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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)

How is that whale listening?
Researchers from San Diego State University and the University of California have been using computer models to mimic the effects of underwater noise on an unusual whale species and have discovered a new pathway for sound entering the head and ears.   view more (2008-02-04)

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... 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... view more (2004-03-26)

Scientists solve mystery of the 'unicorn' whale
Once the subject of mythical accounts of magical power, the helix-shaped tusk of the narwhal, or "unicorn" whale has proved to be an extraordinary sensory organ.   view more (2005-12-23)

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)

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... 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... view more (2004-05-19)

Whale shark protected in new marine conservation project
Dr Callum Roberts of the Environment Department at the University of York has been awarded £130,000 by the UK Darwin Initiative fund to work with the Belize Department of Fisheries, conservation organisations and local communities on conservation strategies for migratory species such as the... view more (2000-03-09)

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... view more (2002-09-06)

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... view more (2005-03-15)

Photo-monitoring whale sharks
Up to 20 meters long and weighing as much as 20 tons, its enormous size gives the whale shark (Rhincodon typus) its name. Known as the 'gentle giant' for its non-predatory behavior, this fish, with its broad, flattened head and minute teeth, eats tiny zooplankton, sieving them through a fine mesh... view more (2007-12-26)

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)

'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... view more (2004-03-30)

Viagra may affect fertility
Researchers from Belfast reveal today that men who take Viagra when they are hoping to start a family could be affecting their fertility. A group lead by Dr Sheena Lewis at the Department of Obstetrics and Gynaecology at Queen's University Belfast have shown that while Viagra enhances sperm... view more (2004-03-31)

New study finds most North Pacific humpback whale populations rebounding
The number of humpback whales in the North Pacific Ocean has increased since international and federal protections were enacted in the 1960s and 70s, according to a new study funded primarily by NOAA and conducted by more than 400 whale researchers throughout the Pacific region.   view more (2008-05-22)

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)

Low sperm count linked to organic solvents
Men repeatedly exposed to organic solvents are over twice as likely to have a low sperm count, reports a study in Occupational and Environmental Medicine. The higher the level of exposure the greater was the risk, with professional printers and painters and decorators most at risk, the study shows.... view more (2001-09-07)

Ancient whale fall from California's Año Nuevo Island one of youngest, most complete known
A fossilized whale skeleton excavated 20 years ago amid the stench and noise of a seabird and elephant seal rookery on California's Año Nuevo Island turns out to be the youngest example on the Pacific coast of a fossil whale fall and the first in California, according to University of... view more (2007-09-14)

Sperm created in the laboratory from embryonic stem cells produce viable progeny
Scientists have demonstrated for the first time that embryonic stem (ES) cells cultured in the laboratory can produce sperm with the capacity to produce viable offspring.   view more (2006-07-12)

Saving Sperm For A Later Date
The Monty Python song was right: every sperm is sacred - if you're living in the promiscuous world of chickens that is. Scientists studying the evolution of reproductive behaviour have shown that cockerels use sophisticated strategies to maximise reproductive return from limited sperm reserves.... view more (2003-11-03)

The precise role of seminal proteins in sustaining post-mating responses in fruit flies
Successful reproduction is critical to pass genes to the next generation. In sexually reproducing organisms, sperm enter the female with seminal proteins that are vital for fertility.   view more (2007-12-18)

Low sperm count may be associated with prenatal testosterone excess
Exposure to an excess of sexual steroids, like testosterone, during fetal development may be a potential risk factor for low sperm count and motility.   view more (2008-09-23)
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