Sperm Whales Current Events | Sperm Whales News
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Underwater listening devices yield discoveries about endangered large whales
Why whales emit their characteristic calls remains largely a biological mystery, but listening for the distinctive underwater sounds provides a valuable way to track the movements of endangered large whales. view more (2006-01-03)
Unique study shows oil, gas seismic work not affecting Gulf sperm whales
Noise can be irritating and possibly harmful for everything from mice to humans - and maybe even 60-foot whales in the Gulf of Mexico. view more (2008-08-22)
Whales are polite conversationalists
What do a West African drummer and a sperm whale have in common? According to some reports, they can both spot rhythms in the chatter of an ocean crowded with the calls of marine mammals -- a feat impossible for the untrained human ear. view more (2009-10-27)
El Nino events affect whale breeding
A thirty-year study by an international team of scientists found a strong relationship between breeding success of whales in the South Atlantic and El Nino in the western Pacific. view more (2006-01-11)
Research tracks whales by listening to sounds
Researchers have developed a new tool to help them study endangered whales - autonomous hydrophones that can be deployed in the ocean to record the unique clicks, pulses and calls of different whale species. view more (2006-01-03)
Sporty Sperm: A Stiff One Gets the Job Done More Quickly
A scientist who studies the phsyics of sperm "as a hobby" is challenging the current understanding of how sperm swim towards an egg. At the Society for Experimental Biology conference today Dr Christopher Lowe will present the results of his modelling of a sperm`s tail, suggesting we may need to re-think our assumptions of how sperm move through... view more... (2002-04-10)
Stiff competition: size matters
Are longer sperm more successful than shorter sperm in the race for life? This is one of the questions Dr. Matthew Gage (University of East Anglia) will be addressing on Wednesday 31st March 2004 at the annual SEB meeting in Edinburgh (29th March - 2nd April 2004). Dr. Gage will present evidence that sperm speed, size and shape all matter when it... view more... (2004-03-26)
Thieving whale caught on video gives rare clues about hunting strategy, sound production
For decades scientists have been intrigued by the variety of sounds emitted by sperm whales, partly due to a popular theory that suggests that the sounds might contain information about the animals' size. view more (2009-05-22)
Sophisticated sexual behavior in roosters
In the animal world, it's common for females to mate with several males during one and the same reproductive period. This leads to sperm competition, that is, sperm from several different males compete to fertilize the egg at the same time. The most common response to increased sperm competition is for males to increase the number of sperm cells... view more... (2003-11-10)
Genomic imprinting in disruptive spermatogenesis (p 1700)
Low sperm counts could be associated with genomic imprinting disease and could carry a raised risk of transmitting imprinting defects following assisted reproductive technologies, claim researchers in this week's issue of THE LANCET. Genomic imprinting is a gene regulatory mechanism based on differential methylation, whereby only one of two... view more... (2004-05-19)
Protein translation in sperm
A new paper in the February 15th issue of Genes & Development lends novel insight into the cellular changes that occur in sperm while they reside in the female reproductive tract. view more (2006-02-15)
Researchers set standard for male fertility
Researchers in Leeds and the USA have developed a ‘gold standard’ for fertile sperm, in a major step towards understanding male infertility. In an article published in The Lancet, (pp772 06/09/2002) the researchers explain how they analysed genetic fingerprints from a range of sperm samples. Sperm cells have a complex genetic... view more... (2002-09-06)
Whale songs are heard for the first time around New York City waters
For the first time in waters surrounding New York City, the beckoning calls of endangered fin, humpback and North Atlantic right whales have been recorded, according to experts from the Bioacoustics Research Program at the Cornell Lab of Ornithology and the New York State Department of Environmental Conservation (DEC). view more (2008-09-17)
Mother's genes determine sperm design
A new study at the University of Sheffield, published today in Nature, has found that the size and shape of a zebra finch's sperm are genetically passed down from the mother, a fact that may also be true in humans. The paper Genetic effects on sperm design in the zebra finch, also suggests that when sperm operate in a non-competitive environment... view more... (2005-03-15)
Hippo ancestry disputed
Hippos spend lots of time in the water and now it turns out (or researchers argue), they are the closest living relative to whales. It also turns out, the two are swimming in a bit of controversy. view more (2009-03-19)
Quality control mechanism tags defective sperm cells inside the body
Defective sperm cells do not pass through the body unnoticed. A new University of Missouri study provides evidence that the body recognizes and tags defective sperm cells while they undergo maturation in the epididymis, a sperm storage gland attached to the testis. view more (2008-01-24)
Genetics links whale to two different ocean basins
For the first time ever, a genetic study has followed a single humpback whale from one ocean basin to another, adding to traditional notions of the migratory patterns of these majestic marine mammals in the process. view more (2005-08-18)
Sperm may play leading role in spreading HIV
Sperm, and not just the fluid it bathes in, can transmit HIV to macrophages, T cells, and dendritic cells (DCs), report a team led by Ana Ceballos at the University of Buenos Aires in Argentina. view more (2009-10-26)
Migrating squid drove evolution of sonar in whales and dolphins, researchers argue
Behind the sailor's lore of fearsome battles between sperm whale and giant squid lies a deep question of evolution: How did these leviathans develop the underwater sonar needed to chase and catch squid in the inky depths" view more (2007-09-06)
'The snip' may have irreversible effects on sperm
Scientists call for more research into the long-term effects of vasectomy, as results revealed today(1) suggest that the effects of 'the snip' might not be as "reversible" as previously thought. Work led by Dr Sheena Lewis at Queen's University Belfast on testicular biopsies shows that men who had a vasectomy more than 10 years ago have... view more... (2004-03-30)
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