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    Wyświetlanie 1-7 z 7
    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:
    The Productivity of Using Current Generating Circular Tanks for Tilapia Fingerling (Oreochromis niloticus (Linnaeus, 1758)) Production
    Autorzy:
    Suryadi, Ibnu Bangkit Bioshina
    Fadylah, M. Ihsan
    Iskandar, Iskandar
    Yustiati, Ayi
    Powiązania:
    https://bibliotekanauki.pl/articles/1076625.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Oreochromis niloticus
    round tanks
    tilapia
    venturi aeration
    water current
    Opis:
    This research conducted to determine the optimum water current models for growth performance and survival rate of tilapia fingerlings (O. niloticus) in circular tanks. The method used in this research is Completely Randomized Design (CRD), which consists of three treatments and four replications. The treatments are circular tanks without water current (control), circular tanks with 0.1 m s-1 water current and circular tanks that combine 0.1 m s-1 water current with venturi aeration. Tilapia fingerlings were kept in circular tanks with 30 cm diameter and 37 cm of height, with water level of 30 cm. 50 fingerlings with size of 2-3 cm were reared in every circular tank. The feed is given 3 times daily with a feeding rate of 5% from biomass. Absolute growth rate, specific growth rate, survival rate, feed conversion ratio and feed efficiency were observed every ten days, while water quality was assessed weekly. After 42 days of rearing, the results showed that the 0,1 m s-1 water current combined with venturi aeration had the highest dissolved oxygen level (6.5-7.3 mg L-1), the lowest ammonia levels (0.15-0.20 mg L-1), 92% survival rate, 1.17 g absolute growth rate, 3.65% specific growth rate, 1.3 feed convertion ratio and 77.8% feed efficiency.
    Źródło:
    World News of Natural Sciences; 2019, 27; 85-95
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Fish Stocking Density on Water Quality, Growth Performance of Tilapia and Yield of Butterhead Lettuce Grown in Decoupled Recirculation Aquaponic Systems
    Autorzy:
    Al Tawaha, Abdel Razzaq
    Wahab, Puteri Edaroyati Megat
    Jaafar, Hawa Binti
    Zuan, Ali Tan Kee
    Hassan, Mohd Zafri
    Powiązania:
    https://bibliotekanauki.pl/articles/1839576.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    decoupled aquaponics system
    stocking density
    tilapia
    butterhead lettuce
    Lactuca sativa
    Opis:
    This study was conducted over a period of 52 days to determine the effects of fish stocking density on the water quality, growth performance of tilapia and yield of butterhead lettuce cultivated in decoupled recirculation aquaponic systems (DRAPS). In this study, three respective tilapia stocking densities (treatments) of 8 kg•m-3, 10 kg•m-3, and 12 kg•m-3 were used to evaluate the butterhead lettuce in the DRAPS, which consist of two independent loops. All treatments were done in triplicates. The results showed with increased stocking density, the electrical conductivity, total dissolved substances and salinity increased and dissolved oxygen decline. The results showed that the highest stocking density produced the highest nutrients accumulation of ammonia-nitrogen (NH3-N), ammonium (NH4), nitrite-nitrogen (NO2-N) and nitrate-nitrogen (NO3-N) and potassium (K) except for phosphorus (P). Nevertheless, based on the conversion of fish feed to NO3-N and P per kilogram of feeds, the lowest stocking density provided the highest concentration of NO3-N and P. It was documented that DRAPS relied solely on the fish waste produced an insufficient concentration of N, P, K and iron. The average survival rate of tilapia in all treatments was above 94% and was not a significant difference among the treatments.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 1; 8-19
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative physiological aspects of plasma hemostasis of some commercial fish species
    Autorzy:
    Alobaidy, Holya
    Saleem, Hayder Dawood
    Al-Dhalimy, Aiman Mohammed Baqir
    Powiązania:
    https://bibliotekanauki.pl/articles/2174371.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    blood
    carp
    clotting
    coagulogram
    commercial fish species
    plasma hemostasis
    sturgeon
    tilapia
    Opis:
    The hemostasis system is designed to ensure the integrity of the body’s internal environment, stop bleeding, and maintain a liquid state of blood in the vascular channel. Modern biological and veterinary science presents highly fragmented and scarce data containing clinical and diagnostic clotting characteristics in different fish species. An essential point emphasising the practical component of such studies is spontaneous thrombus formation in fish farming described in the literature. The present research is devoted to the study of the functional state of plasma hemostasis in some ray-finned commercial fishes: phylogenetically more ancient cartilaginous ganoids - sturgeon Acipenser baerii and hybrid of sterlet A. ruthenus and starred sturgeon A. stellatus, as well as bony fishes - carp Cyprinus carpio and tilapia Oreochromis niloticus. It should be noted that the current study was performed at the aquaculture development center “AquaBioCenter” of VSDFA from 2015 to 2020. Species-specific features of clotting were revealed: activation by common and extrinsic pathways, characterised by thrombin time (TT), prothrombin time (PT), and fibrinogen concentration, is several times faster in cartilaginous ganoids than in both bony fish species; hemostasis with activation of the intrinsic pathway, characterised by activated partial thromboplastin time (APTT), is faster in hybrids and tilapias, in contrast to carps and sturgeons. Content of soluble fibrin monomer complexes (SFMC) in all fish was higher than in dogs and humans but lower than in cattle. The highest amount of SFMC was detected in carps, the lowest - in cartilaginous ganoids.
