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Morphometric sexing of Mediterranean Yellow-legged Gulls Larus michahellis michahellis breeding in the Gulf of Gabès, southern Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, TunisiaDiscriminant analysis functions have previously been determined for sexing Mediterranean Yellow-legged Gulls Larus michahellis michahellis from the western Mediterranean basin. However, data from eastern Mediterranean populations are lacking. In this work, we used morphometric data from a sample of 81... -
Sex determination of African Penguins Spheniscus demersus using bill measurements: method comparisons and implications for use
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kate J Campbell --- Animal Demography Unit, Department of Biological Sciences, South Africa Danielle Farah --- School of Biological Sciences, UK Sarah Collins --- School of Biological Sciences, UK Nola J Parsons --- Southern African Foundation for the Conservation of Coastal Birds, South AfricaAfrican Penguins Spheniscus demersus are sexually dimorphic; on average, males are larger than females but measurements overlap making sex determination difficult through observations alone. We developed a discriminant function, using bill length and depth from a sample of birds sexed... -
Sexual size dimorphism and morphometric sexing in a North African population of Laughing Doves Spilopelia senegalensis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tasnim Ayadi --- Département des Sciences de la Vie, Faculté des Sciences, Tunisia Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences, Tunisia Samia Kididi --- Laboratoire d’Elevage et Faune Sauvage, Tunisia Mohamed Habib Yahyaoui --- Laboratoire d’Elevage et Faune Sauvage, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences, TunisiaLike the majority of Columbiformes, the Laughing Dove Spilopelia senegalensis is sexually monomorphic in plumage, but seems to be slightly dimorphic in size. However, due to the lack of studies little is known about the sexual size dimorphism in this... -
The taxonomic position and breeding range of Golden Nightjar Caprimulgus eximius (Caprimulgidae)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Yvonne Lawrie --- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, UK Robert Swann --- , UK Peter Stronach --- , UK Yoav Perlman --- Israel Ornithological Center, Israel J Martin Collinson --- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, UKGolden Nightjar Caprimulgus eximius is an apparently sedentary sub-Saharan species with a breeding range extending from Senegal and Mauritania to Sudan. Although genetic studies of nightjars and related Caprimulgiformes have been published previously, none has included Golden Nightjar. In this... -
Sex determination of Kelp Gull Larus dominicanus vetula using head and bill measurements
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Albert Snyman --- , South Africa Elana Mostert --- , South Africa Katrin Ludynia --- , South AfricaKelp Gulls Larus dominicanus are not sexually dimorphic by plumage or visual characteristics and it is therefore difficult to distinguish males from females in the field. This paper assesses the sexual size dimorphism in this species and provides reliable methods... -
Sexual and individual signatures are encoded in the temporal rate of Cape Gannet Morus capensis display calls
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kezia Bowmaker-Falconer --- , South Africa Andréa Thiebault --- , South Africa Maëlle Connan --- , South Africa Thierry Aubin --- , France Isabelle Charrier --- , France Pierre Pistorius --- , South AfricaVocalisations play a vital role in animal communication, as they are involved in many biological functions such as mate selection, individual recognition and care of young. Seabirds often breed in large and dense colonies, making successful recognition between mates or... -
Genetic and morphological variation of Woodland Kingfisher Halcyon senegalensis reveals cryptic mitochondrial lineages and patterns of mitochondrial–nuclear discordance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Monica Mwale --- South African National Biodiversity Institute (SANBI), South Africa Desiré L Dalton --- South African National Biodiversity Institute (SANBI), South Africa Anna S Kropff --- South African National Biodiversity Institute (SANBI), South Africa Kim Labuschagne --- South African National Biodiversity Institute (SANBI), South Africa Isa-Rita Russo --- Cardiff University, United Kingdom Samuel T Osinubi --- University of Cape Town, South AfricaThe Woodland Kingfisher Halcyon senegalensis is widely distributed throughout sub-Saharan Africa and occupies a wide variety of woodland and savannah habitat. Thus far, three subspecies have been described based on morphological variation. In the present study, using western, eastern and...