Red yeast Rhodotorula benthica – substitute feed base for echinoderms in factory cultivation

И В Матросова ,A A Politaeva

doi:10.1051/e3sconf/202126505010

И В Матросова , A A Politaeva

Open Access

https://doi.org/10.1051/e3sconf/202126505010

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Abstract

Now decrease press of the fishery on natural populations of hydrobionts and restoration of their number due to artificial reproduction is actual. At artificial cultivation important properly to choose the right feed. To develop the feeding technology, work was carried out with larvae and juveniles of sea cucumber and gray sea urchin in the conditions of the mini-plant of the Scientific and Production Department of Mariculture of the Far Eastern State Technical Fisheries University located in Severnaya Bay (Slavyansky Gulf, the Sea of Japan) and Troitsa Bay (Vladimir Gulf, the Sea of Japan). Experimental studies have shown the possibility of using the sea yeast Rhodotorula benthica as either the main feed or as a feed additive. Practical recommendations have been developed for the use of Rhodotorula benthica yeast as a substitute feed base for growing larvae and juveniles of Japanese sea cucumber and gray sea urchin. The results of the work will serve as a basis for the development of biotechnology for feeding at echinoderm breeding farms and will be useful to the organizations, whose duties include rational and competent progress of marine economic territories.

Highlights

The urgent task is artificial reproduction of echinoderms to preserve their numbers in natural populations
The objective of this study is to develop practical recommendations on the use of the yeast Rhodotorula benthica as a substitute feed base for growing larvae and juveniles of the Japanese sea cucumber and gray sea urchin
To develop practical recommendations for feeding the research work was carried out with larvae and juveniles of sea cucumber and gray sea urchin in the conditions of the mini-plant of the Scientific and Production Department of Mariculture of the Far Eastern State Technical Fisheries University located in Severnaya Bay (Slavyansky Gulf, the Sea of Japan) and Troitsa Bay (Vladimir Gulf, the Sea of Japan)

Summary

Introduction

The urgent task is artificial reproduction of echinoderms to preserve their numbers in natural populations. An effective way of reinforcing the natural accumulation of holothuria and the commercial product output is the development and implementation of the juveniles rearing technologies at the industrial facilities. [1,2] At the present time regardless of all the recommendations and standards developed for all stages of the technological process, the problems of selecting a more stable fodder base (diet) for the larvae and settled juveniles remain unsolved; the diseases that occur at any development stage and the uncontrollable biotic factors of the media still can cause the death of the entire reared colony of animals [3]. It is important to optimize technological processes at enterprises for the cultivation of echinoderms by using alternative feed bases or additives for juveniles and larvae. The objective of this study is to develop practical recommendations on the use of the yeast Rhodotorula benthica as a substitute feed base for growing larvae and juveniles of the Japanese sea cucumber and gray sea urchin

Research materials and methods

Research results

1-1.25 As feed base

Findings

Conclusions