Results 11 to 20 of about 619 (170)

Influence of Intramineral Proteins on the Growth of Carbonate Crystals Using as a Scaffold Membranes of Ratite Birds and Crocodiles Eggshells [PDF]

Membranes, 2023
The lack of information on structural basis where proteins are involved, as well as the biomineralization processes of different systems such as bones, diatom frustules, and eggshells, have intrigued scientists from different fields for decades.
Nerith R. Elejalde-Cadena, Denisse Hernández, Francesco Capitelli, Selene R. Islas, Maria J. Rosales-Hoz, Michele Zema, Serena C. Tarantino, Dritan Siliqi, Abel Moreno   +8 more
doaj   +2 more sources

Sex determination in ratite and non ratite birds by molecular method

Indian Journal of Animal Sciences, 2016
In spite of number of methods for sex determination in birds, it is very difficult to distinguish sex especially in ratite birds due to lack of sexual dimorphism.
RISHABH BHATT, A C PATEL, T K JISHA, SHEFALI MACWAN, RIDHDHI THAKER, D N RANK   +5 more
doaj   +2 more sources

Immunostaining of P450c17, Aromatase and Oestrogen Receptor Alpha in Germ and Somatic Cells During Gonadal Development in Greater Rhea. [PDF]

Anat Histol Embryol
ABSTRACT The greater rhea (Rhea americana), the largest bird species in South America, has significant economic value due to its meat, eggs, leather, feathers and oil. However, its lack of external sexual dimorphism poses challenges for reproductive management and breeding programmes.
Cristofoli M, de Brito DCC, Alcobaça MMO, Donoso FMPM, Jorge FMG, Novaes MAS, Oliveira MF, de Assis Neto AC.   +7 more
europepmc   +2 more sources

Management of intertarsal septic arthritis in an ostrich (Struthio camelus) [PDF]

Veterinary Medicine and Science, 2022
A 7‐year‐old female ostrich (Struthio camelus) presented with lameness, left intertarsal joint swelling and a healing wound on the caudomedial aspect of the joint.
Melanie J. Peel, Rodrigo S. Garcés Torres, Marina Ivančić, Benjamín E. Alcántar Hernández   +3 more
doaj   +2 more sources

Egg Incubation Mechanics of Giant Birds [PDF]

Biology, 2021
Finite element analysis (FEA) was used to conduct mechanical analyses on eggshells of giant birds, and relate this to the evolution and reproductive behavior of avian species. We aim to (1) investigate mechanical characteristics of eggshell structures of
An Yen, Hsiao-Jou Wu, Pin-Yi Chen, Hon-Tsen Yu, Jia-Yang Juang   +4 more
doaj   +2 more sources

Impact of Season, Semen Collection Frequency and Between-Male Variation on Ostrich Seminal Plasma Composition. [PDF]

Reprod Domest Anim
ABSTRACT This study evaluated the effect of season, semen collection frequency, and male variation on seminal plasma composition of farmed ostriches. Five South African Black ostrich males (4.47 ± 0.95 years of age) were used in spring 2011 and winter 2012.
Muvhali P, Bonato M, Malecki I, Douglas K, Swart P, Cloete S.   +5 more
europepmc   +2 more sources

Persistent conflict in palaeognath phylogeny revealed by quartet-based and ML analyses [PDF]

Frontiers in Zoology
Background The evolutionary relationships among palaeognath birds remain contentious despite extensive phylogenomic analyses. While the ostrich is consistently identified as the earliest diverging lineage, the relationships among non-ostrich palaeognaths
Patrick Kück, Alexander Suh
doaj   +2 more sources

Serum Biochemistry of Greater Rhea (Rhea americana) in Captivity in the Northeast of Brazil [PDF]

Animals, 2023
We investigated the biochemical profile of greater rheas (Rhea americana) in captivity and correlated these values according to the birds’ sex. A total of 69 serum samples were collected from a breeding site in Mossoró, northeastern Brazil, and analyzed ...
Antonio Humberto Hamad Minervino, Carolina A. S. C. Araújo, Herbert S. Soares, Eloine M. B. Picanço, Yasmine R. Batista Silva, Clara Satsuki Mori, Solange Maria Gennari, Raimundo Alves Barrêto Júnior, Enrico Lippi Ortolani   +8 more
doaj   +2 more sources

ENHYDROSS: A New Mechanistic Model Supports the Trans-Oceanic Dispersal Capability of Terrestrial Vertebrates. [PDF]

Ecol Evol
We introduce ENHYDROSS, a new mechanistic model that uses optimal swimming speed and minimum cost of transport to estimate maximum dispersal distances and durations for vertebrates, enabling assessment of long‐distance oceanic dispersal potential. Applied to a range of extant and extinct animals, the model's estimates generally align with observed data;
Pantelides A, Upchurch P, Mannion PD, Gravanis E, Henderson DM, Kyriakidis P.   +5 more
europepmc   +2 more sources

Brain shapes of large-bodied, flightless ratites (Aves: Palaeognathae) emerge through distinct developmental allometries [PDF]

Royal Society Open Science
Comparative neuroanatomical studies have long debated the role of development in the evolution of novel and disparate brain morphologies. Historically, these studies have emphasized whether evolutionary shifts along conserved or distinct developmental ...
Meghan R. Forcellati, Todd L. Green, Akinobu Watanabe   +2 more
doaj   +2 more sources