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Hornbills display a unique breeding habit in which the female seals herself into the nest cavity prior to egg laying and remains ensconced for most of the breeding cycle. This habit necessitates long-term sperm storage, which considerably lengthens the fertile period of the female. This in turn increases the amount of time available to females to engage in extrapair copulations. Because food delivered...
In 1994, an experimental longline fishery for hake Merluccius spp. commenced in the shelf waters off South Africa. Participants were required to record any birds caught, and these data were supplemented by ship-based observers on several vessels. Longlines are set at night, and the white-chinned petrel Procellaria aequinoctialis was the only seabird species caught while attempting to scavenge bait...
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