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Food transit times in captive leopard seals (Hydrurga leptonyx)

机译:圈养豹海豹(Hydrurga leptonyx)的食物运输时间

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摘要

The passage rate of food through the alimentary tract of three captive, female leopard seals (Hydrurga leptonyx) was assessed. Seals were housed during winter in holding pools with access to water to reduce factors affecting digestion. Three different marker types were used; large and small beads and TiO_2. Animals were checked hourly, and sample collections continued for 270 h after dosing. Individual differences in transit and mean retention times were observed, possibly reflecting inter-digestive emptying times of the stomach and small intestine. Age differences and activity levels may also have been a factor. Leopard seals displayed extended food transit times similar to terrestrial carnivores instead of other pinnipeds. This result suggests an adaptation of digestive system to cope with the opportunistic diet and range of prey types consumed.
机译:评估了三只圈养雌性豹海豹(Hydrurga leptonyx)在食物中通过食物的速率。冬季,海豹被安置在蓄水池中,可以取水以减少影响消化的因素。使用了三种不同的标记类型:大,小珠和TiO_2。每小时检查动物一次,给药后继续收集样品270小时。观察到运输和平均保留时间的个体差异,这可能反映了胃和小肠的消化内排空时间。年龄差异和活动水平也可能是一个因素。豹海豹显示出更长的食物运输时间,类似于陆生食肉动物,而不是其他夹足动物。这一结果表明,消化系统的适应能力可以应付机会性饮食和消耗的猎物种类。

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  • 来源
    《Polar biology》 |2011年第1期|p.95-99|共5页
  • 作者单位

    Faculty of Veterinary Science, University of Sydney, J.D Stewart Building, Building B01, Sydney, NSW 2001, Australia,Australian Marine Mammal Research Centre, Zoological Parks Board NSW/Faculty of Veterinary Science, University of Sydney, P.O Box 20, Mosman, NSW 2088, Australia,School of Animal and Veterinary Science, Charles Start University, Wagga Wagga, NSW, Australia,Batchelor Institute of Indigenous Tertiary Education, Nhulunbuy, East Arnhem Land, NT 0881, Australia;

    Faculty of Veterinary Science, University of Sydney, J.D Stewart Building, Building B01, Sydney, NSW 2001, Australia,Australian Marine Mammal Research Centre, Zoological Parks Board NSW/Faculty of Veterinary Science, University of Sydney, P.O Box 20, Mosman, NSW 2088, Australia,School of Biological, Earth and Environmental Sciences, University of NSW, Sydney, NSW 2052, Australia;

    Faculty of Veterinary Science, University of Sydney, J.D Stewart Building, Building B01, Sydney, NSW 2001, Australia;

    Faculty of Veterinary Science, University of Sydney, J.D Stewart Building, Building B01, Sydney, NSW 2001, Australia,Australian Marine Mammal Research Centre, Zoological Parks Board NSW/Faculty of Veterinary Science, University of Sydney, P.O Box 20, Mosman, NSW 2088, Australia;

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  • 正文语种 eng
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  • 关键词

    beads; complex diet; extended; passage rate; poisson distribution; TiO_2;

    机译:珠子复杂的饮食;扩展通过率;泊松分布TiO_2;

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