Diet of Bulwer's Petrel Bulweria bulwerii in the Madeiran Archipelago

Zonfrillo, Bernard

doi:10.1111/j.1474-919x.1986.tb02708.x

Cited by 14 publications

(8 citation statements)

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“…This is also in agreement with the indirect information provided by Bulwer's Petrel diet, as it is primarily composed of vertically migrating mesopelagic fish, cephalopods and crustaceans, which are characteristic of these marine habitats (Zonfrillo 1986, Neves, Nolf & Clarke 2011.…”

supporting

confidence: 89%

“…Reasons for this presumed decline include threats at the breeding grounds, particularly predation by introduced mammals and attraction to artificial lights (Madroño, González & Atienza 2004). Threats at sea could also play a role, but studies on the species' behaviour and ecology at sea are scarce (Mougin & Mougin 2000), with only isolated observations (van Oordt & Kruijt 1953, Bourne 1995, or indirect information such as dietary data (Zonfrillo 1986, Martín & Lorenzo 2001, Cheng, Spear & Ainley et al 2010.…”

mentioning

confidence: 99%

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Satellite tracking of Bulwer's PetrelsBulweria bulweriiin the Canary Islands

Rodríguez¹,

Bécares²,

Martínez³

et al. 2013

Bird Study

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supporting

confidence: 89%

mentioning

confidence: 99%

Satellite tracking of Bulwer's PetrelsBulweria bulweriiin the Canary Islands

Rodríguez¹,

Bécares²,

Martínez³

et al. 2013

Bird Study

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“…Previous diet studies based only on the prey item morphology, conducted on Selvagem Grande and other islands in the Northeast Atlantic, showed a similar specialization pattern where mesopelagic fish and squid were the most abundant prey of Bulwer’s petrel 36, 38 .…”

Section: Discussionmentioning

confidence: 76%

The diet of a nocturnal pelagic predator, the Bulwer’s petrel, across the lunar cycle

Waap

Symondson

Granadeiro

et al. 2017

Sci Rep

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The lunar cycle is believed to strongly influence the vertical distribution of many oceanic taxa, with implications for the foraging behaviour of nocturnal marine predators. Most studies to date testing lunar effects on foraging have focused on predator activity at-sea, with some birds and marine mammals demonstrating contrasting behavioural patterns, depending on the lunar-phase. However, to date no study has focused on how the lunar cycle might actually affect predator-prey interactions in the upper layers of the ocean. Here, we tested whether the diet of the predominantly nocturnal pelagic predator, the Bulwer’s petrel (Bulweria bulwerii) would change throughout the lunar cycle, using molecular analysis to augment detection and taxonomic resolution of prey collected from stomach-contents. We found no evidence of dietary shifts in species composition or diversity, with Bulwer’s petrel always consuming a wide range of mesopelagic species. Other co-variables potentially affecting light availability at-sea, such as percentage of cloud cover, did not confound our results. Moreover, many of the species found are thought not to reach the sea-surface. Our findings reveal that nocturnal predators are probably more specialized than previously assumed, irrespective of ambient-light, but also reveal deficiencies in our current understanding of species vertical distribution and predation-dynamics at-sea.

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“…Most adults arrive at the colony in late April, females lay a single egg in late May/early June, chicks hatch at the end of July and fledge in mid‐ to late September (Nunes & Vicente, ). During the breeding season, Bulwer's petrels are thought to be nocturnal feeders, specialized in exploiting mesopelagic prey that perform daily vertical migrations (from 200 to 1000 m depth), including fish, especially lanternfish, Myctophidae (Zonfrillo, ; Mougin & Mougin, ; Neves et al ., ).…”

Section: Methodsmentioning

confidence: 99%

Leapfrog migration and habitat preferences of a small oceanic seabird, Bulwer's petrel (Bulweria bulwerii)

Ramos

Sanz

Militão

et al. 2015

Journal of Biogeography

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Aim Our current understanding of migratory strategies and the reasons for their high 27 variability along the phylogenetic tree remains relatively poor. Most of the hypotheses 28 relating to migration have been formulated for terrestrial taxa; classically, oceanic migrations 29 were considered as merely dispersive due to the scarcity of observations in the open ocean. 30We describe for the first time, the migration strategy of a small seabird, the Bulwer's petrel 31 (Bulweria bulwerii), and provide new insights into the ecology and evolution of long-distance 32 marine migrations. 33 Location Subtropical and tropical Atlantic Ocean. 34Methods Using cutting-edge geolocators, we examined the year-round distribution and at-sea 35 activity patterns of adult Bulwer's petrels sampled at 5 localities throughout its breeding 36 range in the Atlantic: the Azores, Salvages, Canary and Cape Verde archipelagos. We 37 assessed the migratory connectivity of the species and its habitat use at population and meta-38 population scales. 39Results Our results provide the first evidence of an oriented leapfrog migration in oceanic 40 seabirds. Ecological niche models based on breeding-season data effectively predicted that 41 subtropical waters of the South Atlantic would be the preferred habitat for the northern 42 populations of Bulwer's petrels during the non-breeding season. Habitat modelling also 43 highlighted similarities in distributions between the breeding and non-breeding periods for the 44 southern populations. Data on at-sea activity patterns suggested that birds from the northern 45 and southern populations behave differently during the breeding season, as well as in the 46 northern and southern non-breeding ranges during the non-breeding period. 47Main conclusions These results indicate that specific habitat preferences, presumably related 48 to differences in prey availability, explain the observed distributions and hence the pattern of 49 leapfrog migration described for Bulwer's petrel. Our study demonstrates the utility of 50Page 3 integrating diverse tracking data from multiple populations across international boundaries, 51 and habitat modelling, for identifying important areas common to many marine species in the 52 vast oceanic environments. 53 54 Keywords: Activity patterns, Bulweria bulwerii, Bulwer's petrel, capture-mark-recapture, 55 geolocator data, habitat modelling, Macaronesian seabirds, meta-population studies, oceanic 56 migrations. 57Page 4 INTRODUCTION 58Migration is an integral part of the annual life-cycle and life-history of many animal species. 59

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Diet of Bulwer's Petrel Bulweria bulwerii in the Madeiran Archipelago

Cited by 14 publications

References 1 publication

Satellite tracking of Bulwer's PetrelsBulweria bulweriiin the Canary Islands

Satellite tracking of Bulwer's PetrelsBulweria bulweriiin the Canary Islands

The diet of a nocturnal pelagic predator, the Bulwer’s petrel, across the lunar cycle

Leapfrog migration and habitat preferences of a small oceanic seabird, Bulwer's petrel (Bulweria bulwerii)

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