J. Croxall

Publications268
h-index83
Citations20,319
Highly Influential Citations1,368
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Seabird conservation status, threats and priority actions: a global assessment
TLDR
Overall, seabirds are more threatened than other comparable groups of birds and that their status has deteriorated faster over recent decades, while on land, alien invasive predators, habitat degradation and human disturbance are the main threats.
EFFECTS OF SATELLITE TRANSMITTERS ON ALBATROSSES AND PETRELS
TLDR
To minimize device effects, it is suggested that transmitter loads be reduced to a minimum, use of harnesses be avoided, and careful attention be given to limiting handling times during incubation when some species are particularly sensitive to disturbance.
The influence of parental relatedness on reproductive success
TLDR
Examination of three long–lived vertebrates, the long–finned pilot whale, the grey seal and the wandering albatross reveals significant negative relationships between parental similarity and genetic estimates of reproductive success, uncovering a selective pressure that favours not only inbreeding avoidance, but also the selection of maximally dissimilar mates.
Accuracy of geolocation estimates for flying seabirds
TLDR
The accuracy of GLS tags is more than adequate for tracking migration and breeding-season foraging ranges of pelagic species, and for identifying broad-scale habitat preferences, overlap and potential conflict with commercial fisheries.
Global relationships amongst black‐browed and grey‐headed albatrosses: analysis of population structure using mitochondrial DNA and microsatellites
TLDR
Genetic analyses support the current classification of T. impavida as being distinct from T. melanophris, but would also suggest splitting T.impavida into two groups: Falkland Islands, and Diego Ramirez/South Georgia/Kerguelen.
Contrasting population changes in sympatric penguin species in association with climate warming
Climate warming and associated sea ice reductions in Antarctica have modified habitat conditions for some species. These include the congeneric Adélie, chinstrap and gentoo penguins, which now…
Trans‐equatorial migration and mixing in the wintering areas of a pelagic seabird
Despite increasing interest in long-distance migration, the wintering areas, migration corridors, and population mix in winter quarters of most pelagic marine predators are unknown. Here, we present…
Diet, provisioning and productivity responses of marine predators to differences in availability of Antarctic krill
TLDR
The results show a coherent, though complex, pattern of within and between species similarities and differences that mainly reflect the degree of dependence on krill, the feasibility of taking alternative prey and constraints on trip duration and/or meal size imposed by foraging adaptations.
Year-round distribution of white-chinned petrels from South Georgia: Relationships with oceanography and fisheries
Feather mercury levels in seabirds at South Georgia: influence of trophic position, sex and age
We studied the mercury contamination of 13 species of seabirds breeding on Bird Island, South Georgia, in 1998. Total mercury concentrations in body feather samples of birds caught at their breeding…
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