scholarly journals Relationships between mercury burden, sex, and sexually selected feather ornaments in crested auklet (Aethia cristatella)

2020 ◽  
Vol 27 (14) ◽  
pp. 16640-16645
Author(s):  
Alexander L. Bond ◽  
Ian L. Jones
Keyword(s):  
Crested Auklet ◽  
Aethia Cristatella ◽  
Feather Ornaments

Glowing in the light: fluorescence of bill plates in the Crested Auklet (Aethia cristatella)

2017 ◽  
Vol 129 (1) ◽  
pp. 155-158 ◽  
Author(s):  
Christy N. Wails ◽  
Eva D. Gruber ◽  
Ethan Slattery ◽  
Lucy Smith ◽  
Heather L. Major
Keyword(s):  
Crested Auklet ◽  
Aethia Cristatella ◽  
Light Fluorescence

scholarly journals Male-Female Differences in Parental Care in Monogamous Crested Auklets

The Condor ◽  
2002 ◽  
Vol 104 (2) ◽  
pp. 413-423 ◽  
Author(s):  
Gail S. Fraser ◽  
Ian L. Jones ◽  
Fiona M. Hunter
Keyword(s):  
Parental Care ◽  
Radio Telemetry ◽  
Breeding Site ◽  
Food Samples ◽  
Crested Auklet ◽  
Aethia Cristatella ◽  
Prey Mass ◽  
Males And Females ◽  
Breeding Seasons ◽  
Young Chicks

Abstract We studied patterns of parental care in Crested Auklets (Aethia cristatella), a monogamous seabird, for three breeding seasons (1996–1998) in the Aleutian Islands, Alaska, using radio-telemetry. In 1996, we found no sexual differences in parental care, low breeding site attendance rates, and reduced occurrences of copepods in food samples delivered to chicks, suggesting that food availability may have been low. In 1997 and 1998, we found significant differences in parental care between males and females, particularly early in the chick-rearing period: males attended and brooded their single chick 75% and 90% longer than females, while females provisioned 33% and 36% more often than males, respectively. We also found significant differences between prey types delivered to chicks by males and females for these two years. Males brought in 30% more euphausiids, a relatively large pelagic crustacean, than females, whereas females brought in 36% more copepods, a smaller crustacean, than males; however, prey mass per load did not differ. In 1998, we experimentally measured how vulnerable unattended young chicks were using models placed in unoccupied crevices. Eighty-three percent of the models showed signs of attack, presumably by conspecific adults. We concluded that unattended Crested Auklet chicks are highly vulnerable to attack. We suggest that males took on a greater role in chick brooding than their mates because they have a larger and more strongly hooked bill and are more aggressive than females, and thus better equipped than females to guard young chicks or the crevice breeding site. Diferencias en el Cuidado Parental entre Machos y Hembras en la Especie Monógama Aethia cristatella Resumen. Utilizando radiotelemetría para estudiar los patrones de cuidado parental en Aethia cristatella, un ave marina monógama, durante tres períodos reproductivos (1996–1998) en las Islas Aleutianas, Alaska. En 1996 no encontramos diferencias sexuales en el cuidado parental, encontramos bajas tasas de presencia en el lugar de nidificación, y baja ocurrencia de copépodos en las muestras de alimento entregadas a los polluelos, lo cual sugiere que la disponibilidad de alimento podría haber sido baja. En 1997 y 1998 encontramos diferencias significativas en el cuidado parental entre hembras y machos, particularmente en el período temprano de cría de los polluelos. Los machos asistieron y empollaron su único polluelo por un período un 75% y 90% más largo que las hembras, mientras que las hembras aprovisionaron con una frecuencia un 33% y 36% mayor que los machos, respectivamente. También encontramos diferencias significativas entre el tipo de presa entregado por las hembras y por los machos durante los dos años. Los machos entregaron un 30% más de eufáusidos (crustáceos pelágico relativamente grandes) que las hembras, mientras que éstas entregaron un 36% más de copépodos (crustáceos más pequeños) que los machos. Sin embargo, el peso de la carga de alimento no varió. En 1998 medimos experimentalmente la vulnerabilidad de los polluelos no cuidados utilizando modelos situados en grietas desocupadas. El 83% de los modelos presentaron signos de ataques presumiblemente producidos por adultos coespecíficos. Concluimos que los polluelos no cuidados de A. cristatella son altamente vulnerables a ataques. Sugerimos que los machos tomaron un rol más importante en la crianza de los polluelos que sus parejas debido a que ellos presentan un pico más grande y fuertemente arqueado y son más agresivos que las hembras. Por lo tanto están mejor equipados que las hembras para proteger a los polluelos o proteger el sitio de nidificación.

The Crested Auklet, Aethia cristatella (Alcidae, Charadriiformes), does not vary geographically in genetics, morphology or vocalizations

2015 ◽  
Vol 162 (6) ◽  
pp. 1329-1342 ◽  
Author(s):  
Olesya S. Pshenichnikova ◽  
Anna V. Klenova ◽  
Pavel A. Sorokin ◽  
Victor A. Zubakin ◽  
Nikolay B. Konyukhov ◽  
...  
Keyword(s):  
Crested Auklet ◽  
Aethia Cristatella

scholarly journals Hexachlorocyclohexane and DDT in marine organisms from the Bering and the Okhotsk Seas

2014 ◽  
Vol 176 (1) ◽  
pp. 225-232
Author(s):  
Vasily Yu. Tsygankov ◽  
Margarita D. Boyarova ◽  
Olga N. Lukyanova ◽  
Nadezhda K. Khristoforova
Keyword(s):  
Marine Mammals ◽  
Chum Salmon ◽  
Pink Salmon ◽  
Oncorhynchus Keta ◽  
Toxic Substances ◽  
Crested Auklet ◽  
Odobenus Rosmarus Divergens ◽  
The North ◽  
Aethia Pusilla ◽  
Aethia Cristatella

Organochlorine pesticides (HCHs and DDT) are harmful and toxic substances affected biota. HCHs and DDT are still used as pesticides in the Southern Hemisphere and from there can reach the North Pacific due to atmospheric transfer. Isomers of HCH and DDT and their metabolites were detected in organs of some marine mammals ( Eschrichtius robustus, Odobenus rosmarus divergens ) from the Bering Sea; the maximum concentration was found in the walrus liver (90263 ng/g lipids). To trace these pollutants spreading in the Okhotsk Sea, the seabirds (Pacific gull Larus schistisagus, crested auklet Aethia cristatella, auklet crumb Aethia pusilla, northern fulmar Fulmarus glacialis, and grey petrel Oceanodroma furcata ) and fishes (pink salmon Oncorhynchus gorbusсha and chum salmon Oncorhynchus keta ) were sampled; the pesticides concentration in the birds tissues ranges from 29 ng/g lipids in plume of the fulmar to 16095 ng/g lipids in plume and skin of the auklet and in the salmons tissues - from 220-330 ng/g lipids for the pink salmon to 550-790 ng/g lipids for the chum salmon (both fish species were caught at Kuril Islands).

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