Results 41 to 50 of about 1,321 (169)

MYOCARDIAL STRUCTURE AND VASCULARIZATION OF THE HEART VENTRICLE IN HOLOCEPHALI: IMPLICATIONS FOR HEART EVOLUTION [PDF]

open access: yes, 2013
El resumen aparece en el Program & Abstracts of the 10th International Congress of Vertebrate Morphology, Barcelona 2013. Anatomical Record, Volume 296, Special Feature — 1: P-075.It has been classically assumed that the ventricle of the primitive ...
Durán, Ana C.   +5 more
core  

A standardized terminology for describing reproductive development in fishes [PDF]

open access: yes, 2011
19 páginas, 12 figuras, 3 tablas.-- Open access journalAs the number of fish reproduction studies has proliferated, so has the number of gonadal classification schemes and terms.
Alekseyev F. Y.   +51 more
core   +1 more source

The impact of isosmotic conditions on the metabolism and hypoxia tolerance of a reportedly oxyconforming teleost

open access: yesJournal of Fish Biology, EarlyView.
Abstract Fish must manage the competing demands of ion balance and gas exchange across the gills – a physiological tension known as the osmorespiratory compromise. In dynamic estuarine environments, the osmorespiratory compromise may be exacerbated by variable salinity and periods of hypoxia that demand high respiratory work.
Timothy D. Clark   +4 more
wiley   +1 more source

Expression of three GnRH receptors in specific tissues in male and female sea lampreys Petromyzon marinus at three distinct life stages [PDF]

open access: yes, 2013
Two recently cloned gonadotropin-releasing hormone (GnRH) receptors (lamprey GnRH-R-2 and lamprey GnRH-R-3) along with lamprey (l) GnRH-R-1 were shown to share similar structural features and amino acid motifs common to other vertebrate receptors.
Daukss, Dana M.   +3 more
core   +1 more source

Beyond mammals: the evolution of chewing and other forms of oropharyngeal food processing in vertebrates

open access: yesBiological Reviews, Volume 101, Issue 3, Page 1406-1462, June 2026.
ABSTRACT Oropharyngeal food processing exhibits a remarkable diversity among vertebrates, reflecting the evolution of specialised ‘processing centres’ associated with the mandibular, hyoid, and branchial arches. Although studies have detailed various food‐processing strategies and mechanisms across vertebrates, a coherent and comprehensive terminology ...
Daniel Schwarz   +6 more
wiley   +1 more source

Early Silurian chondrichthyans from the Tarim Basin (Xinjiang, China).

open access: yesPLoS ONE, 2020
The Sinacanthida ordo nov. and Mongolepidida are spine- and scale-based taxa whose remains encompass some of the earliest reported fossils of chondrichthyan fish.
Plamen S Andreev   +7 more
doaj   +1 more source

Ichthyofauna from the lower devonian (lochkovian) deposits of the southwestern part of Belarus [PDF]

open access: yes, 2015
Приводятся результаты палеоихтиологического изучения керна скважины Томашовка 11, даны исторические сведения по изучению нижнедевонской ихтиофауны в пределах юго-западной части ...
Plax, D. P.
core  

Across species: A comparative perspective on red cell homeostasis and its influence on our understanding of human physiology and disease

open access: yesBritish Journal of Haematology, Volume 208, Issue 2, Page 446-458, February 2026.
This review highlights how studies on animal red cells have enriched our understanding of the behaviour of those from humans. A comparative perspective has enhanced our knowledge of human red cell pathophysiology Summary This review emphasises how studies on animal red cells have enriched our understanding of the behaviour of those from humans.
Kathleen M. Connolly   +5 more
wiley   +1 more source

Tweaking the structure to radically change the function: the evolution of transthyretin from 5-hydroxyisourate hydrolase to triiodothyronine distributor to thyroxine distributor.

open access: yesFrontiers in Endocrinology, 2015
Often, we elucidate evolutionary processes backwards, starting with eutherian mammals and gradually climbing down the evolutionary tree to those species who have survived since long before mammals evolved.
Samantha J. Richardson
doaj   +1 more source

Selection of the lamprey VLRC antigen receptor repertoire

open access: yes, 2014
The alternative adaptive immune system of jawless vertebrates is based on different isotypes of variable lymphocyte receptors (VLRs) that are composed of leucine-rich repeats (LRRs) and expressed by distinct B- and T-like lymphocyte lineages.
Aravind, L.   +9 more
core   +1 more source

Home - About - Disclaimer - Privacy