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Apr
20
2010
Overzealous Australians may be mistakenly killing native frogs
Buy propecia cod, Australia has declared all-out war on the invasive cane toad, and some environmentally-conscious citizens will go so far as to hit toads on purpose with their cars. Rabatt kaufen propecia, Such well-meaning activities could result in native frogs getting incorrectly identified as toads and killed by “friendly fire,” according to a study in Biological Conservation.
To determine whether the public could tell the difference between cane toads (Bufo marinus) and other amphibians, cheap propecia, Cheapest propecia online, researchers quizzed 1,328 people in Darwin, goedkope propecia apotheek, Online propecia, Australia. The team presented each person with cane toads and various species of native frogs held in glass enclosures, order propecia no rx, Acquistare a buon mercato propecia, along with photographs of eggs and tadpoles.
People thought that native frogs were toads in 17 percent of cases, and vice versa in 25 percent of cases, pharmacy propecia. Acheter propecia discount, Not surprisingly, respondents misidentified eggs and tadpoles more frequently than adult animals, billige propecia apotek. New Jersey NJ N.J. , A survey of wildlife agencies and community organizations also revealed that 36 native frog species had been submitted by people who thought the animals were cane toads.
Identification error rates went down to 10 to 15 percent if the person had taken a class about toads or participated in a “toad-busting” group, the team found, cheap propecia overnight delivery. And organized toad-eradication missions generally don’t allow members to kill amphibians indiscriminately, buy propecia cod. Lowest price propecia, But citizens with “personal vendettas against cane toads” are still cause for concern, the authors say, buy propecia no rx. Order propecia online legally, – Roberta Kwok
Source: Somaweera, R., North Dakota ND , Buy propecia overnight delivery, Somaweera, N., ostaa halvalla propecia, φτηνές φαρμακείο propecia, & R. Shine, Mississippi MS Miss. . Massachusetts MA Mass. , 2010. Frogs under friendly fire: How accurately can the general public recognize invasive species, propecia discount. Propecia for sale, Biological Conservation DOI: 10.1016/j.biocon.2010.03.027.
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Nov
11
2009
Expensive nature tourism isn’t necessarily better for local economies
Ordering viagra no rx, Just because a tourist spends more money at a nature destination doesn’t mean that the local community will receive more economic benefits, according to a study accepted for publication in Conservation Letters.
Nature tourism has been touted as a way to funnel money into locals’ pockets, thus encouraging the community to conserve its surroundings. One popular strategy is to attract a small number of high-paying tourists in order to bring in more money and avoid excessive environmental damage.
Researcher Chris Sandbrook at the University of Cambridge polled 161 tourists on their spending around Uganda’s Bwindi Impenetrable National Park, viagra sale, Billig kaufen viagra, which contains endangered mountain gorillas. He also estimated how much money ended up in the local community and how much went to non-local owners or suppliers.
The average tourist spent $265.30, goedkope viagra apotheek, Viagra generic, but only $56.95 was retained locally, Sandbrook found, viagra without prescription. Farmacia viagra baratos, And while the use of more expensive accommodations increased the total amount spent in the area, it didn’t affect the amount that stayed in the local economy, viagra pharmacy. Ordering viagra no rx, In other words, much of the money paid to high-end lodges ended up going to non-locals.
However, viagra farmacia a buon mercato, Alaska AK , longer stays did translate to more local benefits. Instead of focusing on “high-value, ordering viagra pills, New Mexico NM N.Mex. , low-volume” tourism, the study says, buy viagra cheap, Viagra online stores, it might be more effective to stretch out tourists’ visits. – Roberta Kwok
Source: Sandbrook, discount viagra, Halvalla viagra apteekki, C. (2009), Alabama AL Ala. . Købe viagra online, Local economic impact of different forms of nature-based tourism Conservation Letters Accepted Article DOI: 10.1111/j.1755-263X.2009.00085.x
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Oct
26
2009
Household changes can put major dent in carbon emissions
Viagra prescription, Simple household actions such as weatherizing homes and line-drying clothes could cut annual US carbon emissions by 7.4% within a decade, a reduction greater than France’s total emissions, researchers estimate in the Proceedings of the National Academy of Sciences.
Much of the effort to slow down climate change has been directed at complex cap-and-trade schemes or new technology that may not be ready for many years. Missouri MO Mo. , The authors decided to investigate the potential of short-term actions by US households, which are currently responsible for about 8% of the world’s carbon emissions.
