scholarly journals Effect of Instrument Attachment and Other Factors on Foraging Trip Duration and Nesting Success of Adélie Penguins

The Condor ◽  
2001 ◽  
Vol 103 (3) ◽  
pp. 481-490 ◽  
Author(s):  
Grant Ballard ◽  
David G. Ainley ◽  
Christine A. Ribic ◽  
Kerry R. Barton
Keyword(s):  
Radio Telemetry ◽  
Electronic Devices ◽  
Nesting Success ◽  
Trip Duration ◽  
Pygoscelis Adeliae ◽  
Pit Tags ◽  
Adélie Penguins

AbstractWe compared foraging-trip duration of Adélie Penguins (Pygoscelis adeliae) carrying various combinations of radio-telemetry transmitters, implanted, passively interrogated transponder (PIT) tags, and time-depth recorders at two widely separated colonies of different size on Ross Island, Antarctica, during three austral summers. Trip duration was measured by electronic devices rather than human observation. Instrumentation had no significant effect on foraging trip duration. Most of the variation in foraging trip duration was attributed to individual and year. Males' trips were significantly shorter than females' in a subset of known-sex birds. No effect was evident in nesting success even for birds that wore instruments for >20 days. We recommend use of small, hydrodynamically designed and placed instruments to researchers who wish to collect data unaffected by instrument attachment.Efectos de la Sujeción de Instrumentos y Otros Factores en la Duración de las Salidas de Forrajeo y el Éxito Reproductivo en Pygoscelis adeliaeResumen. Se comparó la duración de las salidas de búsqueda de alimento de Pygoscelis adeliae a los que se les colocaron distintas combinaciones de radiotransmisores, emisores implantados de interrogación pasiva y medidores de tiempo y profundidad de buceo. El estudio fue realizado durante tres veranos australes en dos colonias ampliamente separadas de diferente tamaño en Ross Island, Antártica. La duración de las salidas fue medida por instrumentos electrónicos en lugar de observaciones humanas. Los instrumentos no tuvieron un efecto significativo en la duración de las salidas de búsqueda de alimento. La mayor parte de la variación en la duración de las salidas fue atribuida a individuos y años. Las salidas de los machos fueron significativamente más cortas que las de las hembras en una sub-muestra de aves previamente sexadas. No se detectaron efectos evidentes en éxito de nidificación incluso en individuos que llevaron instrumentos por más de 20 días. Recomendamos el uso de instrumentos pequeños diseñados y colocados hidrodinámicamente a fin de no influenciar los datos colectados.

scholarly journals Coordination of Incubation Routines and Mate Choice in Adélie Penguins (Pygoscelis adeliae)

The Auk ◽  
1988 ◽  
Vol 105 (3) ◽  
pp. 428-432 ◽  
Author(s):  
Lloyd S. Davis
Keyword(s):  
Mate Choice ◽  
Trip Duration ◽  
Pygoscelis Adeliae ◽  
Mating Patterns ◽  
Breeding Seasons ◽  
Adélie Penguins

Abstract I studied the mating patterns and foraging-trip durations for a colony of Adélie Penguins (Pygoscelis adeliae) over two consecutive breeding seasons. Foraging-trip duration was not predicted by the time spent fasting before leaving the nest, but was consistent with the time remaining until hatching of the chicks. Consequently, foraging trips of pairs that successfully coordinated their incubation routine were complementary. The complementarity was due at least in part to the assortative effects of mate choice. Pairs that successfully coordinated the first three foraging trips remained together the next season; pairs that did not, separated. I argue that Adélie Penguins should retain their mates if partners are synchronous in their arrival at the rookery the next year and that, therefore, pairs unable to coordinate incubation must also be unlikely to coordinate their arrival at the rookery the next season.

Maintenance of nest quality in Adélie penguins Pygoscelis adeliae: an additional benefit to life in the center

Polar Biology ◽  
2021 ◽  
Author(s):  
Virginia Morandini ◽  
Katie M. Dugger ◽  
Amélie Lescroël ◽  
Annie E. Schmidt ◽  
Grant Ballard
Keyword(s):  
Additional Benefit ◽  
Pygoscelis Adeliae ◽  
Nest Quality ◽  
Adélie Penguins

Guidelines for people approaching breeding groups of Adélie penguins (Pygoscelis adeliae)

Polar Record ◽  
1998 ◽  
Vol 34 (191) ◽  
pp. 287-292 ◽  
Author(s):  
Melissa Giese
Keyword(s):  
Heart Rate ◽  
Natural Disturbances ◽  
Measurable Effect ◽  
Pygoscelis Adeliae ◽  
Heart Rates ◽  
Incubation Behaviour ◽  
Breeding Groups ◽  
Least Disturbance ◽  
South Polar ◽  
Adélie Penguins

