Sentences with phrase «breed population»

This shore is world - famous for supporting nearly the entire breeding population of gray whales, a species that has recently recovered from the brink of extinction.

Furthermore, our current knowledge of their global breeding population is limited.

Because the people on the moon would be a self - contained breeding population independent from us, they would be considered a new species according to the evolutionary definition of the term.

It can only be applied to randomly bred populations, where there is no selection of breeding stock, and all offspring have an equal chance to produce the next generation.

Analysis of mitochondrial and nuclear genes has also offered clues, for example confirming that some birds have geographically distinct breeding populations.

Changing water levels, direct disturbance by humans, and development have diminished breeding populations.

He says the findings could encourage more effective conservation strategies that work across national borders to restore breeding populations by preventing habitat loss in the wintering grounds.

Popular sires in large and small breed populations affect them differently.

Scientists estimate an established breeding population of Asian carp could devastate Lake Michigan's $ 7 - billion commercial and sport fishery by devouring the food sources native fish need to survive.

Large breeding populations of Western Gulls, Cassin's Auklets, and Brandt's Cormorants occur on the Park islands.

Biologists established a captive breeding population in zoos, some of which FWS released back into the wild starting in 1987.

Specifically, the authors of this and other studies cite the inherent difficulties in breed identification (especially among mixed - breed dogs) and in calculating a breed's bite rate given the lack of consistent data on breed population and the actual number of bites occurring in a community, especially when the injury is not deemed serious enough to require treatment in an emergency room (Sacks et al., 2000; AVMA, 2001; Collier, 2006).

«For the first time,» co-author C. Page Chamberlain of Stanford University notes, «we have evidence that it may be possible to restore breeding populations in the north by preventing habitat loss in the south, allowing us to develop an international conservation strategy for dealing with songbirds.»

Since the creation of kennel clubs, breeding has been selective: but even that was disrupted by World Wars I and II, when breeding populations all over the world were decimated or went extinct.

For example, figures from the UK's Joint Nature Conservation Committee suggest the British breeding population of herring gulls has halved since the late 1970s.

Studies in Scotland and Wales both suggest that killing foxes leads to a slightly higher breeding population the next year, probably because more foxes move in to contest the vacant area than were there in the first place.

The study compiles data from 20 years of field studies and suggests that if current trends continue, forests managed as short - rotation pine plantations will support the majority of Swainson's warbler breeding populations by the end of the 21st century.

As previous population estimates did not take account of 16 of the 46 colonies (see Figure 3), and many previous counts were of poor quality and widely separated in time [11], [12], [23] these historical estimates can not be considered representative of the total breeding population of emperor penguins (previous counts are given for comparison in Table 1).

The purpose of the parent club is to bring the breeders together, form a breed standard, and begin breeding for dogs that match that standard, building a viable breed population that can sustain itself without the introduction of further breeds into the gene pool.

[10] The California breeding population is now demographically isolated from the population in Baja California.

With such a limited breeding population, even a small number of deaths from disease can be the difference between the survival of a population or extinction.»

Indeed, the nearest healthy breeding population of jaguars is located 120 miles south of the line in Sonora.

The finding could explain the decline in the southern breeding populations, as Hispaniola has suffered severe deforestation, says Rubenstein.

Because the western Atlantic breeding populations have been declining over the past few decades, the fishing quota for nations that fish this unit has been set considerably lower than the quota for eastern Atlantic tuna fishing.

Previous genetic studies had shown that the warblers have separate breeding populations in the eastern and western United States.

Sperm collected from the same breeding population of dogs, and testes recovered from dogs undergoing routine castration, were found to contain environmental contaminants at concentrations able to disrupt sperm motility and viability when tested.

«The next step is to find out which stowaways will have the greatest chance to survive the journey in ballast tanks or on the ship hulls, and which are most likely to establish breeding populations after arriving in the Arctic.

«There are more than 400 breeds of dog, and each is an isolated breeding population,» Ostrander explains.

Liam Dougherty at the University of Western Australia and his colleagues have now found a correlation between the thickness of female reproductive tracts and the length of penis spikes in 13 independently bred populations of the cowpea seed beetle (Callosobruchus maculatus).

Although widespread, the species is a recent arrival from more southerly latitudes: the first breeding population established itself in 1996.

Because the earth people and the moon people would be two independent breeding populations, they could be classified by evolutionists as two separate species.

In fact, he has netted the same Golden - winged three years in a row in a band of forest in Costa Rica, where some birds of the Great Lakes breeding population spend the winter.

Relationships with sea - ice variability, the Southern Annular Mode and prey and predator abundance all have the potential to modulate the annual breeding population.

Using these estimates our October breeding population estimate therefore may represent a global population of around 595,000 ± 81,753 individual birds, pre-breeding, i.e. before chicks of the year have hatched.

No doubt about it, this will have reduced the numbers of affected hounds and carriers within the International breed population.

Conservation biologists have recently raised the Ne (effective population size) from 50 to 100 unrelated individuals needed to maintain a sustainable breeding population.

(Cull, place in pet home, etc.) I think that with the current breeding population so heavily slanted toward black tri-colour, there is a significant risk for many more liver coloured animals to be produced.

Fortunately, the frequency of genes for dominant diseases in most breed populations will be much lower than what is typical for recessive traits because there are no normal carriers who might slip unidentified into a pedigree.

But in a country with a tiny breed population or where the population has a limited founder base and a high frequency of the HSF4 mutation, the national clubs in those places may need to develop a multi-generational plan for slowly reducing the frequency of the mutation.

In North America, home to the bulk of the world breed population the frequency will be very close to that seen in the overall test results.

Shorty's Charities — The goal is to participate in public speaking engagements, off spay and neuter assistance, information resource, and enlighten Bully Pit Bull breeders of their contribution to the homeless pit bull bully breed population.

This region, which is about 100 miles south of the Arizona border is home to the northernmost breeding population of Jaguars.

The randomized study reveals a current 2 % PFK mutant allele frequency in the field trial ESSP breeding population.

Notably though, the overall prevalence within the mixed - breed population exceeded 4 % possibly reflecting the breeds at risk to IVDD contributing to the ancestry of a mixed - breed dog.