The researchers calculated national emissions reductions from 17 possible household actions, purchase viagra online, Buy viagra no prescription, including upgrading appliances, adjusting laundry and thermostat settings, Maine ME Me. , αγοράσετε viagra έκπτωση, using fuel-efficient cars, and carpooling, buy viagra online. παραγγείλετε online viagra, They also estimated the percentage of people that would adopt these actions, based on the results of the most successful behavior-changing programs.
Effective programs used a combination of tools such as media campaigns, buy viagra without prescription, Buy viagra without prescription, financial incentives, and social networking, ordering viagra online without prescription, Acheter viagra discount, the authors write, while programs relying on only one approach tended to fail, comprare viagra. Minnesota MN Minn. , With the right interventions, annual household emissions could be cut by 20%, buy viagra from canada, Order viagra no rx, or 123 metric tons of carbon, in 10 years, Alaska AK , Utah UT , the team concluded.
While that goal might seem ambitious, the researchers say their estimates are conservative, Colorado CO Colo. . Billige viagra Apotheke, The study included only low-cost or high-return actions that could be performed with today’s technology and would not substantially alter the residents’ lifestyles. Upcoming technologies, costlier equipment additions, and more significant behavior changes have the potential to lower emissions even more, they say, viagra prescription. – Roberta Kwok
Source: Dietz, California CA Calif. , Viagra prescription, T., Gardner, bestill viagra online, Køb discount viagra, G., Gilligan, kjøpe viagra, Mississippi MS Miss. , J., Stern, P., & Vandenbergh, M. (2009). Household actions can provide a behavioral wedge to rapidly reduce U.S. carbon emissions Proceedings of the National Academy of Sciences DOI: 10.1073/pnas.0908738106
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Oct
11
2009
Community-owned forests store more carbon
Cheapest viagra, Forests that belong to local communities tend to provide higher carbon storage than government-owned forests, researchers report in the Proceedings of the National Academy of Sciences.
The team analyzed data on 80 forest commons from 10 countries in East Africa, Latin America, and South Asia. Forest commons that were larger or managed with greater local autonomy were more likely to be considered “sustainable, παραγγείλετε online viagra, Viagra generic, ” meaning that both carbon storage and livelihood benefits were high. Government-owned forests tended to be overharvested, Pennsylvania PA Penn. , Order viagra no rx, while community-owned forests generally showed fewer livelihood benefits and higher carbon storage.
This pattern may have emerged because local users conserve more resources when they own the forest, the authors argue, buy viagra no rx. Oregon OR Ore. , They say that communities could have even greater incentive to preserve their forests if they are compensated for extracting fewer products under the Reduced Emissions from Deforestation and Forest Degradation (REDD) initiatives, which currently target national governments, köpa rabatterade viagra. αγοράζουν online viagra, REDD payments, along with more local ownership of large forest patches, Rhode Island RI R.I. , Købe viagra, could help combat climate change without depriving communities of their livelihood, the team writes, viagra online stores. Buy viagra online without prescription, – Roberta Kwok
Source: Chhatre, A., Michigan MI Mich. , Kentucky KY Ky. , & Agrawal, A, Kaufen viagra. Hawaii HI , (2009). Trade-offs and synergies between carbon storage and livelihood benefits from forest commons Proceedings of the National Academy of Sciences DOI: 10.1073/pnas.0905308106
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Jul
21
2008
No-catch zones can protect coral reefs against attack from predatory starfish Acanthaster planci, according to a report published today in Current Biology. The aptly named crown of thorns starfish – a coral-munching nightmare of fearsome-looking spines – periodically reaches epidemic proportions in areas of the Great Barrier Reef with predictably devastating results. Hugh Sweatman's study shows how areas in which fishing is banned suffer much less frequent attacks, leaving the reef in better shape. It's not that predatory fish are directly keeping starfish numbers down, the Australian Institute of Marine Science biologist explains. Rather, the big fish are eating the little fish, stopping the little fish from eating the crustaceans that like nothing better than a tasty young starfish for supper. Aren't trophic cascades brilliant? Source: Sweatman H (2008) No-take reserves protect coral reefs from predatory starfish. Current Biology DOI: tba
Image: © Boris Tarasov
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Jul
3
2008
