Yiğit, Arzu +7 more
core +1 more source
Partners or passengers? Revisiting the association between diatoms and aquatic animals
Biological Reviews, EarlyView.ABSTRACT Numerous studies have revealed the importance of research on the communities capable of colonizing animal surfaces (epibionts) and the animals on which they live (basibionts). Very few studies have considered epizoic diatoms, and there are gaps and biases in our knowledge, including the choice of basibionts, the methods used, and the habitats ...
Gianluca Vacca +2 more
wiley +1 more source
Hydrodynamic propulsion of human sperm [PDF]
, 2009 The detailed fluid mechanics of sperm propulsion are fundamental to our understanding of reproduction. In this paper, we aim to model a human sperm swimming in a microscope slide chamber.
Green, Richard B. +7 more
core +1 more source
Evidence for adaptive explanations of semelparity in animals
Biological Reviews, EarlyView.ABSTRACT Semelparity, the reproductive strategy of reproducing once, is widespread but uncommon in animals. Classes of models to explain the evolution of semelparity are based either on age structure and mortality schedules – demographic models in which high post‐reproductive mortality risk favours high reproductive effort and semelparity results from ...
Diana O. Fisher +1 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
Developmental Dynamics, EarlyView.Abstract The sea anemone, Nematostella vectensis, has been used as a model organism in developmental biology studies for many years. This estuarine species has the notable capacity to regenerate its full body plan from small pieces throughout life. Nematostella have been described as having a great degree of cellular plasticity.
Patrick A. Lewis +3 more
wiley +1 more source
Sperm Competition Risk and Sexual Coercion Predict Copulatory Duration in Humans
Evolutionary Psychology, 2015 A man whose romantic partner is sexually unfaithful is at risk of sperm competition and cuckoldry—unwitting investment in offspring to whom he is genetically unrelated.
Nicole Barbaro +2 more
doaj +1 more source