scholarly journals Physical and geographical characteristics and ichthyofauna of local reservoirs of the East Kazakhstan region

2021 ◽  
Vol 2 ◽  
pp. 18-27
Author(s):  
A. Kasymkhanov
Keyword(s):  
Sex Ratio ◽  
Species Composition ◽  
Fish Species ◽  
Research Work ◽  
Commercial Fish ◽  
City Administration ◽  
East Kazakhstan ◽  
The City ◽  
Geographical Characteristics ◽  
Local Significance

The article presents the results of research work carried out in 2020 on the reservoirs of local significance of the East Kazakhstan region. Research works were carried out on the lakes Saryolen, Arasan and Batyrkhankol of the Kurchum district; the reservoir on the Kandysu River in the Tarbagatai district; reservoirs No. 2 and No. 3 on the Ulan River in the Ulan district; Lake Alimba on the territory of the city administration of Semey; Lake Dolonskoye in the Beskaragai district of the East Kazakhstan region. The physical and geographical characteristics of the studied reservoirs are described. The species composition of the ichthyofauna of reservoirs of local significance in the East Kazakhstan region is presented. The biological analysis of commercial fish species by age, length, weight, Fulton fatness coefficient, and sex ratio is also carried out. The results of the research work are summed up.

Fish species composition, sex ratio and growth parameters in Saghamo Lake (Southern Georgia)

Biologia ◽  
2018 ◽  
Vol 73 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Tatia Kuljanishvili ◽  
Levan Mumladze ◽  
Lukáš Kalous ◽  
Bella Japoshvili
Keyword(s):  
Sex Ratio ◽  
Species Composition ◽  
Fish Species ◽  
Growth Parameters ◽  
Fish Species Composition ◽  
Southern Georgia

scholarly journals HISTORICAL APPROACH OF THE FISH SPECIES COMPOSITION IN ARROYO MORENO, VERACRUZ, MEXICO

2019 ◽  
Vol 12 (45-48) ◽  
Author(s):  
Adriana Marisol García-Villar ◽  
Jesús Montoya-Mendoza ◽  
Rafael Chávez-López
Keyword(s):  
Species Composition ◽  
Fish Species ◽  
Anthropogenic Activities ◽  
Ecological Guilds ◽  
Commercial Fish ◽  
Estuarine Habitat ◽  
Natural Reserve ◽  
Fish Species Composition ◽  
Del Rio ◽  
Local Fisherman

<p>Arroyo Moreno (AM) is an estuarine water flow located between Boca del Río and Medellin municipalities from Veracruz State; although this estuarine habitat is situated in a state natural reserve, their environmental conditions had been altered in last decades by anthropogenic activities, which had caused changes on biotic communities including fishes. The aim of this contribution was to describe the temporal variation of fish species composition from Arroyo Moreno; an updated list of fish species was compiled for this estuarine channel, this list was made with ethnographic information provided by local fisherman using surveys, fish species catalogues, previous publications and complemented with cast net samplings. Sixty-two fish species were recorded, of these 18 were collected directly for us, another 41 species were identified by surveyed fishermen; the most abundant ecological guilds were marine temporary, freshwater temporary, and marine migrant species. With the historical fishermen’s information was inferred than both fish species richness, abundance and size had diminished noticeably in commercial fish species mainly, this outcome was related by the fishermen to the use of estuarine channel as drainage attributed to urban development in the zone.</p>

scholarly journals ICHTHYOFAUNA OF THE LAKE ZERENDINSKOE SNNP «KOKSHETAU»

2021 ◽  
Vol 6 (8(58)) ◽  
pp. 3-8
Author(s):  
Zh. Kurzhikaev ◽  
A.S. Assylbekova ◽  
G.K. Barinova
Keyword(s):  
Sex Ratio ◽  
Fish Species ◽  
Biological Indicators ◽  
The State ◽  
Biological Parameters ◽  
Commercial Fish ◽  
Age Range

This article presents the results of studies of the ichthyofauna of Lake Zerendinskoe in 2020. The ichthyofauna of Lake Zerendinskoe is represented by 7 commercial fish species. The age range of the studied species varied from 2+ to 9+. The biological parameters of bream, carp, common pike, whitefish and common perch varied within the average limits. According to the biological indicators of roach, there is a slightly slowed growth. When studying the sex ratio, there is a predominance of females. The state of the ichthyofauna is considered stable and it is recommended to conduct both sports and amateur, and reclamation fishing, and fishing for reproductive purposes.

THE NUMBER AND QUALITATIVE CHARACTERISTICS OF FRY FISH IN SHALLOW COASTAL WATERS OF THE VOLGA IN THE SUMMER-AUTUMN PERIOD OF 2012

2017 ◽  
pp. 65-73
Author(s):  
Edward Vladimirovich Nikitin
Keyword(s):  
Fish Species ◽  
Coastal Waters ◽  
Caspian Sea ◽  
The Caspian Sea ◽  
Volga River ◽  
Commercial Fish ◽  
Autumn Period ◽  
Fish Juveniles ◽  
Qualitative Characteristics ◽  
Shallow Coastal Waters

