SOME ASPECTS OF THE GROWING CONDITIONS OF THE AUSTRALIAN RED-CLAWED CRAYFISH (&lt;i&gt;CHERAX QUADRICARINATUS&lt;/i&gt;) IN THE ASTRAKHAN REGION

Pyatikopova, O. V.; Ankesheva, B. M.; Tangatarova, Ralina Rasimovna; Bedritskaya, Irina

doi:10.47921/2619-1024_2022_5_3_32

Cited by 6 publications

(1 citation statement)

References 1 publication

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“…Анализ температурного режима в годовом аспекте позволил определить оптимальный период для прудовой аквакультуры тропического рака, который может составлять 115-125 суток (с III декады мая по II декаду сентября). Остальное время (240-250 суток) объекты могут содержаться в контролируемых температурных условиях, например в УЗВ [23].…”

Section: результатыunclassified

Biotechnical indicators of red-clawed crayfish commercial cultivation in pond aquaculture in the conditions of the South of Russia

Pyatikopova,

Bedritskaya,

Tangatarova

et al. 2023

Vestnik of Astrakhan State Technical University. Series: Fishing Industry

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Work was carried out on commercial cultivation of the australian red-clawed crayfish Cherax quadricarinatus in the pond aquaculture of the Astrakhan region in the summer-autumn period of 2021 and 2022. During the exper-iment, young crayfish were studied, formed in 5 groups in accordance with the initial average weight of 0.17, 0.18, 1.8, 5.1 and 7.8 g and cultivated in ponds with an area of 0.1 hectares each. The duration of cultivation was 62-99 days, depending on the groups under consideration. During the work, the main size and mass characteristics of cancers in each group were determined, linear growth, weight gain, bio-mass, survival, overall cancer productivity, and the yield of marketable products were calculated. Also, the hydrochemical parameters of the environment and the feed base of the ponds were monitored, the values of which characterized the condition of the ponds as satisfactory for the cultivation of crayfish. The average daily water temperature during the work period was in the range of 24.0-25.0 ºC on average. It is determined that the optimal period of cultivation of ARCC under natural temperatures should be at least 3 months. The average weight of young crayfish planted in ponds for cultivation can be 0.2-8.0 g, depending on the tasks set: obtaining a larger number of crayfish within an average weight of 40 g, obtaining a smaller number, but larger individuals (60-80 g). It is most effective to plant juveniles of an average weight of at least 2 g in ponds. Cultivation of early ARCC juveniles in ponds in the South of Russia to produce commercial cancers is less effective, but it is possible due to the highest yield of commercial products per hectare of area among the groups of cancers under consideration. The hydrochemical regime of reservoirs must meet the biological requirements of the species. The condition of ponds, and in particular, the rapid development of aquatic vegetation in the water column during cultivation can significantly reduce the natural cancer productivity of reservoirs.

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Section: результатыunclassified

Biotechnical indicators of red-clawed crayfish commercial cultivation in pond aquaculture in the conditions of the South of Russia

Pyatikopova,

Bedritskaya,

Tangatarova

et al. 2023

Vestnik of Astrakhan State Technical University. Series: Fishing Industry

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Experience of pond cultivation for red-clawed crayfish in the Astrakhan Region

Pyatikopova,

Bedritskaya,

Popov

et al. 2024

Izv. Tihookean. naučno-issled. rybohoz. centra

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Results of red-clawed crayfish cultivation in pond aquaculture in the Astrakhan Region are presented. Growing of Australian red-claw crayfish Cherax quadricarinatus juveniles in ponds with different distribution density and periods of cultivation within the summer-autumn seasons are analyzed and basic requirements for the pond cultivation of this species are determined. The optimal dimensions of pond are the following: area 0.1–0.5 hectares, depth 1.5–2.0 m, V-shaped bottom. Ponds with natural fodder base should be prepared in 20–30 days before placing the crayfish. Artificial fertilization is available for ponds with depleted soil by 3–5 t/ha of manure applied locally in the area of the pond water supply in 20–30 days before the placing. Zooplankton abundance can be increased with input of Cladocera culture, as Daphnia magna (Straus 1820), in amount of 100–500 g/ha. Coastal aquatic vegetation should not occupy more than 5 % of the pond area at the beginning of cultivation and 15 % by its end. Duration of juvenile crayfish growing in ponds of the Astrakhan Region is limited by temperature conditions (water temperature > 20 ºC is favorable for the growth) and does not exceed 115–125 days depending on the water heating. At least 100 days of growing are necessary for successful harvest. The optimal mean daily temperature of water in ponds for growing and harvesting crayfish is 23–24 ºC. Certain conditions and dates of rearing can be chosen to get certain body size of production. Small-sized juveniles with weight below 0.1 g are used for growing to the weight of 40 g in 80–100 days for the purposes of both further cultivation, replenishment of the broodstock, or sale. For producing crayfish with the weight > 40 g, juveniles with larger initial size (2–5 g) should be grown in 90–100 days. The individuals with the weight > 5 g are used as producers of planting material; at least 100 days are necessary for growth to this size. Rearing such individuals in controlled conditions (e.g. in closed water supply installations) allows to obtain the progeny in the fall of current year.

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Recommendations for growing young Australian red-clawed crayfish (Cherax quadricarinatus) in industrial conditions

Pjatikopova¹,

Harchenko²,

Bedrickaja³

et al. 2023

Fish Breeding and Fisheries

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The Australian thermophilic red-clawed crayfish (Cherax quadricarinatus) is characterized by a number of qualities that ensure its effective cultivation in commercial aquaculture. At the same time, the year-round cultivation of this species in natural reservoirs of Russia is limited by the seasonal course of temperatures. In this regard, the cultivation of tropical crayfish in certain periods of life in regulated conditions is a necessary stage of full-cycle technology. In particular, the successful maintenance of ARCC juveniles until they are transferred to natural conditions (after reaching a mass of 5 g) in installations with a controlled temperature regime is due to a number of factors. First of all, this is the planting density, which naturally depends on the area and capacity of installations with a closed water supply cycle, the size, mass and age characteristics of the object. The physiological and biological state of crayfish, the intensity and quality of feeding, and the duration of cultivation play an important role. The purpose of this work is to determine the main technological indicators of growing juveniles Australian red-clawed crayfish in industrial conditions up to 5 g. Data on the results of growing juveniles Australian red-clawed crayfish under controlled temperature conditions showed the main differences in mass indicators and survival of groups of juveniles Australian crayfish depending on the initial average weight, planting density, order of offspring. The terms of growing juveniles up to 5 g have been established, the feed costs for this period have been calculated, the chemical composition of the body of juvenile crayfish has been determined.

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SOME ASPECTS OF THE GROWING CONDITIONS OF THE AUSTRALIAN RED-CLAWED CRAYFISH (<i>CHERAX QUADRICARINATUS</i>) IN THE ASTRAKHAN REGION

Cited by 6 publications

References 1 publication

Biotechnical indicators of red-clawed crayfish commercial cultivation in pond aquaculture in the conditions of the South of Russia

Biotechnical indicators of red-clawed crayfish commercial cultivation in pond aquaculture in the conditions of the South of Russia

Experience of pond cultivation for red-clawed crayfish in the Astrakhan Region

Recommendations for growing young Australian red-clawed crayfish (Cherax quadricarinatus) in industrial conditions

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