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Chereshnev, I. A.; Shestakov, A. V.; Фролов, С. В.

doi:10.1023/a:1012500630605

Cited by 11 publications

(3 citation statements)

References 1 publication

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“…In the European part of Russia, it is most abundant in the basins of the Pechora and the Northern Dvina rivers. Stenodus leucichthys nelma from Lake Kuben is genetically related to the population of Northern Dvina (Chereshnev et al, 2002). Since the natural habitats are destroyed and water is increasingly polluted, it is necessary to deepen our knowledge of S. leucichthys nelma biology and rearing both for its conservation and use in aquaculture.…”

Section: Introductionmentioning

confidence: 99%

The development of the digestive system and the fate of the yolk syncytial layer in postembryogenesis of Stenodus leucichthys nelma (Teleostei)

Kondakova

Bogdanova

Ottesen

et al. 2023

Journal of Morphology

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Stenodus leucichthys nelma is an economically important species for cold‐water aquaculture. Unlike other Coregoninae, S. leucichthys nelma is a piscivore. Here, we describe in detail the development of the digestive system and the yolk syncytial layer from hatching to early juvenile stage using histological and histochemical methods to determine their common and specific characteristics and to test the hypothesis that the digestive system of S. leucichthys nelma rapidly acquires adult features. The digestive tract differentiates at hatching and starts to function before the transition to mixed feeding. The mouth and anus are open, mucous cells and taste buds are present in the buccopharyngeal cavity and esophagus, pharyngeal teeth have erupted, the stomach primordium is seen, the intestinal epithelium with mucous cells is folded and the intestinal valve is observed; the epithelial cells of the postvalvular intestine contain supranuclear vacuoles. The liver blood vessels are filled with blood. The cells of exocrine pancreas are loaded with zymogen granules, and at least two islets of Langerhans are present. However, the larvae remain dependent on maternal yolk and lipids for a long time. The adult features of the digestive system develop gradually, the most significant changes take place approximately from 31 to 42 days posthatching. Then, the gastric glands and pyloric caeca buds appear, the U‐shaped stomach with glandular and aglandular regions develops, the swim bladder inflates, the number of islets of Langerhans increases, the pancreas becomes scattered, and the yolk syncytial layer undergoes programmed death during the larval‐to‐juvenile transition. During postembryonic development, the mucous cells of the digestive system contain neutral mucosubstances.

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Section: Introductionmentioning

confidence: 99%

The development of the digestive system and the fate of the yolk syncytial layer in postembryogenesis of Stenodus leucichthys nelma (Teleostei)

Kondakova

Bogdanova

Ottesen

et al. 2023

Journal of Morphology

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“…Due to a rigid 2-year life cycle, generations of this sh species spawning in odd and in even years represent two reproductively isolated lineages. The native range of the pink salmon encompasses most of the North Paci c with the adjacent Arctic Ocean waters and rivers in their watersheds (Heard 1991;Babaluk et al 2000Chereshnev et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Parasites of invasive pink salmon, Oncorhynchus gorbuscha (Walbaum, 1792) (Actinopterygii: Salmonidae), in the Kandalaksha Bay of the White Sea

Sokolov,

Ieshko,

Gordeeva

et al. 2023

Polar Biol

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Pink salmon, Oncorhynchus gorbuscha (Walbaum, 1792), a native of the North Paci c Ocean, is an invasive sh species rapidly expanding in the North Atlantic, the adjacent waters of the Arctic Ocean, and rivers in their watersheds. We investigated the species composition of parasites and the structure of parasite communities of the introduced pink salmon in Kandalaksha Bay of the White Sea in 2021. The parasites were identi ed using morphological and genetic methods. A total of 14 parasite species were recorded. The core species of the parasitic fauna of the introduced pink salmon in the Kandalaksha Bay were Clistobothrium montaukense Ruhnke, 1993, Diphyllobothriumʼ spp., Scolex polymorphus (plerocercoids), Brachyphallus crenatus (Rudolphi, 1802), Derogenes varicus (Müller, 1784), Lecithaster salmonis Yamaguti, 1934 (adults), Anisakis simplex (Rudolphi, 1809) sensu stricto (juvenile III) and Hysterothylacium aduncum (Rudolphi, 1802) (juveniles III and IV). Plerocercoids of C. montaukense were rst detected in sh from the polar waters of the Northern Hemisphere. We provided the rst evidence that the Paci c genetic lineage of A. simplex sensu stricto occurs in European marine waters. In 2021, there was a noticeable increase in the mean abundance of the third-stage juveniles of Anisakis in the White Sea pink salmon compared to the period of 1990s-early 2000s. We conclude that the pink salmon occupies the same trophic niche in the new region of its introduction as in the native range.

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“…It was found that extremely intensive educational process in conditions of half-year increased motor functioning causes changes in bloodstream system mainly at level of tendency [6,7,9]. Besides, we registered physiological changes in decrease of quantity of students with bloodstream disorders, with hyper-kinetic blood circulation type, with negative reactions to orthostatic test [8].…”

Section: Introductionmentioning

confidence: 99%

Assessment of educational process regional factors’ and tension influence on students’ bloodstream system and homeostasis vegetative characteristics

Gajnullin¹,

Исаев²,

Korableva³

2016

PES

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Abstract. Purpose: to study influence of regional factors and intensive educational process on cardio-haemodynamic and vegetative characteristics in conditions of individual differentiated classes. Material: in the research 80 student (of 17-18 years' age) participated; they were divided into group of the tested (n=40) and group of comparison (n=40). Results: we showed physiological influence on bloodstream regulation and weakening of activity in conditions of individual-differentiated classes. The content of programs of informational, sports-health related, physical culture and prophylaxis measures resulted in students' different speed characteristics (in bloodstream links and in its regulation). In conditions of annual educational process the students had balance of sympathetic and para-sympathetic regulation of central and periphery bloodstream. It depends on weather factors of year seasons, on examination sessions. Conclusions: in conditions of educational process adaptationcompensatory shifts are conditioned by dominating segmental regulation with participation of bloodstream links and regulatory supra-segmental influences. We also observed manifestation of influence of separate autonomous regulation factors.

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Untitled

Cited by 11 publications

References 1 publication

The development of the digestive system and the fate of the yolk syncytial layer in postembryogenesis of Stenodus leucichthys nelma (Teleostei)

The development of the digestive system and the fate of the yolk syncytial layer in postembryogenesis of Stenodus leucichthys nelma (Teleostei)

Parasites of invasive pink salmon, Oncorhynchus gorbuscha (Walbaum, 1792) (Actinopterygii: Salmonidae), in the Kandalaksha Bay of the White Sea

Assessment of educational process regional factors’ and tension influence on students’ bloodstream system and homeostasis vegetative characteristics

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