Study

Breeding success in the western gull × glaucous-winged gull complex: the influence of habitat and nest-site characteristics

  • Published source details Good T.P. (2002) Breeding success in the western gull × glaucous-winged gull complex: the influence of habitat and nest-site characteristics. The Condor, 104, 353-365.

Actions

This study is summarised as evidence for the following.

Action Category

Physically protect nests from predators using non-electric fencing

Action Link
Bird Conservation
  1. Physically protect nests from predators using non-electric fencing

    A randomised, controlled study in 1996 at one site on a sandbar in Washington State, USA (Good 2002) found that egg survival and hatching success of gull pairs in the western gull Larus occidentalis × glaucous-winged gull Larus glaucescens hybrid complex were significantly higher for nests with makeshift, 30 cm tall wooden exclusion fences (54% egg survival, 38% hatching success for ten pairs) than for control nests with no screening or ‘natural screening’ e.g. driftwood etc. (14% egg survival, 13% hatching success for 54 pairs). The fledging rate, however, was not significantly higher for protected nests (29% vs. 8% respectively) and the distribution of nests that failed to produce any fledglings did not differ from a uniform distribution across protected and control nests.

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