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    Wyświetlanie 1-6 z 6
    Tytuł:
    Biotechnological bases of organization of industrial crayfish farm in Ukraine
    Autorzy:
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1031670.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    aquaculture
    biotechnology
    crayfish
    farming
    ponds
    Opis:
    Crayfish are valuable invertebrates that are constantly in great demand in all corners of the Earth. Breeding crayfish is not only large-scale production as it can also be arranged in small volumes using pools and installations of closed water supply. Cultivation of crayfish generates profit after a certain period of time, if all biotechnological norms of cultivation are considered. Cultivation of crayfish is a rather promising production, in which it is possible to obtain from 200 to 300% of stable profits during 3–4 years old. The article gives an overview of the technology of growing crayfish, taking into account the characteristics of farming in Ukraine. The basic biotechnological stages of the establishment and operation of the economy are determined, calculations of capital expenditures for the establishment of the economy are presented and the profitability of the project for the production of freshwater crayfish is determined. Cultivation of river crayfish makes it possible to obtain environmentally friendly products that can compete on the markets of Ukraine or EU countries. Also, this way of growing crayfish allows getting stocking material for release in natural reservoirs in order to restore the populations of river crayfish.
    Źródło:
    World News of Natural Sciences; 2020, 28; 1-12
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organic permaculture: cultivation of Eisenia andrei earthworms for use as feed for aquatic organisms
    Autorzy:
    Selivanov, Yevhen
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1031440.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Eisenia andrei
    Eisenia fetida
    aquaculture
    feed
    vermiculture
    Opis:
    This paper examines the biological features and taxonomic status of the red wiggler worm Eisenia andrei as presented in the relevant literature. We evaluate the economic feasibility of cultivating this species as feed for aquaculture purposes and discuss conventional cultivation methods.
    Źródło:
    World Scientific News; 2021, 152; 39-54
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aquaculture for sustainable development in Nigeria
    Autorzy:
    Okwodu, Nicholas E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192662.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Aquaculture
    fish farming
    farm
    developing countries
    Opis:
    Aquaculture is the rational rearing of fish and other aquatic organism in man-made ponds, reservoir and cages. It is also referred to as fish farming. Aquaculture is still being practiced at subsistence level in Nigeria. It is essentially a rural, secondary and part-time activity taking place in small farms in small freshwater ponds. Aquatic organisms produced through aquaculture include fish, aquatic invertebrates, planktons and aquatic plants (seaweeds). Aquaculture came as a solution to wild stock which are been depleted, to meet the protein need of the rural population and to overcome the problems inherent in wild fisheries. The application of aquaculture has unveiled to an extent the degree to which fish farming can sustain the economy and provide the necessary protein need of the country. The management of aquaculture for fish production starts from the setting up of the farm until the ponds begin to yield. The major management problem of fishery conservation is how to control both man and the aquatic crops for the present and the future when the demand will probably be greater than now. Aquaculture is very important and is the fastest growing animal based food producing sector particularly in developing countries.
    Źródło:
    World Scientific News; 2016, 47, 2; 151-163
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of difference filter media on Recirculating Aquaculture System (RAS) on tilapia (Oreochromis niloticus) production performance
    Autorzy:
    Tanjung, Ricky Rahmat Maliki
    Zidni, Irfan
    Iskandar, Iskandar
    Junianto, Junianto
    Powiązania:
    https://bibliotekanauki.pl/articles/1075772.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Oreochromis niloticus
    filter media
    production
    recirculating aquaculture system
    tilapia
    Opis:
    This research aims to determine the composition of the best filter media on tilapia (Oreochromis niloticus) production performance. The method used in this research is experimental methods use Completely Randomized Design (CRD), which consist of four variables and three replications. The variable used is (A) without media filter (Control); (B) combination of cotton, bio ball and charcoal; (C) combination of cotton bioring and charcoal; (D) combination of cotton, Japanese matt and charcoal. The test fish used 180 tilapia fish with 7-9 cm length size. Tanks that used measured 60 cm x 30 cm x 36 cm as many as 12 pieces. The density during the research was 15 tails per tank. Duration of maintenance is 40 days. The feeding level is given by 5% of fish body weight. Water quality parameters (temperature, dissolved oxygen, pH, ammonia, and nitrate) were observed every 10 days for 40 days. Other parameters are survival rate, absolute length and weight growth, specific growth rate and feed convertion ratio observed every 7 days for 40 days. The results showed that the best composition of filter media for tilapia production performance was combination of cotton, bioball, and charcoal. Tilapia production performance obtained a combination of cotton filter media, bioball, and charcoal with 100% survival rate, length growth 2.17 cm, weight growth of 9.91 g, and specific growth rate of 2.3% and feed conversion ratio of 1.88.
    Źródło:
    World Scientific News; 2019, 118; 194-208
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative analysis of Yellow Head Virus (YHD) diagnostic methods adopted in Sri Lanka to investigate the accuracy and specificity of the virus
    Autorzy:
    Amarakoon, A. A. D. Gayathri U.
    Wijegoonawardane, P. K. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182758.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Aquaculture
    OIE
    Penaeus monodon
    RNA
    Yellow head virus
    Opis:
    Yellow head virus is a common viral pathogen which infects cultured Penaeus monodon world-wide, resulting in immature larvae and the growth retardation. Therefore, several detection methods are recommended by the Office des Epizootics (OIE) for use in Asia including Sri Lanka. This study was attempted to evaluate the RT-PCR diagnostic method is the appropriate and accurate YHV detection method which is recommended by the OIE comparing with histological identification and haemolymph Smear method. A total of 150 individuals of Penaeus monodon, post larve samples obtained from different shrimp hatcheries located in Northwestern province were screened for the presence of YHV and the results were comparatively analyzed with three different protocols, namely wet mount observation, histopathological observation and RT- PCR detection. Highest prevalence was recorded with wet mount observations (78%) and the lowest was recorded using histopathology (22%). Comparison of PCR tests generated consisted of positive samples 31/51 (2010), 38/65(2011) and 18/34 (2012) respectively. The results obtained with the IQ2000 commercial kit, were the most reliable and it indicated 56.6% average prevalence of YHV.
    Źródło:
    World Scientific News; 2017, 66; 181-192
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Basics of Aquaculture and Hydrobiotechnology
    Autorzy:
    Fedonenko, Olena
    Marenkov, Oleh
    Sharamok, Tetiana
    Kolesnik, Natalia
    Grygorenko, Tetiana
    Symon, Mariia
    Powiązania:
    https://bibliotekanauki.pl/articles/1178279.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Californian red worm
    algae
    apple snails
    aquaculture
    freshwater prawn
    grape snail
    nematodes
    Opis:
    The manual sets out the necessary material concerning the cultivation of certain objects of aquaculture that can be used as feed additives. The manual is intended for practical work on aquaculture, as well as for independent work and self-study students. The material is designed for students of biological faculties of full-time and correspondence forms of training.
    Źródło:
    World Scientific News; 2017, 88, 1; 1-57
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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