scholarly journals Parasites of graylings (Thymallidae: Thymallus) from the northern continental coast of the Okhotsk Sea

2020 ◽  
Vol 200 (4) ◽  
pp. 965-977
Author(s):  
V. V. Pospekhov ◽  
G. I. Atrashkevich ◽  
O. M. Orlovskaya
Keyword(s):  
Parasitic Copepod ◽  
Northern Coast ◽  
Ecological Groups ◽  
Okhotsk Sea ◽  
Organoleptic Properties ◽  
Arctic Grayling ◽  
Marine Parasites ◽  
Veterinary Importance ◽  
First Time ◽  
High Diversity

For the first time, generalized data on parasites of two subspecies of arctic grayling (Thymallus arcticus pallasi and Th. a. mertensi) from the largest salmon rivers of the northern coast of the Okhotsk Sea, as the Taui, Yama and Gizhiga, are presented. In total, 39 species of parasites are found including 38 helminth species belonging to 26 genera, 19 families, 5 classes and 3 types (Plathelminthes, Nemathelminthes, and Acanthocephales), and 1 parasitic copepod (Crustacea; Arthropoda). Among the flatworms, trematodes have the highest species diversity — 19 species belonged to 8 genera of 6 families, and cestodes are presented by 6 species (6 genera of 5 families). Nematodes are presented by 8 species (8 genera of 5 families), and acanthocephalans — by 5 species (4 genera, 3 families, 2 classes). The graylings parasites are distributed with 2 ecological groups: the freshwater parasites including 29 species (4 cestodes, 16 trematodes, 5 nematodes, 3 acanthocephalans, and 1 copepod) and the marine parasites including 10 species (2 cestodes, 3 trematodes, 3 nematodes, and 2 acanthocephalans). Th. a. mertensi from the Taui River basin is distinguished by the highest diversity of parasites (32 species), their high diversity is observed for the same species from the Gizhiga (20 species), and for Th. a. pallasi from the Yama (24 species), as well. More than a half of helminths (22 species) are noted by medical and veterinary importance and/or are able to spoil organoleptic properties of the seafood.

scholarly journals NEMATODES OF GENUS PHILONEMA (PHILONEMIDAE) FROM SOCKEYE SALMON AND WHITESPOTTED CHAR FROM LAKE KISI (OLA RIVER BASIN, OKHOTSK SEA)

2019 ◽  
Vol 197 ◽  
pp. 194-207
Author(s):  
V. V. Pospekhov ◽  
K. V. Kusenko
Keyword(s):  
River Basin ◽  
Sockeye Salmon ◽  
Oncorhynchus Nerka ◽  
Nematode Species ◽  
Northern Coast ◽  
Okhotsk Sea ◽  
North East ◽  
Salvelinus Leucomaenis ◽  
First Time

Morphology of phylonems infesting whitespotted char Salvelinus leucomaenis and sockeye salmon Oncorhynchus nerka in Lake Kisi at the northern coast of the Okhotsk Sea is described for the first time. Sockeye was infected with adults of Philonema oncorhynchi Kuitunen-Ekbaum, 1933 and larvae of other nematode species (Philonema sp. II), and char — with adult dracunculoid nematode designated as Philonema sp. I. This Philonema sp. I differs considerably from Ph. oncorhynchi by number of reproductive papillae, their distribution, and structure of cuticular appendices on the caudal end of males. Larvae of Philonema sp. I (1st stage) and Philonema sp. II (3rd stage) are described, as well. These new data allow to reconsider the species belonging of nematodes infesting chars (Salvelinus) in North-East of Russia, which are identified now mostly as Ph. oncorhynchi.

scholarly journals Isolation, Characterization and Biotechnological Potentials of Thraustochytrids from Icelandic Waters

Marine Drugs ◽  
2019 ◽  
Vol 17 (8) ◽  
pp. 449 ◽  
Author(s):  
Magnús Örn Stefánsson ◽  
Sigurður Baldursson ◽  
Kristinn P. Magnússon ◽  
Arnheiður Eyþórsdóttir ◽  
Hjörleifur Einarsson
Keyword(s):  
Biodiesel Production ◽  
Human Consumption ◽  
Northern Coast ◽  
Omega 3 ◽  
Marine Oils ◽  
Media Formulation ◽  
Omega 6 ◽  
First Time ◽  
18S Rdna Sequence ◽  
Icelandic Waters

