Results 21 to 30 of about 7,461 (202)

Morphology-based taxonomic re-assessment of the Arctic lamprey, Lethenteron camtschaticum (Tilesius, 1811) and taxonomic position of other members of the genus [PDF]

open access: yesZooKeys, 2020
The lamprey genus Lethenteron Creaser & Hubbs, 1922 is widespread across Eurasia and North America, but the number and distribution of its constituent species is not firmly established. After a morphological examination of extant type material of
Alexander M. Naseka, Claude B. Renaud
doaj   +3 more sources

Cambrian origin of the CYP27C1-mediated vitamin A1-to-A2 switch, a key mechanism of vertebrate sensory plasticity [PDF]

open access: yesRoyal Society Open Science, 2017
The spectral composition of ambient light varies across both space and time. Many species of jawed vertebrates adapt to this variation by tuning the sensitivity of their photoreceptors via the expression of CYP27C1, an enzyme that converts vitamin A1 ...
Ala Morshedian   +8 more
doaj   +1 more source

Shedding light on the river and sea lamprey in western European marine waters

open access: yesEndangered Species Research, 2021
Lampreys are ancestral jawless vertebrates with particularly complex life histories. Population declines resulting from increased anthropogenic pressure have been observed. For semelparous diadromous lampreys, the marine phase remains largely a black box,
SAM Elliott   +5 more
doaj   +1 more source

Genetic models reveal historical patterns of sea lamprey population fluctuations within Lake Champlain [PDF]

open access: yesPeerJ, 2015
The origin of sea lamprey (Petromyzon marinus) in Lake Champlain has been heavily debated over the past decade. Given the lack of historical documentation, two competing hypotheses have emerged in the literature.
Cassidy C. D’Aloia   +4 more
doaj   +2 more sources

THE HEMOGLOBIN OF THE SEA LAMPREY, PETROMYZON MARINUS [PDF]

open access: yesJournal of General Physiology, 1951
The blood hemoglobin of the sea lamprey presents a curious mixture of primitive and highly specialized properties. Like muscle hemoglobin, it has a molecular weight of about 17,000, and apparently contains a single heme. Its isoelectric point is like that of a typical invertebrate hemoglobin.
G, WALD, A, RIGGS
openaire   +2 more sources

Assessment of sea lamprey (Petromyzon marinus) diet using DNA metabarcoding of feces

open access: yesEcological Indicators, 2021
Sea lamprey (Petromyzon marinus) are invasive in the Laurentian Great Lakes, parasitize large-bodied fishes, and therefore are the focus of an international control program.
Nicholas S. Johnson   +2 more
doaj   +1 more source

Demography of sea lamprey (Petromyzon marinus) ammocoete populations in relation to potential spawning-migration obstructions [PDF]

open access: yes, 2017
Copyright © 2017 John Wiley & Sons, Ltd. Recent advances in the understanding of lamprey migrations have led to concerns over the impacts of obstructions on the demography of many species. This study investigated sea lamprey (Petromyzon marinus) larvae
Bolland, J. D.   +5 more
core   +1 more source

The evolution and variety of RFamide-type neuropeptides: insights from deuterostomian invertebrates [PDF]

open access: yes, 2014
Five families of neuropeptides that have a C-terminal RFamide motif have been identified in vertebrates: (1) gonadotropin-inhibitory hormone (GnIH), (2) neuropeptide FF (NPFF), (3) pyroglutamylated RFamide peptide (QRFP), (4) prolactin-releasing peptide (
Elphick, MR, Mirabeau, O
core   +1 more source

The Return of \u3ci\u3eHexagenia\u3c/i\u3e (Ephemeroptera: Ephemeridae) to the Lower Fox River, Wisconsin [PDF]

open access: yes, 2017
Burrowing mayflies (Hexagenia bilineata) were collected in 1991 in the vicinity of the DePere dam on the Fox River, Brown County, Wisconsin. Because Hexagenia mayflies are indicators of good water quality, their emergence from the Fox River is evidence ...
Cochran, Phillip A
core   +2 more sources

The Nuclear DNA Content and Genetic Diversity of Lampetra morii.

open access: yesPLoS ONE, 2016
We investigated the nuclear DNA content and genetic diversity of a river lamprey, the Korean lamprey Lampetra morii, which is distributed in the northeast of China. L.
Xinyu Yan   +5 more
doaj   +1 more source

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