Skeletal morphoanatomy of the Brown Skua Stercorarius antarcticus lonnbergi and the South Polar Skua Stercorarius maccormicki

Hospitaleche, Carolina Acosta; Montalti, Diego; Marti, Lucas J.

doi:10.1007/s00300-008-0579-9

Cited by 10 publications

(9 citation statements)

References 18 publications

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“…As well as genetic differences from southern hemisphere skuas, Great Skua differs from all other skuas in plumage at most ages (Furness 1987, Malling‐Olsen & Larsson 1997). Among the southern skuas, Chilean Skua Stercorarius skua chilensis and South Polar Skua Stercorarius skua maccormicki are well differentiated on the basis of morphology from Brown Skua taxa, Stercorarius skua antarcticus , Stercorarius skua hamiltoni and Stercorarius skua lonnbergi (Furness 1987, see also Hospitaleche et al. 2009).…”

Section: Great Skua Stercorarius Skuamentioning

confidence: 99%

Taxonomic recommendations for British birds: seventh report

Sangster

Collinson

Crochet

et al. 2011

Ibis

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Section: Great Skua Stercorarius Skuamentioning

confidence: 99%

Taxonomic recommendations for British birds: seventh report

Sangster

Collinson

Crochet

et al. 2011

Ibis

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“…Brown (Stercorarius antarcticus) and south polar (S. maccormicki) skuas are coastal and pelagic seabirds. They are scavengers, and feed on fish (in shallow waters, near the surface submerging only their heads) or prey on eggs and chicks of other bird species (Furnes 1996;Acosta Hospitaleche et al 2009;Graña Grilli and Montalti 2012 The body mass of each bird was recorded with a spring balance (accuracy AE5 g) and the gland was dissected following the protocol described in Montalti et al (1998) and weighed (accuracy AE0.001 g). These values were used to calculate the gland mass as a percentage of body mass in each bird: Gland Mass Â 100=Body Mass ¼ Relative Gland Mass A regression analysis was performed using Statistica 7.0 software.…”

Section: Methodsmentioning

confidence: 99%

Morphology and histology of the uropygial gland in Antarctic birds: relationship with their contact with the aquatic environment?

et al. 2014

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The uropygial gland is morphologically different in diverse bird species. This gland was macroscopically and microscopically examined in penguins, storm petrels and skuas. In all the studied species, the gland showed a connective tissue capsule and one papilla. A negative relationship was observed between the relative glandular mass and the body mass, being highest in petrels (small glands) and lowest in penguins (large glands). Birds that spend much time in water (penguins) have gland characteristics related to a continuous, but not stored, secretion, such as straight adenomers, the presence of abundant elastic fibres in the connective tissue and the absence of a primary storage chamber. Instead, birds that have less contact with water (storm petrels) have a gland with much more tortuous adenomers and a small primary storage chamber. The secretory cells showed a positive PAS reaction in all the glandular zones. Therefore, no differences could be seen between the sebaceous and glucogenic zones, as proposed in other birds. These results allow the conclusion that, in aquatic birds, there is no connection between the relative mass of the uropygial gland and the time in contact with water, though the differences found in the histological structure could be related to a different contact with the aquatic environment.

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“…Various studies have been carried out on the avian skull morphology. Some of these studies have been performed on different avian species, such as penguins (Acosta, 2009;Acosta and Tambussi, 2006) skuas (Acosta et al, 2009) and Tinamidae (Degrange and Picasso, 2010) and some of them have been fulfilled using geometric morphometric methods (Acosta, 2009;Acosta and Tambussi, 2006;Degrange and Picasso, 2010;Morugán-Lobón and Buscalioni, 2006). In another study, the characteristics of the neurocranial shape variations of birds have been examined by using the advanced graphical imaging method (Morugán-Lobón and Buscalioni, 2009).…”

Section: Introductionmentioning

confidence: 99%

Comparative Morphometric Studies of the Cranium in the Three Types of Birds with Different Feeding Behaviors

Elshaer

2019

Egyptian Academic Journal of Biological Sciences, B. Zoology

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The present work was particularly designed to study the comparative anatomy of the skull of three different feeding Aves species inhibiting in Egypt. This study demonstrates that both size and shape are important components in the morphological differentiation of the skulls of carnivorous Kingfisher (Halcyon smyrnensis), insectivore Hoopoes (Upupa epops) and Omnivores Chicken (Gallus gallus domesticus) which clarify the relationship between size, shape of the skull and the type of feeding behavior. This paper presents a morphometric analysis of Kingfisher, Hoopoes and chicken skulls. Analyses are performed using traditional analytic and morphometric methods.

show abstract

Skeletal morphoanatomy of the Brown Skua Stercorarius antarcticus lonnbergi and the South Polar Skua Stercorarius maccormicki

Cited by 10 publications

References 18 publications

Taxonomic recommendations for British birds: seventh report

Taxonomic recommendations for British birds: seventh report

Morphology and histology of the uropygial gland in Antarctic birds: relationship with their contact with the aquatic environment?

Comparative Morphometric Studies of the Cranium in the Three Types of Birds with Different Feeding Behaviors

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