Aquaculture: Relevance, distribution, impacts and spatial assessments – A review

Ottinger, Marco; Clauss, Kersten; Kuenzer, Claudia

doi:10.1016/j.ocecoaman.2015.10.015

Cited by 347 publications

(205 citation statements)

References 132 publications

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“…By 2014, only small patches along the river plains further from the coast are still classified as rice. We suspect that this might be due to rice paddies being converted to other crops and possibly conversion to aquaculture ponds, since the southeast coast of China is the World's leading aquaculture region [72]. Figure 8c shows the plain at Beimin Lake in Hunan province, which was dominated by rice agriculture in 2002 and saw a constant decrease on overall paddy rice area throughout the years we studied.…”

Section: Rice Area Changementioning

confidence: 98%

Mapping Paddy Rice in China in 2002, 2005, 2010 and 2014 with MODIS Time Series

2016

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Abstract:Rice is an important food crop and a large producer of green-house relevant methane. Accurate and timely maps of paddy fields are most important in the context of food security and greenhouse gas emission modelling. During their life-cycle, rice plants undergo a phenological development that influences their interaction with waves in the visible light and infrared spectrum. Rice growth has a distinctive signature in time series of remotely-sensed data. We used time series of MODIS (Moderate Resolution Imaging Spectroradiometer) products MOD13Q1 and MYD13Q1 and a one-class support vector machine to detect these signatures and classify paddy rice areas in continental China. Based on these classifications, we present a novel product for continental

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Section: Rice Area Changementioning

confidence: 98%

Mapping Paddy Rice in China in 2002, 2005, 2010 and 2014 with MODIS Time Series

2016

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“…Aquaculture development often requires the enclosure of the coastal and riparian commons, which can displace users of these systems, notably in mangrove forest systems and on floodplains (Beitl, 2011;Sultana, 2012). Appropriate oversight to minimize environmental damage must be considered so as to limit the pollution and habitat destruction often connected to aquaculture production systems (Ottinger et al, 2016). While recent studies suggest aquaculture growth and capture fisheries sustainability may not represent a zero-sum game, the trade-offs for nutritionally vulnerable populations are as yet unclear (Naylor et al, 2009).…”

Section: Challenges and Opportunities In Providing For Those At Riskmentioning

confidence: 99%

Does Aquaculture Support the Needs of Nutritionally Vulnerable Nations?

et al. 2017

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Aquaculture now supplies half of the fish consumed directly by humans. We evaluate whether aquaculture, given current patterns of production and distribution, supports the needs of poor and food-insecure populations throughout the world. We begin by identifying 41 seafood-reliant nutritionally vulnerable nations (NVNs), and ask whether aquaculture meets human nutritional demand directly via domestic production or trade, or indirectly via purchase of nutritionally rich dietary substitutes. We find that a limited number of NVNs have domestically farmed seafood, and of those, only specific aquaculture approaches (e.g., freshwater) in some locations have the potential to benefit nutritionally vulnerable populations. While assessment of aquaculture's direct contribution via trade is constrained by data limitations, we find that it is unlikely to contribute substantially to human nutrition in vulnerable groups, as most exported aquaculture consists of high-value species for international markets. We also determine that subpopulations who benefit from aquaculture profits are likely not the same subpopulations who are nutritionally vulnerable, and more research is needed to understand the impacts of aquaculture income gains. Finally, we discuss the relationship of aquaculture to existing trends in capture fisheries in NVNs, and suggest strategies to create lasting solutions to nutritional security, without exacerbating existing challenges in access to food and land resources.

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“…Aquaculture is one of the fastest growing food production sectors worldwide, an important food supply in many countries, main protein source for hundreds of million people and in the spotlight for its potential to support future food security at global scale [1]. According to the Food and Agriculture Organization of the United Nations (FAO) human consumption of farmed species exceeded that of capture fisheries for the first time in 2014 [2].…”

Section: Introductionmentioning

confidence: 99%

“…In East and Southeast Asia, more and more farmers shift from traditional rice farming to more profitable aquaculture or hybrid rice-shrimp or rice-fish systems [3] to generate more income. The rapid growth of aquaculture (see Figure 1) coincides with an increased input of feeds (fish oil and fish meal), and use of antibiotics, pesticides and other chemicals [1,4]. Although aquaculture has many positive impacts on local livelihoods, poverty reduction, nutrition, and regional economy, it is also responsible for increased environmental degradation and biodiversity loss.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Assessment of Coastal Aquaculture Ponds with Sentinel-1 Time Series Data

2017

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Abstract:We present an earth observation based approach to detect aquaculture ponds in coastal areas with dense time series of high spatial resolution Sentinel-1 SAR data. Aquaculture is one of the fastest-growing animal food production sectors worldwide, contributes more than half of the total volume of aquatic foods in human consumption, and offers a great potential for global food security. The key advantages of SAR instruments for aquaculture mapping are their all-weather, day and night imaging capabilities which apply particularly to cloud-prone coastal regions. The different backscatter responses of the pond components (dikes and enclosed water surface) and aquaculture's distinct rectangular structure allow for separation of aquaculture areas from other natural water bodies. We analyzed the large volume of free and open Sentinel-1 data to derive and map aquaculture pond objects for four study sites covering major river deltas in China and Vietnam. SAR image data were processed to obtain temporally smoothed time series. Terrain information derived from DEM data and accurate coastline data were utilized to identify and mask potential aquaculture areas. An open source segmentation algorithm supported the extraction of aquaculture ponds based on backscatter intensity, size and shape features. We were able to efficiently map aquaculture ponds in coastal areas with an overall accuracy of 0.83 for the four study sites. The approach presented is easily transferable in time and space, and thus holds the potential for continental and global mapping.

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Aquaculture: Relevance, distribution, impacts and spatial assessments – A review

Cited by 347 publications

References 132 publications

Mapping Paddy Rice in China in 2002, 2005, 2010 and 2014 with MODIS Time Series

Mapping Paddy Rice in China in 2002, 2005, 2010 and 2014 with MODIS Time Series

Does Aquaculture Support the Needs of Nutritionally Vulnerable Nations?

Large-Scale Assessment of Coastal Aquaculture Ponds with Sentinel-1 Time Series Data

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