Results 31 to 40 of about 1,937 (200)

The sex lives of ctenophores: the influence of light, body size, and self-fertilization on the reproductive output of the sea walnut, Mnemiopsis leidyi [PDF]

open access: yesPeerJ, 2016
Ctenophores (comb jellies) are emerging as important animals for investigating fundamental questions across numerous branches of biology (e.g., evodevo, neuroscience and biogeography).
Daniel A. Sasson, Joseph F. Ryan
doaj   +2 more sources

Regulation and Regeneration in the Ctenophore Mnemiopsis leidyi

open access: yesDevelopmental Biology, 2000
Lobate ctenophores (tentaculates) generally exhibit a remarkable ability to regenerate missing structures as adults. On the other hand, their embryos exhibit a highly mosaic behavior when cut into halves or when specific cells are ablated. These deficient embryos do not exhibit embryonic regulation, and generate incomplete adult body plans.
Henry, Jonathan Q., Martindale, Mark Q.
openaire   +2 more sources

Developmental expression of “germline”- and “sex determination”-related genes in the ctenophore Mnemiopsis leidyi

open access: yesEvoDevo, 2016
Background An essential developmental pathway in sexually reproducing animals is the specification of germ cells and the differentiation of mature gametes, sperm and oocytes. The “germline” genes vasa, nanos and piwi are commonly identified in primordial
Adam M. Reitzel   +2 more
doaj   +1 more source

Stable Laboratory Culture System for the Ctenophore Mnemiopsis leidyi. [PDF]

open access: yesMethods Mol Biol
Ctenophores are marine organisms attracting significant attention from evolutionary biology, molecular biology, and ecological research. Here, we describe an easy and affordable setup to maintain a stable culture of the ctenophore Mnemiopsis leidyi. The challenging delicacy of the lobate ctenophores can be met by monitoring the water quality, providing
Soto-Angel JJ   +5 more
europepmc   +4 more sources

LUMINESCENCE IN MNEMIOPSIS [PDF]

open access: yesJournal of General Physiology, 1924
1. In the dark adapted Mnemiopsis, mechanical stimulation causes luminescence along the eight rows of paddle plates. The tactile receptors for this reaction lie only in the paddle plate rows, and are connected only longitudinally along these rows. 2.
openaire   +2 more sources

Response of Mnemiopsis leidyi larvae to light intensity changes

open access: yes, 2020
A possible response to light of larvae of Black Sea ctenophore Mnemiopsis leidyi of two age groups (first to fourth day and one-two weeks after hatching) was experimentally studied. The larvae were placed in a Petri dish with seawater, in which two areas
Баяндина, Ю. С.
core   +1 more source

Monitoring of the abundance of the invasive Ctenophoro Mnemiopsis leidyi A. Agassiz, 1865, in relation to small-scale artisanal fishing in the Lagoon of Venice [PDF]

open access: yes, 2022
openDati da diverse aree geografiche hanno mostrato come la specie invasiva di ctenoforo Mnemiopsis leidyi abbia un impatto sugli ecosistemi e sulla pesca.
PAGANIN, MARTA
core  

A historical data on the seasonal density variation of phytoplankton, zooplankton and Mnemiopsis leidyi in the South Caspian Sea [PDF]

open access: yesCaspian Journal of Environmental Sciences, 2022
The seasonal variation of phytoplankton, zooplankton (holoplankton) and ctenophore (Mnemiopsis leidyi) were investigated at eight transects from east to west in the South Caspian Sea. In spring (May), the most abundance of zooplankton was observed in the
M. Rowshan Tabari   +4 more
doaj   +1 more source

Still Enigmatic: Innate Immunity in the Ctenophore Mnemiopsis leidyi [PDF]

open access: yesIntegrative and Comparative Biology, 2019
Abstract Innate immunity is an ancient physiological response critical for protecting metazoans from invading pathogens. It is the primary pathogen defense mechanism among invertebrates. While innate immunity has been studied extensively in diverse invertebrate taxa, including mollusks, crustaceans, and cnidarians, this system has not ...
Nikki Traylor-Knowles   +2 more
openaire   +2 more sources

Causes of plankton diminishing in the Middle and South Caspian nowadays

open access: yesЮг России: экология, развитие, 2015
There is shown that degradation of plankton is a result of influence of both biotic (mnemiopsis) and abiotic (concentration of mineral nitrogen) factors in the ecosystem of the Middle and South Caspian.
G. M. Abdurakhmanov   +2 more
doaj   +1 more source

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