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Maximum diving depths for feeding attained by Bulwer's petrels ( Bulweria bulwerii ) during the incubation period
Author(s) -
Mougin J.L.,
Mougin M.C.
Publication year - 2000
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.2000.tb00577.x
Subject(s) - biology , incubation , petrel , range (aeronautics) , period (music) , incubation period , puffinus , fishery , ecology , zoology , seabird , predation , biochemistry , materials science , physics , composite material , acoustics
All 20 of the Bulwer's petrels Bulweria bulwerii of Selvagem Grande (30°09′N, 15°52′W) equipped with maximum depth gauges had dived during the feeding trips performed during the incubation period, the mean maximum depth being 2.4 ± 1.0 m (range: 1.0–5.3 m). The depth reached showed no correlation with the breeding experience of the birds, with the length of their trip or with their body size and there were no differences between males and females. Thus, the Bulwer's petrel are among the numerous Procellariiformes which perform regular but comparatively shallow dives, unlike shearwaters ( Puffinus ) and diving petrels ( Pelecanoides ) which can reach depths of several tens of metres.