The following study reports on the first thraustochytrid isolates identified from Iceland. They were collected from three different locations off the northern coast of the country (Location A, Skagaströnd; Location B, Hveravík; and Location C, Eyjafjörður). Using 18S rDNA sequence analysis, isolates from Locations A and B were identified within the Thraustochytrium kinnei species while other isolates within the Sicyoidochytrium minutum species when compared to other known strains. Cells isolated from Locations A ( 2 . 10 ± 0 . 70 g/L) and B ( 1 . 54 ± 0 . 17 g/L) produced more biomass than the ones isolated from Location C ( 0 . 43 ± 0 . 02 g/L). This study offers the first-time examination of the utility of byproducts from fisheries as a nitrogen source in media formulation for thraustochytrids. Experiments showed that isolates produced more biomass (per unit of substrate) when cultured on nitrogen of marine ( 2 . 55 ± 0 . 74 g/L) as compared to of commercial origin (  1 . 06 ± 0 . 57 g/L). Glycerol ( 2 . 43 ± 0 . 56 g/L) was a better carbon source than glucose ( 1 . 84 ± 0 . 57 g/L) in growth studies. Fatty acid (FA) profiles showed that the isolates from Location C (S. minutum) had low ratios of monounsaturated ( 4 . 21 ± 2 . 96 % ) and omega-6 ( 0 . 68 ± 0 . 59 % ) FAs. However, the isolates also had high ratios of docosahexaenoic acid (DHA; 35 . 65 ± 1 . 73 % ) and total omega-3 FAs ( 40 . 39 ± 2 . 39 % ), indicating that they could serve as a source of marine oils for human consumption and in aquaculture feeds. The T. kinnei isolates from Location A could be used in biodiesel production due to their high ratios of monounsaturated ( 18 . 38 ± 6 . 27 % ) long chain ( 57 . 43 ± 8 . 27 % ) FAs.

scholarly journals Influences of the selected additives on the weight loss and organoleptic properties of marinated mussels and squids

2012 ◽  
Vol 81 (3) ◽  
pp. 263-267 ◽  
Author(s):  
Metin Guldas ◽  
Canan Hecer
Keyword(s):  
Weight Loss ◽  
Salt Content ◽  
Meat Products ◽  
Organoleptic Properties ◽  
Highest Weight ◽  
Konjac Flour ◽  
Weight Gains ◽  
Before And After ◽  
Mouth Feel ◽  
First Time

Effects of seven different solutions prepared from various additives (carrageenan, konjac flour, phosphate, yeast extract, xanthan gum and maltodextrin) were used to test for the first time in the marination of experimental seafood. The additives were added into the marination solutions and the samples were analyzed before and after marination. Statistically, the experimental solutions did not cause significant changes in pH, acidity and salt content of the samples (P < 0.05). The highest weight gains were obtained from the solution which contained 0.1% of konjac flour (E425 I) as 4.01, 5.21, 4.61 and 4.88 % in the mussels, big squids, diced squids and small squids, respectively. However, this solution was not preferred by the panellists because of its sticky texture. Inversely to red meat products, the solution containing phosphate caused weight loss during marination. The results indicate that the solution containing 0.2% carrageenan LM (low methoxyl) was the best solution in the marination process. Dipping into this solution caused weight gains of 4.69, 2.98, 4.04 and 2.78% in the big squids, the mussels, the small squids and the diced squids, respectively (P < 0.01). The organoleptic properties (mouth feel, flavour and softness) of mussels and squids were also improved by carrageenan LM addition.

New Results of Using the Light Trap for Collecting Beetles (Insecta: Coleoptera) in the Urban Environment (on the Example of Saratov)

2020 ◽  
Vol 2 (2) ◽  
pp. 72-78
Author(s):  
A.S. Sazhnev ◽  
◽  
V.V. Anikin ◽  
Keyword(s):  
Invasive Species ◽  
Urban Areas ◽  
Harmonia Axyridis ◽  
Low Cost ◽  
Light Trap ◽  
Ecological Groups ◽  
Light Traps ◽  
Adventitious Species ◽  
First Time ◽  
Stegobium Paniceum

The article presents the results of research of the using light traps (luminescent lamp Actinic 6W) for collecting Coleoptera in the Saratov city. Entomological material was collected by the second author in the period from 1.06 to 2.10.2019. In 2019, 52 species of Coleoptera of 22 families from different ecological groups were recorded. A relatively high proportion of adventitious species remains in 17.3– 30.7% of the presented fauna was presented. For two years the 14 species of alien and cryptogenic Coleoptera species were observed, that is 24.5% of the adventive fauna of the Saratov Province. Among invasive species Attagenus smirnovi, Stegobium paniceum, Atomaria lewisi, Harmonia axyridis, Gnatocerus cornutus, and Orchestes steppensis were record for the first time in 2019. It to use bringing on light as one of the available and low-cost ways to identify alien and cryptogenic organisms in urban areas is recommended.

