Towards sustainable development of floating net cage culture for income security in rural Indonesia: a case study of common carp production at Lake Maninjau, Indonesia.

Munzir, Abdullah; Heidhues, Franz; Edwards, Peter; Little, David C.; Demaine, Harvey

doi:10.1079/9780851995656.0143

Cited by 6 publications

(2 citation statements)

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“…In Vietnam, fish are raised on agricultural waste products such as rice hulls; this practice is also used in the Philippines (Pekar et al 2002;Prein et al 2002). Cage aquaculture is also employed in the lakes and rivers of Indonesia (Munzir and Heidhues 2002) and China (Lu 1992). Because fish protein is affordable and easy to grow, many of the world's people depend heavily on freshwater fisheries.…”

Section: Socioeconomic Effectsmentioning

confidence: 99%

Potential impacts of global climate change on freshwater fisheries

Ficke

Myrick

Hansen

2007

Rev Fish Biol Fisheries

945

642

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Despite uncertainty in all levels of analysis, recent and long-term changes in our climate point to the distinct possibility that greenhouse gas emissions have altered mean annual temperatures, precipitation and weather patterns. Modeling efforts that use doubled atmospheric CO 2 scenarios predict a 1-78C mean global temperature increase, regional changes in precipitation patterns and storm tracks, and the possibility of ''surprises'' or sudden irreversible regime shifts. The general effects of climate change on freshwater systems will likely be increased water temperatures, decreased dissolved oxygen levels, and the increased toxicity of pollutants. In lotic systems, altered hydrologic regimes and increased groundwater temperatures could affect the quality of fish habitat. In lentic systems, eutrophication may be exacerbated or offset, and stratification will likely become more pronounced and stronger. This could alter food webs and change habitat availability and quality. Fish physiology is inextricably linked to temperature, and fish have evolved to cope with specific hydrologic regimes and habitat niches. Therefore, their physiology and life histories will be affected by alterations induced by climate change. Fish communities may change as range shifts will likely occur on a species level, not a community level; this will add novel biotic pressures to aquatic communities. Genetic change is also possible and is the only biological option for fish that are unable to migrate or acclimate. Endemic species, species in fragmented habitats, or those in east-west oriented systems will be less able to follow changing thermal isolines over time. Artisanal, commercial, and recreational fisheries worldwide depend upon freshwater fishes. Impacted fisheries may make it difficult for developing countries to meet their food demand, and developed countries may experience economic losses. As it strengthens over time, global climate change will become a more powerful stressor for fish living in natural or artificial systems. Furthermore, human response to climate change (e.g., increased water diversion) will exacerbate its already-detrimental effects.Model predictions indicate that global climate change will continue even if greenhouse gas emissions decrease or cease. Therefore, proactive management strategies such as removing other stressors from natural systems will be necessary to sustain our freshwater fisheries.

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Section: Socioeconomic Effectsmentioning

confidence: 99%

Potential impacts of global climate change on freshwater fisheries

Ficke

Myrick

Hansen

2007

Rev Fish Biol Fisheries

945

642

View full text Add to dashboard Cite

show abstract

“…Early research on technical efficiency (TE) in agriculture focused on crop and animal industries; these studies used cross‐sectional data, panel or aggregate data, the production function, the parametric or nonparametric boundary function, and mathematical programming as analytical approaches (Chennareddy ; Sahota ; Lau and Yotopoulos ; Sidhu ; Kumbhakar ; Papadas and Dahl ; Gow and Langemeier ; Alvarez and Arias ; Hoang and Alauddin ). In recent years, the majority of the efficiency studies have centered on TE analysis in aquaculture production (Sharma and Leung ; Sharma ; Sharma et al ; Dey et al ; Munzir and Heidhues ; Icebalcata and Lavergne ; Kaliba and Engle ; Ogundari and Akinbogun ; Huang ); however, these models are seldom used to research cost or economic efficiency. Therefore, Iliyasu et al () suggested that future research should estimate all three efficiency indices (i.e., TE, allocative efficiency [AE], and economic efficiency).…”

