Results 11 to 20 of about 6,618 (168)

The Pharmacological Potential of Nonribosomal Peptides from Marine Sponge and Tunicates [PDF]

open access: yesFrontiers in Pharmacology, 2016
Marine biodiversity is recognized by a wide and unique array of fascinating structures. The complex associations of marine microorganisms, especially with sponges, bryozoans, and tunicates, make it extremely difficult to define the biosynthetic source of
Shivankar Agrawal   +2 more
doaj   +2 more sources

A phylogenomic framework and timescale for comparative studies of tunicates

open access: yesBMC Biology, 2018
Background Tunicates are the closest relatives of vertebrates and are widely used as models to study the evolutionary developmental biology of chordates. Their phylogeny, however, remains poorly understood, and to date, only the 18S rRNA nuclear gene and
Frédéric Delsuc   +9 more
doaj   +2 more sources

Serotonin system in tunicates: insight from morphological and molecular approaches [PDF]

open access: yesFrontiers in Ecology and Evolution
Serotonin (5 hydroxytryptamine, 5-HT) is a biogenic amine of ancient origin that is widespread among animals. It plays multiple roles during development and in adults as neurotransmitter at synaptic level and neuro hormone controlling complex behaviors ...
Roberta Pennati   +3 more
doaj   +2 more sources

Sensory cells in tunicates: insights into mechanoreceptor evolution [PDF]

open access: yesFrontiers in Cell and Developmental Biology
Tunicates, the sister group of vertebrates, offer a unique perspective for evolutionary developmental studies (Evo-Devo) due to their simple anatomical organization.
Chiara Anselmi   +6 more
doaj   +3 more sources

Aquatic Invasions! A Menace to the West : Colonial Tunicates Species Guide

open access: yes
What ancient animal in modern times has a primitave spinal cord that may resemble the first vertebrates on earth, spends most of its life stuck to a boat or rock, produces an exoskeleton made of cellulose and is more associated with plants than animals ...
Siemens, Tania
core   +6 more sources

The planktonic food web in the Gulf of Naples based on the analysis of carbon and nitrogen stable isotope ratios

open access: yesMarine Ecology, EarlyView., 2023
Abstract Plankton play a key role in marine food webs by producing and transferring organic matter and energy to higher trophic levels. To define the trophic structure and interactions within the planktonic communities in the Gulf of Naples, we determined carbon and nitrogen stable isotope ratios in particulate organic matter (POM, <20 μm ...
Louise Merquiol   +2 more
wiley   +1 more source

Behavioural Responses of the Colonial Sea Squirt Botrylloides violaceus Oka to Suspended Food Micro-Particles in Laboratory Cultures

open access: yesJournal of Marine Science and Engineering, 2020
Violet sea squirts are noteworthy model organisms, because they provide insights into various physiologic processes, including cell senescence, ageing, apoptosis and allorecognition. Consequently, their culture is critical to permit experimental studies.
Chiara Gregorin   +3 more
doaj   +1 more source

A mid-Cambrian tunicate and the deep origin of the ascidiacean body plan

open access: yesNature Communications, 2023
Tunicates are an evolutionarily significant subphylum of marine chordates, with their phylogenetic position as the sister-group to Vertebrata making them key to unraveling our own deep time origin.
Karma Nanglu   +3 more
doaj   +1 more source

Can stand the heat – ecology of the potentially invasive ascidian Styela plicata along the Mediterranean coast of Israel

open access: yesFrontiers in Marine Science, 2023
IntroductionBoth colonial and solitary ascidians (Chordata, Ascidiacea) have been gathering attention due to their impact on coastal environments. The solitary ascidian Styela plicata was first observed along the coast of Israel in 2014. It is considered
Raz Platin, Noa Shenkar, Noa Shenkar
doaj   +1 more source

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