Results 71 to 80 of about 19,844 (294)

Unique sperm haplotypes are associated with phenotypically different sperm subpopulations in Astyanax fish

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, Alissa Luk, Xinjian He, Rebecca S. Kim   +3 more
doaj   +1 more source

Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate

, 2012
There is growing interest in sperm senescence, both in its underlying mechanisms and evolutionary consequences, because it can impact the evolution of numerous life history traits. Previous studies have documented various types of sperm senescence, but
Richard H. Wagner, Penn, Dustin J., Richard H Wagner, Hoi Herbert, Wagner, Richard H., Hettyey Attila, Hoi, Herbert, Attila Hettyey, Dustin J. Penn, Balázs Vági, Herbert Hoi, Vági Balázs, Wagner Richard H., Penn Dustin J., Hettyey, Attila, Vági, Balázs, Dustin J Penn   +16 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, Elisa Falasco, Francesca Bona   +2 more
wiley   +1 more source

Sperm transfer and paternity in the scorpionfly Panorpa cognata: large variance in traits favoured by postcopulatory episodes of sexual selection

, 2007
Engqvist L, Dekomien G, Lippmann T, Epplen JT, Sauer KP. Sperm transfer and paternity in the scorpionfly Panorpa cognata: large variance in traits favoured by postcopulatory episodes of sexual selection. Evolutionary Ecology.
Sauer, Klaus Peter, Epplen, Jörg T., Lippmann, Tania, Dekomien, Gabriele, Engqvist, Leif ; https://orcid.org/   +4 more
core   +1 more source

The Heritability of Mating Behaviour in a Fly and Its Plasticity in Response to the Threat of Sperm Competition [PDF]

, 2014
Phenotypic plasticity is a key mechanism by which animals can cope with rapidly changeable environments, but the evolutionary lability of such plasticity remains unclear.
Price, TA, Bretman, Amanda J., Tom A R Price, Price, Tom A. R., Walling, CA, Anne Lizé, Lizé Anne, Bretman, A, Lizé, A, Bretman Amanda, Amanda Bretman, Bretman, Amanda, Craig A Walling, Price Tom A. R., Lize, Anne, Walling, Craig A., Walling Craig A.   +16 more
core   +1 more source

The Influence of Drosophila Spire and Myosin V During Mid‐Oogenesis Is Independent of Their Direct Interaction

Cytoskeleton, EarlyView.
ABSTRACT Cooperativity between cytoskeletal proteins is crucial for spatiotemporal coordination in biological processes, like oogenesis. In mammalian and Drosophila oogenesis, proper assembly and function of actin networks require coordination between actin assembly factors Spire and formins, as well as actin‐associated proteins like myosins and Rab ...
Joseph Y. Ong, Hannah M. Bailey, Emma Carley, Michelle Panzica, Merin Rixen, Neil Billington, Rong Liu, Margot E. Quinlan   +7 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, Michael N. Pham, Todd K. Shackelford   +2 more
doaj   +1 more source

Sperm Morphology in Neotropical Primates

Animals, 2019
The morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. We evaluated and compared the sperm morphometry of five neotropical primate species: Alouatta caraya ...
Eliana R. Steinberg, Adrián J. Sestelo, María B. Ceballos, Virginia Wagner, Ana M. Palermo, Marta D. Mudry   +5 more
doaj   +1 more source

Casanovas are liars : behavioral syndromes, sperm competition risk, and the evolution of deceptive male mating behavior in live-bearing fishes [version 2; referees: 2 approved, 1 approved with reservations]

, 2013
Male reproductive biology can by characterized through competition over mates as well as mate choice. Multiple mating and male mate choice copying, especially in internally fertilizing species, set the stage for increased sperm competition, i.e., sperm ...
Geupel, Holger, David Bierbach, Ingo Schlupp, Holger Geupel, Schlupp, Ingo, Plath, Martin, Amber M Makowicz, Bierbach, David, Streit, Bruno, Bruno Streit, Makowicz, Amber M., Martin Plath   +11 more
core   +1 more source

Preserved Spermatogenesis and Hormonal Function in Men Receiving a Pretomanid Regimen (BPaMZ) for Pulmonary Drug‐Resistant Tuberculosis

Clinical Pharmacology &Therapeutics, EarlyView.
Pretomanid is a component of the World Health Organization‐recommended treatment regimen for drug‐resistant tuberculosis in patients aged ≥ 14 years. While preclinical rodent studies identified testicular toxicity as a potential clinical liability at elevated doses, no corresponding effects were observed in nonhuman primates nor clinical hormone ...
Pauline Howell, Antonio Lombardi, William Brumskine, Lali Mikiashvili, Kim Boekelheide, Joanna Moreira, Alda Holsta, Matthew Betteridge, Lindsay Thompson, Angela Crook, Paul Bruinenberg, Maria Beumont, Eugene Sun, Francesca Conradie   +13 more
wiley   +1 more source