Feeding Behavior of Free-Ranging King Penguins (Aptenodytes Patagonicus)

Ecology ◽  
1994 ◽  
Vol 75 (2) ◽  
pp. 489-497 ◽  
Author(s):  
Klemens Putz ◽  
Charles A. Bost
Keyword(s):  
Feeding Behavior ◽  
Aptenodytes Patagonicus ◽  
Free Ranging

A healthy, premoult adult king penguin (Aptenodytes patagonicus) with a markedly twisted beak

Polar Record ◽  
2017 ◽  
Vol 53 (6) ◽  
pp. 631-632
Author(s):  
Alexandre Corbeau ◽  
Charles-André Bost
Keyword(s):  
Body Condition ◽  
King Penguin ◽  
Air Breathing ◽  
Aptenodytes Patagonicus ◽  
Feeding Efficiency ◽  
Good Body Condition ◽  
Feeding Methods ◽  
Free Ranging

In seabirds, diet and feeding methods are related to the species morphology (Croxall, Evans, & Schreiber, 1984). Species that feed on living, mobile resources rely on a fully operational beak to efficiently seize, kill and swallow their prey. This is particularly important to diving species, such as penguins, that are highly time constrained when searching for prey at depth—as air-breathing predators, penguins must maximise their feeding efficiency during their deep foraging dives (Wilson & Wilson, 1990). This is why the observation of free-ranging penguins with physical abnormalities in good body condition is so rare. Here we report a highly unusual observation of a premoult adult king penguin (Aptenodytes patagonicus Miller) in good body condition with a highly anomalous beak.

scholarly journals Ultraviolet Beak Spots in King and Emperor Penguins

The Condor ◽  
2005 ◽  
Vol 107 (1) ◽  
pp. 144-150 ◽  
Author(s):  
Pierre Jouventin ◽  
Paul M. Nolan ◽  
Jonas Örnborg ◽  
F. Stephen Dobson
Keyword(s):  
Sexual Maturity ◽  
Aptenodytes Patagonicus ◽  
Lower Beak ◽  
Emperor Penguins ◽  
La Mancha ◽  
Uv Reflectance ◽  
Free Ranging ◽  
Orange Color

Abstract In seabirds, colors of feathers and external tissues have only recently been studied, and ultraviolet (UV) color has not yet been detected. Using live individuals as well as museum skins, we found UV peaks of reflectance in two large Aptenodytes species, King (A. patagonicus) and Emperor (A. forsteri) Penguins. UV reflectance did not occur on the feathers, claws, or skin of these species, nor did we find UV reflectance in five other genera of penguins (11 species). UV peaks overlapped with spots of color on the lower beak that appeared orange for human observers, and beak spots differed slightly in location between the two species. Adults of both sexes possessed these UV markings, but they were lacking in juveniles, as was the orange color of the beak spot, and auricular patches used for selecting mates. Finally, measurements of free-ranging King Penguins showed that recently paired birds had higher UV reflectance than courting ones, suggesting possible roles of UV beak spots in pairing and as an indicator of sexual maturity. Manchas Ultravioleta en el Pico de los Pingüinos Aptenodytes patagonicus y A. forsteri Resumen. En las aves marinas, los colores de las plumas y los tejidos externos sólo han sido estudiados recientemente, y el color ultravioleta (UV) todavía no se ha detectado. En individuos vivos así como en pieles de museo, nosotros encontramos picos de reflectancia UV en dos especies de pingüinos, Aptenodytes patagonicus y A. forsteri. El color UV no se encontró en las plumas, las garras o la piel de estas especies, ni encontramos color UV en otros cinco géneros de pingüinos (11 especies). Los puntos UV se encontraban superpuestos con manchas de color ubicadas en la parte baja del pico que parecían anaranjadas para los observadores humanos. Las manchas del pico difirieron levemente en forma y localización entre las dos especies. Los adultos de ambos sexos presentaron las manchas UV, pero éstas no estaban presentes en los juveniles, al igual que el color anaranjado de la mancha del pico y los parches auriculares empleados en la selección de parejas. Medidas tomadas en individuos libres de la especie A. patagonicus demostraron que los que se habían apareado recientemente tenían presentaban reflectancias de UV mayores que las de aquellos que aún estaban cortejando, lo que sugiere un posible papel de las manchas UV del pico en el apareamiento y como indicadoras de la madurez sexual.

