Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Johann H. van Niekerk"'
Autor:
Peter Mikula, Oldřich Tomášek, Dušan Romportl, Timothy K. Aikins, Jorge E. Avendaño, Bukola D. A. Braimoh-Azaki, Adams Chaskda, Will Cresswell, Susan J. Cunningham, Svein Dale, Gabriela R. Favoretto, Kelvin S. Floyd, Hayley Glover, Tomáš Grim, Dominic A. W. Henry, Tomas Holmern, Martin Hromada, Soladoye B. Iwajomo, Amanda Lilleyman, Flora J. Magige, Rowan O. Martin, Marina F. de A. Maximiano, Eric D. Nana, Emmanuel Ncube, Henry Ndaimani, Emma Nelson, Johann H. van Niekerk, Carina Pienaar, Augusto J. Piratelli, Penny Pistorius, Anna Radkovic, Chevonne Reynolds, Eivin Røskaft, Griffin K. Shanungu, Paulo R. Siqueira, Tawanda Tarakini, Nattaly Tejeiro-Mahecha, Michelle L. Thompson, Wanyoike Wamiti, Mark Wilson, Donovan R. C. Tye, Nicholas D. Tye, Aki Vehtari, Piotr Tryjanowski, Michael A. Weston, Daniel T. Blumstein, Tomáš Albrecht
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-10 (2023)
Abstract Animal tolerance towards humans can be a key factor facilitating wildlife–human coexistence, yet traits predicting its direction and magnitude across tropical animals are poorly known. Using 10,249 observations for 842 bird species inhabit
Externí odkaz:
https://doaj.org/article/e023202530c94206b060ac9b2028e0cb
Autor:
Johann H. van Niekerk
Publikováno v:
Avian Research, Vol 14, Iss , Pp 100106- (2023)
The role of bare body parts in sexual signalling in birds has received relatively little attention. I describe how the bare-throated spurfowl males saturate the colours of their throats to attract females. Of the 23 Afrotropical spurfowl species, the
Externí odkaz:
https://doaj.org/article/af988e2cb61d4e80beef66df066a4d9e
Publikováno v:
Avian Research, Vol 13, Iss , Pp 100047- (2022)
The responses of ground-dwelling birds to heat and cold stress encompass a variety of behavioural, physiological and even morphological mechanisms. However, the role of glabrous skin in this respect has been marginally addressed so far. The Helmeted
Externí odkaz:
https://doaj.org/article/e7a10496bd984ae1b33e66e49fa25fc7
Publikováno v:
Avian Research, Vol 9, Iss 1, Pp 1-18 (2018)
Abstract Background This paper describes the chick plumage of spurfowl (Pternistis) and francolin (Francolinus, Dendroperdix, Peliperdix and Scleroptila) chicks, tests its significance for phylogenetic relationships and also explores the patterns of
Externí odkaz:
https://doaj.org/article/15a4bb99820e4293b8b1b51823ab9a07
Autor:
Johann H. van Niekerk
Publikováno v:
Avian Research, Vol 8, Iss 1, Pp 1-8 (2017)
Abstract Background How do Orange River Francolins (Scleroptila levaillantoides) adapt to an intensive farming landscape with grass (grazing) camps and crop cultivation? To answer this question, a study was carried out in south-east of Johannesburg i
Externí odkaz:
https://doaj.org/article/1f4c94e5dd6c421fbc0122df6dfe0410
Publikováno v:
Ibis. 163:1409-1424
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a11cc22dca0e53f8907bf38efb18fb57
https://doi.org/10.1111/ibi.12945
https://doi.org/10.1111/ibi.12945
Autor:
Johann H van Niekerk, Giovanni Forcina
Publikováno v:
Ostrich. 91:326-337
The study of diel and seasonal variation in vocal interactions of Crested Francolin Ortygornis sephaena territorial males helps clarify its purpose, thus delivering insights into the behavioural ec...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bead585c94a8df99c77ebf820288997a
https://doi.org/10.2989/00306525.2020.1827463
https://doi.org/10.2989/00306525.2020.1827463
Autor:
Johann H van Niekerk
Publikováno v:
Ostrich: Journal of African Ornithology; Vol 90, No 2 (2019); 183-186
This paper describes the plumage and morphology development of 11 age classes of Red-necked Spurfowl Pternistis afer to assist with field observations. Sixteen spurfowl were marked with coloured leg rings in the Cannon Rocks Holiday Resort, Eastern C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6615f6b7d46f826d4efd5033c7a56bd9
https://doi.org/10.2989/00306525.2019.1604577
https://doi.org/10.2989/00306525.2019.1604577
Autor:
Johann H van Niekerk
Conserved remnants of indigenous vegetation patches and corridors are regarded as important components of the built environment for the survival of birds. Field research was conducted at Boknes and Cannon Rocks in the Eastern Cape Province, South Afr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ec42cc4b9f9adeaa5999f680375916c
Publikováno v:
Avian Research, Vol 9, Iss 1, Pp 1-18 (2018)
Background This paper describes the chick plumage of spurfowl (Pternistis) and francolin (Francolinus, Dendroperdix, Peliperdix and Scleroptila) chicks, tests its significance for phylogenetic relationships and also explores the patterns of character
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88091859158610f4cd21c95798b31ce4
http://link.springer.com/article/10.1186/s40657-017-0093-2
http://link.springer.com/article/10.1186/s40657-017-0093-2