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结果 1-10 的 25
Zemkopibas zinatne - praksei | Agriculture - production
1968
Spogis, K.
Doklady k IX Mezhdunarodnomu kongressu pochvovedov | Papers submitted to the IX International Congress of Soil Science
1968
Bambergs, Karlis
Paligs mezrupniecibas mehanizatoram | Aid to machinists at timber exploitation sites
1968
Lusis, Arvids | Kl̦avin̦š, Māris | Zarins, B.
Voprosy gidrolesomelioratsii | Problems of hydromelioration of forests
1968
Buss, K.
Povyshenie produktivnosti lesa
1968
Sarma, P. Ė.
[Listostebel'nye mkhi Latviĭskoĭ SSR. (romanized form)] | [Листостебельные мхи Латвийской ССР. (romanized form)]
1968
Ābolin̦a, A. | Аболин, Аустра Адольфовна
The prospects of creation of sturgeon farm in the Baltic States | Перспективы создания осетрового хозяйства в Прибалтике
1968
Kairov, E.A.
The establishment of a sturgeon-breeding farm for commodity output is suggested in the Baltic states. The release of the juvenile sturgeons into the basin of the Gulf of Riga and the internal water bodies of Latvia, Lithuania and Estonia, suitable for sturgeon feeding, should be increased. The construction of a base during the 1970-1980s for breeding of sturgeon with the annual output of at least five millions fry is suggested. | Published | Not Known
显示更多 [+] 显示较少 [-]The biotechnology for rearing of juvenile Baltic salmon on the artificial food mixture KRT | Биотехника искусственного выращивания молоди балтийского лосося при кормлении искусственной кормовой смесью КРТ
1968
Kotova, N.I. | Malikova, E.M. | Reznikova, N.S.
Methods of mass rearing of young salmon (Salmo salar) in Latvia are described. Recommendations on the collection and incubation of eggs, on the maintenance and rearing of larvae are presented. Rearing of the young stages of salmon after the transition of larvae to the active feeding, during their wintering and the period up to the smoltification was described. A broad introduction of the feeding mixture KRT is suggested, allowing an increase in the efficiency of fish hatcheries. | Published | Not Known
显示更多 [+] 显示较少 [-]Mikroelementi un to lietošana lauksaimniecības kultūrām. Atbildīgais redaktors Latvijas PSR ZA akadēmikis
1968
Aizupiete, Irma Petovna | Zurovska, Velta I︠a︡novna | Pakalns, Gūnars Ahanovich
The stock condition, abundance dynamics and the prospects of fishery for the Baltic salmon in the rivers of the Latvian SSR | Состояние запасов, динамика численности и перспективы промысла балтийского лосося в реках Латвийской ССР
1968
Evtyukhova, B.K.
The stock condition of the Baltic salmon Salmo salar in the years 1956-1966 and its year-class abundances in the period 1951-1964 are considered. The abundance dynamics of the year-classes in the Daugava River (Latvia) is analyzed. The analysis of the dependence of the year-class abundance on various factors indicates that the food basis of the salmon young stages in the Daugava limits their abundance. The dependence of the year-class abundance on the factors influencing it allowed the composition of forecasts on the possible salmon catches 1-4 years in advance. In the article data on the impact of foreign fishery on the Latvian salmon stock are presented. | Published | Not Known
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