Results 51 to 60 of about 2,177 (154)
Journal of Morphology, Volume 285, Issue 6, June 2024.We describe the nearly complete digital endocasts of the brain and bony labyrinth of the neotype specimen of Lithornis vulturinus, a palaeognathous bird from the early Eocene of Europe. Lithornis may provide the clearest insights to date into the neuroanatomy of the ancestral crown bird, combining an ancestrally unflexed brain with a caudally oriented ...
Klara E. Widrig +2 more
wiley +1 more source
Global diversity and adaptations of avian eggshell thickness indices
Ibis, Volume 166, Issue 2, Page 534-550, April 2024.The amniote eggshell is a fundamental aspect of the embryo life‐support system, protecting it from UV light, microbes and mechanical damage, while regulating gas exchange and providing calcium for growth. The thickness of eggshells is highly diverse across modern birds and influences multiple eggshell functions, yet the selective pressures driving ...
Marie R. G. Attard, Steven J. Portugal
wiley +1 more source
Killing for Trophies: An Analysis of Global Trophy Hunting Trade [PDF]
, 2016 As the trophy hunting industry has grown over the last few decades, governments, conservationists, and animal welfare advocates are keen to understand its global economic and conservation impacts with data as supporting evidence.
Jeff Flocken +4 more
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Journal of Comparative Neurology, Volume 532, Issue 3, March 2024.Illustration of the endocranial doming, which can provide a proxy for the brain‐to‐endocranial cavity index, using the endocast of an adult of the iguanodont dinosaur Proa valdearinnoensis as an example. Abstract Although the brain fills nearly the entire cranial cavity in birds, it can occupy a small portion of it in crocodilians.
Fabien Knoll +2 more
wiley +1 more source
Nuclear parcellation and numbers of orexinergic neurons in five species of larger brained birds
Journal of Comparative Neurology, Volume 532, Issue 3, March 2024.Immunohistochemical staining for orexin‐A reveals the orexinergic neuronal population in the hypothalamus of the Congo gray parrot. The arrangement of orexinergic neurons in the avian hypothalamus shows distinct conservation across avian species, unlike the variance noted in mammals. Abstract The orexinergic/hypocretinergic system, while having several
Pedzisai Mazengenya +2 more
wiley +1 more source
BioEssays, Volume 46, Issue 1, January 2024.We propose that fovea formation involves dynamic and asymmetric changes in ocular shape in humans and other species with foveated eyes. Abstract The human fovea is known for its distinctive pit‐like appearance, which results from the displacement of retinal layers superficial to the photoreceptors cells.
Ashley M. Rasys +5 more
wiley +1 more source
Fauna of islands and island habitats [PDF]
, 2009 Na otocima nalazimo mnogo različitih staništa i životinja, koje se u većini slučajeva razlikuju od njihovih srodnika na kopnu. Te razlike ovise o vrsti otoka (kojeg je postanka), površine i udaljenosti od najbližeg kopna.
Burić, Ivona
core +2 more sources
Disruption of FEM1C-W gene in zebra finch: evolutionary insights on avian ZW genes [PDF]
, 2009 Sex chromosome genes control sex determination and differentiation, but the mechanisms of sex determination in birds are unknown. In this study, we analyzed the gene FEM1C which is highly conserved from Caenorhabditis elegans to higher vertebrates and ...
Arthur P. Arnold +2 more
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New Zealand: land or marine island? [PDF]
, 2010 Područje Novog Zelanda iznimno je zanimljivo područje za biogeografska istraživanja jer nam daje uvid u procese širenja biljnih i životinjskih vrsta koji bi, osim lokalnog, mogli biti primjer globalnog naseljavanja tijekom geološke povijesti Zemlje ...
Bjelić, Maja
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Evolutionary Dynamics of Intron Size, Genome Size, and Physiological Correlates in Archosaurs [PDF]
, 2002 It has been proposed that intron and genome sizes in birds are reduced in comparison with mammals because of the metabolic demands of flight. To test this hypothesis, we examined the sizes of 14 introns in a nonflying relative of birds, the American ...
Edwards, Scott, Waltari, Eric
core +1 more source