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A Single-fly Assay for Foraging Behavior in Drosophila
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Cyclone avoidance behaviour by foraging seabirds.

Henri Weimerskirch1, Aurélien Prudor2

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Marine vertebrates face climate change challenges. Seabirds exhibit varied responses to cyclones, with adults navigating extreme winds at sea while juveniles stay near colonies, impacting foraging and survival.

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Area of Science:

  • Marine vertebrate ecology
  • Climate change impacts
  • Extreme weather events

Background:

  • Climate change is increasing extreme weather events like cyclones.
  • The effects of these events on marine vertebrate foraging are not well understood.
  • Tropical seabirds provide a model system to study responses to extreme wind conditions.

Purpose of the Study:

  • To investigate how tropical seabirds (red-footed boobies and great frigatebirds) respond to cyclones.
  • To determine if adult and juvenile birds can predict and adapt foraging behavior to extreme wind events.
  • To assess the risks and survival strategies of seabirds during cyclones.

Main Methods:

  • Observational study of seabird foraging behavior during multiple cyclone events.
  • Comparison of responses between adult and juvenile birds of two species.
  • Tracking of bird movements and altitude in relation to cyclone paths and wind intensity.

Main Results:

  • Juvenile birds and adult frigatebirds remained at colonies during gale-force winds, while adult boobies continued foraging.
  • Mortality of birds remaining on land was low.
  • Adult birds at sea successfully avoided cyclone centers, altering routes and using high altitudes (frigatebirds) to bypass storms.

Conclusions:

  • Seabird responses to cyclones vary by age and species, influencing survival and foraging.
  • Adult seabirds demonstrate adaptive strategies to mitigate risks from extreme weather at sea.
  • Increased cyclonic activity due to climate change may significantly impact seabird populations, potentially altering their distribution and foraging ranges.