The very first experience of biological analysis of water in Saint-Petersburg

2021 ◽  
pp. 124-130
Author(s):  
Nataliya B. Balashova ◽  
Grigorii A. Kiselev
Keyword(s):  
Quality Analysis ◽  
Northern Coast ◽  
Original Source ◽  
Saint Petersburg ◽  
Neva River ◽  
The Baltic ◽  
First Time ◽  
Heavily Polluted Area ◽  
The Gulf Of Finland ◽  
Neva Bay

The biological method of water quality analysis, for the first time, was applied in Russia during the examination of Neva Bay of the Gulf of Finland in the Baltic Sea by Wislouch S.M. Neva River was a source of drinking water in St. Petersburg and, at the same time, a discharge for all city drains. As a result, it became hazardous to health, being a source of various diseases, especially cholera. From August 1911 to September 1912 pollution studies of the Bay were made to solve the question - where to send the treated waste water of the future sewage system of St. Petersburg. In total, 37 trips were made during this time, 510 samples were taken, including 375 plankton samples and 35 benthic samples. Wysłouch S. M. gave an overview of objects collected at 265 stations located in the area of Neva Bay - from estuary of Bolshaya Neva to Kronstadt, along the southern coast of the Bay and partially along the Northern coast. He brought a list of algae, including 97 species: Algae Cyanophyceae (writing all taxa retained on original source) – 17 species, Flagellata – 19 species, Peridineae – 1, One – 30, Conjugatae – 2, Diatomaceae – 28 species, Fungi (1), Bacteria (17), Protozoa (28), Rotatoria (17). Taking into account the algae and other organisms saprobity indices, areas with different degrees of contamination were identified. All the data was put on map of the Gulf. The most heavily polluted area was the Sea channel, and the area between the Lisij Nos and Kronstadt was the cleanest.

scholarly journals ECOLOGICAL GROUPS OF WATER BEETLES (INSECTA, COLEOPTERA) OF THE FAMILY DYTISCIDAE IN THE TUVA REPUBLIC

2020 ◽  
Vol 3 (11(80)) ◽  
pp. 22-25
Author(s):  
Ch. Kuzhuget
Keyword(s):  
Flow Rate ◽  
Aquatic Environment ◽  
Ecological Groups ◽  
Water Beetles ◽  
The Family ◽  
Rivers And Lakes ◽  
Main Factors ◽  
First Time

In the basins of rivers and lakes of Tuva, 91 species of water beetles from the Dytiscidae family were found. All species from the Dytiscidae family were grouped into different ecological groups for the first time in Tuva Republic in relation to the main factors of the aquatic environment: flow rate, temperature, salinity and ground type.

scholarly journals ­Geometric morphometric analysis of snout shape in extant ruminants (Ungulata, Artiodactyla)

2013 ◽  
Author(s):  
Jonathan P. Tennant ◽  
Norman MacLeod
Keyword(s):  
Feeding Strategy ◽  
Functional Ecology ◽  
Intake Rate ◽  
Ecological Groups ◽  
Shape Variation ◽  
Geometric Morphometric ◽  
Ruminant Species ◽  
Under Sampling ◽  
Geometric Morphometric Analysis ◽  
First Time

Snout shape is a prominent aspect of herbivore feeding ecology, controlling both forage selectivity and intake rate. Many previous investigations have suggested that ruminant feeding classes can be discriminated via snout shape, with grazing and browsing species attributed ‘blunt’ and ‘pointed’ snouts respectively, with an intermediate sub-grouping. This aspect of functional ecology is analysed for the first time using a statistically rigorous geometry-based framework to compare the two-dimensional profiles of the premaxilla in ventral aspect for a large sample of ruminant species. Our results suggest that, when a sample of browsing and grazing ruminants are classified ecologically based on a range of independent indicators of their feeding strategy, they cannot be fully discriminated on the basis of their premaxilla profile shape. Instead, our sample forms a shape variation continuum with overlap between groupings, but with a 78 percent chance of successful categorisation. Moreover, previously used terminology such as ‘pointed’ and ‘blunt’ are largely inadequate for delimiting snout shape varieties, insofar as these terms lack the descriptive power to define the morphological disparity demonstrated. These results suggest that previous attempts to use snout shape as a proxy for feeding style in ruminants may have been biased due to under-sampling of this highly diverse group and to lack of geometric rigour in the assessment of shape data. Alternatively, conflicting or inadequate evidence in defining ‘browsers’ and ‘grazers’ could have caused incorrect assignment to ecological groups, distorting our analyses. The relation between snout shape and body mass are also documented.

