Sentences with phrase «predator fish populations»

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.

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

Not exact matches

The changes in biomass are worrying, says Michael Hirshfield, chief scientist of the advocacy group Oceana, based in Washington, D.C. Populations of small fish tend to boom and bust — making ecosystems less stable — much more when the ranks of top predators have been gutted.

Because the smaller fish shifted to shallow waters where bass threaten them less, he explains, the algae that inhabit the more open waters of the lake were free of their predators and their populations fluctuate more.

With no predators in these places, like fish, to eat the larvae, the Aedes aegypti population grows rapidly.

With huge metabolic demands — and large populations before humans started hunting them — great whales are the ocean's ecosystem engineers: they eat many fish and invertebrates, are themselves prey to other predators like killer whales, and distribute nutrients through the water.

A relative lack of tourism in northern Cyprus has been a boon to turtle populations, which are threatened by development and beach erosion, as well as predators, marine trash, and getting caught in fishing nets.