Sentences with phrase «predator fish»

There he probes how predator fish and their prey interact.

Because dangerous mercury levels in some fish can impair a baby's brain development, the FDA recommends that you avoid eating large predator fish such as swordfish and king mackerel.

The introduction of predator fish such as bass and northern pike has dealt with the goldfish problem, and now the Park District wants to get a handle on erosion and landscaping woes.

The many marine animals that depend on them would lose their food source, predator fish populations would fall and the effects would likely ripple throughout the entire food web, hurting organisms that don't even rely on those fish directly.

The BRUV project is part of a collection of researchers from Florida International University (FIU) to estimate and compare the relative abundance of predator fish species, including sharks and rays, inside and outside marine protected areas (MPA's).

In her research, she has found that people who eat top predator fish like shark, swordfish and marlin have more mercury in their blood but not necessarily more omega 3's and selenium — a nutrient that is abundant in fish — than people who eat seafood that is lower on the food chain, like sardines, shellfish, anchovies and herring.

In most waterways, predator fish quickly nibble up any hapless goldfish that has the misfortune to be liberated.

Also, the rocks must be piled deep enough to form crevices that protect eggs from being washed downstream or consumed by predator fish.

Limit predator fish, like tuna, to no more than 3 servings per week.

For example, Molly felt strongly about putting the edge of a net in the picture of the top predator fish in Ocean Sunlight to indicate the whole subject of human use of the seas, something we do not touch on in the book.

Most of the activity at this site is at the tip of the split where large schools of silversides can be found here along with bigger predator fish.

Reef fish life is abundant and the deep walls and brisk currents at some of the sites attract grey reef, hammerhead and thresher sharks, and other predator fish such as mackerel, barracuda and jacks.

And an ever - present on night dives are hunting tarpon - a rather grumpy looking 3 - foot long predator fish, huge groupers and jacks.

Large predator fish frequently patrol the precipitous abysses of Lighthouse Reef.

Paper co-authors Abel Valdivia at the Center for Biological Diversity in San Francisco and Courtney Cox at Smithsonian Marine Station at Fort Pierce, Florida, surveyed 143 fish species at 110 sites across 43 Caribbean coral reefs that varied in the amount of fishing pressure sustained — ranging from marine preserves that banned all fishing to heavily fished reefs where large predator fish are almost gone.

Instead, the large reductions in fish urine were driven by the reduction of large - bodied fish and predator fish such as grouper, snapper or barracuda that occurs through selective fishing practices.

So the predator fish populations rebounded, and they grazed down their prey.»

As microorganisms consume the methylmercury, the metal accumulates and migrates up the food chain; that is why the largest predator fish (sharks and swordfish, for example) typically have the highest concentrations.

The researchers found that reefs with more large, predator fish had healthy levels of nutrients, while reefs depleted of large fish had nearly 50 percent fewer nutrients, including phosphorus and nitrogen, essential to their survival.

Fewer large - bodied and predator fish to urinate nutrients into the water, the study found.

Coral reefs continue to decline in the Caribbean and worldwide, but curbing fishing practices that target large predator fish could help reefs recover, Allgeier said.