Tag: "season" at biology news

Study Shows Songbirds Switch From Bugs To Berries To Fuel Fall Migration

...ly during migrationcompared to the summer breeding season in our forests and backyards where theiractions and needs are more familiar to us," said Parrish. "Their diet andhabitat use during migration are two examples of how they become more flexibleduring the migration period--and how our conservation tacti...

Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival

...earch teams camp, returns in July to close another season of data-gathering, and supervises the team through computer e-mail and satellite telephone. "The parents are tuckered out from the year before," Anderson said. "If the rest of our data show the same trend, then you would say that parents seem to max...

Colorado State Anthropologist Finds Fossil Treasures In Africa

...xpedition, which often proves difficult. The rainy season causes grasses to grow over the tracks and elephants scar theroad with footprints. Using a grant from the National Geographic Society, Waddle began making the trips to Bone Cave with anthropologists Callum Rossof SUNY Stoney Brook University and Bly...

Biogenic Emissions Higher Than Expected Over African Savanna

... basin. EXPRESSO gathered data during the dry season in November and December 1996 along a 800-kilometer (500-mile) band from the savannas of the Central African Republic in the north to the tropical rain forests of the Republic of Congo in the south. A French ARAT research aircraft measured winds, te...

New Report Sets Standard To Protect Natural Pest Control

With farmers planning for the 1998 planting season and an important science advisory panel on genetically engineered crops due to convene in two weeks, experts are voicing concern about the adequacy of the Environmental Protection Agency's current plansto forestall insect resistance to the natural to...

High Testosterone Level May Lead Male Junco To Stray From Mate

...t were givenextra testosterone during the breeding season were more likely than normalmales to fertilize fem...erone males and the normal malesended the breeding season with about the same number of genetic offspring.“However, the two groups of males got their off...

Plants Thrive With Insect-Induced Immune Responses

...provided by the caged caterpillars. As the growing season proceeded, all of the plants were colonized by the normalinsect pests, primarily earwigs, green peach aphids and flea beetles. Agrawal observed the following effects of these pests: Plants initially treated with the caged caterpillars receiv...

Concerns For Australian Sea Lion

...after an 18 month cycle, meaning that her pupping season occurs in alternate summers and winters, or in alternate springs and autumns. While calling for more scientific study of Australian sea lions to try to maximise their breeding potential, Dr Shaughnessy has welcomed the steady growth of NZ fur ...

Excavations In Prehistoric Chinese Cave Uncover Unusual Collections Of Large Mammals

...n Dadong Cave during the January and Februaryfield season this year. "There's a more intensive use of thebetter materials, so it's clear the Dadong people were makingchoices about the material that they used for their stone tools.When they could, they used the best material. That's a veryimportant point abo...

National Network Provides Update On Devastating Corn Disease

...ation with corn Monitor fields throughout growing season and harvest early if high amounts ofdisease develop during grain fill Consider preventative fungicides; the economic benefit of controlling thedisease with fungicides in grain production fields is marginal except in highrisk areas with significant y...

Ecological Consequences Of Jasmonate-Induced Responses For Plants In Native Populations

... and plants found after each successive growing season after a fire are smaller and attacked more frequen...the most abundant species during the first growing season after a fire but it rarely persists for more than three years after fires. Hence, by studying ...

CSIRO Reduces 'Cellulite' In Oranges

...ng on the tree. "Assessments by growers last season have shown a 20-25 per cent reduction in the number of fruit showing visible symptoms," says Dr Treeby. "We have reduced the problem, not eliminated it," he says. "While the spray has lessened the incidence of albedo breakdown, the cause rem...

Grassland Birds Are Not Nesting In Non-Native Grasses

... cool seasongrasses can be mowed earlier than warm season grasses, "before the first nestshave fledged." The researchers are also looking at whether insect populations differamong grass varieties. "A community of native plants support native insects. Theexotic grasses may not support the insects th...

USGS Contributions Enhance Public Health Research, Scientists Showcase Technologies At San Diego Meeting

From tracking the spread of winter flu season to pinpointing outbreaks of the Ebola virus, public health research frequently begins with a study of the geographic issues. Today, geographic and cartographic information systems, remote sensing satellites, and other technologies are providing U.S....

Scientists Hope To Learn How Long Trees Can Absorb High Levels Of CO2

...percent when the treeswere exposed for one growing season to carbon dioxide levels projected for50 years in the future, according to initial data gathered by scientistsfrom four institutions. While appearing to be good news about the ability of trees to absorbincreasing amounts of carbon dioxide from fossi...

Cardinals Can Recognize Gender By Song, Columbia University Biologist Finds

... intrigued that cardinalssing only during breeding season from early spring to midsummer, and reasonedthat, since the birds normally inhabit dense underbrush that hides them fromview, their songs might provide the cue that alerts a bird to the presence ofanother bird. She hid speakers in the brush a...

Out On A Limb: Young Burro Receives Artificial Leg At Colorado State

... extendedhousehold. They haul a sleigh during the season when, as the slender Lee putsit, "My beard gets whiter, my eyes crinkle and I gain 100 pounds." Lee, who notes that "I could have bought 30 burros for what I've spenton this baby so far," doesn't regret his decision. "Realistically, ...

York Researchers Identify 'Antifreeze' Protein In Carrots: Medical And Crop Protection Applications Expected

... may increase their frost tolerance andwiden their season or region of cultivation. Similarly there may be applicationsfor horticultural species that suffer from early frosts." The antifreeze protein discovered in this study is produced by a carrot plant:it is an example of a commercially important product ...

Four More Lemurs To Be Released Into Madagascar Jungle This Fall

...ly and August are winter months in Madagascar, the season of leastfruit in the forest," said Katz. "It may be that the wild individuals havelearned what other food sources are out there, such as leaves, that the releasedlemurs haven't yet identified." The researchers have adjusted some of their proc...

Boats A Source Of MTBE In Water

...ick to point out that once the Lake Donner boating season isover, the MTBE dissipates within weeks and there is no indication that itpersists between seasons. This is due to the fact that water temperatures inthe lake are stratified with warmer surface waters and cooler deeper waters,which keeps the MTBE n...

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