scholarly journals Analisis ekonomi budidaya Ikan Mas (Cyprinus carpio) KJA waduk PLTA Koto Panjang

2021 ◽  
Vol 8 (1) ◽  
pp. 29
Author(s):  
Dukut Tri Sadono ◽  
Darwis AN ◽  
Zulkarnain Umar
Keyword(s):  
Cyprinus Carpio ◽  
Economic Value ◽  
Hydroelectric Power Plant ◽  
Survey Method ◽  
Sampling Location ◽  
Hydroelectric Power ◽  
Financial Feasibility ◽  
Cage Size ◽  
Net Cages ◽  
Method Factors

This study aims to analyze the factors that affect income levels, estimate economic value, analyze financial feasibility and study alternative policies for the development of goldfish (Cyprinus carpio) cultivation in floating net cages in an effort to develop fishery potential in Koto Panjang Hydroelectric Reservoir, Kampar Regency, Riau Province. The sampling location is determined based on (purposive sampling). The method used in this research is a survey method. Determination of the population in the study using the Census method. Factors that significantly influence the income of goldfish cultivators (Cyprinus carpio) at the real level α = 5% are the yield (HP) kg / unit and the number of cages (JK) unit. The surplus value of goldfish cultivation producers (Cyprinus carpio) is IDR 42,102,269,258.00 / year. The results of the analysis of the financial feasibility value (NPV) of Rp. 77,136,617.10, - / unit for the volume of cages 6 x 6 x 4. Whereas for the volume of cages 6 x 8 x 4, it has a value (NPV) which is much greater than Rp. . 173,394,632.39, - / unit. The second value (NPV) is positive based on the criteria for a feasible business investment if the value (Net B / C) is greater than 1, the value (IRR) is the same as 12.00% for both cage size categories. The sensitivity analysis shows that the cultivation of goldfish (Cyprinus carpio) KJA in the Koto Panjang Hydroelectric Power Plant is more sensitive to changes in decreased production compared to changes in decreasing price of carp feed (Cyprinus carpio). Based on the Exponential Comparative Analysis (MPE), it is found that the best alternative development policies to be developed and implemented are capital strengthening and improvement of facilities and infrastructure related to fish cultivation development.

scholarly journals Identifikasi Dan Prevalensi Ektoparasit Ikan Kerapu Lumpur (Epinephelus tauvina) Pada Keramba Jaring Apung Di Kuala Langsa

2021 ◽  
Vol 5 (1) ◽  
pp. 37-43
Author(s):  
Asha Annur ◽  
Suri Purnama Febri ◽  
Muhammad Syahril
Keyword(s):  
Marine Fish ◽  
Prevalence Rate ◽  
Attack Rate ◽  
Research Method ◽  
Economic Value ◽  
Survey Method ◽  
Gill Lamella ◽  
Prevalence Rates ◽  
Purposive Sampling ◽  
Net Cages

Greasy grouper (Epinephelus tauvina) is one type of marine fish that has economic value and can be developed into a promising cultivation commodity. The purpose of this research is to find Types of parasites and prevalence rates of ectoparasite in Greasy grouper (Epinephelus tauvina) on floating net cages in Kuala Langsa. The research method was conducted using a survey method. Sample taken by purposive sampling, amounting to 20 Greasy grouper (Epinephelus tauvina)  with a size of 20-25cm and were observed at Laboratory Faculty of Agriculture, Samudra University. Fish body organs were observed including all parts of the fins, mucus, gills, then identification using microscopic and macroscopic methods. The results obtained were ectoparasites infecting Greasy grouper (Epinephelus tauvina) only one species from the genus Dactylogyrus which was found mostly in floating net cages cultivation in Kuala Langsa. These ectoparasite were found in the gill lamella Greasy grouper (Epinephelus tauvina), with the overall sample prevalence rate at 50% and the attack rate classified as “very frequent”.

scholarly journals Prevalensi Ektoparasit Yang Menyerang Benih Ikan Koi (Cyprinus carpio) Di Bursa Ikan Hias Surabaya [The Prevalence Of Ectoparasits That Attack The Seed Of Koi Fish In The Stock Of Ornamental Fish Surabaya]

2019 ◽  
Vol 5 (1) ◽  
pp. 113
Author(s):  
Novy Prasetya, Sri Subekti, Kismiyati
Keyword(s):  
Cyprinus Carpio ◽  
Prevalence Rate ◽  
Economic Value ◽  
Ornamental Fish ◽  
Added Value ◽  
Fish Pond ◽  
Survey Method ◽  
Fish Stock ◽  
Disease Agent

