Results 21 to 30 of about 352,814 (314)

Protomelas krampus, a new paedophagous cichlid from Lake Malawi (Teleostei, Cichlidae)

open access: yesEuropean Journal of Taxonomy, 2020
A new paedophagous species of Protomelas, P. krampus sp. nov., is described from Lake Malawi. It has been found in Lukoma Bay in Tanzania, near Mara Point in Mozambique, and at Otter Point, Chizumulu, the Likoma Islands and Mazinzi Reef in Malawi.
Katrien Dierickx, Jos Snoeks
doaj   +1 more source

Flexibility within the middle ears of vertebrates [PDF]

open access: yes, 2013
Introduction and aims: Tympanic middle ears have evolved multiple times independently among vertebrates, and share common features. We review flexibility within tympanic middle ears and consider its physiological and clinical implications.
Mason, Matthew J.   +3 more
core   +1 more source

Revisiting the Baltimore–Bullock's Oriole hybrid zone reveals changing plumage colour in Bullock's Orioles

open access: yesRoyal Society Open Science, 2022
Hybrid zones are dynamic areas where populations of two or more interbreeding species may change through an influx of novel genetic material resulting from hybridization or selection on standing genetic variation.
Young Ha Suh   +2 more
doaj   +1 more source

Tubbataha Reefs Natural Park: the first comprehensive elasmobranch assessment reveals global hotspot for reef sharks

open access: yesJournal of Asia-Pacific Biodiversity, 2019
Elasmobranchs are experiencing population declines worldwide because of anthropogenic stressors. Marine protected areas (MPAs) have been shown to benefit mesopredatory species of shark.
Ryan Murray   +7 more
doaj   +1 more source

The evolutionary development of the renin angiotensin aldosterone system and its importance for the survival of the human species

open access: yesArterial Hypertension, 2021
Kidneys produce a number of substances that affect intrarenal blood circulation; however, the key system that regulates blood flow in both general and local circulation (including the renal circulation) is the renin-angiotensinaldosterone system (RAAS ...
Natalia Butt-Hussaim, Jacek Manitius
doaj   +1 more source

Vertebrate innovations [PDF]

open access: yesProceedings of the National Academy of Sciences, 2000
Vertebrate innovations include neural crest cells and their derivatives, neurogenic placodes, an elaborate segmented brain, endoskeleton, and an increase in the number of genes in the genome. Comparative molecular and developmental data give new insights into the evolutionary origins of these characteristics and the complexity of the vertebrate ...
Shimeld, S, Holland, P
openaire   +3 more sources

The Medical versus Zoological Concept of Outflow Tract Valves of the Vertebrate Heart

open access: yesJournal of Cardiovascular Development and Disease, 2022
The anatomical elements that in humans prevent blood backflow from the aorta and pulmonary artery to the left and right ventriclesare the aortic and pulmonary valves, respectively.
Valentín Sans-Coma   +7 more
doaj   +1 more source

Standardized mounting method of (zebrafish) embryos using a 3D-printed stamp for high-content, semi-automated confocal imaging

open access: yesBMC Biotechnology, 2019
Background Developmental biology relies to a large extent on the observation and comparison of phenotypic traits through time using high resolution microscopes.
David Simon Kleinhans, Virginie Lecaudey
doaj   +1 more source

Dynamic evolution of transient receptor potential vanilloid (TRPV) ion channel family with numerous gene duplications and losses

open access: yesFrontiers in Endocrinology, 2022
The transient receptor potential vanilloid (TRPV) ion channel family is involved in multiple sensory and physiological functions including thermosensing and temperature-dependent neuroendocrine regulation.
Marina Morini   +5 more
doaj   +1 more source

Identifying and characterizing a novel protein kinase STK35L1 and deciphering its orthologs and close-homologs in vertebrates. [PDF]

open access: yes, 2009
The human kinome containing 478 eukaryotic protein kinases has over 100 uncharacterized kinases with unknown substrates and biological functions. The Ser/Thr kinase 35 (STK35, Clik1) is a member of the NKF 4 (New Kinase Family 4) in the kinome with ...
Pankaj Goyal   +11 more
core   +1 more source

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