Salmon Syndrome M74: Cause Still A Mystery
...(thiamine). Butthere is no method for treating the threatened stocks of wild salmon. "It is most likely that M74 is caused by several interacting factors, which stemfrom ourinfluence on the Baltic ecosystem. These factors cause effects to be reinforcedand canlead to severe environmental problems. Such interacti...All Mixed Up: How Do Hybrids Fit Into The Picture?
...genetic stocks of rare species that arepotentially threatened by hybrid invasion. This and other evolutionary concernswill be addressed as ecologists begin to better understand the roles hybridsplay in ecosystems....Sustainable Harvest Of Caiman Falls Short Of Potential
...en sustainable harvest and conservation is further threatened bythe increase in crocodilian farming, which entails collecting eggs from captiveadults, says Thorbjarnarson in a companion commentary on the history of international tradein crocodilian skins. Another threat to crocodilian sustainable harvest progr...Increasing Carbon Dioxide Threatens Tropical Coral Reefs
...-10BOULDER--Tropical coral reefs could be directly threatened by thebuildup of atmospheric carbon dioxide (CO2) entering the oceans, andsome reefs may already be declining, say six scientists in a paperpublished in the April 2 issue of the journal Science. Writes leadauthor Joan Kleypas of the National Center f...Endangered Species' Recovery Plans Face Comprehensive Scientific Review
...l the more than900 species listed as endangered or threatened are recovering. Now a University of Washington zoo...he national symbol, the bald eagle, whichremains a threatened species in the lower 48 states. Since last fall, 20 teams of graduate students at 19 universities ha...Bruce Babbitt Calls For Linking Open Space And Conservation
...at-risk species. Whenthe gnatcatcher was listed as threatened in 1993, people from biologists to countysupervisors to economists to land-use planners worked together to decide whathabitat to save, what land to develop and how to pay for it all. The resulting series of Habitat Conservation Plans covers 210,000 a...Where the wild ones are: origins of staple crop found
...a spread or flour. Currently, the African crop is threatened by African cassava mosaic virus, which can reduce yields by 75 percent. Over the past decade, the virus has caused famines in several local regions of central Africa. The disease is prevalent because the African cassava varieties, having been intro...Horseshoe crab studies providing new insight into valuable ancient creatures
... adulthorseshoe crabs are a dietary staple for the threatened loggerhead turtle. Human Pressures Horseshoe crabs have long been important to humans as well. Theirrelatively simple biology has made them a popular organism for basicbiomedical research. Important early advances in understanding human visionand neu...USGS reports continued decline of California sea otters
... In 1977, the California sea otter was listed as threatened under the Endangered Species Act. Sea otters historically ranged across the North Pacific Ocean from about the mid-section of the Pacific coast of Baja California, Mexico, to northern Japan. By the end of the 19th century, maritim...Economic model to aid alligator farmers
...e alligator hide, Americanalligators are listed as threatened and all alligator products must bear a tagindicating that they are really alligator. The watch bands, shoes, boots, suitcases and wallets made from alligatorfor sale in upscale stores across the country could have come from farmedalligators ......the Mid-Atlantic, drinking watersupplies are being threatened in some areas as salty ocean water moves upstreaminto normally freshwater areas. "The drought is worsening and is beginning to spread," said USGS ChiefHydrologist Robert M. Hirsch. "With the recent lack of precipitation throughoutthe East, conditions...Drought brings environmental, ecological changes
...lem during the drought of 1995 when the salt front threatened the area's water supply system. Then, the USGS worked with the New York State Department of Health to coordinate releases from the Sacandaga Reservoir preventing further saltwater movement while minimizing effects on the reservoir. The Delaware Rive...Trouble for the world's turtles
...nd co-sponsor of the conference. "Turtles are threatened in the United States as well. About 55 species oft...ubsistence. Some50 percent of the total number of threatened turtles are at risk due to thistype of exploitation. The Southeast Asian trade is driven by a...Natural repellant in Spanish cedar leaves could help tropical forests
... not succeed already endangered primaryforests are threatened even further, the scientists note. "The four compounds we identified are new to science," said Philip C. Stevenson,Ph.D., natural product chemist at the Jodrell Laboratory of the Royal BotanicGardens and the Natural Resources Institute at the Univers...USGS releases assessment of nation's biological resources
...ic -- 19 percent of the freshwater fish speciesare threatened or endangered, and 73 percent of the freshwater mussels are atrisk. And in the Southwest, habitat loss due to dams, groundwater pumping andpollution have contributed to jeopardizing more than 48 percent of the region'sfish species." Groat called inva...USGS finds elevated levels of organochlorine pesticides in Aleutian bald eagles
... the contiguous United States being listed as threatened or endangered. The presence of DDE contamination, which lowers reproductive success because of eggshell thinning and embryo death, was associated with many of these declines. Since DDT was banned in the United States, populations ...Rainforest birds keep dying out long after logging stops
...ng is that without action, half of the world's 360 threatened forestbird species will be extinct in about 50 years. The encouraging conclusion isthat because the most-recently isolated fragments probably still have most oftheir species, conserving these fragments will mean saving the greatest numberof species....New Cosumnes River research partnership announced
...the Swainson's hawk, which is on the state list of threatened species, and geese, ducks, warblers and sandhill cranes reside in the floodplain forests, marshes and farm fields. In riverside forests, beavers harvest branches from tall cottonwood trees and scrub jays gather acorns from rare old groves of valley o...Peter H. Raven voted president-elect of AAAS
...is concentrated but scarcely known and is severely threatened by human activities. Raven came to the Missouri Botanical Garden in 1971, and since then the garden has grown to be one of the foremost botanical research institutions in the world. The Garden recently built a $19.6 million Monsanto Research Center ...Threatened Galapagos plants are focus of biologist's field guide
...ny plants native to these islands are tremendously threatened right now," McMullen said. "Someof them are found nowhere else in the world. To lose them because of interference by humans would be atragedy." McMullen, who first traveled to the Galàpagos in 1983 as a graduate student studying plantpollinat...