    Źródło:
    Journal of Water and Land Development; 2022, 54; 239--242
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exploring the process of aqua logistics in the Malaysian aquaculture industry- a qualitative study
    Analiza procesu logistyki przedsiębiorstw hodowlanych wodnych jako części aqua-przemysłu w Malezji - studium jakościowe
    Autorzy:
    Aziz, Zuraimi Abdul
    Hussin, Nik Syuhailah Nik
    Aziz, Nurul Ashykin Abd
    Latif, Mohd Nasrulddin Abd
    Powiązania:
    https://bibliotekanauki.pl/articles/1835502.pdf
    Data publikacji:
    2021
    Wydawca:
    Wyższa Szkoła Logistyki
    Tematy:
    aqua logistics
    distribution
    aquaculture
    tilapia
    transportation
    agro-logistics
    aqua-logistyka
    dystrybucja
    hodowla ryb
    transport
    agrologistyka
    Opis:
    The production of freshwater aquaculture fish has developed quickly and being important activity. An intensive logistics system is required to handle the shipment since the aquaculture products especially aquaculture fish are perishable. The process begins right after fish farming to final consumption. It involves a large number of stakeholders as the significant effort is required to build an efficient supply chain. However, little is known about process faced by the Malaysian aquaculture entrepreneurs during the aqua logistics activities. Therefore, this study aims to address this gap by exploring this phenomenon. Methods: For methodology part, a series of 12 aquaculture companies through focus group discussion (FGD) with the entrepreneurs were done across aqua logistic business. This was done to explore the topic and refine the research questions. Results: The present study discovers that there were linkages along the value chain of aqua logistics in aquaculture industry, which provides a specific recommendation to stakeholders in managing day-to-day logistics operations. Also, the findings show four main process emerging from the qualitative study, which led to the following themes, namely: [i] procurement; [ii] production; [iii] order fulfillment; and [iv] transport and distribution. Conclusion: The adopted qualitative methodology provided rich information that will lead the future research. In brief, this study has contributed new knowledge to the existing literature in aqua logistics and will benefit the future studies.
    Produkcja ryb słodkowodnych rozwija się szybko i zyskuje coraz większe znaczenie. Intensywny system logistyczna wymaga dobrej obsługi dostaw ze względu na łatwą podatność na psucie się oferowanych produktów. Proces zaczyna się od momentu połowu aż do dostawy do końcowego konsumenta. Obejmuje swoim zasięgiem wielu uczestników, budujących wydajny łańcuch dostaw. Aczkolwiek nadal jest mało dostępnej wiedzy na temat procesu realizowanego przez malezyjskich przedsiębiorców tej branż podczas czynności w obrębie całego łańcucha logistycznego. Celem pracy jest pogłębienie i rozszerzenie wiedzy w tym obszarze. Metody: Do badania wykorzystano grupy fokusowe 12 przedsiębiorstw związanych z badaną działalnością w celu analizy problemu. Wyniki: Prezentowane badania wykazały powiązania wartościowe pomiędzy uczestnikami łańcucha dostaw w obrębie aqua-przemysłu, które dostarczają specyficznych rekomendacji uczestnikom łańcucha w codziennych operacjach logistycznych. Dodatkowo wyodrębniono cztery główne procesy związane z następującymi obszarami: zakupy, produkcja, realizacja zamówień oraz transport i dystrybucja. Wnioski: Zastosowana metodologia jakościowa dostarczyła obfitej informacji, które będzie wykorzystana w kolejnych pracach. Rozszerza ona istniejący stan wiedzy na temat aqua-logistyki i stanowi bazę dla przyszłych badań.
    Źródło:
    LogForum; 2021, 17, 2; 287-298
    1734-459X
    Pojawia się w:
    LogForum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioaccumulation of Heavy Metals in Mackerel and Red Hybrid Tilapia Collected From
    Autorzy:
    Dabwan, Ahmed H. A.
    Saluddin, Ummu Asma’ Hafifah Bt. Mohmad
    Isa, Nursuhaili Bt. Mohd
    Abdullah, Abdul Hadi
    Mohamed, Amri Bin Hj.
