Zobrazeno 1 - 10
of 170
pro vyhledávání: '"Eduardo R S Roldan"'
Autor:
Anthony Valverde, Olivier Castro-Morales, Mónica Madrigal-Valverde, Marlen Camacho, Vinicio Barquero, Carles Soler, Eduardo R S Roldan
Publikováno v:
PLoS ONE, Vol 16, Iss 3, p e0248270 (2021)
There has been very limited use of computer assisted semen analysis (CASA) to evaluate reptile sperm. The aim of this study was to examine sperm kinematic variables in American crocodile (Crocodylus acutus) semen samples and to assess whether sperm s
Externí odkaz:
https://doaj.org/article/2dbe51e776854bf8aab8b730e53bda6f
Publikováno v:
PLoS ONE, Vol 10, Iss 9, p e0138185 (2015)
Mass-specific metabolic rate, the rate at which organisms consume energy per gram of body weight, is negatively associated with body size in metazoans. As a consequence, small species have higher cellular metabolic rates and are able to process resou
Externí odkaz:
https://doaj.org/article/b312ed4380c846bb9284bb0dbab6091d
Publikováno v:
PLoS ONE, Vol 9, Iss 3, p e91302 (2014)
Proteomic studies of spermatozoa have identified a large catalog of integral sperm proteins. Rapid evolution of these proteins may underlie adaptive changes of sperm traits involved in different events leading to fertilization, although the selective
Externí odkaz:
https://doaj.org/article/bcdd70d8eea54f6c813f1add9a4364e4
Publikováno v:
PLoS ONE, Vol 9, Iss 9, p e108148 (2014)
Interspecific comparative studies have shown that, in most taxa, postcopulatory sexual selection (PCSS) in the form of sperm competition drives the evolution of longer and faster swimming sperm. Work on passserine birds has revealed that PCSS also re
Externí odkaz:
https://doaj.org/article/cf6e4509bbea403cb1b4b31952e46421
Publikováno v:
PLoS ONE, Vol 8, Iss 9, p e76510 (2013)
Sperm competition leads to increased sperm production in many taxa. This response may result from increases in testes size, changes in testicular architecture or changes in the kinetics of spermatogenesis, but the impact of each one of these processe
Externí odkaz:
https://doaj.org/article/841740453fa34ff9b8978fd8b17c4069
Publikováno v:
PLoS ONE, Vol 8, Iss 11, p e80607 (2013)
Mammalian spermatozoa, particularly those of rodent species, are extremely complex cells and differ greatly in form and dimensions. Thus, characterization of sperm size and, particularly, sperm shape represents a major challenge. No consensus exists
Externí odkaz:
https://doaj.org/article/2fd2a0cbc62f45ba8deb27644da97a95
Autor:
Juan M. Solís, Francisco Sevilla, Miguel A. Silvestre, Ignacio Araya-Zúñiga, Eduardo R. S. Roldan, Alejandro Saborío-Montero, Anthony Valverde
Publikováno v:
Animals, Vol 14, Iss 19, p 2768 (2024)
This investigation aimed to analyze the effect that thawing time and temperature in combination with a termo-resistance test had on straws from dairy bulls used for artificial insemination (AI) on semen motility and kinematic variables measured with
Externí odkaz:
https://doaj.org/article/ce67a3b6a6c1410cb889139b0f3ffd86
Autor:
Lena Lüke, Alberto Vicens, Francois Serra, Juan Jose Luque-Larena, Hernán Dopazo, Eduardo R S Roldan, Montserrat Gomendio
Publikováno v:
PLoS ONE, Vol 6, Iss 12, p e29247 (2011)
Sexual selection has been proposed as the driving force promoting the rapid evolutionary changes observed in some reproductive genes including protamines. We test this hypothesis in a group of rodents which show marked differences in the intensity of
Externí odkaz:
https://doaj.org/article/8fb5d444be194ac8854fe6175c47871f
Autor:
Laura Gómez Montoto, Concepción Magaña, Maximiliano Tourmente, Juan Martín-Coello, Cristina Crespo, Juan José Luque-Larena, Montserrat Gomendio, Eduardo R S Roldan
Publikováno v:
PLoS ONE, Vol 6, Iss 3, p e18173 (2011)
Sperm competition favors increases in relative testes mass and production efficiency, and changes in sperm phenotype that result in faster swimming speeds. However, little is known about its effects on traits that contribute to determine the quality
Externí odkaz:
https://doaj.org/article/f70ee4e0e5184615941456ed29a82f3a
Publikováno v:
PLoS ONE, Vol 6, Iss 6, p e21244 (2011)
Two complementary hypotheses have been proposed to explain variation in sperm size. The first proposes that post-copulatory sexual selection favors an increase in sperm size because it enhances sperm swimming speed, which is an important determinant
Externí odkaz:
https://doaj.org/article/fb10e0c0654e490b86496472ed9e9fdf