Influence of net cage fish cultures on the diversity of the zooplankton community in the Furnas hydroelectric reservoir, Areado, MG, Brazil

2009 ◽  
Vol 40 (7) ◽  
pp. 753-761 ◽  
Author(s):  
Renata M dos Santos ◽  
Giseli S Rocha ◽  
Odete Rocha ◽  
Maria José Santos Wisniewski
Keyword(s):  
Zooplankton Community ◽  
Hydroelectric Reservoir ◽  
Net Cage ◽  
Cage Fish

scholarly journals Influence of net-cage fish farming on zooplankton biomass in the Itá reservoir, SC, Brazil

2012 ◽  
Vol 23 (4) ◽  
pp. 357-367 ◽  
Author(s):  
Bruna Roque Loureiro ◽  
Christina Wyss Castelo Branco ◽  
Evoy Zaniboni Filho
Keyword(s):  
Fish Farming ◽  
Dry Weight ◽  
Control Area ◽  
Zooplankton Biomass ◽  
Total Density ◽  
Total Zooplankton ◽  
Net Cage ◽  
Uruguay River ◽  
Cage Fish ◽  
Total Zooplankton Biomass

OBJECTIVES: This study aimed to verify the influence of net-cage fish farming on zooplankton biomass in the Itá reservoir (Uruguay River, Brazil). METHODS: Samples were collected monthly from October/2009 to May/2010 at the surface and at the bottom in two sampling stations, the net-cage area and in a control area using a Van Dorn bottle and a plankton net (68 µm). RESULTS: The Cladocera and Copepoda biomass was estimated by dry weight using a micro-analytical balance, and the Rotifera biomass by Biovolume. Total zooplankton biomass varied between 6.47 and 131.56 mgDW.m-3 Calanoida copepod presented the highest value of biomass (127.56 mgDW.m-3) and rotifers, despite having an important contribution to total density, showed a maximum biomass of 2.01 mgDW.m-3. Zooplankton biomass at the net-cage area surface was higher when compared with the control area during the months of October to January. However, the zooplankton biomass was similar at the bottom of the two areas throughout the studied period. From February until May, zooplankton biomass decreased in both sampling stations, a fact probably associated with the flushing of the reservoir, followed by an increase in water transparency and a decrease in chlorophyll-a concentration in the following months (February to May). CONCLUSIONS: The influence of fish farming on zooplankton biomass was detected at the surface of the net-cage area only from October to January. From February to May this influence was not found, probably by the influence of the flushing of the reservoir.

Benthic Respiration and Nutrient Release Associated with Net Cage Fish and Longline Oyster Aquaculture in the Geoje-Tongyeong Coastal Waters in Korea

2019 ◽  
Vol 43 (3) ◽  
pp. 589-601 ◽  
Author(s):  
Sung-Han Kim ◽  
Hyung Chul Kim ◽  
Sang-Hwa Choi ◽  
Won-Chan Lee ◽  
Rae-Hong Jung ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Nutrient Release ◽  
Benthic Respiration ◽  
Oyster Aquaculture ◽  
Net Cage ◽  
Cage Fish

scholarly journals Tinjauan Fikih Muamalah Terhadap Sistem Bagi Hasil Usaha Keramba Jaring Apung Desa Merangin Kecamatan Kuok Kabupaten Kampar

2020 ◽  
Vol 2 (1) ◽  
pp. 51-62
Author(s):  
Budiman Budiman ◽  
Daharmi Astuti
Keyword(s):  
Qualitative Analysis ◽  
Direct Observation ◽  
Local Community ◽  
Field Research ◽  
Legal Aspects ◽  
Profit Sharing ◽  
Analysis Approach ◽  
Net Cage ◽  
Net Cages ◽  
Cage Fish

Purpose: This study aims to determine the contract system used and the profit-sharing system of floating net cages in Merangin Village, Kuok District, Kampar Regency. Method: field research using a descriptive qualitative analysis approach. Data collected through interviews and direct observation. Finding: the results of the study revealed that in the practice of floating net cage fish cages between cage owners and employees namely Syirkah Mudharabah, in terms of the legal aspects of the Mudharabah Syirkah, the Rukun Syirkah Mudharabah, Terms, Principles, Contracts and Profit Sharing (profits and losses) that contained in the study of Muamalah Jurisprudence. Implication: socialization about business cooperation needs to be carried out in the perspective of the Shari'ah by relevant parties, to increase the understanding of the local community about the concept of business cooperation following Islamic Shari'ah

scholarly journals ANALISIS PEMANFAATAN DANAU SENTANI UNTUK PENGEMBANGAN BUDIDAYA KERAMBA JARING APUNG SECARA BERKELANJUTAN

2019 ◽  
Vol 2 (1) ◽  
pp. 23-26
Author(s):  
Iman Djuniawal ◽  
Suryawati Salam ◽  
Sri Mulyani
Keyword(s):  
Environmental Parameters ◽  
Fish Farming ◽  
Observation Station ◽  
East Central ◽  
Survey Techniques ◽  
West Region ◽  
Net Cage ◽  
The Right ◽  
Internal And External Factors ◽  
Cage Fish

