Zebrafish embryo cryopreservation achieved by using gold…

FIS – Researchers at the University of Minnesota and the Smithsonian Conservation Biology Institute (SCBI) have been able to provide the first-ever reproducible evidence for the successful cryopreservation of zebrafish embryos. The scientists used new gold nanotechnology and lasers to warm the embryo—the stumbling block in previous studies performed for over 60 years. The results have Read More…

Baby salmon with ‘old’ DNA more likely to survive epic migration

New Scientist – There’s something fishy going on. Juvenile Atlantic salmon with shorter telomeres – normally considered a sign of poor health – have a higher chance of surviving the epic migration from their home river to the sea and back again. Telomeres act as caps on the ends of chromosomes, preserving the DNA after cells divide. But the telomeres shorten with each division and Read More…

Oil-exposed fish make dangerous decisions, study finds

BBC News – Small amounts of oil can cause coral reef fish to engage in risky behaviours, according to a new study. Researchers liken the responses of oil-exposed fish to being intoxicated, and say it endangers their lives. The study found the fish often swim towards open waters, have trouble selecting suitable habitats and are slow to respond to danger. Pollution impairs their ability Read More…

A tale of two fishes: Biologists find male, female live-bearing fish…

Phys Org – Male live-bearing fish are evolving faster than female fish, according to a Kansas State University study, and that's important for understanding big-picture evolutionary patterns. Researchers Michael Tobler, associate professor of biology, and Zach Culumber, former university postdoctoral research associate and current postdoctoral researcher at Florida State University, Read More…

After ‘freezing’ in fear, what part of the brain helps make fish…

Medical Xpress — The brain is the body's mission control center, sending messages to the other organs about how to respond to various external and internal stimuli. Located in the forebrain, the habenular region is one such message-conducting system. Two new papers from Carnegie scientists explain how the habenulae develop and their unsuspected role in recovering from fear. Found in Read More…

Cryopreservation breakthrough could bring endangered fish ‘back…

Daily Mail — A breakthrough in the process of cryogenically preserving zebrafish embryos could help to conserve some of the world's most endangered fish. As fish populations become increasingly threatened, scientists say their new preservation method could help establish banks of frozen germ cells and embryos. These could one day help to replenish the oceans and save coral reefs as well as Read More…

Listening to fish love songs can predict their numbers

Science News for Students — Life beneath the ocean waves isn’t quiet. In fact, some places sea sites can be downright noisy. When one fish species gathers to mate, the machine-gun-like sound of its mating “song” can get so loud it actually can be heard above the waves. Scientists now report being able to estimate how many of these fish are around just by recording their fishy love Read More…

Grad student uses high-tech medical device to study fish

William and Mary University — If you’ve spent time in the shallow waters of Chesapeake Bay or the Atlantic seaboard, you’ve likely encountered a fish with a face only a mother could love. “Toadfishes are very different from a usual fish,” says Diego Vaz, who is studying the creatures for his doctoral research at William & Mary’s Virginia Institute of Marine Science. “They Read More…

Groundwater pumping drying up Great Plains streams, driving fish…

Colorado State University — Farmers in the Great Plains of Nebraska, Colorado, Kansas and the panhandle of Texas produce about one-sixth of the world’s grain, and water for these crops comes from the High Plains Aquifer — often known as the Ogallala Aquifer — the single greatest source of groundwater in North America. A team of researchers, including Colorado State University Professor Read More…

One side to another: research leap in lamprey success

Eureka Times-Standard — Using PVC tubing and parts you can find at an irrigation store, two biologists crafted a method for lampreys to make safe passage over the 50-foot Van Arsdale dam and up the Eel River to reproduce. July marks one full year since Arcata-based U.S. Fish and Wildlife biologist Damon Goodman and fish biologist Stewart Reid crafted a tube for lampreys to migrate over Read More…