When females mate with more than one male, each one's sperm has to compete to get to her eggs. Until now, researchers had thought the fastest sperm would dominate.
Evolution
Jan 31, 2014
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Yale researchers have discovered how the "guardian of the genome'' oversees quality control in the production of sperm — and perhaps in many other cells as well.
Cell & Microbiology
Feb 16, 2012
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Contrary to predictions, males of high genetic quality are not very successful when it comes to fertilizing eggs. A new study on seed beetles by Swedish and Danish scientists Göran Arnqvist and Trine Bilde shows that when ...
Plants & Animals
Jun 25, 2009
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A tiny marsupial found only in northwest Australia mates so intensely that an entire generation of males can die off during a single breeding season, researchers reported on Friday.
Plants & Animals
Sep 6, 2019
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In research on zebrafish, Örebro researchers have identified a gene that is essential for producing sperm. Results show that fewer and poorer quality sperm are produced when the gene was turned off with the Crispr/Cas9 technique. ...
Biotechnology
Feb 28, 2019
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In a study published in Behavioral Ecology researchers from Uppsala University show that the same type of sperm is not always the best for all male birds. Depending on how attractive or dominant you are you might be more ...
Plants & Animals
Aug 16, 2018
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It's likely you've never heard of a hihi, let alone seen one in the wild. Also known as stitchbirds, these colourful little critters are a true taonga, or treasure. They're only found in New Zealand, and currently restricted ...
Ecology
Apr 12, 2018
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A study led by researchers at The University of Nottingham has discovered that the fertility of dogs may have suffered a sharp decline over the past three decades.
Plants & Animals
Aug 9, 2016
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Males with low sperm quality probably won't get much help from dining down on fish oil supplements and a bag of carrots, recent aquatic-based research suggests.
Plants & Animals
Jun 25, 2015
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An animal biologist says poor nutrition results in genetic damage to sperm cells and lower sperm motility for rams.
Plants & Animals
Aug 20, 2014
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