Female and male Leach's Storm Petrels ( Hydrobates leucorhous ) pursue different foraging strategies during the incubation period.

Autor: Mauck RA; Biology Department, Kenyon College, Gambier, OH 42022., Pratte I; Canadian Wildlife Service, Environment and Climate Change Canada, 45 Alderney Drive, Dartmouth, B2Y 2N6, Canada., Hedd A; Wildlife Research Division, Environment and Climate Change Canada, Mount Pearl, NL, A1N 4T3, Canada., Pollet IL; Department of Biology, Acadia University, Wolfville, NS, B4P 2R6, Canada., Jones PL; Biology Department, Bowdoin College, Brunswick, ME 04011., Montevecchi WA; Biology Department, Bates College, Lewiston, ME 04240., Ronconi RA; Canadian Wildlife Service, Environment and Climate Change Canada, 45 Alderney Drive, Dartmouth, B2Y 2N6, Canada., Gjerdrum C; Canadian Wildlife Service, Environment and Climate Change Canada, 45 Alderney Drive, Dartmouth, B2Y 2N6, Canada., Adrianowyscz S; Biology Department, Kenyon College, Gambier, OH 42022., McMahon C; Biology Department, Kenyon College, Gambier, OH 42022., Acker H; Biology Department, Kenyon College, Gambier, OH 42022., Taylor LU; Biology Department, Bowdoin College, Brunswick, ME 04011., McMahon J; Biology Department, Kenyon College, Gambier, OH 42022., Dearborn DC; Biology Department, Bates College, Lewiston, ME 04240., Robertson GJ; Wildlife Research Division, Environment and Climate Change Canada, Mount Pearl, NL, A1N 4T3, Canada., McFarlane Tranquilla LA; Birds Canada, 43 Main Street, Sackville, NB, E4L 1G6, Canada.
Jazyk: angličtina
Zdroj: The Ibis [Ibis (Lond 1859)] 2023 Jan; Vol. 165 (1), pp. 161-178. Date of Electronic Publication: 2022 Jul 11.
DOI: 10.1111/ibi.13112
Abstrakt: Reproduction in procellariiform birds is characterized by a single egg clutch, slow development, a long breeding season and obligate biparental care. Female Leach's Storm Petrels Hydrobates leucorhous , nearly monomorphic members of this order, produce eggs that are between 20 and 25% of adult body weight. We tested whether female foraging behaviour differs from male foraging behaviour during the ~ 44-day incubation period across seven breeding colonies in the Northwest Atlantic. Over six breeding seasons, we used a combination of Global Positioning System and Global Location Sensor devices to measure characteristics of individual foraging trips during the incubation period. Females travelled significantly greater distances and went farther from the breeding colony than did males on individual foraging trips. For both sexes, the longer the foraging trip, the greater the distance. Independent of trip duration, females travelled farther, and spent a greater proportion of their foraging trips prospecting widely as defined by behavioural categories derived from a Hidden Markov Model. For both sexes, trip duration decreased with date. Sex differences in these foraging metrics were apparently not a consequence of morphological differences or spatial segregation. Our data are consistent with the idea that female foraging strategies differed from male foraging strategies during incubation in ways that would be expected if females were still compensating for egg formation.
Competing Interests: Conflicts of Interest: None.
Databáze: MEDLINE
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