Assessing trout farm pollution by biological metrics and indices based on aquatic macrophytes and benthic macroinvertebrates: A case study

Camargo, Julio A.; Gonzalo, Cristina; Alonso, Álvaro

doi:10.1016/j.ecolind.2010.10.001

Cited by 36 publications

(29 citation statements)

References 29 publications

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“…Except for diatoms, these metrics clearly decreased for all the biological compartments studied, at station Down 1, which is in accordance with the literature [16], [48]–[49]. They recovered to variable extents at Down 2, indicating weaker biological impact likely due to lower toxicant availability (by dilution and/or toxicant degradation).…”

Section: Discussionsupporting

confidence: 90%

A Multicompartment Approach - Diatoms, Macrophytes, Benthic Macroinvertebrates and Fish - To Assess the Impact of Toxic Industrial Releases on a Small French River

2014

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The River Luzou flows through a sandy substrate in the South West of France. According to the results of two assessment surveys, the Water Agency appraised that this river may not achieve the good ecological status by 2015 as required by the Water Framework Directive (2000/60/EC). This ecosystem is impacted by industrial effluents (organic matter, metals and aromatic compounds). In order to assess and characterize the impact, this study aimed to combine a set of taxonomic and non-taxonomic metrics for diatoms, macrophytes, macroinvertebrates and fish along the up- to downstream gradient of the river. Diversity metrics, biological indices, biological and ecological traits were determined for the four biological quality elements (BQE). Various quantitative metrics (biomass estimates) were also calculated for diatom communities. The results were compared to physicochemical analysis. Biological measurements were more informative than physicochemical analysis, in the context of the study. Biological responses indicated both the contamination of water and its intensity. Diversity metrics and biological indices strongly decreased with pollution for all BQE but diatoms. Convergent trait selection with pollution was observed among BQE: reproduction, colonization strategies, or trophic regime were clearly modified at impaired sites. Taxon size and relation to the substrate diverged among biological compartments. Multiple anthropogenic pollution calls for alternate assessment methods of rivers' health. Our study exemplifies the fact that, in the case of complex contaminations, biological indicators can be more informative for environmental risk, than a wide screening of contaminants by chemical analysis alone. The combination of diverse biological compartments provided a refined diagnostic about the nature (general mode of action) and intensity of the contamination.

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Section: Discussionsupporting

confidence: 90%

A Multicompartment Approach - Diatoms, Macrophytes, Benthic Macroinvertebrates and Fish - To Assess the Impact of Toxic Industrial Releases on a Small French River

2014

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“…Camargo et al (2011) evaluated water quality before and after the installation of a trout farm in a river in the Spanish peninsula. Results indicated an increase in the percentage of Oligochaeta and Chironomidae, and a decrease in the numbers of EPT (Ephemeroptera, Plecoptera, and Trichoptera) due to the increase in the concentration of nutrients (N and P) from the effluents of fish farming.…”

Section: Discussionmentioning

confidence: 99%

Assessment of benthic macroinvertebrates at Nile tilapia production using artificial substrate samplers

