Status of Crayfish Populations (Astacidae) on the Eastern Coast of the Caspian Sea
V. B. Ushivtsev,
M. L. Galaktionova,
S. A. Kotenkov,
T. A. Sinitsyna,
G. A. Akhmedova,
Mehdi Ghodrati Shojaei https://doi.org/10.18470/1992-1098-2021-4-8-17
Abstract
Aim. This work aims to study the distribution and stocks of crayfish on the eastern shelf of the Caspian Sea at places where they mostly habitat.
Material and Methods. The studies were implemented in the spring and summer of 2019. The material was collected by scuba divers surveying routes of transects 100 m2 in area. Collected crayfish were identified at species level, measured, weighed and their fertility was evaluated. Their abundance was calculated by estimating the aggregation density along the routes (ind./m2), with subsequent recalculation for the biotope areas, which were identified using data from the Caspian Sea satellite monitoring. The stocks were estimated according to the size and weight characteristics of collected individuals.
Results. Two astacid species inhabit the surveyed area: Pontastacus eichwald Bott – long‐clawed crayfish and Caspiastacus pachypus Rathke – thick‐clawed crayfish. Certain changes have occurred compared with archival data of the 1970s‐1990s. The range area has expanded and the abundance of C. pachypus has increased. The fertility of both C. pachypus and P. eichwald has reduced.
Conclusion. The crayfish stocks in the surveyed area are of commercial importance. The application of satellite survey data greatly increases the objectivity of research.
Keywords
Caspian Sea,
eastern coast,
crayfish,
distribution,
species composition of populations,
features of species biology,
commercial and economic value of stocks,
total allowable catch
Supporting agencies: The research was conducted in the framework of State Assignment of IORAS (Subject No. 0128‐2021‐0004) and was also funded by RFBR through the research project No 20‐54‐56053 and by INSF, project number No99003103.
About the Authors
V. B. Ushivtsev
P.P. Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
Vladimir B. Ushivtsev, Candidate of Biological Sciences, Director, Caspian Branch
bldg. 27, 6 Savushkina St, Astrakhan, 414056
Tel. +78512544559
M. L. Galaktionova
P.P. Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
Maya L. Galaktionova
Moscow
S. A. Kotenkov
P.P. Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
Sergey A. Kotenkov
Moscow
T. A. Sinitsyna
P.P. Shirshov Institute of Oceanology RAS
Russian Federation
Russian Federation
Tatyana A. Sinitsyna
Moscow
G. A. Akhmedova
Dagestan State University
Russian Federation
Russian Federation
Gulnara A. Akhmedova
Makhachkala
Mehdi Ghodrati Shojaei
Tarbiat Modares University
Islamic Republic of Iran
Islamic Republic of Iran
Mehdi Ghodrati Shojaei
Noor
References
1. Bokova E.N. Crayfish of the Caspian Sea. Rybnoye khozyaystvo [Fish farm]. 1948, no. 9, pp. 32‐37. (In Russian)
2. Baydin S.S., Kosarev A.N. Kaspiyskoye more: Gidrologiya i gidrokhimiya [Caspian Sea: Hydrology and Hydrochemistry]. Moscow, Nauka Publ., 1986, 261 p. (In Russian)
3. Rumyantsev V.D. Thick‐clawed crayfish of the Caspian Sea. Trudy KaspNIRKha [Labors of CaspNIRKh]. 1971, vol. 26, pp. 265‐266. (In Russian)
4. Ushivtsev V.B. Astacofauna of the present Caspian Sea (distribution, stock dynamics, behavior, projects of fishery). Proceeding of the 12th Symposium IAA. Agsburg – Germany, 1998, 57 р.
