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首页> 外文期刊>Marine ecology progress series >Spatiotemporal associations between Pacific herring spawn and surf scoter spring migration: evaluating a 'silver wave' hypothesis
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Spatiotemporal associations between Pacific herring spawn and surf scoter spring migration: evaluating a 'silver wave' hypothesis

机译：太平洋鲱鱼产卵与冲浪滑行者春季迁移之间的时空关联：评估“银浪”假说

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摘要

Surf scoters Melanitta perspicillata are sea ducks that aggregate at spawning events of Pacific herring Clupea pallasi and forage on the eggs, which are deposited in abundance during spring at discrete sites. We evaluated whether migrating scoters followed a 'silver wave' of resource availability, analogous to the 'green wave' of high-quality foraging conditions that herbivorous waterfowl follow during spring migration. We confirmed that herring spawning activity began later in the year at higher latitudes, creating a northward-progressing wave of short-term localized food availability. Using satellite telemetry and aerial surveys, we documented the chronology of scoter spring migration and the use of stopover locations in relation to herring spawn timing and locations. We found that the migration chronology paralleled the northward progression of herring spawning events. Although there was considerable variability in the timing of both scoter migration and the initiation of herring spawning, the processes were related beyond a coincidental northward progression. During migration, 60% of the tracked scoters visited at least 1 spawn site, and those that used spawn sites were located on spawn sites for approximately one-third of their migration locations. Surf scoters showed close spatiotemporal associations with herring spawning events, confirming that the presence of herring spawn was a factor determining habitat use for many individuals. Surf scoters showed close spatiotemporal associations with herring spawning events, confirming that the presence of herring spawn was a factor determining habitat use for many individuals, a conclusion that is consistent with previous studies which used physiologically based metrics to evaluate the importance of herring spawn.
机译：冲浪者淡淡的Melanitta perspicillata是海鸭，聚集在太平洋鲱鱼Clupea pallasi和卵上觅食的产卵期，在春季离散地点大量沉积。我们评估了迁徙的苏格兰人是否遵循了“银浪”的资源可利用性，类似于草食水禽在春季迁徙时遵循的高质量觅食条件的“绿浪”。我们确认鲱鱼的产卵活动于今年晚些时候在较高的纬度开始，从而造成短期本地化粮食供应向北发展。通过卫星遥测和航空勘测，我们记录了滑行者春季迁移的时间顺序以及中途停留地点相对于鲱鱼产卵时间和地点的使用。我们发现迁移的时间顺序与鲱鱼产卵事件的北移平行。尽管在滑行迁移和鲱鱼产卵开始的时间上存在很大的差异，但是这些过程的关系超出了偶然的向北发展。在迁移过程中，有60％的被跟踪的苏格兰人至少访问了1个产卵场，而那些使用了产卵场的人则位于其产卵场中约三分之一的迁移地点。冲浪苏格兰人显示出与鲱鱼产卵事件密切的时空关联，证实鲱鱼卵的存在是决定许多人栖息地使用的一个因素。冲浪苏格兰人显示出与鲱鱼产卵事件密切的时空关联，证实了鲱鱼产卵的存在是决定许多人栖息地使用的因素，这一结论与以前的研究一致，该研究使用基于生理学的指标来评估鲱鱼产卵的重要性。

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  • 来源
    《Marine ecology progress series》 |2012年第21期|p.139-150|共12页
  • 作者

    Erika K. Lok; Daniel Esler; John Y. Takekawa; Susan W. De La Cruz; W. Sean Boyd; David R. Nysewander; Joseph R. Evenson; David H. Ward;

  • 作者单位

    Centre for Wildlife Ecology, Simon Fraser University, 5421 Robertson Road, Delta, British Columbia V4K 3N2, Canada, Environment Canada, Pacific and Yukon Region, 5421 Robertson Road, Delta, British Columbia V4K 3N2, Canada;

    Centre for Wildlife Ecology, Simon Fraser University, 5421 Robertson Road, Delta, British Columbia V4K 3N2, Canada;

    U.S. Geological Survey, Western Ecological Research Center, San Francisco Bay Estuary Field Station, 505 Azuar Drive, Vallejo, California 94592, USA;

    U.S. Geological Survey, Western Ecological Research Center, San Francisco Bay Estuary Field Station, 505 Azuar Drive, Vallejo, California 94592, USA;

    Environment Canada, Pacific and Yukon Region, 5421 Robertson Road, Delta, British Columbia V4K 3N2, Canada;

    Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington 98501, USA;

    Washington Department of Fish and Wildlife, 600 Capitol Way North, Olympia, Washington 98501, USA;

    U.S. Geological Survey, Alaska Science Center, 4210 University Dr., Anchorage, Alaska 99508, USA;

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  • 正文语种 eng
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  • 关键词

    habitat use; herring spawn; melanitta perspicillata; migration; satellite telemetry; surf scoter;

    机译：栖息地利用;鲱鱼产卵melanitta perspicillata;移民;卫星遥测;冲浪滑行者;

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