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Tag: "breeding" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...ic feedlots providing the ideal conditions for the breeding and spread of sea lice amongst the adult fish. For the migrating wild salmon, the farm is a concentrated point source of infectious lice larvae. "We found lice levels exceeded what we would find normally, extending for 30 km ?even though the farm is...

Ants Genetic Engineering Leads To Species Interdependency

...ent from the researchers' own attempts atselective breeding and genetic engineering, combining genomes is aneasy way to produce novel characteristics that may be highlyadvantageous for growth, environmental tolerance, or diseaseresistance.Regardless of the specific advantages, however, it is clear that thesea...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...e said. The researchers found that the density of breeding seabirds on fox-free islands was two orders of mag...nds since 1971, said most of the islands had major breeding colonies of seabirds before the arrival of foxes. There are about 26 species of seabirds that regula...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...s declined due to competition from highland cattle breeding where pastures may be used all year round. The analysis says "new landowners from outside the Pantanal frequently apply non-sustainable practices." "Prior to the 1970s, the traditional stakeholders had limited impact on the resources they used and ...

New winter hulless barley has high protein

...er hulless barley cultivar, "Doyce," in 2003. The breeding program is developing both traditional soft red winter wheat cultivars and new cultivars with unique and high-value end-use characteristics such as higher protein content, quality, and white seed color. The Virginia Tech wheat cultivars "Tribute" and...

WHO Warns Of Increased Risk Of Vector-borne Diseases In Tsunami-affected Areas

...volve the community to clean up the Aedes mosquito breeding sites in the open water containers and debris arou...water collects, to prevent the formation of dengue breeding sites. In India, a number of anti-vector measures are being implemented, including the strengthenin...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...r than New Jersey. "Elephants live in matriarchal breeding herds made up of mothers, aunts and their offsprin...O'Connell-Rodwell recorded the dramatic cries of a breeding herd threatened by lions at Mushara waterhole. "The elephants got really scared, and the matriarch m...

Red delicious, Northern Spy apples have most antioxidants, chemists find

...activity in apples. The findings could lead to the breeding of hybrid apples that pack a heftier antioxidant punch. The report appears in the June 29 issue of the American Chemical Society’s peer-reviewed Journal of Agricultural and Food Chemistry. ACS is the world’s largest scientific society. Researchers ...

Butterfly migration could be largest known

...ng, they migrate north in search of fresh food and breeding grounds, powered by a supply of yellow fat they have built up over the winter. Painted ladies migrate every year, but usually less conspicuously and in far fewer numbers. This year, however, exceptionally high winter rainfall in southern California ...

15 generations of untrained jocks, couch potatoes show big physiological adaptations

...in rats continue to diverge with further selective breeding for endurance running." Richard A. Howlett, Univer...n, UCSD, 936.3/A489. "15 generations of selective breeding for endurance running capacity in rats is associated with enhanced lung structure and function not s...

Discovery of an American salamander where it shouldn't be: Korea

...th respect to nocturnal organisms that do not have breeding congregations, where they don't come together en masse ever in their lives." He noted that numerous plants and animals in Asia and eastern North America share an evolutionary connection, suggesting some past geographic link between Asia and North Am...

Wild grasses and man-made wheats advance research capabilities

...esent challenges, he said. Progress in traditional breeding has been slow due to limited genetic variability for these traits. Two projects growing in the Texas Agricultural Experiment Station greenhouses in Vernon and Bushland are designed to increase the genetic variability. These projects are being funded...

Multi-species genome comparison sheds new light on evolutionary processes, cancer mutations

...es for the isolation of mammals into more distinct breeding groups, speeding the development of species-specific chromosomes. "This study has revealed many hidden secrets on the nature and timing of genome evolution in mammals, and it demonstrates how the study of basic evolutionary processes can lead to new...

Penguin chicks exposed to human visitors experience spike in stress hormone

Newly hatched magellanic penguin chicks in breeding grounds with a large number of human visitors show a significant spike in levels of a stress-related hormone compared to chicks hatched in areas not visited by humans, a University of Washington research team has found. It wasn't until chicks with l...

Mayan stingless bee keeping: Going, going, gone?

...poniculture as a way of life, but also to build up breeding stock to be re-introduced into the wild where bees play an important role as pollinators," Roubik explains. But beekeeping is fast becoming a global monoculture. Africanized honey bees produce more honey, and therefore are an economically attractive...

Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

...hers studying the Cape Vera colony of about 10,000 breeding pairs of birds called northern fulmars. The fulmars nest on the high cliffs, which are ringed by a series of freshwater ponds at their base. Although environmental monitoring in High Arctic locations is often very difficult due to logistical difficul...

Research suggests fitness of Florida panthers improved by limited breeding with Texas animals

...recently counted 87 as a result of a controversial breeding effort to improve the genetic health of the endangered and inbred animals, according to a new assessment. Hybrid kittens born to panthers brought into the area from Texas have "about a three times higher chance of becoming adults as do purebred ones...

Vineyard weeds found to host Pierce's disease of grapes

...ive on the weeds. Perennials and known feeding and breeding hosts of the glassy-winged sharpshooter were teste...de sprays or habitat modification to remove insect breeding host plants. Our study reinforces the need for weed control in irrigation ditches and roadsides adja...

Helping in a selfish world

...n cichlid fish that live in groups with a dominant breeding pair and non-breeding helpers. All individuals (helpers and breeders) co-operate to defend the young and the territory. The researchers combined behavioural observations with genetic analyses of relatedness in these fish groups and found that under s...

From a Few Wild Ancestors, a Citrus Cornucopia

...d. The others were either known to be crosses from breeding programs or mutations from a parent tree -- so the...ropagated true-to-type through grafting, selective breeding efforts encouraging desirable qualities—like sweetness—have been very successful. But breeding for c...

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