explains the surrogate brood-stocking technique used to produce a rainbow trout from sterile salmon.
is a research specimen that is being held by University of Virginia Biology Professor, DeForest Mellon.
A Grass Snake, named Sid, tackles a goldfish ten times the size of his head, and snakes like Sid wonder, why we just don't trust them?
Papa salmon plus mama salmon equals ... baby trout? Japanese researchers put a new spin on surrogate
parenting as they engineered one fish species to produce another, in a quest to preserve endangered fish. Idaho
scientists begin the next big step next month, trying to produce a type of salmon highly endangered in that state — the
sockeye — this time using more plentiful trout as surrogate parents. The new method is "one of the best things that has
happened in a long time in bringing something new into conservation biology," said University of Idaho zoology professor
Joseph Cloud, who is leading the U.S. government-funded sockeye project. The Tokyo University inventors dubbed their
method "surrogate broodstocking." They injected newly hatched but sterile Asian masu salmon with sperm-growing cells
from rainbow trout — and watched the salmon grow up to produce trout. Click
North America’s diverse community of freshwater mussels has been on the decline for decades and is
presently considered one of the continent’s most endangered groups of animals. The reasons for this continued decline
are examined in a special section of the latest issue of Environmental Toxicology and Chemistry. Mussels are a critical
component of the food chain because they are a food source for aquatic and terrestrial vertebrates, and they provide
nutrient and energy cycling in streams and lakes by filtering algae, bacteria, and organic matter from the water column.
While 35 species of mussels are already extinct, 70 are listed as threatened or endangered, and nearly 180 species are
critically imperiled or vulnerable. Species declines are likely due to a number of problems, including construction of
dams, sedimentation, population, channelization, dredging, and introduction of exotic species. Click
Words like taxonomy and symbiosis may not be typical in
elementary level science curriculum. In fact, some students don't learn about plant and animal classifications or the
mutual benefits of different species cohabitating until high school. But the principal at Valley View Elementary School
expects that students will gain a plethora of such biological knowledge through a new campus aquatic observation
Voyage to the bottom of the sea, or simply look along the bottom of a clear stream and you
may spy lobsters or crayfish waving their antennae. Look closer, and you will see them feeling around with their legs
and flicking their antennules – the small, paired sets of miniature feelers at the top of their heads between the long
antennae. Both are used for sensing the environment. The long antennae are used for getting a physical feel of an area,
such as the contours of a crevice. The smaller antennules are there to both help the creature smell for food or mates or
dangerous predators and also to sense motion in the water that also could indicate the presence of food, a fling or
danger. The legs also have receptors that detect chemical signatures, preferably those emanating from a nice hunk of
dead fish. Click here
It may only be small. But, as the picture shows, what this grass snake lacks in size it more
than makes up for in ambition. It has taken to eating goldfish more than ten times the size of his head after
discovering them in Valerie and Raymond Bell's pond. His eyes may be bigger than his stomach, but that hasn't stopped
Sid, the grass snake, from gobbling up goldfish more than ten times the size of his head for dinner. Click
Cow manure and fish guts and maggots. It could all soon be dinner — if you are a rainbow
trout. University scientists here are working on a new maggot-based feed capable of fattening rainbows for the dinner
table, while simultaneously helping slash growing mounds of manure and fish entrails. Aquatic species veterinarian
Sophie St. Hilaire suggested there was a way the two industries could help one another — with dairies using a slurry of
cow dung and trout intestines to grow maggots rich in fatty acids that make fish better for humans. Click
The yellow school buses are back on the roads, and that means Angel's headed back to school
again. He doesn't have a new backpack or a brown bag lunch but that's OK -- because Angel's a turtle, owned by
kindergarten teacher Vanessa Santamaria, who chose a turtle for her class at Our Community School in North Hills,
Calif., partly because she is allergic to pets with fur. But aside from that benefit, teachers are finding that class
pets from the world of the scaly, slimy and buggy can be just as fascinating for kids as a traditional hamster or guinea
A Big Sincere Thank-you
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Dan from Dallas, who is now Dan from San
and Evan from Colorado.
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