Results 41 to 50 of about 325,970 (302)

Sexual selection in a transparent worm : insights from fluorescent sperm [PDF]

, 2015
Sexual selection is a potent source of selection underlying the evolution of sexual dimorphism, reproductive strategies and mating systems. Although sexual selection was initially thought to occur exclusively at the pre-copulatory stage (e.g., contests ...
Marie-Orleach, Lucas
core   +1 more source

Cryopreservation of Pike Perch Sperm in Hatchery Conditions [PDF]

, 2008
Experiments were carried out on pike perch (Sander lucioperca L.) to find a method for stripping sperm without contamination by urine, to determine sperm concentration, and to fertilize large batches of eggs with cryopreserved sperm.
Urbányi, Béla, Horváth, László, Horváth, Ákos, Bokor, Zoltán   +3 more
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Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate [PDF]

, 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   +2 more sources

Cryptic male choice: sperm allocation strategies when female quality varies [PDF]

, 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, Engqvist, Leif ; https://orcid.org/, Kurtz, Joachim, L. Engqvist, K. Reinhold, J. Kurtz   +5 more
core   +1 more source

Results of a China external quality assessment program for seminal plasma biochemistry: a 5 years experience [PDF]

Journal of Men's Health
Background: This 5-year external quality assessment (EQA) study evaluated laboratory performance in analyzing seminal plasma biomarkers (zinc, citrate, fructose, neutral α-glucosidase (NAG)), assessing inter-lab variability, methodological trends, and
Yan Zheng, Lijuan Ying, Lin Yu, Yingbi Wu, Yuan Liu, Jintao Yuan, Chengcheng Diao, Yi Ma, Qingyuan Cheng, Fuping Li   +9 more
doaj   +1 more source

Male cancer patient sperm cryopreservation for fertility preservation: 10-year monocentric experience

Basic and Clinical Andrology, 2021
Résumé Contexte Lacryoconservation des spermatozoïdes, méthode efficace pour préserver lafertilité masculine, est très avantageuse pour les hommes atteints de cancer.Malheureusement, comme les médecins et les patients atteints de cancersignorent les ...
Xiao Liu, Bo Liu, Shasha Liu, Yang Xian, Wenrui Zhao, Bin Zhou, Xiao Xiao, Li Wang, Xiaofang Zhu, Bizhen Shu, Min Jiang, Fuping Li   +11 more
doaj   +1 more source

Does air pollution exposure affect semen quality? Evidence from a systematic review and meta-analysis of 93,996 Chinese men

Frontiers in Public Health, 2023
BackgroundAir pollution may impair male fertility, but it remains controversial whether air pollution affects semen quality until now.ObjectivesWe undertake a meta-analysis to explore potential impacts of six pollutants exposure during the entire window (
Junjie Liu, Yanpeng Dai, Runqing Li, Jiayi Yuan, Quanxian Wang, Linkai Wang   +5 more
doaj   +1 more source

The sperm’s tale [PDF]

Investigative Genetics, 2014
Copenhagen is as flat as the proverbial pan-cake. A good way to appreciate this is to visit the Rundetaarn, a 35 m tower whose summit is reached by a spiral ramp designed in the 17th century to accommodate a horse and cart carrying books to its elevated library, and in more recent times inviting the competitive attention of puffing middle-aged blokes ...
openaire   +3 more sources

Rheotaxis facilitates upstream navigation of mammalian sperm cells [PDF]

, 2014
A major puzzle in biology is how mammalian sperm maintain the correct swimming direction during various phases of the sexual reproduction process. Whilst chemotaxis may dominate near the ovum, it is unclear which cues guide spermatozoa on their long ...
Dunkel, Jörn, Raymond E Goldstein, Jörn Dunkel, Goldstein, Raymond E., Martyn Blayney, Kantsler, Vasily, Dunkel, Joern, Blayney, Martyn, Vasily Kantsler   +8 more
core   +1 more source

Re-sperm collection with a short abstinence time: a strategy for successful cryopreservation in cryptozoospermia [PDF]

Journal of Men's Health
Background: Recent studies suggest that short-term abstinence may improve semen parameters; however, its impact on cryptozoospermia remains underexplored.
Wen-Rui Zhao, Bo Liu, Xue-Feng Luo, Jin-Yan Xu, Chen Luo, Yuan Liu, Yang Xian, Fu-Ping Li   +7 more
doaj   +1 more source