Penelitian ini bertujuan untuk menganalisis lingkungan internal dan eksternal yang mempengaruhi pengembangan budidaya ikan dan mengkaji strategi yang tepat dalam usaha pengembangan budidaya ikan karamba Jaring apung di Danau Sentani Jayapura, dilaksanakan selama tiga bulan dari Bulan Juni sampai Agustus 2019. Metode yang dilakukan dengan teknik survei melalui observasi dan wawancara mendalam dengan stakeholder terdiri dari pembudidaya, masyarakat pemanfaat dan pemerintah terkait, dianalisis dengan scoring dan SWOT pada sembilan titik stasiun pengamatan berbeda mewakili areal Timur, Tengah dan Barat danau Sentani. Hasil penelitian menunjukkan parameter lingkungan perairan pada wilayah Timur dan Tengah danau Sentani yaitu distrik Puay dan Asei kecil masih layak untuk pengembangan budidaya  Karamba Jaring Apung, berbeda pada wilayah Barat di sekitar Simporo beberapa parameter lingkungan budidaya menunjukkan kurang layak.  Faktor Internal dan eksternal dengan cara peningkatkan pemahaman kelompok budidaya akan pentingnya pemanfaatan sumberdaya danau berpengaruh terhadap pengembangan budidaya karamba jaring apung di danau Sentani. Penguatan sinergitas antara pembudidaya dan kolaboratif dengan berbagai pihak merupakan strategi yang tepat untuk mendorong peningkatan pendapatan dan kesejahteraan pembudidaya      This study aims to analyze the internal and external environment that affect the development of fish culture and assess the right strategy in the development of floating net cage fish farming in Sentani Lake Jayapura, carried out for three months from June to August 2019. The method is carried out by survey techniques through In-depth observations and interviews with stakeholders consisting, beneficiary communities and relevant government, were analyzed by scoring and SWOT at nine different observation station points representing the East, Central and West areas of Lake Sentani. The results showed that the environmental parameters of the waters in the East and Central Sentani lakes, namely the districts of Puay and Asei small, were still suitable for the development of floating net Karamba cultivation, differing in the West region around Simporo, some parameters of the aquaculture environment showed that they were less feasible. Internal and external factors by increasing the understanding of aquaculture groups on the importance of the use of lake resources influence the development of floating net cage cultivation in Lake Sentani. Strengthening synergy between farmers and collaboratives with various parties is the right strategy to encourage farmers to increase income and welfare

Water quality improvements using aquatic plant cultivation in net cage fish culture

2006 ◽  
Vol 29 (5) ◽  
pp. 2334-2334
Author(s):  
Xie Tian ◽  
Zhu Fushou ◽  
Wang Junsan ◽  
Chen Gang
Keyword(s):  
Water Quality ◽  
Aquatic Plant ◽  
Fish Culture ◽  
Quality Improvements ◽  
Plant Cultivation ◽  
Net Cage ◽  
Cage Fish

scholarly journals Zooplankton community resilience and aquatic environmental stability on aquaculture practices: a study using net cages

2012 ◽  
Vol 72 (1) ◽  
pp. 1-11 ◽  
Author(s):  
JD Dias ◽  
NR Simões ◽  
CC Bonecker
Keyword(s):  
Management Strategies ◽  
Zooplankton Community ◽  
Fish Farming ◽  
Abundant Species ◽  
System Stability ◽  
Environmental Stability ◽  
Production Environment ◽  
Before And After ◽  
Net Cage ◽  
Net Cages

Fish farming in net cages causes changes in environmental conditions. We evaluated the resilience of zooplankton concerning this activity in Rosana Reservoir (Paranapanema River, PR-SP). Samples were taken near the net cages installed at distances upstream and downstream, before and after net cage installation. The resilience was estimated by the decrease in the groups' abundance after installing the net cages. The zooplankton community was represented by 106 species. The most abundant species were Synchaeta pectinata, S. oblonga, Conochilus coenobasis, Polyarthra dolichoptera and C. unicornis (Rotifera), Ceriodaphnia cornuta, Moina minuta, Bosmina hagmanni and C. silvestrii (Cladocera) and Notodiaptomus amazonicus (Copepoda). The resilience of microcrustaceans was affected in the growing points as this activity left the production environment for longer, delaying the natural ability of community responses. Microcrustaceans groups, mainly calanoid and cyclopoid copepods, had a different return rate. The net cage installation acted as a stress factor on the zooplankton community. Management strategies that cause fewer risks to the organisms and maximize energy flow may help in maintaining system stability.

scholarly journals The Impact of Floods on Fish Cultivation Business in Floating Net Cages in Sungai Alang Village, Karang Intan District, Banjar Regency, South Kalimantan

2021 ◽  
Vol 04 (08) ◽  
Author(s):  
Irma Febrianty ◽  
Keyword(s):  
Fish Farming ◽  
Survey Method ◽  
The Social ◽  
Business Analysis ◽  
Flood Disasters ◽  
University Cooperation ◽  
Net Cage ◽  
Net Cages ◽  
The Impact ◽  
Cage Fish

The flood that hit Sungai Alang Village resulted in many floating net cages being lost in the flood, so many farmers lost their cages and caused losses for fish farmers. The aims of the study were to analyze: 1. The economic impact of floating net cage fish cultivators' losses. 2. The impact of social losses experienced by fish farmers. This study uses a survey method, the analysis used is business analysis and descriptive. The results of the analysis of the impact of flooding on fish cultivation in floating net cages in Sungai Alang village: 1. The economic impacts that occur are the loss of cages, loss of fish and damage to nets which result in farmers' losses. 2. The social impacts that occur are affecting the education of family members who continue to university cooperation from the community in dealing with flood disasters, changes in business due to flooding from fish farming in cages to fishing, gardening, cutting sap, raising chickens and selling vegetable.

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