scholarly journals Feeding Behavior in Free-Ranging, Large African Carnivores

1996 ◽  
Vol 77 (1) ◽  
pp. 240-254 ◽  
Author(s):  
B. Van Valkenburgh
Keyword(s):  
Feeding Behavior ◽  
Free Ranging

scholarly journals Population-level laterality in foraging finless porpoises

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Masao Amano ◽  
Yudai Kawano ◽  
Taketo Kubo ◽  
Tsuyoshi Kuwahara ◽  
Hayao Kobayashi
Keyword(s):  
Social Behavior ◽  
Feeding Behavior ◽  
Cerebral Hemisphere ◽  
Population Level ◽  
Unmanned Aerial System ◽  
Turning Behavior ◽  
Prey Recognition ◽  
Behavioral Laterality ◽  
The Right ◽  
Free Ranging

AbstractLaterality has been reported in many vertebrates, and asymmetrical cerebral hemisphere function has been hypothesized to cause a left-bias in social behavior and a right-bias in feeding behavior. In this paper, we provide the first report of behavioral laterality in free-ranging finless porpoises, which seems to support the aforementioned hypothesis. We observed the turning behavior of finless porpoises in Omura Bay, Japan, using land-based and unmanned aerial system observations. We found a strong tendency in finless porpoises to turn counterclockwise with their right side down when pursuing and catching fish at the surface of the water. Our results suggest that this population of finless porpoises shows consistent right-biased laterality. Right-biased laterality has been observed in various foraging cetaceans and is usually explained by the dominance of the right eye-left cerebral hemisphere in prey recognition; however, right-biased laterality in foraging cetaceans may have multiple causes.

scholarly journals Population-Level Laterality In Foraging Finless Porpoises

2021 ◽  
Author(s):  
Masao Amano ◽  
Yudai Kawano ◽  
Taketo Kubo ◽  
Tsuyoshi Kuwahara ◽  
Hayao Kobayashi
Keyword(s):  
Social Behavior ◽  
Feeding Behavior ◽  
Cerebral Hemisphere ◽  
Population Level ◽  
Unmanned Aerial System ◽  
Turning Behavior ◽  
Prey Recognition ◽  
Behavioral Laterality ◽  
The Right ◽  
Free Ranging

Abstract Laterality has been reported in many vertebrates, and asymmetrical cerebral hemisphere function has been hypothesized to cause a left-bias in social behavior and a right-bias in feeding behavior. In this paper, we provide the first report of behavioral laterality in free-ranging finless porpoises, which seemingly supports the aforementioned hypothesis. We observed the turning behavior of finless porpoises in Omura Bay, Japan, using land-based and unmanned aerial system observations. We found a strong tendency in finless porpoises to turn counterclockwise with their right side down when pursuing and catching fish at the surface of the water. Our results suggest that this population of finless porpoises shows consistent right-biased laterality. Right-biased laterality has been observed in various foraging cetaceans and is usually explained by the dominance of the right eye-left cerebral hemisphere in prey recognition; however, right-biased laterality in foraging cetaceans may have multiple causes.

Feeding Behavior, Aggression, and the Conservation Biology of Flamingos: Integrating Studies of Captive and Free-ranging Birds

1993 ◽  
Vol 33 (2) ◽  
pp. 117-125 ◽  
Author(s):  
KEITH L. BILDSTEIN ◽  
CATHERINE B. GOLDEN ◽  
BARBARA J. MCCRAITH ◽  
BRUCE W. BOHMKE
Keyword(s):  
Feeding Behavior ◽  
Conservation Biology ◽  
Free Ranging
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