et al. 2016

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Biomonitoring is a cheap and effective tool for evaluation of water quality, and infer on the balance of aquatic ecosystems. The benthic macroinvertebrates are bioindicators sensitive to environmental changes, and can assist in detecting and preventing impacts such as organic enrichment and imbalance in the food chain. We compared the structure of benthic communities on artificial substrate samplers located in places near and far from net cages for production of Nile tilapia (Oreochromis niloticus). Samplers were manufactured with nylon net, using substrates such as crushed stone, gravel, loofah and cattail leaves. Samples were collected after 30 days of colonization, rinsed and then the specimens were identified and quantified. The following metrics were calculated: richness of Operational Taxonomic Units, Margalef richness, abundance of individuals, Shannon index and evenness index. The macrobenthic community structure was strongly modified according to the proximity of the net cages. Metrics showed significant differences (p < 0.05) between near and distant sites, for both periods (dry and rainy seasons). The position of the samplers significantly affected the structure of macroinvertebrate community, as near sites showed higher values for the community metrics, such as richness and diversity. Near sites presented a larger number of individuals, observed both in the dry and rainy seasons, with a predominance of Chironomidae (Diptera) in the dry season and Tubificidae (Oligochaeta) in the rainy season.Keywords: biomonitoring, aquaculture, Oreochromis niloticus, Brazil, artificial substrate sampler. Avaliação da comunidade de macroinvertebrados bentônicos em produção detilápia-do-Nilo com uso de coletores com substrato artificial ResumoO biomonitoramento é uma ferramenta com custo relativamente baixo e eficaz para avaliação da qualidade da água, além de inferir sobre o equilíbrio dos ecossistemas aquáticos. Os macroinvertebrados bentônicos são bioindicadores sensíveis às mudanças ambientais, e podem auxiliar na detecção e prevenção de impactos como o enriquecimento orgânico e o desequilíbrio da cadeia alimentar. Como objetivo, foi comparada a estrutura das comunidades bentônicas em coletores com substrato artificial situados em locais próximos e distantes de tanques rede para produção de tilápia do Nilo (Oreochromis niloticus). Os coletores foram fabricados com rede de náilon, utilizando os substratos brita, cascalho, bucha vegetal e folhas de taboa. Foram realizadas coletas após 30 dias de colonização. As amostras foram lavadas e os espécimes identificados e quantificados. As métricas calculadas foram: riqueza de Unidades Taxonômicas Operacionais, riqueza de Margalef, abundância de indivíduos, índice de Shannon e índice de Pielou. A estrutura da comunidade macrobentônica foi fortemente modificada de acordo com a proximidade dos tanques-rede. As métricas apresentaram diferenças significativas (p < 0,05) entre os locais próximos e distantes, em ambos os períodos (estações seca e chuvosa). A posição dos a...

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“…An effective RAS for large scale trout culture was developed in Denmark, a country in maritime climate with strict criteria for wastewater (Jokumsen & Svendsen ). As traditional trout farms have significant effects on the downstream environment (Amirkolaie ; Camargo, Gonzalo & Alonso ; Webb ), aquaculture was limited to the maximum annual amount of feed to restrict nutrients concentration in effluents. Hence, RAS for trout culture rapidly came into use to maximize aquaculture productivity while maintaining environmental standards (Jokumsen & Svendsen ).…”

Section: Introductionmentioning

confidence: 99%

Feasibility of open recirculating system in temperate climate – a case study

Buřič

Bláhovec²,

Kouřil

2014

Aquac Res

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The increasing number of depleted, overexploited and recovering world marine stocks, together with increasing demand for fish and need for sustainable management of aquatic resources has led to a gradual shift to inland intensive aquaculture with water reuse. Intensive recirculating systems are becoming a rapidly developing sector of aquaculture, with the objectives to increase production and minimize environmental impact. However, transfer of technologies from original sites to locations of different climate is not always successful. The present study evaluates the use of an open recirculating system in a temperate climate. The 3-year study showed successful production with better fish growth and feed utilization than in a flow-through facility at the same site, but presented significant issues necessitating changes in technology as well as physical adaptations. A positive effect of the technology with respect to the environment is possible, but systems must be adapted to temperate climatic conditions.

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Assessing trout farm pollution by biological metrics and indices based on aquatic macrophytes and benthic macroinvertebrates: A case study

Cited by 36 publications

References 29 publications

A Multicompartment Approach - Diatoms, Macrophytes, Benthic Macroinvertebrates and Fish - To Assess the Impact of Toxic Industrial Releases on a Small French River

A Multicompartment Approach - Diatoms, Macrophytes, Benthic Macroinvertebrates and Fish - To Assess the Impact of Toxic Industrial Releases on a Small French River

Assessment of benthic macroinvertebrates at Nile tilapia production using artificial substrate samplers

Feasibility of open recirculating system in temperate climate – a case study

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