Sentences with phrase «of predatory fish»

Such is the desperate status of the lionfish wars, an invasion of this predatory fish from the Pacific Ocean into the Bahamas and Caribbean region that threatens everything from coral reef ecosystems to the local economies, which are based on fishing and tourism.

Also, many of the predatory fish species used in sushi, such as salmon, have high amounts of potentially dangerous substances, including pesticides and heavy metals like mercury.

shark A type of predatory fish that has survived in one form or other for hundreds of millions of years.

«A stable and healthy reef includes a high abundance and diversity of predatory fish and a relatively low number of herbivorous and small prey fish,» says study lead author April Boaden, a PhD student at the Coral CoE.

Threespot Damselfish populations have exploded in recent years due to overfishing of predatory fish such as groupers and snappers.

One particularly interesting question was if and how this behavior would change in the presence of the predatory fish.

Tangles of fishing line caught in the corals are a testament to the fishermen's persistence, and the bodies of predatory fish hanging in the market leave little doubt as to where some of the fish are going.

Not exact matches

Research from Dalhousie University suggests that given just 15 years, a modern industrialized fishery can reduce the biomass of large predatory fish communities by 80 %.

But some types of seafood — particularly large, predatory fish such as shark, swordfish, king mackerel and tilefish — can contain high levels of mercury.

From fishery records, however, primarily Japanese longline [fishing] records, scientists [have] realized that about 90 percent of all big predatory fishes are gone.

Pyenson et al. report that the site, Cerro Ballena, dates to the Late Miocene period and consists of over 40 skeletons of marine vertebrates, including rorqual and sperm whales, seals, predatory fishes, and fascinating, now completely extinct, species such as walrus - whales and aquatic sloths.

Swordfish are large, highly migratory, predatory fish characterized by a long, flat bill in contrast to the smooth, round bill of the marlins.

Triassic Neopterygii primarily developed small species while the majority of the more basal ray - fins produced large predatory fish.

This is the story of one of the winners, a small, shell - crushing predatory fish called Fouldenia, which first appears in the fossil record a mere 11 million years after an extinction that wiped out more than 90 percent of the planet's vertebrate species.

While the jawed vertebrate lineage spawned the majority of vertebrate life that exists on Earth today — «evolutionarily speaking, we are all bony fish,» says Gillis — lamprey and hagfish are the living remnants of a once extensive assemblage of primitively predatory jawless vertebrates.

Swiss and U.S. American researchers led by the Paleontological Institute and Museum of the University of Zurich have discovered the fossil remains of one of the earliest large - sized predatory fishes of the Triassic period: an approximately 1.8 - meter - long primitive bony fish with long jaws and sharp teeth.

«Despite this, we have demonstrated that great differences in the abundance of predatory reef fish, and of their prey, can be attributed to humans,» Professor Kingsford says.

Now researchers from the ARC Centre of Excellence for Coral Reef Studies (Coral CoE) at James Cook University have found that removing predatory fish such as coral trout and snapper, through fishing, causes significant changes to the make - up of the reef's fish populations.

Last May biologists at Dalhousie University in Halifax, Nova Scotia, reported that global stocks of large predatory fish have declined by 90 percent since industrial fishing began in the mid-1950s.

But with climate change ripping away the ice shield protecting the ocean, vast stores of mineral and hydrocarbon wealth — and maybe fish stocks too — are becoming exposed to humanity's most predatory instincts.

In the new study, Becker's team observed the interactions between cleaner shrimp and various species of parasite - laden predatory fish in the wild.

The fossilized food remains of the extinct predatory fish Saurichthys reflect its spiral - shaped intestine.

Dunkleosteus grew up to 33 feet long and was the largest of a group of armor - plated predatory fish, the placoderms.

And just because a region receives above - average deposition doesn't mean that it will have high levels of methyl mercury, the form that builds up in long - lived predatory fish such as trout, pike, tuna and swordfish.

Removing too many herbivorous and predatory fish species deprives coral reefs of critical ecosystem functions and the capacity to respond effectively to other disturbances.

The researchers propose that adding insulin to the mix of venom toxins enabled predatory cone snails to disable entire schools of swimming fish with hypoglycemic shock.

«Predatory fish will not eat those fishes because they think they are venomous and going to cause them harm, but this protection provided also allows some of these mimics to get very close to unsuspecting fish to feed on them, by picking on their scales as a micropredator,» says study co-author Nicholas Casewell of the Liverpool School of Tropical Medicine.

Qingmendous, a 409 million - year - old predatory fish provides unique insights into the early evolution of modern lobe - finned fishes.

These species facilitate the transfer of energy to higher trophic levels by consuming very small prey and then being eaten by larger, predatory fish and other marine animals.

The American Heart Association generally recommends that people eat fish at least twice a week, limiting their consumption of large, predatory fish that might have higher mercury levels.

Minimize the consumption of large predatory fish (swordfish, tuna, etc) as they are higher in mercury.

Limiting exposure to methylmercury - laden predatory fish like tilefish from the Gulf of Mexico, shark, swordfish, and king mackerel (27) can go a long way in avoiding methylmercury accumulation.

However, predatory are not a preferred source of fish oil because of a high risk of contaminants such as mercury.

Other sources of mercury include coal - burning industrial plants, large predatory ocean fish, river fish, and dental amalgams.

These toxins become concentrated in older fish, large predatory fish, and in fatty species of fish.

Kirshbaum had been given a directive to land big fish and the resources to do so, but he struggled to sign well - known authors to Amazon Publishing, in part because signing with one of its imprints effectively locked you into one retail platform: most retailers, including Barnes & Noble, don't usually stock books published by Amazon in retaliation for the retailer's many predatory practices.

Fortunately, most of the miniature species of fish available to the trade are not predatory on other fish species.

I really like them as a food for any predatory species of fish — freshwater or marine.

Possible over-fishing of tuna could be an indirect threat, as predatory fish herd shoals of small fish to the surface where they become available to surface - feeding seabirds (Ratcliffe 1999).

Plenty of fish will turn over a starfish and eat it, but there are also predatory species of starfish that attack fish that live on the substrate.

Warn your customers that many predatory species of fish will eat regular and hermit crabs, while snails are rarely the object of predation.

In 2011, he joined the California State University, Long Beach Shark Lab, where his Master's degree work focused on analyzing movements of juvenile predatory fishes to assess the landscape connectivity, habitat use and effectiveness of restored estuaries.

Eagles are predatory birds known for their ability to snatch fish out of the water.

Animal life in the cave includes a large population of bats, large fresh water crabs, crayfish, catfish and other tropical fish, Large invertebrates like Amblypygi and various predatory spiders also inhabit the cave.

Fishing with miles - long lines of baited hooks has spread around the world in the past few decades and has removed up to 90 percent of the large predatory species, including tunas, billfish and sharks, according to a variety of recent studies.

The invasion of Bythotrephes into lakes in the northern US and Canada is unrelated to climate change, but is closely tied to the presence of a deep water, low light relative warm refuge from predatory fish.

Overall, 90 percent of the world's large predatory fish are in decline [4].

The university reports, «Over a six - year period, researchers investigated the stomach contents of 595 fish representing 10 predatory open - ocean species, including commercially valuable tunas and billfishes.

The coal industry downplays the serious threat of mercury in our food chain (particularly in predatory ocean fish like swordfish and tuna), by saying that there's more «naturally - occurring» mercury in our oceans and rivers so their mercury emissions couldn't possibly be harming Americans.