Most Popular Posts
Categories
- Biodiversity (45)
- Climate change (137)
- Community-based conservation (45)
- Economics and conservation (113)
- Endangered species (185)
- Fresh water (41)
- Habitat (158)
- Invasive species (76)
- Marine (103)
- Monitoring (198)
- Restoration (133)
- Socio-political issues (148)
- Tools and technology (91)
Archives
- June 2010
- May 2010
- April 2010
- March 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- April 2009
- January 2009
- August 2008
- July 2008
- June 2008
- May 2008
- April 2008
- March 2008
- February 2008
- January 2008
- December 2007
- November 2007
- October 2007
- September 2007
- August 2007
- July 2007
- June 2007
- May 2007
- April 2007
- March 2007
- February 2007
- January 2007
Sep
15
2009
Killer whale declines may be driven by changes in salmon populations
Order viagra over the counter, As top predators, killer whales exert a strong influence on the rest of the food web. Buy viagra online without prescription, But now scientists have shown in Biology Letters that it can work the other way around: changes in a single prey species can cause killer whale populations to ebb and flow as well.
Killer whales can eat a wide variety of animals, but individual populations may focus on a narrow set of prey, price of viagra. Comprar viagra baratos, The authors studied 25 years of data from two killer whale populations off the coasts of British Columbia and Washington State, which typically eat Chinook salmon, Kansas KS Kans. . Viagra no prescription, The whales’ numbers grew from 1974 until the mid-1990s, then suddenly started dropping, buy cheap viagra. Acheter viagra, The two populations declined by 17 percent and 8 percent through 2001, when they began to recover.
The whales’ mortality rates corresponded closely to changes in Chinook salmon populations, acheter viagra discount, Viagra en ligne afin, which followed similar fluctuations in the mid-1990s and early 2000s, the researchers report, buy viagra cod. They speculate that the whales depended so heavily on Chinook salmon that they became more prone to sickness and death when the fish declined, order viagra over the counter. Jotta viagra verkossa, Other killer whales that specialize in certain prey species may also have trouble switching to alternate food sources if that prey disappears, they say, Wyoming WY Wyo. . Cheapest viagra prices, – Roberta Kwok
Source: Ford, J., ordering viagra without prescription, Koop korting viagra, Ellis, G., viagra sale, Cheap viagra without prescription, Olesiuk, P., Minnesota MN Minn. , Cheap viagra no rx, & Balcomb, K, comprar viagra. Osta viagra, (2009). Linking killer whale survival and prey abundance: food limitation in the oceans' apex predator, cheapest viagra in the world. Buy viagra without prescription, Biology Letters DOI: 10.1098/rsbl.2009.0468
Image © sethakan, iStockPhoto.com
, ordering viagra. Order viagra without prescription.
Similar posts: Order viagra free samples no prescription. Propecia over the counter. Sildenafil citrate free samples. Order soma no prescription. Order soma online cheap. Viagra pedido en línea.
Trackbacks from: Order viagra over the counter. Order viagra over the counter. Order viagra over the counter. Order viagra over the counter. Order viagra over the counter. Order viagra over the counter.
Filed Under Marine |
Email This Post
Did the number of whales in that part of the ocean decline because they died… or because they moved? When you can’t find your dog in your house, does that mean that it died, or maybe that it moved outside?
Hi Paul,
Thanks for your question. According to the paper, the whales were tracked based on photo-identification from natural markings. The authors say that these whales live in “stable societies… from which individuals rarely, if ever, disperse.”
Roberta