Sentences with phrase «island populations declined»

As European colonists began to settle along the coast, introducing new economic enterprises, exploiting the marine resources, and establishing Catholic missions, the native food sources were depleted, native economies were altered, and island populations declined even further.

Not exact matches

A new study says no traces of pesticides were found in lobsters collected in Long Island Sound in late 2014, boosting the belief that warming water temperatures is the main culprit in a huge lobster population decline.

By 2100 they will be beyond the reach of 70 % of king penguins, meaning these birds will need to rapidly colonize new islands or their population will decline.

«Their data show alarming declines in population and geographic ranges of endemic Hawaiian honeycreepers on the island of Kauai,» she says.

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.

Finally, populations of declining mammal species are more stable in the absence of cats, on island or in large enclosures [27], [28].

The Channel fox population on four islands — Santa Cruz, Santa Rosa, San Miguel, and Santa Catalina — declined dramatically in the 1990s, about a century after settlers first brought pigs to the islands: a move that attracted golden eagles, who found the foxes tasty, as well.

On March 5, 2004, four of the six subspecies of island fox endemic to the California Channel Islands were listed as endangered following catastrophic population declines of over 90 percent, due primarily to predation by golden eagles on the northern Channel Islands and a canine distemper outbreak on Santa Catalina Iisland fox endemic to the California Channel Islands were listed as endangered following catastrophic population declines of over 90 percent, due primarily to predation by golden eagles on the northern Channel Islands and a canine distemper outbreak on Santa Catalina IslandIsland.

By 2000, predation on island foxes resulted in population declines to 15 individuals on San Miguel and Santa Rosa Islands, and less than 80 on Santa Cruz Iisland foxes resulted in population declines to 15 individuals on San Miguel and Santa Rosa Islands, and less than 80 on Santa Cruz IslandIsland.

Decline and recovery of the island fox: a case study for population recovery.

Although some populations (principally the Farallon Islands population) have suffered steep declines since the early 1970's, the species is still numerous overall.

Conservation Status The most recent edition of the IUCN Red List of Threatened Species listed the Channel Islands slender salamander as of Least Concern since, although its Extent of Occurrence is much less than 5,000 per square kilometer, it is common and occurs in an area of extensive, suitable habitat which appears not to be under threat, it has a presumed large population, and it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

[2] A decline in island fox populations was identified in the 1990s.

In the 1990s Santa Rosa and San Miguel Islands had both breeding and wintering populations, but numbers have declined precipitously.

Similar population declines were discovered on Santa Cruz Island, where the population decreased from 2,000 adults in 1994 to less than 135 in 2000, and on Santa Rosa Island where foxes may have numbered more than 1,500 in 1994, but were reduced to 14 animals by 2000.

One prey item is adapted to high predation pressure and supports the predator population (i.e. pigs), whereas the other prey item (i.e. the island fox) is poorly adapted to predation and declines as a consequence of the predation pressure.

The island also supports a large population of feral pigs, which are no doubt responsible for the decline in sightings of pumilus in the wild by Nature Conservancy personnel and others.

On San Miguel Island, the decline began in 1994, with the adult population falling from 450 to 15 in 1999.

Conservation Status Since the island scrub - jay occurs only on one island that makes it susceptible to any major disaster, a disease outbreak, or widespread land - use changes, any of which could potentially extirpate the species or cause a severe population decline.

During the December «From Shore to Sea» lecture National Park Service Wildlife Biologist, Tim Coonan, discussed the latest efforts to save the endangered island fox following a severe, over 90 % decline in the population caused by golden eagle predation.

Although foxes have always existed at low population sizes, four island fox subspecies underwent catastrophic declines in the 1990s.

The skunks most direct competitor for resources, the island fox, had also been exhibiting a population decline which would result in less competition for the resource specific island skunk.

Using the SLAC algorithm implemented in HyPhy [34], the island group had a substantially higher mean dN / dS ratio (0.40) than mainland only (0.10), suggesting a signal of positive selection or the relaxation of selective forces associated with a decline in effective population size [35].

A comparison in indices of sea otter health and condition between the declining southwest population in Alaska and the stable Commander Island population in Russia in 2004 - 05.

Despite widespread talk of population decline, it is important to emphasize that the only countries in the world to have experienced any declines beyond ∼ 1 % have all been associated with the special circumstances of the collapse of the former Soviet Bloc (and some microstates, such as a few island nations), and even in these cases, migration has played a major role in population changes.

According to the National Park Service, after reaching declines of 95 percent just a decade or so ago, the fox population today has nearly recovered — adding that «population trend and annual survival are currently monitored to ensure that recovery proceeds apace and future threats to the park's island fox subspecies are identified.»

* distance in time from Hiroshima, the Cold War, Chernobyl, Three Mile Island, and the protest movement of the 70's (in the main) * aging population, meaning many younger respondents don't have personal experience of this negative history * immigration (in Australia particularly), from countries with nuclear power already, or which didn't have strong antinuclear movements * willingness to reconsider the option, based on both climate change, and the increasingly visible decline of fossil fuels * smarter, better educated population

In Rhode Island, the non-Hispanic White child population declined by 21 % between 2000 and 2010, while the Latino child population grew by 31 %.