Early development and differentiation of the Laysan albatross (Phoebastria immutabilis(Rothschild, 1893): Procellariiformes)

2016 ◽  
Vol 277 (9) ◽  
pp. 1231-1249 ◽  
Author(s):  
Susan J. Rehorek ◽  
Timothy D. Smith ◽  
Simon C. Beeching
Keyword(s):  
Early Development ◽  
Phoebastria Immutabilis ◽  
Development And Differentiation ◽  
Laysan Albatross

First record of Laysan Albatross (Phoebastria immutabilis) in Korea

2018 ◽  
Vol 25 (1) ◽  
pp. 19-22
Author(s):  
Jin-Won Yang ◽  
Seung-Gu Kang ◽  
Won-Ho Lee ◽  
Meong-Kyu Jeong
Keyword(s):  
First Record ◽  
Phoebastria Immutabilis ◽  
Laysan Albatross

Laysan Albatross (Phoebastria immutabilis)

2009 ◽  
Author(s):  
Jill A. Awkerman ◽  
David J. Anderson ◽  
G. Causey Whittow
Keyword(s):  
Phoebastria Immutabilis ◽  
Laysan Albatross

scholarly journals Successful same-sex pairing in Laysan albatross

2008 ◽  
Vol 4 (4) ◽  
pp. 323-325 ◽  
Author(s):  
Lindsay C Young ◽  
Brenda J Zaun ◽  
Eric A VanderWerf
Keyword(s):  
Sex Ratio ◽  
Kin Selection ◽  
Rare Occurrence ◽  
Same Sex ◽  
Animal Kingdom ◽  
Monogamous Species ◽  
The Social ◽  
Phoebastria Immutabilis ◽  
Laysan Albatross

Unrelated same-sex individuals pairing together and cooperating to raise offspring over many years is a rare occurrence in the animal kingdom. Cooperative breeding, in which animals help raise offspring that are not their own, is often attributed to kin selection when individuals are related, or altruism when individuals are unrelated. Here we document long-term pairing of unrelated female Laysan albatross ( Phoebastria immutabilis ) and show how cooperation may have arisen as a result of a skewed sex ratio in this species. Thirty-one per cent of Laysan albatross pairs on Oahu were female–female, and the overall sex ratio was 59% females as a result of female-biased immigration. Female–female pairs fledged fewer offspring than male–female pairs, but this was a better alternative than not breeding. In most female–female pairs that raised a chick in more than 1 year, at least one offspring was genetically related to each female, indicating that both females had opportunities to reproduce. These results demonstrate how changes in the sex ratio of a population can shift the social structure and cause cooperative behaviour to arise in a monogamous species, and they also underscore the importance of genetically sexing monomorphic species.

scholarly journals Nocturnal and Diurnal Foraging Activity of Hawaiian Albatrosses Detected With a New Immersion Monitor

The Condor ◽  
2000 ◽  
Vol 102 (3) ◽  
pp. 577-584
Author(s):  
Patricia Fernández ◽  
David J. Anderson
Keyword(s):  
Hawaiian Islands ◽  
Foraging Activity ◽  
Phoebastria Immutabilis ◽  
Nocturnal Foraging ◽  
Foraging Movements ◽  
Laysan Albatross

Abstract We used a new immersion monitor to study the foraging movements of two species of albatrosses that nest in the Hawaiian Islands. The monitors showed that breeding male Black-footed Albatrosses (Phoebastria nigripes) land on the water more frequently during the day than at night. Breeding male Laysan Albatross (Phoebastria immutabilis) behavior was more variable and also showed a diurnal bias. We found no evidence of a nocturnal foraging bias in either species; in particular, these species do not seem to be limited to live capture of nocturnally available squid. Such squid may, nonetheless, contribute to the diet as a result of scavenging.

scholarly journals Large-Scale Patterns of Molt Activation in the Flight Feathers of two Albatross Species

The Condor ◽  
2005 ◽  
Vol 107 (4) ◽  
pp. 835-848 ◽  
Author(s):  
Ann E. Edwards ◽  
Sievert Rohwer
Keyword(s):  
Large Scale ◽  
Foraging Range ◽  
Phoebastria Immutabilis ◽  
Species Specific ◽  
Outer Primary ◽  
Laysan Albatross

Abstract Laysan Albatross (Phoebastria immutabilis) and the closely-related Black-footed Albatross (P. nigripes) replace 20%–90% of their 35–41 wing flight feathers every year. Large-scale molt patterns (patterns between rather than within molt series) account for 77% of the variation in the number of flight feathers replaced. We identified four molt series: series A—the five outer primaries; series B—the five inner primaries plus four outer secondaries; series C—the middle secondaries; and series D—the inner secondaries. A fifth molt series may lie between series C and D. Each year, series A and D initiate molt, but series B and C may or may not initiate molt. The result is four “annual molt patterns”: ABCD, ABD, ACD, and AD. Temporally overlapping waves of molt never occur within series A or B, but about one third of the time they occur within series C and D. Multiple, spatially defined waves of molt (replaced feathers separated by unreplaced feathers) never occur within series A, but occur about two thirds of the time within series B, C, and D. The inner primaries and outer secondaries constitute a single molt series, probably to equilibrate between series total feather length, and thus, total molt duration. Studies of foraging range and reproduction in albatrosses would benefit from the development of species-specific indices of molt duration and extent that are biologically as well as statistically defensible. The number of outer primary feathers replaced and the number of molt series that activate molt are two such indices for Laysan and Black-footed Albatrosses.

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