APTN National NewsOTTAWA-It has faced protests on both sides of the border, and now the U.S. State Department has ordered a review of the $7 billion Keystone XL pipeline in a decision that could delay the project until after 2012 U.S. Presidential election.TransCanada has been working to build the 2,735 kilometre pipeline to move Alberta tar sands oil to the Gulf of Mexico since 2008. Native American and First Nations groups, along with environmentalists, have been campaigning to stop the project.Thousands have recently protested the pipeline at the White House and a sister protest on Parliament Hill ended with over 100 people arrested.The U.S. State Department wants TransCanada to study re-routing the pipeline around environmentally sensitive areas in Nebraska.U.S. President Barack Obama released a statement backing the U.S. State Department’s decision.“Because this permit decision could affect the health and safety of the American people as well as the environment, and because a number of concerns have been raised through a public process, we should take time to ensure that all questions are properly addressed and all potential impacts…properly understood,” said Obama in a statement.Prime Minister Stephen Harper said in statement released to the media that he was “disappointed” with the decision.“While we are disappointed with the delay, we remain hopefully the project will be decided on its merits and eventually approved,” Harper’s statement said.
The devil is in the detail: small-scale sexual segregation despite large-scale spatial overlap in the wandering albatross
Sexual segregation in foraging habitat occurs in many marine predators and is usually attributed to competitive exclusion, different parental roles of each sex or niche specialisation associated with sexual size dimorphism. However, relatively few studies have attempted to understand the patterns and underlying drivers of local-scale sexual segregation in marine predators. We studied habitat use, diet and feeding ecology of female and male wandering albatrosses Diomedea exulans, fitted with GPS and stomach-temperature loggers during the chick-rearing period (austral winter) at South Georgia in 2009. During this period, when oceanographic conditions were anomalous and prey availability was low in waters near the breeding colony, the tracked wandering albatrosses showed high consistency in their foraging areas at a large spatial scale, and both males and females targeted sub-Antarctic and subtropical waters. Despite consistency in large-scale habitat use, males and females showed different foraging behaviours in response to oceanographic conditions at a smaller scale. Males appeared to be more opportunistic, scavenging for offal or non-target fish discarded by fishing vessels in less productive, oceanic waters. They exhibited sinuous movements, feeding mostly on large prey and consuming similar amounts of food during the outbound and return parts of the foraging trip. In contrast, females targeted natural productivity hotspots, and fed on a wide variety of fish and cephalopods. They commuted directly to these areas; most prey were ingested on the outbound part of the trip, and they often started their return after ingesting large prey at the farthest point from the colony. Together, these results indicate that sexual segregation in core foraging areas of wandering albatrosses is driven by sex-specific habitat selection due to the low availability of prey in local Antarctic waters. This segregation results in different feeding behaviour at local scales which may be explained by differing breeding roles and degree of parental investment by each sex, with females investing more than males in reproduction. Further investigations are necessary to confirm the existence of this pattern through time under contrasting environmental conditions and to identify the drivers responsible for local-scale sexual segregation in wandering albatrosses.