Effects of maternal foraging success and oceanographic variation on offspring behaviour and survival in the southern elephant seal

南象海豹母体觅食成功率和海洋学变化对后代行为和生存的影响

• 批准号: DP0342714
• 负责人: Prof Mark Hindell
• 金额: $ 2.4万
• 依托单位: University of Tasmania
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-02-10 至 2007-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0342714
• 关键词: Effects; maternal; foraging; success; oceanographic

Juvenile survival is the key determinant of mammalian population performance, but the proximate determinants of this have rarely been established in large, long-lived predators. Southern elephant seals, with their concentrated lactation effort and marked separation of energy acquisition (at-sea foraging) and expenditure (on-land lactation) provide an ideal model for investigating these factors. In this study, we investigate the partitioning of pre-partum performance (fat acquired in mothers) relative to spatial-temporal variation in ocean productivity and the effect of this expenditure on offspring condition and survival. Here, the final missing link of energy transfer and its effects on offspring will be a major outcome of this project.

少年生存是哺乳动物人口绩效的关键决定因素，但是很少在大型，长寿的捕食者中确定其近端决定因素。南部大象密封件以集中哺乳的努力以及能量采集的明显分离（AT-SEA觅食）和支出（陆上泌乳）为研究这些因素提供了理想的模型。在这项研究中，我们研究了在海洋生产力方面的空间变化以及这一支出对后代条件和生存的影响相对于时空变化的分配（母亲获得的脂肪）。在这里，能源转移的最终缺失链接及其对后代的影响将是该项目的主要结果。