Results 21 to 30 of about 514 (133)

Spatial variation of larval ascaridoid nematode (Nematoda: Chromadorea: Ascaridoidea) infections in the Black Sea anchovy (Engraulis encrasicolus)

open access: yesTURKISH JOURNAL OF ZOOLOGY, 2021
This study evaluates the Black Sea anchovy population infected by parasitic Ascaridoid Nematode larva in the Southern Black Sea. It assesses the larva’s effect on fish body condition, energy stored in the body, and anchovy growth. For this, anchovies sampled on July 10–31, 2018, from 30 different stations were examined, and 11.8% of the 825 anchovies ...
Gizem AKKUŞ, Ali Cemal GÜCÜ
openaire   +2 more sources

An Overview of the Helminths of Moor Frog Rana arvalis Nilsson, 1842 (Amphibia: Anura) in the Volga Basin

open access: yesDiversity, 2021
This is the first review of the helminth fauna of the moor frog Rana arvalis Nilsson, 1842 from the Volga river basin (Russia). The article summarizes the authors’ and literature data on the helminthic fauna of this species.
Igor V. Chikhlyaev, Alexander B. Ruchin
doaj   +1 more source

Ecological Analysis and Biodiversity of the Helminth Community of the Pool Frog Pelophylax lessonae (Amphibia: Anura) from Floodplain and Forest Water Bodies

open access: yesDiversity, 2022
This work presents an ecological analysis of the community and biodiversity of helminths of Pelophylax lessonae (Camerano, 1882) from floodplain and forest reservoirs of the European part of Russia.
Igor V. Chikhlyaev, Alexander B. Ruchin
doaj   +1 more source

Distribution of ascaridoid nematodes (Nematoda: Chromadorea: Ascaridoidea) in fish from the Barents Sea

open access: yesOceanological and Hydrobiological Studies, 2018
Abstract The Ascaridoidea are parasites with heteroxenous life cycles. The study shows that fish can be paratenic, intermediate, or final hosts for parasites, and parasitic fauna reflects the feeding behavior of the hosts. Each species of parasites has also different environmental preferences and host specificity.
Katarzyna Najda   +4 more
openaire   +2 more sources

Molecular phylogeny of Chromadorea supports genus reclassification of Desmodorida and Microlaimida with the description of two new species from the Yellow Sea, China [PDF]

open access: yesZoosystematics and Evolution
Phylogenetic relationships within the marine Chromadorea are complex, and the taxonomic positions at the family and genus levels remain flexible due to discrepancies between morphological and molecular evidence.
Zhiyu Meng, Chunming Wang
doaj   +3 more sources

Gnathostoma spinigerum Mitochondrial Genome Sequence: a Novel Gene Arrangement and its Phylogenetic Position within the Class Chromadorea [PDF]

open access: yesScientific Reports, 2015
AbstractHuman gnathostomiasis is an emerging food-borne parasitic disease caused by nematodes in the genus Gnathostoma. In spite of their significance as pathogens, these parasites remain poorly understood at the molecular level. In the present study, we sequenced the mitochondrial (mt) genome of G. spinigerum, which infects a range of definitive hosts
Liu, Guo-Hua   +4 more
openaire   +3 more sources

Ocean acidification has a strong effect on communities living on plastic in mesocosms

open access: yesLimnology and Oceanography Letters, Volume 8, Issue 4, Page 675-684, August 2023., 2023
Abstract We conducted a mesocosm experiment to examine how ocean acidification (OA) affects communities of prokaryotes and eukaryotes growing on single‐use drinking bottles in subtropical eutrophic waters of the East China Sea. Based on 16S rDNA gene sequencing, simulated high CO2 significantly altered the prokaryotic community, with the relative ...
Xu Zhang   +20 more
wiley   +1 more source

Phylogenetic relationships of some spirurine nematodes (Nematoda: Chromadorea: Rhabditida: Spirurina) parasitic in fishes inferred from SSU rRNA gene sequences [PDF]

open access: yesFolia Parasitologica, 2011
Abstract: Small subunit rRNA sequences were obtained from 38 representatives mainly of the nematode orders Spirurida (Camallanidae, Cystidicolidae, Daniconematidae, Philometridae, Physalopteridae, Rhabdochonidae, Skrjabillanidae) and, in part, Ascaridida (Anisakidae, Cucullanidae, Quimperiidae).
Eva, Cernotíková   +2 more
openaire   +4 more sources

Groundwater environmental DNA metabarcoding reveals hidden diversity and reflects land‐use and geology

open access: yesMolecular Ecology, Volume 32, Issue 13, Page 3497-3512, July 2023., 2023
Abstract Despite being the most important source of liquid freshwater on the planet, groundwater is severely threatened by climate change, agriculture, or industrial mining. It is thus extensively monitored for pollutants and declines in quantity. The organisms living in groundwater, however, are rarely the target of surveillance programmes and little ...
Marjorie Couton   +4 more
wiley   +1 more source

The Mitochondrial Genome in Nematode Phylogenetics

open access: yesFrontiers in Ecology and Evolution, 2020
In recent decades, great strides have been made using various kinds of data including molecular sequences to clarify the phylogenetic relationships of nematodes.
Elizabeth M. A. Kern   +2 more
doaj   +1 more source

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