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

Kurtenbach: Pat McCaw’s contract stalemate makes no sense (for him)

first_imgOAKLAND — Patrick McCaw did not show up to work at the Warriors’ practice facility Tuesday.And no one knows if he’s going to show up on Wednesday, or if he’s going to travel with the team when they head to Seattle for Friday’s preseason game against the Kings.Truth be told, no one knows if McCaw will ever play for the Warriors again.It’s a situation is downright weird — a rarity around the Warriors’ organization these days. And there’s not much rhyme or reason to be found for why …last_img

No break for Huelgas, Mangrobang with their eyes set on Tokyo 2020

first_imgSEA Games in Calabarzon safe, secure – Solcom chief PH triathletes dominate SEA Games tilt in impressive showing UPLB exempted from SEA Games class suspension Catriona Gray spends Thanksgiving by preparing meals for people with illnesses LATEST STORIES READ: PH bets also snatch gold, silver in women’s triathlonMangrobang, who is training in Portugal under coach Sergio Santos, is expected to fly back to her Rio Maiaor training camp.FEATURED STORIESSPORTSWATCH: Drones light up sky in final leg of SEA Games torch runSPORTSSEA Games: Philippines picks up 1st win in men’s water poloSPORTSMalditas save PH from shutoutNikko Huelgas. CONTRIBUTED PHOTO/SEA GAMES POOLHuelgas is training under his Australian coach Brett Sutton.Both of them, according to Triathlon Association of the Philippines, have already been identified by team experts to have the best physical and psychological attributes to qualify for the Olympics. LOOK: Venues for 2019 SEA Games View comments Read Next Trending Articles PLAY LIST 00:50Trending Articles02:42PH underwater hockey team aims to make waves in SEA Games03:07PH billiards team upbeat about gold medal chances in SEA Games01:37Protesters burn down Iran consulate in Najaf01:47Panelo casts doubts on Robredo’s drug war ‘discoveries’01:29Police teams find crossbows, bows in HK university01:35Panelo suggests discounted SEA Games tickets for students02:49Robredo: True leaders perform well despite having ‘uninspiring’ bosscenter_img WATCH: Streetboys show off slick dance moves in Vhong Navarro’s wedding MOST READ Brace for potentially devastating typhoon approaching PH – NDRRMC Women’s triathlon gold medalist Kim Mangrobang. CONTRIBUTED PHOTO/SEA GAMES POOLKUALA LUMPUR — No rest for newly crowned triathlon royalties Nikko Huelgas and Marion Kim Mangrobang.After ruling the Southeast Asian Games competitions, they are expected to resume their training in hopes of qualifying for the Tokyo 2020 Olympics.ADVERTISEMENT Don’t miss out on the latest news and information. SEA Games: PH’s Alisson Perticheto tops ice skating short program READ: Mangrobang can finally get good night’s sleep They will be entered in World Cup in Doha and another big tournament in Hong Kong by year end to gather as many world ranking points as possible.Mangrobang is now ranked 157th in the world, the highest for a Filipino, but is expected to rise further.“Our next big stop is the Asian Games,” said Trap secretary general Tom Carrasco.ADVERTISEMENT LIST: Class, gov’t work suspensions during 30th SEA Gameslast_img read more

10 months agoDONE DEAL: Sporting CP keeper Emiliano Viviano joins SPAL

first_imgTagsTransfersAbout the authorCarlos VolcanoShare the loveHave your say DONE DEAL: Sporting CP keeper Emiliano Viviano joins SPALby Carlos Volcano10 months agoSend to a friendShare the loveFormer Italy goalkeeper Emiliano Viviano has joined SPAL.Viviano has moved to SPAL on-loan to the end of the season from Sporting CP.The 33-year-old only joined Sporting last summer after four years as Sampdoria’s No 1, along with Stefano Sturaro and Sinisa Mihajlovic.However, a change of board at Sporting has seen Viviano failing to make any appearances in the first half of 2018-19. last_img

19 days agoArsenal move to buy back PSV striker Donyell Malen

first_imgArsenal move to buy back PSV striker Donyell Malenby Paul Vegas19 days agoSend to a friendShare the loveArsenal are moving to buy back PSV Eindhoven striker Donyell Malen.Malen has been able to launch his senior career with PSV after a difficult spell inside Arsenal’s academy.The Holland international is on the radar of AC Milan, but Tuttosport says the Gunners are ready to make a bumper offer.The Londoners aim to wait until the summer before offering €56m for the striker.Malen, 20, has this season hit eight goals in eight league games. TagsTransfersAbout the authorPaul VegasShare the loveHave your saylast_img