Abstract As the commodity grown, ornamental fish has an interesting added value. Many things can serve as a supporting factor in conducting the business of ornamental fish, such as having economic value and many enthusiasts who already spread to the whole society. One major problem in the cultivation of ornamental fish in Indonesia to this day is about the disease. One of the diseases that often strike in the ornamental fish pond is parasiter disease. In anticipation of losses due to parasitic attacks on fish, is necessary to identify types of ectoparasites that attack the seed of koi fish. This is done sejal early, so that the seeds are already carrying the disease agent could negatively impact on the enlargement and not widespread. The purpose of this study was to determine the type of ectoparasites that attack koi fish and find out the prevalence of ectoparasites that attack koi fish (Cyprinus carpio) in East Java at Prapen Surabaya The method used is a survey method for gathering informationfrom most of the population is considered to represent a particular population. Types of ectoparasites found were Trichodina sp., Chilodonella sp., Myxobollus sp., Ichtyopthirius multifilis, Dactylogyrus sp, Gyrodactylus sp., And Argulus japonicus. Prevalence rate of ectoparasites that infested fish Koi (Cyprinus carpio) in Surabaya fish stock is Trichodina sp. 84%, Chilodonella sp. 31%, Myxobollus sp. 17%, Ichtyopthirius multifilis 4%, 13% Dactylogyrus sp., Gyrodactylus sp. 7% and Argulus sp. 14%.

Water Level Control of Small-scale Hydroelectric Power Plant

2002 ◽  
Vol 122 (6) ◽  
pp. 989-994
Author(s):  
Shinichiro Endo ◽  
Masami Konishi ◽  
Hirosuke Imabayashi ◽  
Hayami Sugiyama
Keyword(s):  
Power Plant ◽  
Water Level ◽  
Hydroelectric Power Plant ◽  
Small Scale ◽  
Hydroelectric Power ◽  
Level Control

Hydroelectric Power-Plant Simulator Implemented in Python

2021 ◽  
Author(s):  
Michal Kuchar ◽  
Adam Peichl ◽  
Milan Kucera ◽  
Jaromir Fiser ◽  
Pavel Kulik ◽  
...  
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power

scholarly journals Dynamics of Lady’s slipper orchid (Cypripedium calceolus L.) population at Lake Kwiecko (West Pomerania)

2014 ◽  
Vol 36 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Maciej Korczyński ◽  
Ewa Krasicka-Korczyńska
Keyword(s):  
Power Plant ◽  
Endangered Species ◽  
Rare Species ◽  
Negative Impact ◽  
Good Condition ◽  
Hydroelectric Power Plant ◽  
Field Observations ◽  
Hydroelectric Power ◽  
Cypripedium Calceolus ◽  
Slipper Orchid

Abstract Cypripedium calceolus is considered an endangered species in the territory of Poland. Population of this rare species, situated at Lake Kwiecko (Western Pomerania), was regularly monitored in the years 1986-2013. The studied population has been under the permanent influence of the nearby hydroelectric power plant for almost 45 years. The field observations showed that the power plant had no negative impact on the condition of Cypripedium calceolus population. An indication of its good condition was, among others, an increase in the size - from 150 to 350 specimens within the study period.

Application of Intelligent Technological Systems in Order to Increase Efficiency of the Lock Chamber System in Hydro Power Plants

2015 ◽  
Vol 806 ◽  
pp. 64-73
Author(s):  
Aleksandar Vujović ◽  
Zdravko Krivokapić ◽  
Jelena Jovanović
Keyword(s):  
Power Plants ◽  
Hydroelectric Power Plant ◽  
Global Market ◽  
Real System ◽  
Hydroelectric Power ◽  
Initial State ◽  
Hydro Power ◽  
Lock Chamber ◽  
Levels Of Automation ◽  
Hydro Power Plants

The paper is a result of research at the Mechanical Engineering Faculty in Podgorica and represents the aspiration of authors to combine scientific and technical experience in order to achieve improvement in a real system. It is a complex system of lock chambers in a hydroelectric power plant. Based on a detailed analysis of the initial state, through the process modeling of complex real system, the authors identify possible areas where the intervening and applying modern systems with greater flexibility is necessary to achieve higher levels of automation. Also, proposed in the paper are measures for ensuring the security of information that rise system performance to a higher level compared to the competition and create an advantage in the global market.

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