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Wyświetlanie 1-15 z 76
Tytuł:
Effect of Adding Pumpkin Flour and Carrot Flour on Changes in Color Intensity of Goldfish (Carassius auratus L.) Strain Oranda
Autorzy:
Ahlam, Rian Nur
Lili, Walim
Hamdani, Herman
Rosidah, Rosidah
Bangkit, Ibnu
Powiązania:
https://bibliotekanauki.pl/articles/1076642.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Faculty of Fisheries and Marine Sciences
Indonesia
Padjadjaran University
Sumedang
West Java
Opis:
Goldfish is one of the most famous ornamental fish because of its body shape and color which was interesting to be maintained. The purpose of this research was to find the optimum dose of pumpkin and carrot flour combination on artificial feed to increase color brightness of goldfish. Complete Randomized Design with four treatments and four replications were used in the experiment. For the treatments, pumpkin flour 15%, pumpkin flour 7.5% with carrot flour 2.5% and carrot flour 5%, were studied. The parameters observed were color intensity, survival rate, and water quality. The results showed that supplementation of combination of pumpkin flour 7.5% with carrot flour 2.5% gave the highest color intensity of goldfish with TCF code 0815 and score 2.11 with 100% survival rate. Water qualities during the research were still in optimal condition.
Źródło:
World News of Natural Sciences; 2019, 26; 52-60
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Different Additions of Carbon Dioxide on Growth, Lipids, Carotenoids and Chlorophyll-a of Chaetoceros calcitrans
Autorzy:
Amaliandini, Esza Rezky
Nashrullah, Syarif
Larasati, Anastasya Dewi
Taufan, Fajar
Sari, Luthfiana Aprilianita
Dewi, Nina Nurmalia
Arsad, Sulastri
Musa, Nadirah
Powiązania:
https://bibliotekanauki.pl/articles/2202339.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sustainable fisheries
marine
water quality
pollution
air
microalgae
plankton
Opis:
Global warming gives phytoplankton a significant role in reducing carbon. C. calcitras is a phytoplankton which utilizes carbon dioxide for growth and the formation of secondary metabolites in order to survive. The purpose of this study was to determine the effect of differences in duration on growth, lipid content, carotenoids and chlorophyll-a in C. calcitrans and to determine the optimal duration. An experimental method with statistical analysis using ANOVA was used in this study. The treatments implemented were the addition of carbon dioxide for 0, 2, 4, 6, 8, 10, 12, and 14 minutes with a volume of carbon dioxide addition of 3 bps. The results showed that the addition of carbon dioxide had a significant effect (P<0.05) on the value of lipids, growth, carotenoids and chlorophyll-a. The highest density value was obtained in Treatment for 2 minutes to increase growth with the highest total value of 2,927,500 cells/ml. The best treatment to increase lipids was Treatment for 12 minutes with lipid content of 63.33% and lipid productivity of 1.82 mg/l/day. The best treatment to increase carotenoid content was Treatment for 4 minutes with carotenoid content of 2.20 g/mL and chlorophyll-a content of 1.4431 g/mL. Optimal treatment differences to obtain the highest value of each parameter differ from each other, depending on the synthesis and physiological processes of C. calcitrans.
Źródło:
Journal of Ecological Engineering; 2023, 24, 1; 289--298
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis Fishermen Term of Trade in Pangandaran Subdistrict of Pangandaran Regency
Autorzy:
Anna, Zuzy
Rizal, Achmad
Anitaningrum, Meiti
Powiązania:
https://bibliotekanauki.pl/articles/1076025.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Fisheries
Fisherman's Household
Pangandaran
Term of trade of Fishermen
Welfare
Opis:
Fisheries are one of the agricultural sub-sectors that have abundant natural resources and high production value, but that does not make small fishermen prosper. This study aims to determine the level of welfare of capture fishermen households in Pangandaran Sub-district of Pangandaran Regency and the factors that influence it. This study used descriptive basic methods. The research location is in Pangandaran Sub-district of Pangandaran Regency. Sampling takes the accidental sampling method. The data used are primary and secondary data with interview techniques and observations. For the analysis using the Fisher Exchange Rate formula and multiple linear regression analysis. The results showed that the average Term of trade of fishermen in Pangandaran Sub-district was 0.96 or below one (<1). This means that fishermen have not been able to meet household needs and it can be said that fishermen's households are less prosperous. The factors that influence it are the outflow of work time (X2) with the regression coefficient of 0.017 and income (X3) with a regression coefficient of 0.045.
