The food and feeding behaviour of the Great Skua in the Faroes

Bayes, J.C.; Dawson, Melissa; Potts, G. R.

doi:10.1080/00063656409476077

Cited by 22 publications

(15 citation statements)

References 7 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The seasonal decline in kestrel egg length coincides with findings on Great Skuas (Catharacta skua) (Bayes et al 1964), Shags (Coulson et al 1969), Kittiwakes (Rissa tridactyla) (Coulson 1963) and Ring-billed Gulls (Ryder 1975), as well as other Larus species (Barth 1968;Mills 1979). Replacement clutches laid approximately 2 weeks later than first clutches contained longer eggs, whereas in general first clutch eggs laid later in the season became shorter.…”

Section: Discussionsupporting

confidence: 52%

Influence of forced renesting, seasonal date of laying, and female characteristics on clutch size and egg traits in captive American Kestrels

Bird¹,

Laguë²

1982

Can. J. Zool.

View full text Add to dashboard Cite

BIRD, D. M., and P. C. LAGUE. 1982. Influence of forced renesting, seasonal date of laying, and female characteristics on clutch size and egg traits in captive American Kestrels. Can. J. Zool. 60: 71-79. Of 78 nesting attempts by captive American Kestrels (Falco sparverius) between 1974 and 1977,95% successfully renested after removal of the first clutch. Replacement clutches had fewer eggs, longer eggs, and eggs with thicker shells than first clutches. Clutch size, egg length, eggshell thickness, and fresh egg weight declined seasonally. Renesting intervals were shorter in older, experienced layers and clutch size increased by 0.20 eggs with each additional year of age. BIRD, D. M., et P. C. LAGUE. 1982. Influence of forced renesting, seasonal date of laying, and female characteristics on clutch size and egg traits in captive American Kestrels. Can. J. Zool. 60: 7 1-79. Des 78 couples de Crkcerelles amiricaines (Falco sparverius) incitks 8 la nidification en captivitk entre 1974 et 1977,95% ont renidifiC avec succks aprks le retrait de leur premikre couvCe. Les aeufs des deuxikmes couvCes sont moins nombreux, ils sont plus longs et ont des coquilles plus Cpaisses que ceux des prernikres couvCes. Le nombre d'aeufs dans la couvke, la longueur des aeufs, 1'Cpaisseur de la coquille et la masse de l'aeuf frais diminuent avec l'avancement de la saison. Le temps nCcessaire il une seconde nidification est plus court chez les oiseaux plus igCs et ex#rimentks, et le nombre d'aeufs dans une couvke diminue de 0,20 aeuf pour chaque nouvelle annCe d'existence de l'oiseau.

show abstract

Section: Discussionsupporting

confidence: 52%

Influence of forced renesting, seasonal date of laying, and female characteristics on clutch size and egg traits in captive American Kestrels

Bird¹,

Laguë²

1982

Can. J. Zool.

View full text Add to dashboard Cite

show abstract

“…it is reasonable to assume that the birds present at the clubs at this time represent all nonbreeders in the colony. This was also concluded by Bayes et al (1964), who studied a Great Skua colony in the Faroes. The birds present at bathing sites at night are only those associated with the clubs at those sites (i.e.…”

Section: Diurnal Variations and Repeatability Of Countsmentioning

confidence: 69%

“…The concentrated trampling and defaecation by the skuas erode the peat and encourage the rapid growth of grasses in these areas, making the club-sites easily identifiable (Furness 1987a). Bayes et al (1964) suggested that all nonbreeding Great Skuas attending the colony settle at these clubs at night. We obtained a similar result in this study.…”

Section: Introductionmentioning

confidence: 98%

Variations in Numbers of Nonbreeding Great Skuas Attending a Colony

Klomp¹,

Furness²

1990

Ornis Scandinavica

View full text Add to dashboard Cite

show abstract

“…A seasonal decline is apparent in the surface feeding Kittiwake, in the Shag, a littoral nekton predator, and in the Great Skua (Catharacta skua), an aerial predator. There is no evidence o.f a seasonal decline in food availability or food supply during the laying period of either Shag or Kittiwake, and certainly no such change in the food supply of the Great Skua (Bayes et al, 1964). It should also be pointed out that the seasonal decline in clutch size and egg volume in the Shag and Kittiwake is regular from season to season, though the size of the stock of prey species, predominantly Ammodytes, is large but irregular (Macer, 1966).…”

Section: Influence Of Age and Time Of Laying On Egg Size And Shapementioning

confidence: 99%

Variation in the Eggs of the Shag (Phalacrocorax aristotelis)

Coulson

Potts

1969

The Auk

View full text Add to dashboard Cite

J. C. Com•soN, G. R. POTTS, ^N•) JE^N HoRom• T•E size and shape of eggs are important parameters in avian ecology, yet few studies have been made on their biological significance. Under natural conditions the size of eggs both within a clutch' and between clutches laid by different individuals show considerable variation in shape and size and therefore in the quantity and presumably in the quality of their contents. Richdale (1955, 1957) has shown that the Yellow-eyed Penguin (Megadyptes an•tipo.des) shows marked changes in egg size related to the age of the females; similar effects have been found in the Kittiwake (Rissa tridactyla) (Coulson, 1963), the Gannet (Sula bassana) (Nelson, 1966), and the Short-tailed Shearwater (PuJfinus tenuirostris) (Serventy, 1967). In each case the older birds laid larger eggs and had a greater breeding success, but the role of the larger eggs in this increased success is not known. Other studies (e.g. Kendeigh et al. (1956) on the House Wren (Troglodytes aedon) ; Paludan (1952) on Larus argentatus and L. Juscus; Gemperle and Preston (1955) on Sterna hirundo; Coulson (1963) on Rissa tridactyla have shown appreciable differences in the size and shape of eggs in a clutch according to their position in the clutch sequence. This paper presents a detailed analysis of the factors correlated with variation in egg size and shape in the Shag (Phalacrocorax aristotelis) and it has been possible, by using birds of known age, to determine the effects of age and the date of laying on the size of eggs in both this species and the Kittiwake. This type of investigation is an essential prelude to a study of the effects of egg size and quality on the viability of the embryo and of the newly hatched chick.

show abstract

The food and feeding behaviour of the Great Skua in the Faroes

Cited by 22 publications

References 7 publications

Influence of forced renesting, seasonal date of laying, and female characteristics on clutch size and egg traits in captive American Kestrels

Influence of forced renesting, seasonal date of laying, and female characteristics on clutch size and egg traits in captive American Kestrels

Variations in Numbers of Nonbreeding Great Skuas Attending a Colony

Variation in the Eggs of the Shag (Phalacrocorax aristotelis)

Contact Info

Product

Resources

About