Sentences with phrase «seabird numbers»

A massive rat eradication effort took place in the 1990s and was successful — getting rid of the egg - eating pests brought back burrowing seabird numbers.

With each nautical mile south into the Agulhas current, both temperature and depth of the water increase and seabird numbers build up in quality and quantity.

As the mother of an estimated 36 albatrosses, she is a symbol of success in the face of declining seabird numbers worldwide.

Seabirds number in the thousands as they congregate to feed on the abundant fish population.

Not exact matches

The so - called «walls of death» drift nets used in the Pacific, which can sometimes extend for 50 kilometres, inadvertently catch large numbers of whales, seabirds and unwanted fish.

«This once was a world that had ten times more whales; twenty times more anadromous fish, like salmon; double the number of seabirds; and ten times more large herbivores — giant sloths and mastodons and mammoths,» says Roman.

So researchers turned to two different estimation methods — one whereby total mortalities were estimated from the actual number of dead birds recovered, and another in which information on the geographic extent of the oil slick and seabird densities were used to estimate potential mortalities.

Although the number of seabird mortalities from the spill likely centers around 700,000, sources of uncertainty in the estimates indicate the number of deaths could actually lie anywhere between 300,000 and 2 million.

Although seabirds are adapted for the vicissitudes of life — forage fish numbers have large natural fluctuations — seabirds populations may decline when fishing depresses levels for many years in a row.

The disappearing sea ice is bad news for both bears and seabirds, as hungry bears are raiding nests, and the increasing predation on seabirds will likely diminish their numbers.

Although researchers have known for decades that many seabirds are in trouble, it is surprisingly hard to put a number on how fast populations decline.

Bill has conducted a number of «plankton to predator» studies in the California Current large marine ecosystem, and has written about climate effects on seabirds, marine mammals and fish.

Songbirds and seabirds may comprise the greatest volume of animals seen by Project Wildlife, but the program also cares for a large number of mammals, including nearly 1,000 opossums, each year, as well as squirrels, rabbits, raccoons, skunks, bats, and foxes.

On that same island in New Zealand, for instance, ecologists observed that, as rat numbers increased in the absence of cats, the population of seabirds whose eggs rats preyed upon declined.

Prince Island (included within the San Miguel Island column) and Santa Barbara Island support the largest number of breeding seabirds of any of the Channel Islands.

The park islands support important nesting areas for fourteen species of seabirds with a number of species reaching their northern or southern breeding distributional limits at the islands.

This brings a high concentration of fish, which attracts seabirds in high numbers.

Those numbers increase during migration, when seabirds move en masse across great distances.

Genovesa is often referred to as «Bird Island» for the vast numbers of pelagic seabirds that come here to nest.

Despite its small size, South Plaza is home to a large number of species, including a large population of sea lions, a healthy population of land iguanas — some of the smallest in the islands, numerous marine iguanas, and cliffs full of nesting seabirds, such as Swallow - tailed Gulls, Red - billed Tropicbirds, Audubon's Shearwaters, Nazca Boobies, and several other species.

It is inhabited by large numbers of pelicans, sea gulls, ospreys and Costa Rica's largest community of boobies, which makes it a very important seabird sanctuary.

Admire a variety of seabirds, such as blue - footed booby, brown noddy, terns, flightless cormorant and depending on the season, a large number of Galapagos penguins.

Due to its uniquely rich biodiversity and fragile ecosystems, oil drilling around the Lofoten Islands in Norway could have devastating impacts on an area that hosts unique cold - water reefs, huge numbers of seabirds, and pods of sperm and killer whales.

The resulting change in availability of prey has in turn caused dramatic declines in the numbers of predatory seabirds in west coast colonies and corresponding increases in the size of those colonies on the south and east coast over the same period [58].

But experts who've been counting the seabirds there say their numbers have fallen by about a third in five years.