Źródło:
World Scientific News; 2019, 117; 1-13
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Catch of Skipjack Tuna (Euthynnus sp.) in National Fisheries Port Pengambengan, Bali, Indonesia
Autorzy:
Apriliani, Izza Mahdiana
Rizal, Achmad
Hamdani, Herman
Denika, Ayang
Powiązania:
https://bibliotekanauki.pl/articles/1065114.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bali strait
Euthynnus
Thunnus albacares
Thunnus obesus
bigeye tuna
catch per unit effort
monsoon
tuna
yellowfin tuna
Opis:
The Bali Strait has very high pelagic fish resources, ranging from small pelagic fish to large pelagics, one of which is a type of tuna. Skipjack tuna (Euthynnus sp.) is one of the dominant and high economic value fish resources. The composition of fish catch landed in National Fisheries Port (PPN) Pengambengan in 2014 is dominated by small pelagic fish. The composition of the largest fish catches consists of lemuru, skipjack, mackerel and scad. This study aims to look at the production of skipjack tuna and season distribution for 5 years. This information can be used as an effort to manage fisheries in PPN Pengambengan continuously. This research was carried out in the waters of the Bali Strait with fishing base PPN Pengambengan. The catch of skipjack tuna in Bali is fluctuated every month during 2013 until 2017. The average catch is high in 2014, and the lowest catch was in 2016. This was allegedly due to the catches of previous years namely in 2014 – 2015 skipjack tuna fish resources were overexploited. The catch of skipjack tuna based on the season has the highest value in September - November (transition II (intern-monsoon)) and the lowest is in December-February (northwest season).
Źródło:
World Scientific News; 2019, 120, 2; 144-153
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving Fishery Management Models and Methods
Autorzy:
Arnarson, Ingólfur
Jensson, Páll
Powiązania:
https://bibliotekanauki.pl/articles/2037433.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
decision sciences
natural resources
fisheries management
bio-economics
value of time
resource costs
nauki o podejmowaniu decyzji
zasoby naturalne
zarządzanie rybołówstwem
bioekonomia
wartość czasu
koszty zasobów
Opis:
In a dynamic, environment, the decision makers make use of many different resources where two or more can act as substitutes. At each decision moment in time, the market prices will be constant, and the relative prices of accessible resources will determine the economic rationale of the process. Ignoring or downplaying the effects of substitutability of resources in dynamic economic processes may lead to mismanagement of the fish stocks and result in serious economic consequences for the respective fishing industries. For nearly five decades’ fishery managers and policy makers have used bio-economic models and methods as foundation for their management schemes. These models and methods are for the most based on the deductive methodology of economics where central assumptions are the metaphors of “equilibrium“ and “bio-economic equilibrium“. Models based on equilibrium theories are usually deterministic where dynamics of the markets are a meager part of the problem. Less attention has been offered to inductive reasoning and modeling within the field of fishery management. The inductive method of reasoning is often based on facts and actual observations within the industries, a methodology widely used by engineers and the field of business administration. In this paper, we introduce and integrate the concept of substitutability of economic resources into a traditional bio-economic model. The results show that fishery management, which bases decisions solely on traditional bio-economic models where the dynamics and consequences of the operational decision processes of the industry are ignored, may reach decisions that work opposite of their intention.
Źródło:
Decision Making in Manufacturing and Services; 2020, 14, 2; 131-143
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibrio cholerae Test on Fishery Products at Cirebon Test and Application of Fishery Products Technical Unit Agency, West Java, Indonesia
Autorzy:
Azhari, Aqila Mutiara Rizqyani
Apriliani, Izza Mahdiana
Syarifuddin, M.
Powiązania:
https://bibliotekanauki.pl/articles/1075702.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Vibrio cholerae
bacteria
fisheries product
microbiology test
seafood
Opis:
Fiheries products that will be exported or marketed domestically, must have the specified food safety criteria. One of the criteria that the products is safe to be marketed and consumed is free from the presence of pathogenic bacteria. One of the common pathogenic bacteria found in food is Vibrio cholerae. The purpose of this research aims to examine, isolate and confirm the presence of dangerous pathogenic bacteria V. cholerae which shouldn’t exist in fisheries products with sample Frozen cuttle fish, frozen baby octopus small cut and Pasteurized crab meat. This research was held from July-August 2018 at Cirebon Test and Application of Fishery Products Technical Unit Agency. Data is collected through direct observation or testing in a microbiology laboratory with conventional methods using special media for V. cholerae such as Alkaline Peptone Water (APW) and Thiosulfate Citrate Bile Salts Sucrose (TCBS). The testing is qualitative, so the results obtained are either positive or negative. The results of the research showed that there’s no pathogenic bacteria V. cholerae were found in tested fisheries products so that they were safe to consume and satisfied the standards to be marketed.