AbstractIncreases in the number of people travelling to Antarctica has led to more frequent interactions between people and Antarctic wildlife, yet the effects of visitation on the animals has received limited scientific assessment. This study conducted experiments to measure the responses of incubating Adélie penguins (Pygoscelis adeliae) to controlled human approaches to determine which approach distances and approach styles caused the least disturbance to the birds. Three minimum approach distances were tested: 30, 15, and 5 m. Approaching penguins to 30 m had no measurable effect on either their behaviour or heart rate, while approaching as close as 15 m significantly elevated their heart rates above resting, undisturbed levels even though there was no behavioural indication of this response. Approaching penguins to 5 m significantly interrupted the penguins' incubation behaviour, with the potential to cause egg-cooling. Approaches to 5 m elevated heart rates above those measured when birds were undisturbed, approached to either 15 or 30 m, or exposed to ‘natural’ disturbances (that is, other penguins or south polar skuas, Catheracta maccormicki). The study also identified certain Adelie penguin behaviours that may be indicative of disturbance in response to human visitation. People visiting breeding penguins could learn to identify these behaviours, so they can monitor and modify any effects of their visit.

Predation of Adélie penguins (Pygoscelis adeliae) by leopard seals (Hydrurga leptonyx) in Prydz Bay, Antarctica

1995 ◽  
Vol 73 (5) ◽  
pp. 1001-1004 ◽  
Author(s):  
T. Rogers ◽  
M. M. Bryden
Keyword(s):  
Prydz Bay ◽  
Pygoscelis Adeliae ◽  
Hydrurga Leptonyx ◽  
Fast Ice ◽  
Ice Edge ◽  
Adélie Penguins

The behaviour of leopard seals, Hydrurga leptonyx, feeding on Adélie penguins, Pygoscelis adeliae, was investigated between November 1993 and January 1994 in Prydz Bay, Antarctica. The seals were distributed along the fast-ice edge in locations where departing penguins congregated. Five different hunting techniques were observed, four of which were used through most of the summer. Individual leopard seals favoured specific hunting techniques. Hitherto, penguin hunting was believed to be carried out primarily by a few male seals; in this study, however, the predation observed involved many different individuals of both sexes. It is estimated that six leopard seals feeding in this area over a period of 120 days would consume 2.7% of the adult penguin population.

scholarly journals To slide or stride: when should Adélie penguins (Pygoscelis adeliae) toboggan?

1991 ◽  
Vol 69 (1) ◽  
pp. 221-225 ◽  
Author(s):  
Rory P. Wilson ◽  
Boris Culik ◽  
Dieter Adelung ◽  
N. Ruben Coria ◽  
Hugo J. Spairani
Keyword(s):  
Energy Expenditure ◽  
Stride Length ◽  
Stride Frequency ◽  
Pygoscelis Adeliae ◽  
Additional Energy ◽  
High Incidence ◽  
The Coefficient Of Friction ◽  
Almost All ◽  
Leg Movements ◽  
Adélie Penguins

We noted whether Adélie penguins (Pygoscelis adeliae), when travelling over snow, walked or tobogganed according to gradient, snow friction, or snow penetrability. Both walking and tobogganing penguins reduced stride length and stride frequency, and thus speed, with increasing uphill gradient although tobogganing birds travelled faster and with fewer leg movements. The incidence of tobogganing increased with decreasing friction between penguin and snow. The percentage of penguins tobogganing was also highly positively correlated with increasing snow penetrability. Penguins walking on soft snow must expend additional energy to pull their feet through the snow, whereas tobogganing birds do not sink. It is to be expected that Adélie penguins would utilize the most energetically favourable form of travel which, under almost all conditions, appeared to be tobogganing. Although tobogganing appears to be energetically more efficient than walking, rubbing the feathers over snow increases the coefficient of friction in unpreeened plumage. We propose that a high incidence of tobogganing necessitates increased feather care and that the decision whether to walk or toboggan probably represents a balance between immediate energy expenditure and subsequent energy and time expended maintaining plumage condition.

Satellite telemetry of the winter migration of Adélie penguins ( Pygoscelis adeliae )

Polar Biology ◽  
1996 ◽  
Vol 16 (3) ◽  
pp. 221-225 ◽  
Author(s):  
L. S. Davis ◽  
P. Dee Boersma ◽  
Gordon S. Court
Keyword(s):  
Satellite Telemetry ◽  
Pygoscelis Adeliae ◽  
Adélie Penguins ◽  
Winter Migration

scholarly journals The Nesting Habits of Adélie Penguins (Pygoscelis Adeliæ)

Nature ◽  
1914 ◽  
Vol 93 (2337) ◽  
pp. 612-614
Author(s):  
G. MURRAY LEVICK
Keyword(s):  
Pygoscelis Adeliae ◽  
Nesting Habits ◽  
Adélie Penguins
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