    Ahmad, Anuar Bin
    Powiązania:
    https://bibliotekanauki.pl/articles/27314829.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    heavy metals
    biomonitoring
    oreochromis niloticus
    Rastrelliger kanagurta
    Oreochromis niloticus
    metale ciężkie
    ekosystem morski
    makrela indyjska
    tilapia
    Opis:
    The major goal of this study is to determine the bioaccumulation of heavy metals in the tissues and bones of Red Hybrid Tilapia (Oreochromis niloticus) and Mackerel (Rastrelliger kanagurta) taken from two distinct sites in Terengganu state, Malaysia, namely Kijal and Paka. Zinc (Zn), copper (Cu), nickel (Ni), and lead (Pb)were the metals examined. Soil analysis also was carried out for the same elements. The tissues and bones of the fishes were separated before further analysis was made. Drying process technique was used to determine the moisture content for all samples at 80°C for 24 hours. Water content ranged between 70 & 77%. Triplicate samples were evaluated by using Atomic Absorption Spectrophotometer (AAS) to find out heavy metals concentration. Oven and Teflon beakers were used to fully digest all solid samples at 120oC for 3 hours. Highest readings of Zn, Ni and Pb were found in the fish bone for the samples collected from both mentioned locations. However, different pattern was noticed for Cu where higher values were found in the tissues for the same samples. Values of Pb in the tissues were higher than the acceptable value in edible fish by Food and Agriculture Organization (FAO); 1 ppm and Malaysian Food Act (MFR) & World Health Organization (WHO); 2 ppm, whereas values of Cu, Zn were in the acceptable range set by the same organizations. No values recommended for Ni by MFR. In general heavy metals in the bones and tissues from both locations can be sorted in descending order as follows; Pb>Zn>Cu>Ni. Soil samples collected from both locations showed different pattern where high concentration was found for Zn followed by Pb then Cu and Ni. Moreover analysis for soil samples collected from Paka River showed higher content for all elements compared to Kijal. More investigation is needed to clarify whether this contamination is solely from industry or due to geology of the area.
    Źródło:
    Civil and Environmental Engineering Reports; 2022, 32, 4; 270--281
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie koncentracji kadmu, cynku, manganu i niklu w filetach wybranych gatunków ryb konsumpcyjnych
    Comparison of cadmium, zinc, manganese and nickel concentrations in fillets of selected species of food fish
    Autorzy:
    Luszczek-Trojnar, E.
    Bloniarz, P.
    Winiarski, B.
    Drag-Kozak, E.
    Popek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/843729.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Zootechniczne
    Tematy:
    ryby
    tilapia
    sum rekini
    mintaj
    pstrag teczowy
    mieso ryb
    filety rybne
    metale ciezkie
    kadm
    cynk
    mangan
    nikiel
    koncentracja metali
    Opis:
    Celem pracy było porównanie koncentracji kadmu, cynku, manganu i niklu w filetach popularnych gatunków ryb konsumpcyjnych dostępnych na rynku polskim: sprowadzanych z hodowli prowadzonych w Azji – tilapii nilowej i pangi, jednego z gatunków ryb morskich – dziko żyjącego mintaja, oraz pochodzącego z rodzimej hodowli pstrąga tęczowego. Uzyskane wyniki wskazują, że najwyższe poziomy kadmu występują w mięśniach pangi i tilapii nilowej. Najwyższe poziomy cynku, manganu i niklu obserwowano w tkance mięśniowej mintaja, co potwierdza pogląd, że ryby morskie są cennym źródłem mikroelementów w diecie człowieka. Jednak najkorzystniejsze proporcje koncentracji badanych metali odnotowano u pstrąga, gdzie wykazano najniższe poziomy kadmu i niklu – metali należących do szczególnie szkodliwych dla środowiska wodnego, a jednocześnie istotnie wyższe niż u pangi i tilapii poziomy cynku i manganu. Uzyskane wyniki pozwalają stwierdzić, że spośród badanych gatunków pstrąg potokowy jest najbezpieczniejszym dla konsumenta źródłem mikroelementów.
    The aim of the study was to compare the concentration of cadmium, zinc, manganese and nickel in fillets of four popular fish species available on the Polish market: Nile tilapia and pangasius imported from fish farms in Asia; pollock, a marine fish species living in the wild; and rainbow trout farmed domestically. The highest cadmium levels were found in the muscles of pangasius and Nile tilapia. The highest levels of zinc, manganese and nickel were observed in the muscle tissue of pollock, which supports the view that marine fish are a valuable source of micronutrients in the human diet. However, the best ratio of concentrations of the metals analysed was noted in trout, which had the lowest levels of cadmium and nickel, which are particularly harmful to the aquatic environment, and significantly higher levels of zinc and manganese than in pangasius and tilapia. The results obtained in the study indicate that trout is the safest source of micronutrients for the consumer.
    Źródło:
    Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2015, 11, 1
    1733-7305
    Pojawia się w:
    Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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