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Latest Ichthyology Stories

2009-06-29 10:03:58

It might be assumed that aquarium fish don't mind who or what they encounter in their tanks from one minute to the next, if their famously (but incorrectly) short memory is to be believed. Scientists at the Universities of Plymouth and Exeter have carried out research to show this is not the case and are striving to improve conditions for keeping fish in home aquaria.In line with the aim to establish welfare guidelines for fish, these researchers have been collaborating with the WALTHAM...

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2009-06-25 11:30:00

A major conservation survey assessed 64 species of open ocean sharks and rays and found that one third of them face extinction, including the great white shark. The study by the International Union for Conservation of Nature (IUCN) reported that species hunted on the high seas are particularly at great risk, with over half in danger of extinction. The IUNC named tuna and swordfish fisheries as the main culprits for their accidental "by-catch" of sharks. Sharks are also being increasingly...

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2009-06-18 05:40:00

Scientists have discovered that sticklebacks exhibit an advanced, sophisticated learning technique never before seen in the animal world.  The research reveals that the learning methods of fish may resemble that of humans more than previously believed. The study, conducted by researchers at St. Andrews University and Durham University in Britain, found that nine-spined sticklebacks can observe others to make better decisions. This ability to select the best food patch by comparing how...

2009-06-16 14:43:06

Officials involved in preserving fish in the Chicago River said the Fish Hotel, a series of underwater islands made of fish food, has opened for a fifth season. Margaret Frisbie, executive director of Friends of the Chicago River, said the Fish Hotel, which from outside of the water looks like a garden on top of the water, involves submerged islands of coconut fiber to provide the river's fish with a healthy food source, the Chi-Town Daily News reported Tuesday. It's important because there...

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2009-06-10 15:35:00

How fast can evolution take place? In just a few years, according to a new study on guppies led by UC Riverside's Swanne Gordon, a graduate student in biology.Gordon and her colleagues studied guppies "” small fresh-water fish biologists have studied for long "” from the Yarra River, Trinidad. They introduced the guppies into the nearby Damier River, in a section above a barrier waterfall that excluded all predators. The guppies and their descendents also colonized the lower...

2009-06-08 14:11:10

U.S. scientists looking at adaptation and survival in a wild population found guppies can adapt to new surroundings in just a few years. A research team led by Swanne Gordon from the University of California-Riverside found guppy populations introduced into new habitats developed new and advantageous traits in just a few years. Gordon and colleagues studied 200 guppies that had been taken from the Yarra River in Trinidad and introduced into two different environments in the nearby Damier...

2009-06-02 14:30:00

Study finds guppies adapt to new surroundings in just a few yearsWhat's the secret to surviving during times of environmental change? Evolve"¦quickly.A new article in The American Naturalist finds that guppy populations introduced into new habitats developed new and advantageous traits in just a few years. This is one of only a few studies to look at adaptation and survival in a wild population.A research team led by Swanne Pamela Gordon from the University of California, Riverside...

2009-05-23 18:30:33

With shark populations tumbling around the world, Chinese cooks are turning to manta and devil rays to fill their shark fin soup pots. Until recently, the rays were targeted only by subsistence fishermen, The Times of London reported Friday. Now, about 1,500 big manta rays are taken every year in the Indonesian fishing port of Lamakera. Tim Clark of the University of Hawaii said the rays could be overfished quickly. They have a long lifespan -- possibly more than 50 years -- and do not begin...

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2009-05-08 07:21:18

Researchers have discovered where basking sharks "“ the world's second largest fish "“ hide out for half of every year, according to a report published online on May 7th in Current Biology, a Cell Press publication. The discovery revises scientists' understanding of the iconic species and highlights just how little we still know about even the largest of marine animals, the researchers said. "While commonly sighted in surface waters during summer and autumn months, the...

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2009-05-06 08:15:00

Overfishing deemed most likely cause Sharks, barracuda and other large predatory fishes disappear on Caribbean coral reefs as human populations rise, endangering the region's marine food web and ultimately its reefs and fisheries, according to a sweeping study by researcher Chris Stallings of The Florida State University Coastal and Marine Laboratory. While other scientists working in the Caribbean have observed the declines of large predators for decades, the comprehensive work by Stallings...


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
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'