Winter migration of rockhopper penguins (Eudyptes c. chrysocome) breeding in the Southwest Atlantic: is utilisation of different foraging areas reflected in opposing population trends?

Pütz, Klemens; Rey, Andrea Raya; Schiavini, Adrián; Clausen, Andrea P.; Lüthi, Bernhard H.

doi:10.1007/s00300-006-0110-0

Cited by 42 publications

(33 citation statements)

References 25 publications

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“…Therefore, we assume that the externally attached devices were not detrimental per se to the penguins and have not essentially altered the birds' behavior. This is further substantiated by studies on the winter dispersal of Magellanic Penguins (Spheniscus magellanicus, Pütz et al 2000) and SRP (Pütz et al 2002(Pütz et al , 2006a, where also no device effects were apparent over much longer attachment periods.…”

Section: Technical Features Of the Devices Usedmentioning

confidence: 78%

Plasticity in the foraging behavior of male Southern Rockhopper Penguins (Eudyptes chrysocome) during incubation in the Falkland/Malvinas Islands

Pütz¹,

Harris

Ratcliffe

et al. 2018

Polar Biol

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Environmental changes often affect the persistence of species or populations at different spatial and temporal scales. Thus, species must either adapt to these changes or experience negative impacts at the individual or population levels. Southern Rockhopper Penguins Eudyptes chrysocome are distributed throughout the Southern Ocean and have experienced substantial declines in the past which were linked to various anthropogenic and environmental factors. The aim of this study was to investigate the foraging behavior of male Southern Rockhopper Penguins at Berkeley Sound, East Falkland, Falkland/ Malvinas Islands, during incubation, a period at-sea which is crucial for replenishing body condition between two extended fasting periods ashore. Thus, birds are forced to forage efficiently during that time to balance their energy demands. We linked their at-sea distribution and foraging behavior to satellite-derived sea surface temperatures and temperature-depth profiles which were recorded by devices attached to the birds. While Southern Rockhopper Penguins usually travel several hundreds of km out into the open sea on multiple-day trips during incubation, we found in our study that most birds foraged close inshore, less than 9 km away from their colony, and regularly returned to their breeding site. We propose that this behavior occurred in response to the close proximity of the 8 °C SST isotherm and the vertical stratification of the waters therein. Also, while usually feeding pelagically in open waters, there are strong indications that Southern Rockhopper Penguins performed benthic or, at least, near-bottom dives to catch their prey during these short trips. The consequences of this behavioral plasticity in response to variations in sea temperatures and inferred prey availability are discussed, especially with regard to predicted global climate change.

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Section: Technical Features Of the Devices Usedmentioning

confidence: 78%

Plasticity in the foraging behavior of male Southern Rockhopper Penguins (Eudyptes chrysocome) during incubation in the Falkland/Malvinas Islands

Pütz¹,

Harris

Ratcliffe

et al. 2018

Polar Biol

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“…For the last two decades, population, diet, foraging range and colony breeding success have been investigated at a number of sites across the Falkland Islands (e.g. Strange 1982;Lamey 1993;Pütz et al 2001Pütz et al , 2002Pütz et al , 2003bPütz et al , 2006Clausen and Pütz 2002;Boersma et al 2002;Huin 2005). However, its general breeding biology in the Falkland Islands has not been studied in any detail and/or over multiple years and yet it is critical to have a comprehensive understanding of the biology of the species in order to develop appropriate conservation measures.…”

Section: Introductionmentioning

confidence: 99%

Aspects of the breeding biology of the southern rockhopper penguin Eudyptes c. chrysocome and new consideration on the intrinsic capacity of the A-egg

et al. 2008

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The rockhopper penguins Eudyptes chrysocome have recently been split into the northern E. moseleyi and the southern E. chrysocome rockhopper penguin. It is therefore crucial to have a comprehensive understanding of the biology of each species in order to develop appropriate conservation measures. We investigated the breeding biology of the southern rockhopper on New Island, in the western part of the Falklands Islands, by following the breeding attempt of 160 pairs during the 2006/2007 season and examining the eVect of lay time and colony habitat on breeding success. SpeciWcally, we compared survival and growth parameters between A-and B-eggs and chicks from non-manipulated and artiWcially manipulated nests to investigate why southern rockhopper penguins in the Falkland Islands are more able to Xedge an A-egg (Wrst laid) than conspeciWcs elsewhere. Breeding was highly synchronous, with no signiWcant diVerence in the breeding success between early and late breeders or between pairs breeding in diVerent habitats. We demonstrate for the Wrst time that the A-egg produced by the southern rockhopper penguin has, when alone, the same theoretical intrinsic potential to lead to a Xedged chick as the B-egg. In contrast, the hatching success and survival of the B-chick was similar when alone or in a two-egg clutch.

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“…In addition, such prey is also utilized by other marine predators which impose limitations on the foraging success of individuals, influencing the viability of fidelity to foraging grounds. Despite this heterogeneity in resource distributions, long distance migrations to and from specific foraging grounds are not uncommon (Stewart & DeLong 1995, Block et al 2001, Pütz et al 2006) and many seabird and pinniped species exhibit foraging site fidelity (e.g. Bradshaw et al 2004, Chilvers 2008, Lowther et al 2012, Augé et al 2014, Baylis et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Cross-seasonal foraging site fidelity of subantarctic fur seals: implications for marine conservation areas

Wege¹,

Tosh²,

Bruyn³

et al. 2016

Mar. Ecol. Prog. Ser.

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Marine top-predators show fidelity to foraging areas with predictable high-quality food patches.Areas of predictable prey yield are of conservation importance and telemetry data aid in identifying such areas. This study examined colony specific and intra-individual foraging site fidelity of lactating Subantarctic fur seals (Arctocephalus tropicalis) from Marion Island (46°54"S, 37°45"E) during summer and winter, comparing commitment to foraging areas across seasons. Thirty-one females were tracked in 2009-2013 resulting in 111 foraging trips for analyses. Inter-annually, preferred foraging areas in summer were consistently ≈200 km due east of Marion Island towards the Gallieni Rise. Summer individuals' core utilization areas overlapped by an estimated 32.84% (CI: 24.53% -41.94%). Seals responded to a decrease in regional productivity in winter by foraging in more distant alternative areas. In winter, individuals changed their travelling direction to north-east of Marion Island and foraged further afield, around the Del Caño Rise and along the South-west Indian Ridge. Despite preferring some foraging areas in winter, there was a low amount of overlap 6.03% (CI 4.02% -9.16%) of individual core utilization areas. The foraging grounds identified in this study have not been included in prior conservation assessments and are important in conserving for this globally 1 significant, and currently declining, population of Subantarctic fur seals and perhaps other toppredators breeding at Marion Island as well. Differences between winter and summer preferred foraging areas highlight the importance of sampling during different seasons when using telemetry data for the identification of potential pelagic conservation areas.

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Winter migration of rockhopper penguins (Eudyptes c. chrysocome) breeding in the Southwest Atlantic: is utilisation of different foraging areas reflected in opposing population trends?

Cited by 42 publications

References 25 publications

Plasticity in the foraging behavior of male Southern Rockhopper Penguins (Eudyptes chrysocome) during incubation in the Falkland/Malvinas Islands

Plasticity in the foraging behavior of male Southern Rockhopper Penguins (Eudyptes chrysocome) during incubation in the Falkland/Malvinas Islands

Aspects of the breeding biology of the southern rockhopper penguin Eudyptes c. chrysocome and new consideration on the intrinsic capacity of the A-egg

Cross-seasonal foraging site fidelity of subantarctic fur seals: implications for marine conservation areas

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