Stable isotopes indicate sex-specific and long-term individual foraging specialisation in diving seabirds

first_imgAn important aspect of foraging ecology is the extent to which different individuals orgenders within a population exploit food resources in a different manner. For diving seabirds, muchof this information relates either to short-term dietary data or indirect measures such as time budgets.Moreover, dietary specialisation can be difficult to detect due to biases associated with conventionalsampling techniques. We used stable isotope ratios in blood and feathers to infer trophic and habitatspecialisations among 4 diving seabird taxa—the gentoo penguin Pygoscelis papua, the macaronipenguin Eudyptes chrysolophus, the South Georgian shag Phalacrocorax (atriceps) georgianus andthe Kerguelen shag P. (atriceps) verrucosus. This allowed us to investigate foraging specialisationand assess whether social dominance or differences in foraging preferences explained the observedpatterns. In all taxa where sexes were known we found that males foraged at a higher trophic level(δ15N values) than females, although this was not significant in macaroni penguins. We believe thatthis is linked to a dual foraging strategy among female macaroni penguins. For South Georgianshags, we found that sex-related dietary differences persisted for long periods (inferred from stableisotope analyses of feathers and blood). We suggest that the trophic differences are driven by differencesin physiological performance, with males tending to dive deeper than females because of theirlarger size, and hence able to access higher trophic level prey items. Moreover, male and femaleshags tend to forage at different times of day; therefore, social dominance by males is unlikely to bedriving the observed differences. We also recorded highly significant relationships between stableisotope signatures in blood (representing the breeding season diet) and those in feathers (mostly representingthe previous non-breeding season diet) in both the South Georgian and Kerguelen shags.This strongly suggests that these 2 taxa include individuals with distinct foraging specialisation (andmost probably foraging locations) that are maintained over long periods.last_img read more

Partridge and Brown win England’s top senior spots for 2015

first_img30 Oct 2015 Partridge and Brown win England’s top senior spots for 2015 Internationals Richard Partridge and Julie Brown have capped winning seasons by being named as England Golf’s top seniors for 2015.Partridge, the Irish and Scottish senior champion, and Brown, the British senior women’s champion, have each won their respective orders of merit.Brown, from Trentham in Staffordshire, scored a runaway win, amassing more than twice as many order of merit points as her closest rival, English senior amateur champion Helen Lowe.“I really wanted to win this, I was close last year and was pipped, so I’m very pleased,” she remarked.The highlight of her season was realising a long-held ambition to hold a British title. “That was really special,” said Brown. “I always wanted to win a British title and I lost in the final of the British amateur in 1984 at Troon. So this did mean a lot to me – even though I had to wait a long time for it.”She added: “I also really enjoyed playing in the England team this year – I don’t think I have ever laughed so much, we had so much fun as a team.” They also had much success, taking the silver medal at the European championships and winning the Senior Women’s Home Internationals.”In addition Brown was runner-up in the English senior amateur, which she won in 2014, and tied fifth in the English senior stroke play.She has just completed her second year as a senior and her target is to keep on winning. “My goal is to do the same again next year, if I can, if it’s possible. I definitely want to win another title.”Richard Partridge, from Wildernesse in Kent, described his order of merit win as: “The pinnacle of a superb and very satisfying personal season.“To beat one’s fellow competitors and to be constantly to the fore throughout the season against some impressive foe is extremely gratifying and something of which I am very proud and I will be hoping to continue next season.”It was, he said, “a great and unexpected thrill” to win the Irish title and then to follow it up by winning the Scottish.  He was also runner-up in the Welsh championship, although he says that was the one which got away, having held a four-shot lead with eight holes to play.Partridge returned to the England senior team after an absence of a year and described his selection for the European championship and the Senior Home Internationals as “both a great honour and experience.”Looking ahead, his priorities include trying to retain his titles and giving himself a chance of England team selection. He’d also like to regain the Kent senior title. “Consistent performance is the key to success and I will be doing my utmost to try and continue where this season has ended,” said Partridge.Leading final placingsSenior Women1 Julie Brown (Trentham) 1221872 Helen Lowe (Scraptoft) 549873 Lulu Housman (Wyke Green) 505704 Lindsey Shaw (Chevin) 477905 Caroline Berry (Bromborough) 415496 Sue Dye (Delamere Forest) 384217 Cath Rawthore (Sale) 248958 Aileen Greenfield (Pyecombe) 243009 Joanna Galway (Pyecombe) 1864910 Janet Melville (Royal Birkdale) 18170Senior Men1 Richard Partridge (Wildernesse) 873222 Ian Attoe (Worplesdon) 793203 Stephen East (Moortown) 594934 Alan Mew (Stoneham) 552715 Mark Stones (Boyce Hill) 507296 David Niven (Newbury & Crookham) 491597 Clive Jones (Golf de Toulouse Seilh) 400558 Keith Waters (West Byfleet) 372199 Andrew Atkinson (Windermere) 3447810 Chris Reynolds (Littlestone) 29184Images © Leaderboard Photographylast_img read more

May rink takes home top prize at Ladies Bonspiel

first_imgThe Kelli May rink of Nelson kept the hardware at home with a win in the A event of the Ladies Bonspiel Sunday at the Nelson Curling Club.The May rink, conisting of third Erin May, second Megan May and lead Jade May, combined family forces to capture the Snowpack A event title.Jill Winters, also of Nelson, won the B event title.The Winters rink includes third Marla Dreher, second Allison Sutherland and lead Marcie Stefiuk. The B event is sponsored bhy Whitewater Ski Resort.The Lisa Nevakshonoff rink of Castlegar took home the Sears Nelson C event crown.The rink includes third Ami Anderson, seond Joanne Fenner and lead Jen Geddes.The theme of the bonspiel was Give My Regards to Broadway.The teams came out in full force during Saturday’s constume banquet.last_img