Magnificent Frigatebird (Fregata magnificens) Science Article 3 abstract Male magnificent frigatebird (Fregata magnificens) ornamentationincludes bright iridescent plumage and a red inflatablegular pouch. These signals are displayed during courtship, alongwith a drumming sound produced through specialized beak clackingsresonating in the gular pouch. The extent of white in theplumage identifies three age classes of nonjuvenile male. Here […]
Category: Suliformes
Morphology and Ornamentation in Male MagnificentFrigatebirds: Variation with Age Classand Mating Status
Magnificent Frigatebird (Fregata magnificens) Science Article 3 abstract Male magnificent frigatebird (Fregata magnificens) ornamentationincludes bright iridescent plumage and a red inflatablegular pouch. These signals are displayed during courtship, alongwith a drumming sound produced through specialized beak clackingsresonating in the gular pouch. The extent of white in theplumage identifies three age classes of nonjuvenile male. Here […]
Sexual conflict and parental care in magnificent frigatebirds:full compensation by deserted females
Magnificent Frigatebird (Fregata magnificens) Science Article 2 abstract Parental care is a cooperative venture between a male and a female in many socially monogamous birds. Care is costly, and thus, sexual conflict arises between the parents about how much effort they should invest into rearing their young. The sexual conflict over care is most apparent […]
Sexual conflict and parental care in magnificent frigatebirds:full compensation by deserted females
Magnificent Frigatebird (Fregata magnificens) Science Article 2 abstract Parental care is a cooperative venture between a male and a female in many socially monogamous birds. Care is costly, and thus, sexual conflict arises between the parents about how much effort they should invest into rearing their young. The sexual conflict over care is most apparent […]
FLIGHT SPEEDS AND WINGBEAT FREQUENCIESOF THE MAGNIFICENT FRIGATEBIRD
Magnificent Frigatebird (Fregata magnificens) Science Article 1 abstract Fregatebirds are well specialized for remaining airborne for long periods of time. Unfortunately relatively little is actually known about their flight capabilities. The Magnificent Frigatebird (Fregata magnificens) is primarily a New World species and is seen regularly along the southern coasts of the United States. In the […]
FLIGHT SPEEDS AND WINGBEAT FREQUENCIESOF THE MAGNIFICENT FRIGATEBIRD
Magnificent Frigatebird (Fregata magnificens) Science Article 1 abstract Fregatebirds are well specialized for remaining airborne for long periods of time. Unfortunately relatively little is actually known about their flight capabilities. The Magnificent Frigatebird (Fregata magnificens) is primarily a New World species and is seen regularly along the southern coasts of the United States. In the […]
Plumage and sexual maturation in the Great Frigatebird Fregata minor in the Galapagos Islands
Great Frigatebird (Fregata minor) Science Article 1 abstract The adaptive significance of distinctive immature plumages and protracted sexual and plumage maturation in birds remains controversial. This study aimed to establish the pattern of plumage maturation and the age at first breeding in the Great Frigatebird Fregata minor in the Galapagos Islands. We found that Great […]
Extrinsic and intrinsic determinants of winter foragingand breeding phenology in a temperate seabird
European Shag (Phalacrocorax aristotelis) Science Article 2 abstract In temperate regions, winter presents animals with a number of challenges including depressed food abundance, increased daily energy requirements, higher frequency of extreme weather events and shortened day length. Overcoming these constraints is critical for overwintering survival and scheduling of future breeding of long-lived species and is […]
Chick mortality in European Shag Stictocarbo aristotelis related to food limitations during adverse weather events.
European Shag (Phalacrocorax aristotelis) Science Article 3 abstract This study analyses the mortality of chicks of the European Shag Stictocarbo aristotelis in the Cies Islands (NW Spain). Chick mortality on this island is the main cause of the yearly variation in chick production. By visiting the nests after hatching occurred we determined the periods of […]
Sex-specific growth in the European Shag Stictocarbo aristotelis, a sexually dimorphic seabird
European Shag (Phalacrocorax aristotelis) Science Article 1 abstract The European Shag Stictocarbo aristotelis is dimorphic in body size : males are 22% heavier than females . We used molecular techniques to sex of 25 male and 18 female chicks in colonies from the Cies Islands (NW Spain). Discriminant functions were then obtained based on morphometric […]