Results 71 to 80 of about 3,842,095 (218)

The fishery significance of a pond-type riverbed water-lifting reservoir on small watercourses of the Volga region by the example of the Truev river

Известия высших учебных заведений. Поволжский регион: Естественные науки
Background. The article considers a special type of reservoirs – partially regulated sections of riverbeds and streams formed by hydraulic structures and other artificial obstacles on the example of the Nadezhdinskiy reservoir on the Truev river in Penza
Alik Yu. Asanov
doaj   +1 more source

Diagnosing of Biological Productivity in Lake Ecosystems

Водное хозяйство России: проблемы, технологии, управление, 2019
This work presents the system for biological productivity estimation in lake ecosystems. Input parameters of system (x – variables) are latitude, specific catchment area, average annual air temperature, annual sum precipitation, mean and maximum water ...
Viktor V. Boulion
doaj   +1 more source

Celebrating the Wildlife and Sport Fish Restoration program: 75 years of conservation and partnership success

, 2013
Seventy-five years of successful wildlife management is the remarkable legacy of the Pittman-Robertson Wildlife Restoration Act, and the cause of our 75th celebration. Along with the Dingell-Johnson Sport Fish Restoration Act, it is the foundation of the
U.S. Fish and Wildlife Service
core  

Polyculture of Giant Freshwater Prawn, Macrobrachium rosenbergii and Nilem Carp, Osteochilus hasselti Cultured in Recirculation System Using Biofiltration

E3S Web of Conferences, 2018
Giant Freshwater Prawn is one of the freshwater commodity which have an economy value where Nilem carp has also potentially to be cultured to produce fingerling size as a “baby fish”.
Setiadi Eri, Taufik Imam
doaj   +1 more source

THE EFFECT OF MEAN FINGERLING WEIGHT ON THE RESULTS OF YOUNG-OF-THE-YEAR PADDLEFISH (POLYODON SPATHULA WALBAUM) REARING

Ribogospodarsʹka Nauka Ukraïni, 2015
Purpose. To determine the optimum fingerling body weight during the process of young-of-the-year paddlefish (Polyodon spathula Walbaum) rearing. To adapt the existing technologies of young-of-the-year paddlefish rearing to conditions of southern Ukraine.
N. Grudko
doaj   +1 more source

The features of the natural fish productivity formation of a shallow reservoir free of ichthyofauna on the western slope of the Volga upland within Penza region

Известия высших учебных заведений. Поволжский регион: Естественные науки, 2023
Background. The development of “artisanal” aquaculture, fish farming, fish cultivation in reservoirs of complex purpose is given great importance, both at the global level, in the Russian Federation and in Penza region.
Alik Yu. Asanov
doaj   +1 more source

Productivity of hired and family labour and determinants of technical inefficiency in Ghana's fish farms

, 2018
This paper examines the productivity of hired and family labour and determinants of technical inefficiency of fish farms in Ghana. A modified Cobb-Douglas stochastic frontier production function which accounts for zero usage of family and hired labour is
E. Onumah, G. Hoerstgen-Schwark, Bernhard Brümmer   +2 more
semanticscholar   +1 more source

Farm size, productivity and efficiency nexus: The case of pangas fish farming in Bangladesh

Journal of the Bangladesh Agricultural University, 2018
The inverse relationship between farm size and productivity is one of the most debated findings in agricultural productivity researches of developing countries.
S. Aktar, M. Khan, M. H. Prodhan, M. Mukta   +3 more
semanticscholar   +1 more source

Vessel-level productivity in Commonwealth fisheries [PDF]

The total factor productivity of the Commonwealth Trawl Sector of the Southern and Eastern Scalefish and Shark Fishery is estimated for the period 1996–97 to 2008–09 using vessel-level data and a traditional approach that captures the production ...
Perks, Christopher, McGill, Kristin, Curtotti, Robert   +2 more
core  

EFFECT OF FEEDING PREMIX VMA AND FEEDYEAST ON PRODUCTIVE CHARACTERISTICS AND BLOOD BIOCHEMICAL PARAMETERS OF THE ONE-YEARS CARP (CYPRINUS CARPIO)

Ribogospodarsʹka Nauka Ukraïni, 2014
Purpose. To study the effect of feeding carp with VMA premix in a complex with fodder yeasts and separately on their productivity and some biochemical parameters of blood as well as to analyze the level of provision of the experimental groups of fish ...
O. Deren
doaj   +1 more source