Źródło:
World Scientific News; 2019, 119; 192-203
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fisheries Local Action Groups: A New Theme For Researching Maritime Communities
Autorzy:
Bartłomiejski, Robert
Powiązania:
https://bibliotekanauki.pl/articles/520259.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of the article is to outline consequences of Fisheries Local Action Groups (FLAGs) forming and implementing of Common Fisheries Policy by financial support of axis 4 European Fisheries Fund. Central point of the article refers to characteristic of FLAGs in Poland. On this basis, Author indicates two opposite processes in fishing industry: 1) intensive development and rising importance of inland fishing; 2) limitation of maritime fishing. The article attempts to attract scientific environment to establish partnership project for European Research Network and in-depth, international researches on maritime communities.
Źródło:
Roczniki Socjologii Morskiej; 2011, 20; 46-55
0860-6552
Pojawia się w:
Roczniki Socjologii Morskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic significance of the sea fisheries and aquaculture industries
Znaczenie gospodarcze rybołówstwa morskiego i akwakultury
Autorzy:
Berkowska, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/23352296.pdf
Data publikacji:
2023
Wydawca:
Kancelaria Sejmu. Biuro Analiz Sejmowych
Tematy:
fishery
aquaculture
economy
Opis:
The article focuses on the analysis of the importance of fisheries and aquaculture to Poland’s economy. The article presents statistics on the value, employment and budget allocated to fisheries and aquaculture.
Źródło:
Zeszyty Prawnicze BAS; 2023, 2(78); 203-207
1896-9852
2082-064X
Pojawia się w:
Zeszyty Prawnicze BAS
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simple standardisation of omnidirectional sonar in fisheries research through field calibration and sampling data
Autorzy:
Brehmer, P.
Gerlotto, F.
Powiązania:
https://bibliotekanauki.pl/articles/332471.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The paper presents a method making a comparison of acoustic results on schools through the use of omnidirectional sonar (possible). The weakness of such sonar for fisheries acoustics is that there is no practical way to accurately calibrate them, due to the fact that they are not designed specifically for scientific research. The procedure employed is through the use in the field of a reference target allowing to compare the echoes from one beam to the other and to evaluate roughly the operational threshold for school identification. Some results from a calibration achieved on a SIMRAD SR240 in Venezuela, 1998, are detailed.
Źródło:
Hydroacoustics; 2001, 4; 27-30
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of in situ radiated noise of the platform used on shallow water area on echo sounder data in fisheries-acoustics
Autorzy:
Brehmer, P.
Guennegan, Y.
Arzelies, P.
Guillard, J.
Cheret, Y.
Duformentelle, P.
Colon, M.
Powiązania:
https://bibliotekanauki.pl/articles/332717.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
in situ
echo sounder
fisheries
acoustics
Opis:
The shallow water area of the coastal fringes is important to take into consideration in fish stock assessment because a great part of the stock, especially for the small pelagic fish is distributed in this area (20). In shallow water research vessels are prohibited to navigation (usually <20m) and usually only small boats can be used. One of the main source error in acoustics fish sampling is due to the avoidance reaction generated by the three dimensional noise diagram emitted by the boat. In this paper we highlighted the importance of wind direction and strength in the noise diagram emitted by the boat under in situ condition. A comparison of the noise level of two boats (a Research Vessel and a Speedboat equipped of similar echo sounder) has been made before simultaneous records of echo sounder data: the speedboat is more silent as revealed by in situ hydrophone measurement and near the ICES recommendations. The observation of shoal echo sounder descriptors shows an avoidance reaction as expected more important for the noisier boat: there the schools avoid more the research vessel. The avoidance reaction is characterised by a deeper position of the fish school barycentre, in the water column, detected by the research vessel and a shoal minimum depth higher than for the speedboat. The effect of noise diagram difference is clear on the same shoal descriptors, the difference appears for the vertical position of the barycentre and minimum altitude.
Źródło:
Hydroacoustics; 2003, 6; 31-40
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Against the Wind: The Difficult Task of a Fisheries Researcher in the Early 20th Century
Autorzy:
Coelho, Manuel Pacheco
Powiązania:
https://bibliotekanauki.pl/articles/520265.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Jens Warming
Common Property
Fisheries
Regulation
Opis:
In his seminal paper, Gordon (1954) argued that, in a situation of open access and competition, the market would not lead to the most efficient solution in resource use. Almost four decades earlier, in 1911, a Danish economist, Jens Warming, put this issue and made a very similar analysis for the fisheries sector. This research makes a reflection on the proposed explanation for the common property problem and asks what went wrong and why the important achievements of Warming had not the justified academic applause and practical impact.
