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«IZVESTIYA IRKUTSKOGO GOSUDARSTVENNOGO UNIVERSITETA». SERIYA «BIOLOGIYA. ECOLOGIYA»
«THE BULLETIN OF IRKUTSK STATE UNIVERSITY». SERIES «BIOLOGY. ECOLOGY»
ISSN 2073-3372 (Print)

List of issues > Series «Biology. Ecology». 2025. Vol 54

Development of a Method for Preserving Living Material from Deep-Sea Ichthyological Catches in Lake Baikal during Open-Water Period

Author(s)

S. I. Didorenko1, A. A. Etingova1, N. S. Mugue2, A. E. Barmintseva2, A. B. Kupchinsky1

1 Baikal Museum SB RAS, Listvyanka, Russian Federation

2 Russian Federal Research Institute of Fisheries and Oceanography, Moscow, Russian Federation

Abstract
A set of measures is presented that make it possible to keep alive from 80 to 100% of initially intact individuals of Baikal deep-sea fishes of sub-ordo Cottoidei, during their capture during periods of open water from depths ≥ 250 m and transportation on a research vessel, with the possibility of subsequent long-term maintenance in stationary aquariums. The presented measures are grouped into 12 abstracts for ease of perception. The following actions and controlled parameters in the specified ranges have been developed and are recommended: speed of trawling and duration of trawling: 3–4 km/hour, 30–45 minutes; surface water temperature during trapping and washing of the collect bag and the catch significant: 3–8℃; removing fish from the tackle: promptly, without squeezing the fish's body, using rubberized tweezers and plastic instruments; primary placement of fishs in flushing containers, subsequent transfer to shipping containers in refrigerating chambers; water salinity: in flushing and transportation tanks 3–7‰; sizes and types of transported fish: separate transportation of different-sized individuals, separate transportation of species that secrete mucus under stress; landing density of transported fish: recommended landing densities for different species and size groups are indicated; containers and substrates: transparent or translucent plastic containers for transporting fish; fragments of sunken wood and tree bark for dispersing transported specimens; transportation temperature, aeration, lighting: a safe temperature range of 1.5–7.5℃; continuous aeration with air from a compressor located in the same refrigerating chamber as the fish; exclusion of prolonged exposure to sunlight; feeding of transported fish: preferred feeding objects and feeding modes are given; water changes: daily, by 50–70% of the volume, with a deviation from the temperature of the water being replaced by less than 0.3℃; inspection of containers and fish care: daily, using nets and additional rubberized or plastic tools; recovery of dead specimens: immediate, with an unscheduled water change. The described measures yielded fully or partially successful results for representatives of 18 deep-sea species belonging to all 3 families of sub-ordo Cottoidei.
About the Authors

Didorenko Sergey Ivanovich Postgraduate Baikal Museum SB RAS 1 Akademicheskaya st., Listvyanka Settl., Irkutsk Region, 664520, Russian Federation e-mail: didorenkos@mail.ru 

Etingova Anna Albertovna Candidate of Sciences (Biology), Research Scientist Baikal Museum RAS 1, Academicheskaya st., Listvyanka Settl., Irkutsk Region, 664520, Russian Federation e-mail: maritui@mail.ru 

Mugue Nikolay Sergeevich Candidate of Sciences (Biology), Senior Research Scientist Russian Federal Research Institute of Fisheries and Oceanography 19, Okruzhnoy proezd, Moscow, 105187, Russian Federation e-mail: mugue@vniro.ru 

Barmintseva Anna Evgenyevna Candidate of Sciences (Biology), Leading Research Scientist Russian Federal Research Institute of Fisheries and Oceanography 19, Okruzhnoy proezd, Moscow, 105187, Russian Federation e-mail: bae69@mail.ru 

Kupchinsky Alexander Borisovich Candidate of Sciences (Biology), Director Baikal Museum SB RAS 1, Academicheskaya st., Listvyanka Settl., Irkutsk Region, 664520, Russian Federation e-mail: albor67@mail.ru

For citation
Didorenko S.I., Etingova A.A., Mugue N.S., Barmintseva A.E., Kupchinsky A.B. Development of a Method for Preserving Living Material from Deep-Sea Ichthyological Catches in Lake Baikal during Open-Water Period. The Bulletin of Irkutsk State University. Series Biology. Ecology, 2025, vol. 54, pp. 38-54. https://doi.org/10.26516/2073-3372.2025.54.38 (in Russian)
Keywords
deep-sea fish, suborder Cottoidei, capture and transportation of fish, conservation of live specimens, Lake Baikal, open-water period, methodological recommendations.
UDC
57.084.1
DOI
https://doi.org/10.26516/2073-3372.2025.54.38
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