Farming tigers Panthera tigris to supply the demand for traditional Chinese medicines is not likely to safeguard their wild counterparts, according to a paper published in PLoS ONE this week. An international team of specialists, led by Save The Tiger Fund worker Brian Gratwicke, quizzed almost two thousand people in seven Chinese cities about their use of tiger-laced medicines, and the findings make grim reading. Nearly half of respondents admitted to using medicines claiming to use tiger parts, even though 93 percent agreed that a ban in the sale of tiger parts was necessary to save the world's biggest cats from oblivion. Source: Gratwicke B, Mills J, Dutton A, Gabriel G, Long B, Seidensicker J, Wright B, You W & Zhang L (2008) Attitudes towards consumption and conservation of tigers in China. PLoS ONE DOI: 10.1371/journal.pone.0002544
Image: © Jack Lamour
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Jun
26
2008
The world's largest network of no-take marine reserves is a success. Relieved readers of Current Biology this week can see how the controversial closing down to all fishing on more than a third of Australia's Great Barrier Reef Marine Park has allowed significant recovery of target species densities in just two years. A team of scientists led by Hugh Sweatman of the Australian Institute of Marine Science found that populations of coral trout (Plectropomus spp.) -- the main target for reef line fisheries -- within protected areas had bounced up by around two thirds compared with those where fishing was still allowed. Big, bold initiatives might not be popular with the people they affect most but, in this case at least, they work. Source: Russ GR, Cheal AJ, Dolman AM, Emslie MJ, Evans RD, Miller I, Sweatman H & Williamson DH (2008) Rapid increase in fish numbers follows creation of World's largest marine reserve network. Curr. Biol. DOI: tba
Image: © Timothey Kosachev
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Jun
18
2008
Can fisheries bycatch impacts be offset by making efforts to protect afflicted species elsewhere? Not according to a study published today in PLoS ONE, which claims that the “compensatory mitigation for marine bycatch” approach is a non-starter. A baker's dozen of international scientists, led by University of California Santa Cruz researcher Myra Finkelstein, found that diverting attention to other conservation measures – such as removing non-native predators from breeding grounds – could potentially spell disaster. The problem is that such an approach requires action for each individual bycatch species, thereby spreading conservation resources too thinly. The focus should remain on finding ways to reduce bycatch, Finkelstein's team concludes. Source: Finkelstein M, Bakker V, Doak DF, Sullivan B, Lewison R, Satterthwaite WH, McIntyre PB, Wolf S, Priddel D, Arnold JM, Henry RW, Sievert P & Croxall J (2008) Evaluating the potential effectiveness of compensatory mitigation strategies for marine bycatch. PLoS ONE DOI: 10.1371/journal.pone.0002480
Image: © Thomas Shortell
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Jun
12
2008
The Mediterranean sea is pretty much a big pond, so many European holiday makers would probably breathe a quiet sigh of relief to read in Conservation Biology that the number of big, fierce sharks swimming among them has plummeted in recent years. An international team, led by Dalhousie University's Francesco Ferretti, fearlessly waded through public and private archives, searching for evidence of population trends among the twenty largest species known to prowl the Med. In the five species for which there were sufficient data – a paucity all too telling of our scientific neglect of these top oceanic predators – precipitous declines were clear. Hammerhead sharks Sphyrna spp. were worst hit: none have been seen in coastal waters since 1963, and no records of the sharks anywhere in the Mediterranean exist after 1995. Nervous bathers should note that only the thresher shark Alopias vulpinus has been recorded in coastal waters in recent years. If looks like it is safe to be in the water after all. Just as long as you're not a shark. Source: Ferretti F, Myers RA, Serena F & Lotze HK (2008) Loss of large predatory sharks from the Mediterranean Sea. Cons. Biol. DOI: 10.1111/j.1523-1739.2008.00938.x
Image: © Bart Coenders
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Jun
4
2008
Mmmm, red snapper. But hang on, is that really what you're eating? A group of Stanford University scientists, led by Cheryl Logan, have used DNA forensics to uncover fishy goings on in the seafood marketplace. Taking 77 “Pacific red snapper” whole fish or fillets from a range of sources in California and Washington, including grocers, fish markets and sushi restaurants, they found a total of eleven species, only one of which was true red snapper Lutjanus campechanus. Between 60% and 63% of the samples were from fish not on the FDA Seafood list. Writing in Biological Conservation, Logan's team say that although around 80% of all fish landed are identified to species level, that picture changes somewhat by the time they reach our plates. This “institutionalized mislabeling” is preventing customers from making informed, conservation-minded choices about what fish to eat and what to avoid. Source: Logan CA, Alter SE, Haupt AJ, Tomalty K & Palumbi SR (2008) An impediment to consumer choice: overfished species are sold as Pacific red snapper. Biol. Conserv. DOI: 10.1016/j.biocon.2008.04.007
Image: © Jill Chen
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