Biogeography Of Procellariiform Foraging Strategies: Does Ocean Productivity Influence Provisioning?

By Cheryl L. Baduini, K. Hyrenbach. Marine Ornithology, 2003

87 citations recorded by the source corpus.

SUMMARY the shortest foraging trips and decreased with increasing trip length. Among bimodal species, delivery rates were significantly greater for short (mean = 9.8 % BM day-1) than for long foraging trips (mean = 2.6 % BM day -1). However, seabirds increased their effective delivery rates by alternating several short foraging trips for every long excursion. The resulting effective dual prey delivery rates, af ter combining short and long foraging trips, were undistinguishable from those for species with a unimodal foraging strategy. Additionally, we tested whether the use of a bimodal provisioning strategy was related to the spatial and temporal patterns of ocean productivity. We o bserved significantly greater chlorophyll a concentrations within the more distant foraging grounds (long trip destinations) targeted b y bimodal species. Conversely, we did not detect a difference in the variability of chlorophyll a concentrations within the two types of f oraging grounds, suggesting that ocean productivity is equally predictable within the areas targeted by long and short provisioning trips. Our r esults highlight the importance of ocean productivity patterns as determinants of marine bird foraging strategies and distributions during the b reeding season.

Subfields: Ecology, Global and Planetary Change, Oceanography

View Paper: https://www.semanticscholar.org/paper/930bc616cc8afa86ac82ff6e7e588fec3e366b3d

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Citations in the corpus

Sex-specific foraging strategies throughout the breeding season in a tropical, sexually monomorphic small petrel (2012, background): “Most of the evidence for dual foraging strategies comes from temperate or subtropical areas (Baduini & Hyrenbach 2003), which in part may reflect the fewer studies of foraging behaviour in tropical species, especially the small petrels.”
Dual-foraging of Cory’s shearwaters in the Azores: feeding locations, behaviour at sea and implications for food provisioning of chicks (2008, unknown): “Thus, foraging strategies of individual species of Procellariiformes may vary both spatially and temporally, presumably in relation to variation in the distribution and abundance of pelagic prey resources around different breeding sites (Baduini & Hyrenbach 2003, Congdon et al. 2005).”
Foraging plasticity in a pelagic seabird species along a marine productivity gradient (2010, background): “…in heterogeneous environments, adult petrels and shearwaters may alternate between long and short foraging trips (Chaurand & Weimerskirch 1994, Weimerskirch et al. 1994), a strategy allowing efficient food delivery to chicks without compromising their own requirements (Baduini & Hyrenbach 2003).”
Causes and consequences of individual variability and specialization in foraging and migration strategies of seabirds (2017, background): “…shearwaters and other petrels, but there is a great deal of variability among species and populations, potentially related to differences in foraging strategies and resource distribution around colonies or between years (Granadeiro et al. 1998, Baduini & Hyrenbach 2003, Phillips et al. 2009b).”