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Latest Ichthyology Stories

2009-04-29 10:14:26

A U.S. researcher says he has developed a test that suggests fish can feel pain and they react to it much as do humans. Purdue University Assistant Professor Joseph Garner and Janicke Nordgreen, a doctoral student in the Norwegian School of Veterinary Science, attached small foil heaters to goldfish and slowly increased the temperature. Half of the fish were injected with morphine, and the others received saline. The researchers believed those with the morphine would be able to withstand...

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2009-04-14 08:23:14

Lateral line sensory system detects vibrations from unseen prey Most fish rely primarily on their vision to find prey to feed upon, but a University of Rhode Island biologist and her colleagues have demonstrated that a group of African cichlids feeds by using its lateral line sensory system to detect minute vibrations made by prey hidden in the sediments. The lateral line system is composed of a canal embedded in the scales along the side of the body of a fish, around its eyes and on its...

2009-04-09 08:00:30

U.S. biologists say DNA research shows giant whale sharks, a species threatened by over-fishing, don't always remain in protected waters. University of Illinois-Chicago geneticists led by Associate Professor Jennifer Schmidt studied the DNA of 68 whale sharks from 11 locations across the Indian and Pacific oceans and the Caribbean Sea. Our data show whale sharks found in different oceans are genetically quite similar, which means that animals move and interbreed between populations, said...

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2009-04-08 08:23:52

Whale sharks -- giants of the fish world that strike terror only among tiny creatures like the plankton and krill they eat -- are imperiled by over-fishing of the species in parts of its ocean range. That threat is underscored in a new study from geneticists led by Jennifer Schmidt, University of Illinois at Chicago associate professor of biological sciences, reported online April 7 in the journal PLoS One. Schmidt and her colleagues studied the DNA of 68 whale sharks from 11 locations across...

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2009-03-27 06:45:00

Conservationists are now able to watch the movement of large groups of fish as they gather into sandbanks. According to a report in Friday's edition of the journal Science, researchers were able to watch Atlantic herring gather off Georges Bank near Cape Cod, Mass., where they spawn during the night. At dawn, the mass of fish return to the deep and scatter. According to Nicholas C. Makris, professor of mechanical and ocean engineering at the Massachusetts Institute of Technology, the team...

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2009-03-24 07:45:00

The genetic toolkit that animals use to build fins and limbs is the same genetic toolkit that controls the development of part of the gill skeleton in sharks, according to research to be published in Proceedings of the National Academy of Sciences on March 23, 2009, by Andrew Gillis and Neil Shubin of the University of Chicago, and Randall Dahn of Mount Desert Island Biological Laboratory. "In fact, the skeleton of any appendage off the body of an animal is probably patterned by the...

2009-03-19 15:43:22

Singaporean and British scientists say they used genome sequencing to discover the elephant shark can see colors much in the same way humans can. Byrappa Venkatesh of Singapore's Institute of Molecular and Cell Biology, and Professor David Hunt of the University College London's Institute of Ophthalmology said the finding might enhance scientists' understanding of how color vision evolved in early vertebrates during the past 450 million years. The elephant shark is a primitive deep-sea fish...

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2009-03-19 14:52:29

British scientists said Thursday, that a shoal of robotic fish that can detect pollution in the water are set to be released into the sea off Spain. The 1.5 meter long fish resemble carp and can be fitted with detectors that can identify the sources of pollution, such as ship fuel or chemicals in the water. Five of the robots are being released into the Bay of Biscay at Gijon in northern Spain as part of a three-year joint project between engineering consultancy BMT Group and researchers at...

2009-03-09 13:20:47

Fifteen-year-old boys who eat fish at least once a week achieve higher intelligence scores, Sweden researchers found. The study of nearly 4,000 teenagers, published in the March issue of Acta Paediatrica, found eating fish once a week was enough to increase combined, verbal and visuospatial intelligence scores by an average of 6 percent, while eating fish more than once a week increased them by just under 11 percent. Swedish researchers compared the responses of 3,972 males who took part in...

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2009-03-09 14:18:30

Fifteen-year-old males who ate fish at least once a week displayed higher cognitive skills at the age of 18 than those who it ate it less frequently, according to a study of nearly 4,000 teenagers published in the March issue of Acta Paediatrica. Eating fish once a week was enough to increase combined, verbal and visuospatial intelligence scores by an average of six per cent, while eating fish more than once a week increased them by just under 11 per cent. Swedish researchers compared the...


Latest Ichthyology Reference Libraries

Prowfish
2014-05-30 12:05:29

The prowfish (Zaprora silenus) is a subtropical species of a perch-like fish found in the northern Pacific Ocean. The range of the prowfish is from the Aleutian Islands, Alaska to Kamchatka, Russia, from Navarin Canyon in the Bering Sea to Hokkaido, Japan and Monterey, California. The preferred habitat of the prowish is rocky bottom at a maximum of 2,200 feet in depth where they spend most of their adult life. Prowfish can grow to a length of 40 inches or more having an elongated body that...

Bluefish, Pomatomus saltatrix
2013-10-22 10:54:52

The Bluefish (Pomatomus saltatrix) is the only living species of the family Pomatomidae. It is a marine pelagic fish that can be found around the world in temperate and subtropical waters, except for the northern Pacific Ocean. Bluefish are known as tailor in Australia, shad on the east coast of South Africa, and elf on the west coast. Other common names regarding this fish are blue, chopper, and anchoa. It is a good eating and game fish. The bluefish is moderately proportioned with a...

Ichthyology
2013-10-02 13:31:45

Ichthyology is the study of fish that focuses on many types of fish including cartilaginous fish, jawless fish, and skeletal fish. This branch of zoology can be associated with marine biology and fisheries science, as well as other areas of study. Ichthyologists, those who practice ichthyology, have discovered more than 32,200 species of fish, and it is thought that they discover 250 new species each year. Humans first began to study fish during the Upper Paleolithic Revolution, when humans...

Little tunny, Euthynnus alletteratus
2013-03-28 14:07:39

The little tunny is found widespread in temperate and tropical waters of the Atlantic Ocean, Black Sea and Mediterranean Sea. It is the most common tuna and is highly migratory, with a range from Cape Cod, Massachusetts to Brazil in the Western Atlantic. In the Eastern Atlantic it is found from Skagerrak to South Africa. The little tunny will form schools close to the shoreline, around inlets, and sandbars that can cover up to two miles. This fish prefers warm water and will migrate south in...

African Sharptooth Catfish, Clarias gariepinus
2013-02-09 08:30:28

Image Credit: WA Djatmiko/Wikipedia (CC BY-SA 3.0, 2.5, 2.0 and 1.0) The African sharptooth catfish is native throughout Africa, and the Middle East, and in the 1980’s it was introduced all over the world. This catfish lives on muddy bottoms in freshwater lakes, rivers, swamps, man-made habitats, and occasionally found in urban sewage systems. This species is able to crawl across dry ground to another body of water when one pool dries up. It is also able to survive for long periods of...

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Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'