Zidane not planning to rest players before the Liverpool game

first_imgReal Madrid will face Liverpool in the upcoming Champions League final game but Zinedine Zidane insisted that he won’t rest his players in the league games that are about to be played before this crucial match.The French coach claimed that of course, if the player won’t be 100% ready, he won’t play – but besides that, everyone who is fit is going to be included in the match squads as usual.The Real Madrid head coach spoke about his side’s upcoming weeks as he said, according to Liverpool Echo:“No, not at all. I’m not going to think about that.”“If that were the case, there’d be no point playing tomorrow or in our four or five remaining games.”divock origi, liverpoolReport: Origi cause Klopp injury concerns George Patchias – September 14, 2019 Divock Origi injury in today’s game against Newcastle is a cause for concern for Jurgen Klopp.Perhaps with one eye on Tuesday’s trip to Italy…“If a player isn’t at 100%, though, he won’t play. But as for the rest, they’ll play as always.”“We can’t think about that. We have to focus on the game and on playing with intensity.”“It’s true that this year because the title is already decided, there is less expectation, but that’s normal.”“Before the match, it’s like that, but when the game starts I don’t think that’ll be the case.”last_img read more

New Chelsea boss hails Chelsea new signing Jorginho as a wonderful

first_imgNew Chelsea boss Maurizio Sarri had worked with Jorginho at his former club Napoli and they are both now in Chelsea.After the Blues’ penalty shootout win against Inter Milan in the International Champions Cup in Nice on Saturday, Sarri has showered praises on Jorginho describing him as a “wonderful player”.Having played an impressive 90 minutes game which finished 1-1 after Pedro put the Blues ahead in the first half before Roberto Gagliardini equalised for Inter. Jorginho netted Chelsea’s first penalty which the Blues won 5-4.“For Jorginho, this is a normal match,” Sarri told the club’s website as quoted in Sky Sports.“He has technical ability but Jorginho also has a great mental speed, too. So for this way of football, I think Jorginho is a wonderful player.Maurizio Sarri, JuventusMaurizio Sarri satisfied despite Juventus’ draw at Fiorentina Andrew Smyth – September 14, 2019 Maurizio Sarri was satisfied with Juventus’ performance on Saturday afternoon after finishing a tough game at Fiorentina 0-0.“All over the pitch though we move the ball very quickly and we moved it well tonight, but not at the right speed.“You have to move the ball at a great speed on the floor. Otherwise, we risk to play for 90 minutes with 75 per cent ball possession but without scoring. That’s what we need to improve on.”Sarri added he was satisfied with his team’s performance.“So far I am satisfied. I am of course waiting for the other players from the World Cup to return, but the players gave me total availability.“I am satisfied and I saw in the match some things that we have tried in the training sessions. So far, so good!”last_img read more

Gareth Bales decision key to Pochettinos future

first_imgReal Madrid forward Gareth Bale could help determine the future of Tottenham Hotspur manager Mauricio Pochettino.The European champions have been tracking Pochettino for the best part of two years and are prepared to match United’s offer for the former Southampton boss. United are believed to be in the race for Pochettino after sacking Jose Mourinho last week. That means that Los Blancos must dig deep in the summer to stand any chance of winning the battle for the former Espanyol boss.Spurs are reportedly looking at least £45m in compensation and Pochettino is expected to get a massive pay rise at Old Trafford. Spurs have first option to buy back Bale on the cheap which could help the Spanish giants secure the services of Pochettino.Certainly, the idea of the Wales international returning to the club he left nearly half-a-decade ago would be a tempting one for Spurs chairman Daniel Levy.Re-signing the former PFA player of the year, even at a reduced price would be a statement of intent for the North London club for the upcoming season.Kieran trippier, Mauricio Pochettino, Tottenham HotspursTrippier and Pochettino try to clear up a war of words George Patchias – September 13, 2019 The apparent war of words between Kieran Trippier and Mauricio Pochettino is thought to be nothing more than a misunderstanding.Trippier was sold by Tottenham…At least, that’s the believe for former Tottenham Hotspur defender Terry Fenwick.He said, according to Daily Star:“The squad is fantastic already but I’m hoping Daniel and Mauricio get their heads together and bring in one or two world-class players.“If they don’t spend I think he will leave.”last_img read more