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Latest Ichthyology Stories

Adipose Fins Evolve Repeatedly In Teleost Fishes
2014-03-05 10:33:13

University of Chicago Though present in more than 6,000 living species of fish, the adipose fin, a small appendage that lies between the dorsal fin and tail, has no clear function and is thought to be vestigial. However, a new study analyzing their origins finds that these fins arose repeatedly and independently in multiple species. In addition, adipose fins appear to have repeatedly and independently evolved a skeleton, offering a glimpse into how new tissue types and structural...

Shark's Eye View Of The Ocean
2014-03-01 05:42:24

April Flowers for redOrbit.com - Your Universe Online Researchers from the University of Hawaii and the University of Tokyo are gaining novel insights into how one of the most feared and least understood ocean predators swims, eats and lives — all courtesy of instruments strapped onto and ingested by sharks. The sharks were outfitted with sophisticated sensors and video recorders to measure and see where they are going, how they are getting there, and what they do once they reach...

Fate Of Fish Stocks In The Baltic Sea Determined By Salt Stratification
2014-02-19 15:39:07

GEOMAR Helmholtz Centre for Ocean Research Kiel Why management strategies must take into account regional conditions In the Baltic Sea, two cod stocks evolve independently. Also the juveniles of two economically important flatfish species, flounder and plaice, live there within limited space. This is possible due to the irregular distribution of water masses of different salinity in this inland sea. Scientists of GEOMAR Helmholtz Centre for Ocean Research Kiel and the Institute of...

2014-02-18 13:47:56

Archaeological data indicate modern herring management needs to take a longer look into the past to manage fisheries for the future says a new study involving Simon Fraser University researchers. That is one of the key findings in the study, just published online in Proceedings of the National Academy of Sciences (PNAS). SFU researchers Iain McKechnie, Dana Lepofsky and Ken Lertzman, and scientists in Ontario, Alberta and the United States are its co-authors. The study is one of many...

Mesopelagic Fish Biomass Is 10 Times Higher Than Estimated
2014-02-10 06:40:49

Spanish National Research Council (CSIC) The stock of mesopelagic fish changes from 1,000 to 10,000 million tons With a stock estimated at 1,000 million tons so far, mesopelagic fish dominate the total biomass of fish in the ocean. However, a team of researchers with the participation of the Spanish National Research Council (CSIC) has found that their abundance could be at least 10 times higher. The results, published in Nature Communications journal, are based on the acoustic...

Effects Of Catch-and-release Fishing On Sharks Examined In New Study
2014-01-30 15:45:04

[ Watch The Video: Catch-And-Releasing Sharks ] University of Miami Rosenstiel School of Marine & Atmospheric Science Researchers analyze blood chemistry, reflexes, and post-release survival of five coastal shark species in South Florida A new study led by scientists at the University of Miami (UM) Abess Center for Ecosystem Science and Policy and the Rosenstiel School of Marine and Atmospheric Science investigated how several species of coastal sharks respond to stress from...

2014-01-29 23:20:45

In a historic biological achievement, Newport Aquarium announced Wednesday that Sweet Pea, the first documented shark ray to breed in a controlled environment, gave birth to seven pups on Friday, Jan. 24, 2014. Newport, KY (PRWEB) January 29, 2014 In a historic biological achievement, Newport Aquarium announced Wednesday that Sweet Pea, the first documented shark ray to breed in a controlled environment, gave birth to seven pups on Friday, Jan. 24, 2014. With Sweet Pea housed at an...

Sharks And Rays Face Extinction
2014-01-23 15:00:41

Lee Rannals for redOrbit.com - Your Universe Online According to a new study published in eLife, a quarter of the world’s sharks and rays face extinction within the next few decades due to overfishing. The latest study is the first to survey the cartilaginous fish status throughout coastal seas and oceans, revealing that 249 out of 1,041 sharks and rays fall under three threatened categories on the International Union for Conservation of Nature's (IUCN) Red List. “We now know that...

War On Lionfish Can Aid In Recovery Of Native Fish
2014-01-23 14:17:58

Oregon State University It may take a legion of scuba divers armed with nets and spears, but a new study confirms for the first time that controlling lionfish populations in the western Atlantic Ocean can pave the way for a recovery of native fish. Even if it’s one speared fish at a time, it finally appears that there’s a way to fight back. Scientists at Oregon State University, Simon Fraser University and other institutions have shown in both computer models and 18 months of...

2014-01-21 08:27:48

GLAND, Switzerland, Jan. 21, 2014 /PRNewswire-USNewswire/ -- A quarter of the world's sharks and rays are threatened with extinction, according to IUCN Red List(TM) criteria, with rays at greater risk than sharks. The findings, published today in the journal eLife, are part of a global assessment of 1,041 species conducted by the IUCN Shark Specialist Group. Ray and sharks are at substantially higher risk than most other groups of animals and have the lowest percentage of species...


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
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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