Results 41 to 50 of about 4,001 (195)

The Geonemertes problem (Nemertea) [PDF]

open access: yesJournal of Zoology, 1981
A new genus of monostiliferous hoplonemerteans, Pantinonemertes gen. nov., provides evidence for the separate evolution of terrestrial nemerteans. The genus is established for two new species found in Australia, P. enalios sp. nov., an intertidal form, and P. winsori sp.
Janet Moore, Ray Gibson
openaire   +1 more source

Transplants in annelids, nemerteans and planarians: a tool for embryology, immunology, endocrinology and regeneration research [PDF]

open access: yesInvertebrate Survival Journal, 2015
While transplantation procedures are often associated with biomedical applications, they are also an invaluable tool for basic research. This review focuses on how transplantation techniques have been used to understand the biology of three large ...
E E Zattara
doaj   +1 more source

Tetrodotoxins in Ribbon Worms Cephalothrix cf. simula and Kulikovia alborostrata from Peter the Great Bay, Sea of Japan

open access: yesToxins, 2022
Tetrodotoxin, an extremely potent low-molecular-weight neurotoxin, and its analogues (TTXs) are widely distributed in aquatic and terrestrial ecosystems. Most investigations concerning TTXs have been conducted mainly on puffer fish, octopus, and mollusks,
Anna E. Vlasenko, Timur Yu. Magarlamov
doaj   +1 more source

Tetrodotoxin and Its Analogues (TTXs) in the Food-Capture and Defense Organs of the Palaeonemertean Cephalothrix cf. simula

open access: yesToxins
Tetrodotoxin (TTX), an extremely potent low-molecular-weight neurotoxin, is widespread among marine animals including ribbon worms (Nemertea). Previously, studies on the highly toxic palaeonemertean Cephalothrix cf.
Grigorii V. Malykin   +2 more
doaj   +1 more source

Sampling effort to characterize estuarine macroinfaunal communities in patchy habitats

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract Estuarine benthic macroinfauna have aggregated, patchy distributions, making accurate community measurements dependent upon sampling scales. The purpose of this study is to determine the appropriate core sizes and sampling effort needed to characterize benthic infaunal communities in Corpus Christi Bay, Texas, USA.
Paul A. Montagna
wiley   +1 more source

An Overview of Hox Genes in Lophotrochozoa: Evolution and Functionality

open access: yesJournal of Developmental Biology, 2016
Hox genes are regulators of animal embryonic development. Changes in the number and sequence of Hox genes as well as in their expression patterns have been related to the evolution of the body plan.
Marco Barucca   +2 more
doaj   +1 more source

Collecting and Culturing Lineus sanguineus to Study Nemertea WBR.

open access: yesMethods Mol Biol, 2022
AbstractWhole-body regeneration, the ability to reconstruct complete individuals from small fragments, is rare among ribbon worms (phylum Nemertea) but present in the pilidiophoran species Lineus sanguineus. This species can regenerate complete individuals from a tiny midbody section, and even from a quarter of a piece, provided it retains a fragment ...
Zattara EE, Fernández-Alvarez FA.
europepmc   +5 more sources

Ecology of a North Sea pockmark with an active methane seep [PDF]

open access: yes, 1991
: At a large North Sea pockmark, with active methane seeps, surface sediments were found to have higher insoluble sulphide concentrations than sedlments from the surrounding area.
Austen, MC   +9 more
core   +1 more source

Evaluating and Advancing the Use of Shore‐Based Observers for Scientific Sampling and Catch Verification in High‐Volume Fisheries

open access: yesFisheries Management and Ecology, EarlyView.
ABSTRACT Shore‐based observers are increasingly being used in place of at‐sea observers to monitor and sample commercial fisheries catch. However, few evaluations assess whether these programs meet their stated goals or how to optimize them, and industry data are rarely tested for accuracy despite serving as the foundation for catch accounting. Using a
Christian Gredzens   +2 more
wiley   +1 more source

Translocating Intact Assemblages to Degraded Sites to Accelerate Ecological Recovery

open access: yesNew Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 1, March 2026.
Estuarine ecosystems are threatened by anthropogenic pressures such as climate change, coastal development, and increased nutrient and sediment inputs. These pressures are deteriorating ecological health and threatening the functioning and services that estuarine ecosystems provide.
Orlando Lam‐Gordillo   +3 more
wiley   +1 more source

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