Źródło:
Roczniki Socjologii Morskiej; 2013, 22; 19-26
0860-6552
Pojawia się w:
Roczniki Socjologii Morskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cod and Tradition. Cultural Effects Of Cod Fisheries in Portugal
Autorzy:
Coelho, Manuel Pacheco
Junqueira Lopes, Rui
Filipe, José António
Ferreira, Manuel Alberto
Powiązania:
https://bibliotekanauki.pl/articles/520252.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Property rights are in the centre of fisheries management difficulties. In the 90s, Portuguese national fishing fleet lost more than 35% of the tonnage, a third of the fishermen, almost 30% of the production. The segment of distant water fisheries, especially of the cod, is accompanying this crisis. In one decade (1976 to 1986) this segment had to face two new restrictions to the development of fisheries: Extended Fisheries Jurisdiction and the integration in the Common Fisheries Policy. After a profound downsizing process we are still confronted with an overcapacity problem, face to the disposable quotas. Anyway, while the stocks rebuild, Public managers cannot stop defining social and cultural support policies for the affected populations and try to maintain the memory and the important traditions associated. One area mostly affected is Ílhavo. “The Sea for Tradition" is the slogan of the City hall that attests well the strong connection of the municipality to the sea. The guidelines for public management highlight the role of fisheries in the local development (anchored in reasons of geographical and historical nature), and the continuous exaltation of the maritime culture, with its maximum expression in the Maritime Museum and in other cultural manifestations of cod-oriented traditions (as religious festivities). The purpose of our paper is to study the socio-economic and cultural impacts of the institutional change in cod Portuguese fisheries.
Źródło:
Roczniki Socjologii Morskiej; 2011, 20; 27-39
0860-6552
Pojawia się w:
Roczniki Socjologii Morskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abiotic factors as a long-term stressor for the vendace fisheries in Lake Ińsko (European Central Plains Ecoregion, Poland)
Autorzy:
Czerniejewski, Przemysław
Strzelczak, Agnieszka
Machula, Sylwia
Martinez-Bracero, Moises
Powiązania:
https://bibliotekanauki.pl/articles/2203568.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
biogens
fish yield
hydrochemical condition
Lake Ińsko
vendace
Opis:
The population of vendace (Coregonus albula L., 1758) in many European lakes, especially in Central Europe, have declined recently as a result of lake eutrophication. The aim of the study was to (i) determine many years’ changes in the volume of vendace catches and specific physicochemical parameters of water, (ii) determine correlations between particular physicochemical parameters, and (iii) indicate hydrochemical parameters which show the greatest impact on the volume of vendace catches on the example of Lake Ińsko located in the European Central Plains Ecoregion. Principal Component Analysis (PCA) was applied to indicate the most important hydrochemical variables impact on vendace fisheries. Among them, after redundancy analysis, 6 were taken into account (total nitrogen, N-NO3, N-NO2, total phosphorus, oxygen concentration, temperature). Time series analysis revealed an increasing trend in nutrients concentration in lake. Analyses showed that fish catches were mostly negatively connected to nitrogen and phosphorus concentration. Trend analysis, based on the above-mentioned parameters, can provide prediction of vendace catches for further years with the predictability at the level of around 60% accuracy. The results of this study are very crucial to the vendace fisheries and for formulating fisheries management policies in the future in the changing hydrochemical condition of lakes.
Źródło:
Journal of Water and Land Development; 2022, Special Issue; 24--33
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stan rybołówstwa na świecie – trendy i prognozy
STATE OF GLOBAL FISHERIES – TRENDS AND PREDICTIONS
Autorzy:
Dabrowska, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/418962.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Gdański. Wydział Ekonomiczny
Tematy:
overfishing
ecosystem
models
food security
Ecopath
Opis:
As human population on Earth has just reached seven billion, food, freshwater and energy supplies are of increasing concern. With fisheries supporting hundreds of millions livelihoods and most of the global capture fisheries production coming from the marine environment, sustainable management of fishing activity based on sound scientific data and reasonable predictions is one of the major issues we face these days. Literature review of the most recent publications on the state of global fisheries was conducted and ten main trends were identified, including expansion of fishing to new ecosystems and species, decline in landings, increase in fishing effort, growth of aquaculture and changes in the abundance and distribution of species. Issues with predicting the future were discussed, as well as usefulness of computer models and possible recovery of the ecosystem.
Źródło:
Współczesna Gospodarka; 2012, 3, 3; 25-36
2082-677X
Pojawia się w:
Współczesna Gospodarka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 76

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