Shallow coastal waters of the Volga river is a flooded feeding area for fish juveniles of nonmigratory fish species. There takes place annual downstream migration of fluvial anadromous fish species from spawning grounds of the Volga river to the Northern Caspian Sea. The most important factors determining the number and qualitative characteristics of fry fishes are the level of the Caspian Sea (currently having a tendency to the lowering), hydrological and thermal regimes of the Volga river. Researches were carried out in definite periods of time. In the summer-autumn period of 2012 fry fishes were presented by 19 species (13 of them were commercial species), which belonged to 9 families. The article gives data on all the commercial fish species. In the first decade of July the maximum number of fry fish was registered in the western part of the Volga outfall offshore - in box 247 (19.86 mln specimens/km2), in the eastern part - in box 142 (20.4 mln specimens/km2). The most populous were roach, red-eye, silver bream and bream; size-weight characteristics were better in the areas remoted from the Volga delta. In the third decade of July the quantitative indicators of fry fish on these areas decreased, size-weight characteristics greatly increased. In the second decade of October in the western part of the seaside there were registered increased pre-wintering concentrations of fish juveniles, their qualitative indicators increased, which is evidence to favorable feeding conditions in 2012.

scholarly journals The Use of GIS Technology to Optimize COVID-19 Vaccine Distribution: A Case Study of the City of Warsaw, Poland

2021 ◽  
Vol 18 (11) ◽  
pp. 5636
Author(s):  
Sylwia Krzysztofowicz ◽  
Katarzyna Osińska-Skotak
Keyword(s):  
Herd Immunity ◽  
Research Work ◽  
Age Groups ◽  
Group Living ◽  
Population Group ◽  
Gis Technology ◽  
Vaccination Site ◽  
Global Challenge ◽  
Vaccine Distribution ◽  
The City

The COVID-19 pandemic is a global challenge, and the key to tackling it is vaccinating a specified percentage of the population to acquire herd immunity. The observed problems with the efficiency of the vaccination campaigns in numerous countries around the world, as well as the approach used at the initial stage of the National Immunization Program in Poland, prompted us to analyse the possibility of using GIS technology to optimize the distribution of vaccines to vaccination sites so as to minimize the period needed to vaccinate individual population groups. The research work was carried out on the example of Warsaw, the capital of Poland and the city with the largest population in the country. The analyses were carried out for the 60–70 and 50–60 age groups, in various approaches and for vaccines of different companies (Moderna, BioNTech, AstraZeneca), used to vaccinate people in Poland. The proposed approach to optimize vaccine distribution uses Thiessen’s tessellation to obtain information on the number of people in a given population group living in the area of each vaccination site, and then to estimate the time needed to vaccinate that group. Compared to the originally used vaccination scenario with limited availability of vaccines, the proposed approach allows practitioners to design fast and efficient distribution scenarios. With the developed methodology, we demonstrated ways to achieve uniform vaccination coverage throughout the city. We anticipate that the proposed approach can be easily automated and broadly applied to various urban settings.

Caribbean Commission

1951 ◽  
Vol 5 (4) ◽  
pp. 810-811
Keyword(s):  
United Kingdom ◽  
Fish Species ◽  
Joint Meeting ◽  
Research Committee ◽  
Commercial Fish ◽  
The United Kingdom ◽  
Trawl Fishing ◽  
The Caribbean

A joint meeting of the Research Committee on Agriculture, Fish, Wildlife and Forestry and the Preparatory Fisheries Committee was held in Trinidad on July 9, 1951. The meeting, under the chairmanship of the United Kingdom representative (Frampton), discussed proposals regarding commercial trawl fishing in the Gulf of Paria and the organization of the Fisheries Conference. The committee felt that a survey of commercial trawl fishing should be undertaken at an estimated expense of $2,000. The committee also recommended that the Fisheries Conference, to be held in March 1952 for five days, should meet in Trinidad and have an agenda as follows: occurrence and distribution of commercial fish species in the Caribbean, techniques used in the Caribbean for fish capture, types of fishing craft used, marketing, storing, distribution, conserving methods, and cultivation of fish in ponds.

scholarly journals Evaluation of Trace Metal Levels in Tissues of Two Commercial Fish Species in Kapar and Mersing Coastal Waters, Peninsular Malaysia

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Fathi Alhashmi Bashir ◽  
Mohammad Shuhaimi-Othman ◽  
A. G. Mazlan
Keyword(s):  
Trace Metal ◽  
Fish Species ◽  
Coastal Waters ◽  
Positive Association ◽  
Peninsular Malaysia ◽  
International Standards ◽  
Metal Concentrations ◽  
Commercial Fish ◽  
Metal Levels ◽  
The Relationship

This study is focused on evaluating the trace metal levels in water and tissues of two commercial fish species Arius thalassinus and Pennahia anea that were collected from Kapar and Mersing coastal waters. The concentrations of Fe, Zn, Al, As, Cd and Pb in these coastal waters and muscle, liver and gills tissues of the fishes were quantified. The relationship among the metal concentrations and the height and weight of the two species were also examined. Generally, the iron has the highest concentrations in both water and the fish species. However, Cd in both coastal waters showed high levels exceeding the international standards. The metal level concentration in the sample fishes are in the descending order livers > gills > muscles. A positive association between the trace metal concentrations and weight and length of the sample fishes was investigated. Fortunately the level of these metal concentrations in fish has not exceeded the permitted level of Malaysian and international standards.

Hepatic levels of metal and metallothioneins in two commercial fish species of the Northern Iberian shelf

2008 ◽  
Vol 391 (1) ◽  
pp. 159-167 ◽  
Author(s):  
Denise Fernandes ◽  
Maria João Bebianno ◽  
Cinta Porte
Keyword(s):  
Fish Species ◽  
Commercial Fish
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