Results 41 to 50 of about 4,029 (221)

First Non‐Invasive Monitoring of Fecal Steroids in Greater Caribbean Manatees (Trichechus manatus manatus)

Zoo Biology, EarlyView.
This study established the first fecal hormonal reference values (P4/E2) for the Greater Caribbean manatee. Using non‐invasive ELISA, the authors found no significant differences between mature and immature females, highlighting that long‐term monitoring and ultrasounds are essential to fully understand their complex reproductive cycles.
Vanessa Bermúdez‐Cardona, Roberto Sánchez‐Okrucky, José A. Sandoval‐Zárate, Nataly Castelblanco‐Martínez   +3 more
wiley   +1 more source

ON A SKULL OF A SIRENIAN FROM THE EARLY PLIOCENE OF SIENA, TUSCANY

Rivista Italiana di Paleontologia e Stratigrafia, 2020
A fine skull of a sirenian from Early Pliocene littoral sands with Late Ruscinian terrestrial mammals near Siena is referred to Metaxitherium gervaisi (Capellini, 1872); it provides detailed information on the characters of this species, which was ...
DANIELA CANOCCHI
doaj  

Establishing death in stranded Odontocetes (toothed whales) using other mammals : a pilot study : a thesis presented in partial fulfillment of the requirements for the degree of Master of Science in Zoology at Massey University [PDF]

, 2003
The aim of this study was to investigate and evaluate a new method for determining death in stranded odontocetes (toothed whales). The new method was using the pulsations seen in the retinal blood vessels in the place of the heart rate. The retinal blood
Paul, Katherine A
core  

Habitat Suitability for a Unique, Fully Marine American Manatee (Trichechus manatus) Population Primarily Depends on Presence of Submarine Freshwater Springs

Marine Mammal Science, Volume 42, Issue 3, July 2026.
ABSTRACT The American manatee (Trichechus manatus) requires freshwater mainly from rivers and springs to maintain osmoregulatory balance in saline environments. However, in Brazil's semi‐arid Potiguar Basin, manatees now rely solely on submarine freshwater springs because hypersaline estuaries have become unsuitable sources of freshwater.
A. C. O. Meirelles, I. C. Normande, M. D. O. Alves, K. F. Choi, V. L. Carvalho, J. C. G. Borges, L. von Fersen, Andrew W. Trites   +7 more
wiley   +1 more source

Adaptive evolution toward larger size in mammals [PDF]

, 2015
The notion that large body size confers some intrinsic advantage to biological species has been debated for centuries. Using a phylogenetic statistical approach that allows the rate of body size evolution to vary across a phylogeny, we find a long-term ...
Alexander, Andrew Meade, Chris Venditti, Gould, Joanna Baker, Mark Pagel   +5 more
core   +1 more source

Microglial GPR35 Ameliorates Epileptogenesis and Neuroinflammation via PDGFA Domain 2 Signaling

Advanced Science, Volume 13, Issue 19, 2 April 2026.
Activation of microglial G protein–coupled receptor 35 (GPR35) by L‐kynurenic acid (L‐Kyna) initiates a platelet‐derived growth factor A (PDGFA)–dependent phosphoinositide 3‐kinase–protein kinase B (PI3K–AKT) signaling cascade that dampens hippocampal neuroinflammation, thereby restraining epileptogenesis, lowering seizure susceptibility, and ...
Qi Wang, Tingting Qu, Qibing Sun, Ran Li, Junfei Dong, Yuming Du, Ziyin Xuan, Lei Wang, Hanli Li, Jianyun Sun, Fangliang Chen, Jinshuai Liu, Zifan Yang, Jianxiang Lei, Qian Yang, Bin Wang, Zhiming Zhou, Yu Wang   +17 more
wiley   +1 more source

Kognitívny a evolučný kontext šírenia konšpirračných teórií [PDF]

Slovenský Národopis, 2015
The goal of this article is to provide a cognitive explanation of some aspects of conspiracy theories which influence their spread in society. One important human mental capacity is the ability to produce beliefs about mental states (intentions ...
Vladimír Bahna
doaj  

Diet composition of the African manatee: Spatial and temporal variation within the Sanaga River Watershed, Cameroon

Ecology and Evolution, 2021
The present study aimed to investigate the diet of African manatees in Cameroon to better inform conservation decisions within protected areas. A large knowledge gap on diet and seasonal changes in forage availability limits the ability to develop ...
Aristide Takoukam Kamla, Dylan G. E. Gomes, Cathy A. Beck, Lucy W. Keith‐Diagne, Margaret E. Hunter, Ruth Francis‐Floyd, Robert K. Bonde   +6 more
doaj   +1 more source

Cytochemical staining of leukocytes and platelets in the Florida manatee (Trichechus manatus latirostris): identification of a bilobed monocyte similar to other members of the Paenungulata

Frontiers in Veterinary Science, 2023
Manatees (Antillean-, Amazonian, and African-) and dugongs belong to the Order Sirenia, and when combined with elephants and rock hyraxes, form the Paenungulata. A bilobed mononuclear cell has previously been identified in elephants and rock hyraxes, but
Laura A. Cagle, Nicole I. Stacy, John W. Harvey, Martine de Wit, Laurie Adler, Michael Walsh, Robert Bonde, Tracy Stokol   +7 more
doaj   +1 more source

Anatomy and morphology adaptation of sea mammals [PDF]

, 2010
Morski sisavci uključuju dvije brojne i široke grupe, Cetacea (kitovi) i Pinnipedia (tuljani, morski lavovi i morževi), te manje brojnu grupu Sirenia. Svaka grupa morskih sisavaca je evoluirala od pretka na kopnu te se sekundarno vratila životu u vodi ...
Blažeković, Kristina
core   +2 more sources