Geology and Hydrocarbon Potential of the Ross Sea, Antarctica

Structural Framework and Hydrocarbon Potential of Ross Sea, Antarctica: ABSTRACT

AAPG Bulletin ◽

10.1306/948870a0-1704-11d7-8645000102c1865d ◽

1987 ◽

Vol 71 ◽

Author(s):

Alan K. Cooper, Frederick J. Davey

Keyword(s):

Ross Sea ◽

Hydrocarbon Potential ◽

Structural Framework

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Inter-individual differences in the foraging behavior of breeding Adélie penguins are driven by individual quality and sex

Marine Ecology Progress Series ◽

10.3354/meps13208 ◽

2020 ◽

Vol 636 ◽

pp. 189-205

Author(s):

A Lescroël ◽

PO’B Lyver ◽

D Jongsomjit ◽

S Veloz ◽

KM Dugger ◽

...

Keyword(s):

Individual Differences ◽

Foraging Behavior ◽

Ross Sea ◽

Individual Quality ◽

High Quality ◽

Breeding Experience ◽

Age Related ◽

Demographic Traits ◽

Iteroparous Species ◽

Adélie Penguins

Inter-individual differences in demographic traits of iteroparous species can arise through learning and maturation, as well as from permanent differences in individual ‘quality’ and sex-specific constraints. As the ability to acquire energy determines the resources an individual can allocate to reproduction and self-maintenance, foraging behavior is a key trait to study to better understand the mechanisms underlying these differences. So far, most seabird studies have focused on the effect of maturation and learning processes on foraging performance, while only a few have included measures of individual quality. Here, we investigated the effects of age, breeding experience, sex, and individual breeding quality on the foraging behavior and location of 83 known-age Adélie penguins at Cape Bird, Ross Sea, Antarctica. Over a 2 yr period, we showed that (1) high-quality birds dived deeper than lower quality ones, apparently catching a higher number of prey per dive and targeting different foraging locations; (2) females performed longer foraging trips and a higher number of dives compared to males; (3) there were no significant age-related differences in foraging behavior; and (4) breeding experience had a weak influence on foraging behavior. We suggest that high-quality individuals have higher physiological ability, enabling them to dive deeper and forage more effectively. Further inquiry should focus on determining the physiological differences among penguins of different quality.

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