Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions

Table 1 Parameters of distribution and foraging of the five study species

Species	Diet	Distribution (breeding season)	Dive capacity	Distribution (moulting season)	Time of moult
Gentoo penguin	Variable, e.g. 40% fish, 60% lobster krill^b, or over 80% fish^c	Nearshore (30 km)^d	120 m^d	Unknown (suspected Falkland waters)	February–March^a
Magellanic penguin	40% fish, 30% squid, 30% lobster krill^b	Nearshore (40 km)^d	70 m^d	Unknown (suspected Falkland waters)	February–March^a
Rockhopper penguin	50% krill, 50% small squid^b	Nearshore (30 km)^d	50 m^d	Unknown (suspected Falkland/Patagonian Shelf waters)	February–March^a
Thin-billed prion	Amphipods, small squid^b,e	Offshore (500 km)^f	< 10 m^g	90% of population offshore Atlantic, around polar front, 10% over Patagonian shelf ^h	April–May
Wilson’s storm-petrel	Mainly krill, variable amounts of small fish and squid^g	Offshore (250 km)ⁱ	Surface feeding^g	Temperate to sub-tropical^g	April–May

^aOwn observation, References: ^bThompson [20], ^cHandley et al. [22], ^dMasello et al. [19], ^eQuillfeldt et al. [18], ^fQuillfeldt et al. [46], ^gBrooke [47], ^hQuillfeldt et al. [24], ⁱCroxall & Prince [48]

ISSN: 1472-6785