Experimental larval rearing of the Japanese sea cucumber in a mini plant in Severnaya bay (Slavyansky bay, Sea of Japan) was carried out. The experiment did not reveal any relevant difference in time or speed of reaching different larval development stages or survival rate of the sea cucumber either with the diet supplemented with pigmented yeast Rhodotorula benthica or when fed with the Chaetoceros muelleri and Dunaliella salina phytoplankton. In the lack of the traditional phytoplankton-based fodder, it appears relevant and feasible for the aquaculture enterprises to use such fodder replacement options as Rhodotorula benthica marine pigmented yeast, a non-pathological species with low production cost that does not require any sophisticated cultivation techniques, easy to use and generally yielding a highly predictable production result.

No abstract

The contribution of the coalescence mechanism to deuteron production is discussed on the basis of data on inclusive deuteron and proton production in hadron-nucleus interactions. The angular dependence and the A dependence of the coefficient of twonucleon coalescence into a deuteron are analysed for 7.5 GeV/c pA and 5 GeV/c rc-A interactions. The results suggest an elongated shape of the interaction region along the trajectory of the incident hadron and a successive knock-out of nucleons during propagation of the incident particle through a nucleus.

Optimization of the nutritional formulation for the cultivation of rhodotorula spp yeast was carried out. using the theory of experimental planning. Optimal values of process factors (prescription components) are obtained: mass fraction of spirulina -0.62%; hemp protein - 0.37%, at which the response function (yeast biomass) reaches an optimal value of 31.25 g / l. The development of the domestic feed base according to the obtained methodology will solve the problem of providing feeds that increase the viability of the cultivated object, and ensure a stable supply of feed based on sea yeast Rhodotorula benthica to mariculture enterprises.

The Strategy for the development of the fisheries complex of the Russian Federation for the period up to 2030, approved by the decree of the Government of the Russian Federation (dated November 26, 2019 N 2798-r) provides for a set of measures for the rational use of biological resources. The most promising direction of this task is the creation of modern technologies for deep pro-cessing of fish raw materials, providing for an integrated approach and taking into account its technological potential.