Results 11 to 20 of about 462,759 (216)

Histological Analysis of Gonadal Ridge Development and Sex Differentiation of Gonads in Three Gecko Species

open access: yesBiology, 2023
Reptiles constitute a highly diverse group of vertebrates, with their evolutionary lineages having diverged relatively early. The types of sex determination exemplify the diversity of reptiles; however, there are limited data regarding the gonadal ...
Izabela Rams-Pociecha   +2 more
doaj   +1 more source

Evolutionary history of mental glands in turtles reveals a single origin in an aquatic ancestor and recurrent losses independent of macrohabitat

open access: yesScientific Reports, 2021
Despite the relevance of chemical communication in vertebrates, comparative examinations of macroevolutionary trends in chemical signaling systems are scarce.
Alejandro Ibáñez   +7 more
doaj   +1 more source

Surface Electromyography of the Longissimus and Gluteus Medius Muscles in Greyhounds Walking and Trotting on Ground Flat, Up, and Downhill

open access: yesAnimals, 2020
In the field of canine rehabilitation, knowledge of muscle function in the therapeutic exercises prescribed is needed by physical therapists and veterinary surgeons.
Francisco Miró   +3 more
doaj   +1 more source

Prevalence of Mycobacterium avium Subsp. paratuberculosis in Feral Pigeons (Columba livia) Associated with Difficulties Controlling Paratuberculosis in a Bovine Herd (Fighting Bull Breed)

open access: yesAnimals, 2022
A bovine herd with a high prevalence of paratuberculosis (PTB) cohabiting with a population of pigeons was studied (2011–2020). After finding the disease in 2011, annual monitoring was performed in 2012–2014 by obtaining blood samples for ELISA and ...
Juan Seva   +5 more
doaj   +1 more source

Macroanatomical investigations of the skulls of both genders of Heliosciurus gambianus (Gambian sun squirrel) and Funisciurus anerythrus (Thomas’s rope squirrel)

open access: yesJournal of Basic and Applied Zoology, 2023
Background The skull shape and morphometry have been used by several researchers to differentiate and classify species, breeds and also to age the specimen. This study highlights details of the gross morphometry of the skulls of two species of squirrels,
Olumayowa Olawumi Igado   +2 more
doaj   +1 more source

Variation of Human Hairiness: A Possible Adaptation to Solar Radiation and Melanin

open access: yesAnthropological Review, 2014
Many theories have been advanced to explain human hairlessness, however, there is no consensus. This study of 76 males observed that skin reflectance measuring skin colouration and melanin pigmentation correlated with hair size and follicle density ...
Dhugga Amrita   +2 more
doaj   +1 more source

Real-Time PCR Validation for Mycobacterium tuberculosis Complex Detection Targeting IS6110 Directly From Bovine Lymph Nodes

open access: yesFrontiers in Veterinary Science, 2021
Rapid and accurate diagnostic tools, such as Real-Time PCR (qPCR), need to be implemented as a confirmatory test in the framework of bovine tuberculosis (bTB) surveillance and control programs, shortening the turnaround time to confirm bTB infection. The
José María Sánchez-Carvajal   +14 more
doaj   +1 more source

Cognitive and behavioral modernity in Homo erectus: skull globularity and hominin brain evolution

open access: yesAnthropological Review, 2022
In this article we provide evidence that evolutionary pressures altered the cranial base and the mastoid region of the temporal bone more than the calvaria in the transition from H. erectus to H. sapiens.
Clark Gary, Henneberg Maciej
doaj   +1 more source

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