scholarly journals Terrestrial Molluscs in the Dry Grasslands of the DNIPRO Upland (Central Ukraine): New Records, Rare Species and Conservation Potential

2018 ◽  
Vol 52 (1) ◽  
pp. 3-12 ◽  
Author(s):  
I. Balashov ◽  
O. Vasyliuk ◽  
D. Shyriaieva ◽  
Z. Shvydka ◽  
O. Oskyrko ◽  
...  
Keyword(s):  
Rare Species ◽  
New Records ◽  
National Level ◽  
Red List ◽  
The Other ◽  
Rock Outcrops ◽  
Dry Grassland ◽  
Dry Grasslands ◽  
First Time ◽  
High Diversity

Abstract Thirty-six species of terrestrial molluscs were found in the dry grasslands and rock outcrops of the study area, including three that were not previously known for Central Ukraine: Granaria frumentum, Pupilla bigranata and Mediterranea inopinata. These species are relics related to dry open habitats and require conservation in Ukraine on the national level, G. frumentum is already listed in the Red Book of Ukraine, and the other two should be listed in its next edition. It is proposed to create the new protected areas in the most important newly revealed locations of these species. These rocky areas also retain the high diversity of land molluscs in the region. The invasive snail Xeropicta derbentina was found for the first time on the DNIPRO Upland, on the edge of natural dry grassland. The rare native snail Morlina glabra was recorded for the first time in Kyiv Region, it is proposed to be included into the regional red list.

scholarly journals Algae and Cyanobacteria Diversity and Bioindication of Long-Term Changes in the Hula Nature Reserve, Israel

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 583
Author(s):  
Sophia Barinova ◽  
Alla Alster
Keyword(s):  
Water Quality ◽  
Species Richness ◽  
Nature Reserve ◽  
Eastern Mediterranean ◽  
Monitoring Program ◽  
Organic Pollution ◽  
Ecological Groups ◽  
International Importance ◽  
First Time ◽  
Lake Hula

Lake Hula, the core of one of the most extensive wetland complexes in the Eastern Mediterranean, was drained in 1951–1958. However, about 350 hectares of papyrus marshes were allocated in the southwestern part of the previous lake and became the Hula Nature Reserve status, the first of two wetlands in Israel included in the Ramsar List of Wetlands of International Importance. The list of algae and cyanobacteria species of Lake Hula was compiled by us for the first time based on data from publications of 1938–1958, as well as our research in the Hula Nature Reserve, obtained within the framework of the monitoring program for 2007–2013. The list includes 225 species and intraspecies of algae and cyanobacteria belonging to eight phyla. The dynamics of the species richness of algae and cyanobacteria flora for 1938–2013 are shown. Species-bioindicators of water quality have been identified, and the change in their composition by ecological groups for a period of about a hundred years has been shown. Based on the species richness of algae communities, water quality indices were calculated with particular attention to changes in trophic status during the study period. The algae flora of Lake Hula and Hula Nature Reserve was found to be similar, but bioindication has revealed an increase in salinity and organic pollution in recent years.

scholarly journals A Novel Genotype and First Record of Trypanosoma lainsoni in Argentina

Pathogens ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 731
Author(s):  
Anahí G. Díaz ◽  
Paula G. Ragone ◽  
Fanny Rusman ◽  
Noelia Floridia-Yapur ◽  
Rubén M. Barquez ◽  
...  
Keyword(s):  
Host Range ◽  
First Record ◽  
Morphological Characterization ◽  
Pairwise Identity ◽  
Wild Mammals ◽  
Transmission Electron ◽  
Chaco Region ◽  
Veterinary Importance ◽  
First Time

Trypanosomes are a group of parasitic flagellates with medical and veterinary importance. Despite many species having been described in this genus, little is known about many of them. Here, we report a genetic and morphological characterization of trypanosomatids isolated from wild mammals from the Argentine Chaco region. Parasites were morphologically and ultrastructurally characterized by light microscopy and transmission electron microscopy. Additionally, 18s rRNA and gGAPDH genes were sequenced and analyzed using maximum likelihood and Bayesian inference. Morphological characterization showed clear characteristics associated with the Trypanosoma genus. The genetic characterization demonstrates that the studied isolates have identical sequences and a pairwise identity of 99% with Trypanosoma lainsoni, which belongs to the clade of lizards and snakes/rodents and marsupials. To date, this species had only been found in the Amazon region. Our finding represents the second report of T. lainsoni and the first record for the Chaco region. Furthermore, we ultrastructurally described for the first time the species. Finally, the host range of T. lainsoni was expanded (Leopardus geoffroyi, Carenivora, Felidae; and Calomys sp., Rodentia, Cricetidae), showing a wide host range for this species.

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