5. Posle shtorma bereg Kaspiya zapolonili raki [After the storm, the coast of the Caspian Sea was filled with crayfish]. 2019. Avialable at: https://www.ktk.kz/ru/newsfeed/article/2019/03/11/114578/ (accessed 06.15.2020) (In Russian)
6. Rumyantsev V.D. Rechnye raki Volgo‐Kaspiya [River crayfish of the Volga‐Caspian region]. Moscow, Pishchevaya promyshlennost' Publ., 1974, 84 p. (In Russian)
7. Ushivtsev V.B. Determination of crayfish stocks in the Caspian sea. Rybnoe khozyaistvo [Fish farm]. 1981, no. 4, pp. 50‐51. (In Russian)
8. Ushivtsev V.B. Zapasy rakov v Kazakhskikh vodakh Kaspiya [Stocks of crayfish in the Kazakh waters of the Caspian]. Tezisy dokladov XIX nauchnoi konferentsii «Biologicheskie osnovy rybnogo khozyaistva vodoemov Srednei Azii i Kazakhstana», Ashkhabad, 9‐11 Oktyabrya, 1986 [Abstracts of the XIX scientific conference "Biological foundations of fisheries in the reservoirs of Central Asia and Kazakhstan", Ashgabat, 9‐11 October 1986]. Ashgabat, 1986, 121 p. (In Russian)
9. Ushivtsev V.B. Vliyanie kolebanii urovnya Kaspiya na zapasy rakov [Impact of fluctuations in the level of the Caspian Sea on crayfish stocks]. Tezisy dokladov I‐i Mezhdunarodnoi konferentsii «Biologicheskie resursy Kaspiiskogo morya», Astrakhan', 22‐24 sentyabrya 1992 [Abstracts of the I‐st International Conference "Biological Resources of the Caspian Sea", Astrakhan, 22‐24 September 1992]. Astrakhan, 1992, 93 p. (In Russian)
10. Ushivtsev V.B. [Marine objects of fishing]. In: Nauchnyye osnovy raspredeleniya prom. ob"yektov Kaspiyskogo moray [Scientific Basis for the Distribution of Industrial Objects of the Caspian Sea]. Astrakhan, BIIS Kaspryba Publ., 1992, pp. 98‐99. (In Russian)
11. Ushivtsev V.B. et al. [The state of crayfish stocks on the eastern shelf of the Caspian Sea in the period of sea level rise]. In: Ekosistemy morey Rossii v usloviyakh antropogennogo pressa [Ecosystems of the Seas of Russia in Conditions of Anthropogenic Pressure]. Astrakhan, CaspNIRKH Publ., 1994, pp. 155‐157. (In Russian)
12. Ushivtsev V.B., Kamakin A.M. Crayfish of the Southern Caspian (Crustacea: Decapoda, Astacidae): distribution, nature of biotopes. Kaspiyskiy Plavuchiy Universitet, Nauchnyy byulleten' [Caspian Floating University, Scientific Bulletin]. 2000, no. 1, 157 p. (In Russian)
13. Denisov A.E. Some questions of the methodology of diving research of bottom communities. Oceanologiya [Oceanology]. 1972, vol. 12, iss. 5, pp. 884‐891. (In Russian)
14. Ushivtsev V.B. Osobennosti rasprostraneniya populyatsiy rakov (Crustacea, Decapoda, Astacidae) na vostochnom shel'fe Kaspiyskogo morya v period s 1915 po 2016 gg. [Characteristics of the spread of crayfish populations (Crustacea, Decapoda, Astacidae) on the eastern shelf of the Caspian Sea from 1915 to 2016]. Sbornik materialov Vserossiyskoy nauchno‐prakticheskoy konferentsii «Morskiye biologicheskiye issledovaniya: dostizheniya i perspektivy», Sevastopol', 19‐24 sentyabrya 2016 [Сollection of Materials of the All‐Russian Scientific and Practical Conference «Marine biological research: achievements and prospects, Sevastopol, 19‐24 September 2016]. Sevastopol, 2016, pp. 232‐236. (In Russian)
15. Ushivtsev V.B., Vostokov S.V., Akhmedova G.A., Galaktionova M.L., Kotenkov S.A. Current state and economic value of astacofauna in certain areas of the eastern shelf of the Caspian Sea. South of Russia: ecology, development, 2020, vol. 15, no. 1, pp. 28‐36. (In Russian) DOI: 10.18470/1992‐1098‐2020‐1‐28‐36
16. Ginzburg A.I., Kostyanoy A.G., Soloviev D.M., Sheremet N.A. Frontal upwelling zone near the eastern coast of the Caspian Sea (satellite observations). Issledovaniya Zemli iz kosmosa [Earth Research from Space]. 2006, no. 4, pp. 3‐12. (In Russian)
17. Cherkashina N.Ya. Biology of Astacus leptodactylus eichwaldi Bott and Astacuspachypus Rathke in the Turkmen waters of the Caspian. Trudy VNIRO [Labors of VNIRO]. 1974, vol. 99, iss. 5, pp. 70‐83. (In Russian)
18. Cherkashina N.Ya. Distribution and biology of thick‐ clawed crayfish in the Turkmen waters of the Caspian Sea. Zoologicheskii zhurnal [Zoological journal]. 1976, vol. 55, no. 4, pp. 602‐606. (In Russian)
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For citations:
Ushivtsev V.B., Galaktionova M.L., Kotenkov S.A., Sinitsyna T.A., Akhmedova G.A., Shojaei M.G. Status of Crayfish Populations (Astacidae) on the Eastern Coast of the Caspian Sea. South of Russia: ecology, development. 2021;16(4):8‐17. (In Russ.) https://doi.org/10.18470/1992-1098-2021-4-8-17
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