Macrobenthos as Biological Indicators to Assess the Influence of Aquaculture on Japanese Coastal Environments

Yokoyama, Hisashi; Nishimura, A; Inoue, Misa

doi:10.1007/978-1-4020-6148-6_22

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…ignition loss, pH, redox potential and AVS content) between fish farming and non‐farming areas in Hiroshima Prefecture; (ii) the enrichment extended to an area with a 165 m radius from the centre of the farm; (iii) the redox potential and AVS content in the fish farm area varied seasonally; and (iv) there was a significant correlation between the seasonal and annual organic carbon load from the fish cages and AVS content in the sediment, suggesting that AVS is a useful indicator for monitoring the fish farm environment. Recent studies (Yokoyama et al. 2002a,b, 2004, 2007; Koizumi 2008; Uede 2008a) also showed the validity of the AVS content as an indicator to evaluate fish farm environments as healthy, cautionary and critical conditions, although the standard values to identify these categories were different between the localities.…”

Section: Environmental Impacts Of Fish Farmingmentioning

confidence: 99%

“…Assimilative capacity of a fish farm depends on the waste dispersal and the oxygen supply. Based on this concept, Yokoyama and colleagues (Yokoyama et al. 2002a,b, 2004, 2006b, 2007) have developed guidelines for the suitable siting of fish farms by using two indices, ED (embayment degree) and ISL (index of suitable location).…”

Section: Attempts To Determine the Upper Limit Of Productionmentioning

confidence: 99%

“…2002a,b, 2004, 2006b, 2007) have developed guidelines for the suitable siting of fish farms by using two indices, ED (embayment degree) and ISL (index of suitable location). The ED index is principally expressed as ED = ( L / W )( a / Ds )( b / Dm ), where L is the distance from the bay mouth to a fish farm, W is the width of the bay mouth, Ds is the water depth at the fish farm, Dm is the depth at the mouth of the bay, a is the mean depth of all the sampling sites, and b is the mean depth of the mouth of the bay in the research area (Yokoyama et al. 2002a, 2007).…”

Section: Attempts To Determine the Upper Limit Of Productionmentioning

confidence: 99%

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Monitoring, assessment and management of fish farm environments in Japan

Yokoyama

2010

Reviews in Aquaculture

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In Japan, coastal fish farming has become a well‐established industry. Intensive cultivation of finfish, however, generates large amounts of organic waste and nutrients, resulting in environmental deterioration in and around aquaculture facilities. Such negative effects have become increasingly conspicuous since the commencement of fish farming in the mid 1960s and its subsequent rapid development during the 1970s and 1980s. Various studies have attempted to measure the material fluxes in fish farms, to assess the potential environmental impacts, to determine criteria for the optimization of the location of farms and production levels, and to establish methods for improvement of aquaculture environments. In this review, research conducted during the last five decades in Japan concerning the flux of feed, environmental impacts of fish farming, factors controlling the degree of impacts, the upper limit of production and methods for improvement of environments is reviewed and current concerns for aquaculture environments discussed.

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Section: Environmental Impacts Of Fish Farmingmentioning

confidence: 99%

Section: Attempts To Determine the Upper Limit Of Productionmentioning

confidence: 99%

Section: Attempts To Determine the Upper Limit Of Productionmentioning

confidence: 99%

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Monitoring, assessment and management of fish farm environments in Japan

Yokoyama

2010

Reviews in Aquaculture

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“…Trout fish farm residues were reported as responsible of diversity reduction and tolerant species increase in downstream stations (Johnson et al 1993;Loch et al 1996;Yokoyama 2007).…”

Section: Introductionmentioning

confidence: 99%

Response of macroinvertebrate communities to anthropogenic pressures in Tajan River (Iran)

2014

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The Tajan River was investigated for one year in seven stations, analyzing the relationships between physical properties, water chemistry and aquatic macroinvertebrates. Biotic and diversity indices were compared with canonical unconstrained (CA) and constrained (CCA) ordination to test different methods able to estimate river ecology status. An upstream-downstream gradient was emphasized, in presence of anthropogenic stressors, coming from trout farms, paper factory, agriculture, urbanization, river regulation; the first CCA axis emphasized a natural gradient, bound to altitude, source distance, water temperature, the second CCA axis a pollution gradient. Biotic and diversity indices detected three polluted stations: S3, downstream the Korcha tributary, S6 downstream a paper factory and S7 situated after the Sari town. S4 showed high macroinvertebrates densities, which were attributed to the presence of a dam. Both multimetric and multivariate methods emphasized the need to separate the influence of natural variables from anthropogenic stressors in the Tajan River. To separate the influence of longitudinal gradient from the influence of pollution, it was suggested to evaluate the anthropogenic impact as deviation from a regression line, considering a multimetric index as dependent variable and source distance as predictor variable. The definition of reference sites was problematic in this poorly investigated area and a progress in taxonomic resolution is in any case recommended to better define the ecological status of these waters.

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Impacts of sea cucumber farming on biogeochemical characteristics in the Yellow River estuary, Northern China

Yokoyama

Cui

et al. 2017

Physics and Chemistry of the Earth, Parts A/B/C

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Macrobenthos as Biological Indicators to Assess the Influence of Aquaculture on Japanese Coastal Environments

Cited by 4 publications

References 14 publications

Monitoring, assessment and management of fish farm environments in Japan

Monitoring, assessment and management of fish farm environments in Japan

Response of macroinvertebrate communities to anthropogenic pressures in Tajan River (Iran)

Impacts of sea cucumber farming on biogeochemical characteristics in the Yellow River estuary, Northern China

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