Understanding the underlying ecological factors that affect the distribution patterns of organisms is vital for their conservation. Cephalopods such as giant warty squids Moroteuthopsis longimana are important in the diets of marine predators, including grey-headed albatrosses Thalassarche chrysostoma, yet our understanding of their habitat and trophic ecology remains limited. We investigated the habitat and trophic niche utilised by M. longimana through the δ13C and δ15N profiles captured in their beaks. M. longimana beaks were collected around grey-headed albatross nests at the Prince Edward Islands during 2004 and 2013 (n = 40 beaks). The results showed distinctly Antarctic distributions (δ13C = -24.0 ± 1.0‰, mean ± SD) for M. longimana, consistent with albatrosses foraging at the Southwest Indian Ridge, as opposed to broader foraging zones utilised by albatrosses from Îles Crozet and Îles Kerguelen. Slightly lower δ15N values (5.4 ± 0.7‰) were found compared to other islands in the Indian Sector of the Southern Ocean, which may indicate more crustaceans in the squid diets. Sequential sampling along the lateral walls of individual beaks (n = 4) revealed ontogenetic shifts in δ13C and δ15N values, but individual variation in these shifts requires further investigation.
Promoted ContentA Hurricane Can Be As Powerful As 10 Atomic Bombs5 Of The World’s Most Unique Theme ParksRevealed: 6 Hidden Secrets Of The Great Wall Of ChinaCelebrities Showing Support For George Floyd ProtestsPortuguese Street Artist Creates Hyper-Realistic 3D Graffiti8 Things To Expect If An Asteroid Hits Our PlanetTop 7 Best Car Manufacturers Of All Time8 Best 1980s High Tech Gadgets8 Superfoods For Growing Hair Back And Stimulating Its Growth5 Of The World’s Most Unique Theme ParksWhich Country Is The Most Romantic In The World?8 Shows You Didn’t Want To Watch At The End Loading… Reigning Masters champion Tiger Woods will miss next week’s US PGA Tour Players Championship with a back issue as the 15-time major winner’s return to defend his crown at Augusta National looms.Advertisement Woods, according to the tour website, told PGA commissioner Jay Monahan he would skip the signature event at TPC Sawgrass, which typically boasts one of golf’s strongest fields, just before agent Mark Steinberg announced his 44-year-old client still suffered back troubles.“Back just not ready,” Steinberg told Golf Digest and ESPN. “Not concerning long term, just not ready.”It’s the short term that is becoming of concern for Woods, who will miss the biggest Masters tuneup and have only three weeks of competition before chasing a sixth career green jacket – if he’s able to play by round one on April 9.“The idea is to peak around Augusta,” Woods told reporters last week in a conference call.Woods, ranked 11th, skipped this week’s Arnold Palmer Invitational with what Steinberg said was back stiffness. Woods also missed last week’s Honda Classic and the WGC Mexico Championship the week before that.The last time Woods played was in the Genesis Invitational at Riviera three weeks ago, when he placed 68th. His only other 2020 start came at Torrey Pines in January when he shared ninth.Woods would have the Valspar Championship on March 19-22 and the WGC Match Play in Austin, Texas, on March 25-29 as well as the Texas Open on April 2-5 before official Masters practice sessions begin, but he typically skips playing the week before the Masters.Woods won The Players Championship in 2001 and 2013, with only three-time winner Jack Nicklaus having captured more titles in the Ponte Vedra Beach, Florida, event.Woods has played a lighter schedule in recent seasons in the wake of multiple back surgeries, including a spinal fusion operation in 2017.He slowly worked his way back into form after that, including a runner-up effort at the 2018 PGA Championship and victory at the 2018 Tour Championship, setting the stage for his first major win in 11 years last April at Augusta National, completing an epic comeback saga.Woods won the Zozo Championship last October in Japan for his 82nd career US PGA title, matching Sam Snead atop the all-time tour win list. Read Also: NBA: James, Davis dominate as Lakers end playoff droughtHe then went on to finish fourth at the Hero World Challenge he hosts in the Bahamas before flying to Australia and serving as a playing captain in the US team’s victory over the Internationals at Melbourne.Woods is ranked seventh among American players, three spots behind where he would need to be in June to qualify for the Tokyo Olympics. Even with Dustin Johnson saying he will not compete in Japan, Woods would still need to pass two compatriots to grab a berth in the Olympics.FacebookTwitterWhatsAppEmail分享