Foraging behaviour of satellite-tracked king penguins in relation to sea-surface temperatures obtained by satellite telemetry at Crozet Archipelago, a study during three austral summers

Guinet, Christophe; Koudil, Malik; Ca, Bost; Jp, Durbec; Jy, Georges; Mc, Mouchot; Jouventin, Pierre

doi:10.3354/meps150011

Cited by 79 publications

(58 citation statements)

References 8 publications

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“…During the incubation period, each parent alternately incubates the egg and restores its body reserves by foraging on marine resources. After hatching, the parental energy demand increases greatly since the chick must be provisioned regularly; this results in shorter trip durations [23,38]. The bounding box in figure 1a corresponds to the foraging range of adult king penguins during the summer breeding period.…”

Section: Methodsmentioning

confidence: 99%

Projected poleward shift of king penguins' ( Aptenodytes patagonicus ) foraging range at the Crozet Islands, southern Indian Ocean

2012

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Seabird populations of the Southern Ocean have been responding to climate change for the last three decades and demographic models suggest that projected warming will cause dramatic population changes over the next century. Shift in species distribution is likely to be one of the major possible adaptations to changing environmental conditions. Habitat models based on a unique long-term tracking dataset of king penguin ( Aptenodytes patagonicus ) breeding on the Crozet Islands (southern Indian Ocean) revealed that despite a significant influence of primary productivity and mesoscale activity, sea surface temperature consistently drove penguins' foraging distribution. According to climate models of the Intergovernmental Panel on Climate Change (IPCC), the projected warming of surface waters would lead to a gradual southward shift of the more profitable foraging zones, ranging from 25 km per decade for the B1 IPCC scenario to 40 km per decade for the A1B and A2 scenarios. As a consequence, distances travelled by incubating and brooding birds to reach optimal foraging zones associated with the polar front would double by 2100. Such a shift is far beyond the usual foraging range of king penguins breeding and would negatively affect the Crozet population on the long term, unless penguins develop alternative foraging strategies.

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Section: Methodsmentioning

confidence: 99%

Projected poleward shift of king penguins' ( Aptenodytes patagonicus ) foraging range at the Crozet Islands, southern Indian Ocean

2012

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“…Trip distance often varies across the breeding season, reflecting different constraints (Weimerskirch et al 1993, Guinet et al 1997, Beauplet et al 2004, Lescroël & Bost 2005, Phalan et al 2007). Older chicks have greater food needs and greater storage capacity than younger chicks (Walker & Boersma 2003) which may both require and allow adults to go farther to forage when chicks are older.…”

Section: Introductionmentioning

confidence: 99%

Foraging distance affects reproductive success in Magellanic penguins

Boersma¹,

Rebstock²

2009

Mar. Ecol. Prog. Ser.

101

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Foraging distance affects reproductive success and other demographic parameters in seabirds and pinnipeds. We tracked breeding Magellanic penguins Spheniscus magellanicus at Punta Tombo, Argentina using satellite transmitters from 1996 to 2006 (n = 148 males, 57 females) to investigate the variability in foraging distance and its effects on reproductive success. The time a penguin was away from its nest predicted the distance it swam during all stages of the breeding season (p < 0.005); this relationship was linear during incubation and nonlinear during chick rearing. During incubation, penguins went 1.0 km farther from the colony for every additional hour they were away from the nest, and the distance penguins traveled predicted the mean colony reproductive success. When chicks were > 30 d old, the probability of fledging 2 chicks was highest when penguins went less than 70 km from their nests. Penguins that went between 70 and 180 km from their nests were most likely to raise one chick, and the probability of losing both chicks increased with trip distance. Females and males made trips of similar distance. Foraging-trip distance varied within breeding season (p < 0.005). Penguins went farthest during incubation (411 ± 11.8 km), and stayed closest (61 ± 3.9 km) when chicks were < 30 d old, requiring parents to guard them. When chicks were older, adults traveled 111 ± 5.0 km. Mean foraging-trip distance varied among years (p < 0.005) by factors of 1.5 to 1.8, and trips by an individual penguin varied by a factor of 22.

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“…Weimerskirch et al 1993;Guinet et al 1997) and marine mammals (e.g. Bonadonna et al 2001;Matthiopoulos et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions

Bailleul

Charrassin²,

Monestiez

et al. 2007

Phil. Trans. R. Soc. B

122

115

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Southern elephant seals, Mirounga leonina, undertake large-scale oceanic movements to access favourable foraging areas. Successful foraging areas of elephant seals from the Kerguelen Islands are investigated here in relation to oceanographic parameters. Movements and diving activity of the seals as well as oceanographic data were collected through a new generation of satellite relayed devices measuring and transmitting locations, pressure, temperature and salinity. For the first time, we have associated foraging behaviour, determined by high increased sinuosity in tracks, and dive density (i.e. number of dives performed per kilometre covered), and changes in body condition, determined by variations in drift rate obtained from drift dives, to identify the oceanographic conditions of successful foraging zones for this species. Two main sectors, one close to the Antarctic continent and the other along the Polar Front (PF), where both foraging activity and body condition increase, seem to be of particular interest for the seals. Within these regions, some seals tended to focus their foraging activity on zones with particular temperature signatures. Along the Antarctic continent, some seals targeted colder waters on the sea bottom during benthic dives, while at the PF the favourable zones tended to be warmer. The possible negative effect of colder waters in Antarctic on the swimming performances of potential fish or squid prey could explain the behaviour of elephant seals in these zones, while warmer waters within the PF could correspond to the optimal conditions for potential myctophid prey of elephant seals.

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Foraging behaviour of satellite-tracked king penguins in relation to sea-surface temperatures obtained by satellite telemetry at Crozet Archipelago, a study during three austral summers

Cited by 79 publications

References 8 publications

Projected poleward shift of king penguins' ( Aptenodytes patagonicus ) foraging range at the Crozet Islands, southern Indian Ocean

Projected poleward shift of king penguins' ( Aptenodytes patagonicus ) foraging range at the Crozet Islands, southern Indian Ocean

Foraging distance affects reproductive success in Magellanic penguins

Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions

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