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confidence: 99%

Effects of Culture Area, Stocking Density, and Shrimp and Fish Polyculture on the Cost Efficiency of Hard Clam, Meretrix meretrix, Culture: A Case Study of Hard Clam Farms in Yunlin, Taiwan

Huang

Chou

Lee

et al. 2016

J World Aquaculture Soc

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Using the hard clam farms in Yunlin, Taiwan as examples, this study analyzes the effects of culture area, stocking density, and shrimp and fish polyculture on the cost efficiency (CE) of hard clam farming. A data envelopment analysis (DEA) is used to estimate the farms' technical efficiency (TE), allocative efficiency (AE), and CE values. The findings show that the mean TE, AE, and CE values of hard clam farms are 0.74, 0.57, and 0.43, respectively. The TE value is higher than the AE value, which indicates that cost inefficiency is mainly attributable to poor AE. Tobit regression results suggest that there are positive relationships between CE and both culture area and operator experience. Hard clam stocking density and age of the operators have negative effects on CE. Hard clam culture areas larger than 2 ha and a stocking density of 1.1-1.2 million hard clams per hectare have higher CEs than smaller culture areas and smaller or larger stocking densities. The use of sand shrimp, white shrimp, kuruma shrimp, and grass shrimp for polyculture and the use of milkfish and silver sea bream for polyculture are both associated with high CEs.The hard clam is one of the main types of shellfish cultured in Taiwan, and its output is highest among cultured shellfish. With an output of 34,755 MT in 2013, Yunlin County is the primary producer of hard clams in Taiwan: Yunlin contains the largest culture area in Taiwan, produces almost 60% of Taiwan's hard clam supply and yields output values as high as 77.25 million USD. Hard clam cultivation has become a 1 Correspondence to: jmlee866@yahoo.com.tw main source of income for the fishermen of Yunlin County.In the past, most Yunlin hard clam farms relied on monoculture. However, the growth of hard clam output has resulted in decreases in the price of hard clams in recent years. Consequently, farms must continuously increase the cost efficiency (CE) of hard clam culture to reduce costs and increase profits. improves the ecosystem balance of the culture ponds by reducing the quantity and precipitates of organic matter in the culture ponds (Smith 1985;Smith and Piedrahita 1988;Shpigel and Blaylock 1991;Yokoyama et al. 2002;Nhan 2007;Martinez-Porchas et al. 2010). Taiwan's hard clam farms primarily co-culture hard clams with milkfish, grass shrimp, sand shrimp, white shrimp, and kuruma shrimp. Recent increases in the demand for shrimp have increased the price of shrimp, which has prompted hard clam farms to increase the quantity of shrimp species in polyculture operations.Previous studies have successively researched the culture growth rate, culture environment factors, and disease control for the polyculture of shrimp, fish, and mollusk species (McLarney 1976;Costa-Pierce et al. 1984;Lui 1989;Zhang and Wang 1990;Lui et al. 1992;Chang et al. 1994;Yu et al. 1996;Handå et al. 2012). The polyculture of freshwater prawns and fishes is feasible in the USA (Buck et al. 1981;Costa-Pierce et al. 1984;Bessa Junior et al. 2012), and shrimp ponds have been used in the USA to overwinter c...

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Rural areas

Demaine

2018

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Towards sustainable development of floating net cage culture for income security in rural Indonesia: a case study of common carp production at Lake Maninjau, Indonesia.

Cited by 6 publications

References 0 publications

Potential impacts of global climate change on freshwater fisheries

Potential impacts of global climate change on freshwater fisheries

Effects of Culture Area, Stocking Density, and Shrimp and Fish Polyculture on the Cost Efficiency of Hard Clam, Meretrix meretrix, Culture: A Case Study of Hard Clam Farms in Yunlin, Taiwan

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