Assessing changes in the toxicity of effluents from intensive marine fish farms over time by using a battery of bioassays

Carballeira, C.; Cebro, Alesandra; Villares, Ramón; Carballeira, A.

doi:10.1007/s11356-018-1403-x

Cited by 12 publications

(6 citation statements)

References 24 publications

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“…One of the most critical problems from marine land-based aquaculture monitoring is the absence of sensitive methods able to determine the amount and toxic effects of pollutants in highly diluted seawater discharges. This is because there are no industries with similar discharges; moreover, intensive aquaculture is relatively modern and was previously considered as a non-polluting activity (Carballeira et al, 2018). This is not the case with net cages and soft bottom samples, because there is usually sediment underneath and its integrative capacity concentrates contaminants from the water column and allows its determination (Caeiro et al, 2012).…”

Section: Open Land-based Farmingmentioning

confidence: 99%

Towards Environmental Sustainability in Marine Finfish Aquaculture

et al. 2021

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Aquaculture is one of the fastest growing food production sectors and has great potential for food security and livelihoods. However, it generates concerning consequences for the environment, including chemical and biological pollution, disease outbreaks, unsustainable feeds and competition for coastal space. Recent investigations are focusing on sustainable techniques (e.g., polyculture, offshore facilities) to improve the relationship between the industry, environment and society. This review provides an overview of the main factors of ecological concern within marine finfish aquaculture, their interactions with the environment, and highlights sustainable alternatives that are currently in use or development. Adequate environmental monitoring and location of farms, the reduction and exploitation of wastes and chemicals being used is crucial to ensure the growth and continuity of aquaculture production.

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Section: Open Land-based Farmingmentioning

confidence: 99%

Towards Environmental Sustainability in Marine Finfish Aquaculture

et al. 2021

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“…Compared with other countries in the world, China's mariculture had the characteristics of high production, large scale, rich diversity, low nutritional level, and high ecological efficiency (Tang et al, 2016). Fed culture types (e.g., cages and pond) brings bigger nutrient loads than the extractive culture types comparatively (Wang, et al, 2012;Bannister et al, 2016;Carballeira et al, 2018). Ours results showed N and P loads from mariculture of 2019 were 5.08×10 4 t and 2.9×10 3 t respectively, which were remarkably lower compared with the 0.4×10 6 t/a (according to N) and 0.06×10 6 t /a (according to P) in 2017 and the 0.184×10 6 t/a (according to N) (Wang et al, 2020) and 0.022×10 6 t/a (according to P) in 2010 (Zhang et al, 2015), probably due to differences in the approaches used.…”

Section: Discussionmentioning

confidence: 99%

“…Mariculture is one of the fastest-growing food-producing industries in the world with an annual production of over 63×10 6 t in 2018 (FAO, 2020). The potential effects of the mariculture industry on its surrounding environment have attracted a large interest from both marine scientists and policymakers (e.g., Bambaranda et al, 2019;Joesting et al, 2016;Bannister et al, 2016;Carballeira et al, 2018). Mariculture is dominated by extractive culture of aquatic plants, filter-feeding bivalves, and fed culture of marine finfish and crustacean.…”

Section: Introductionmentioning

confidence: 99%

“…Most studies have illustrated that mariculture has remarkable effects on the environment (Holmer, 2010) mainly due to waste load, which promotes eutrophication of coastal waters (Boyd, 2003;Farmaki et al, 2014;Filgueira et al, 2017). Two generally accepted views are that fed culture (cages and pond) is the source of nitrogen (N) and phosphorus (P) (Wang et al, 2012;Bannister et al, 2016;Carballeira et al, 2018), and photosynthetic seaweed is the sink of nutrient (Xiao et al, 2017). Due to different estimation methods, the calculations of source-sink effect of bivalve are different.…”

Section: Introductionmentioning

confidence: 99%

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Environmental effects of mariculture in China: An overall study of nitrogen and phosphorus loads

Zhang

et al. 2022

Acta Oceanol. Sin.

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Eutrophication in coastal area has become more and more serious and mariculture potential is a main cause. Although there are some quantitative research on nutrient loads in national and global perspective, the calculation method problems make the results controversial. In this paper, the farming activities are divided into fed culture types (include cage culture and pond culture) and extractive culture types (e.g. seaweed, filter-feeding shellfish culture). Based on the annual yield of China in 2019 and feed coefficient of fed culture types and carbon (C), nitrogen (N), and phosphorus (P) content of extractive culture types, the annual nutrient loads was estimated. The results showed that to coastal region of China (1) annual nutrient released by fed culture types were about 58 451 t of N, 9 081 t of P, and annual nutrient removed by harvest of extractive culture types were 109 245 t of N, 11 980 t of P and 1.86×10 6 t of C. Overall, the net amount of nutrient removed annually by mariculture industry were 50 794 t of N and 2 901 t of P. (2) The nutrient released from mariculture industry influenced nutrient stoichiometry. Pond farming and seaweed farming had the potential of increasing the molar concentration ratio of N and P (N:P), while cage farming and bivalve farming decreased the N:P. (3) Due to different mariculture types and layouts in the coastal regions in China, N and P loading were regional different. Among the coastal regions in China, net release of nutrient from mariculture occurred only in Hainan and Guangxi regions, while in the other regions, N and P were completely removed by harvest. We suggest decrease the amount of fed culture types and increase the amount of integrated culture with extractive culture types. This study will help to adjust mariculture structure and layout at the national level to reduce the environmental impact.

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“…Abundant loads of organic wastes, nutrients, and chemicals in the effluent are discharged into the receiving waters, and are subsequently transported in the water column and settle on the seabed, impacting the adjacent area (near-field) and beyond (far-field) [7,8]. These can cause significant environmental and ecological issues such as low levels of dissolved oxygen (i.e., hypoxia), eutrophication, heavy metal pollution, and habitat destruction [9]. Appropriate stringent regulatory measures are therefore required to manage the discharge of mariculture effluents and their impacts [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Review on Mariculture Effluent: Characterization and Management Tools

Wang

Cuthbertson

Gualtieri

et al. 2020

Water

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While marine aquaculture, or mariculture, has been growing rapidly and globally in recent decades, many environmental concerns remain to be fully addressed to achieve its long-term goal of sustainable development. This paper aims to provide a synthesized perspective on these issues by reviewing and discussing the characterization, transport, and current modelling and management tools associated with effluents released from mariculture sites. Specifically, we examined the effluent characteristics and behavior from source-to-sink, including the composition and load of effluent discharge, its transport and transformation processes in the water column and at the seabed, and its impacts on the pelagic and benthic environments. We then focused on management-related issues, including the setting of the regulatory mixing zone, the establishment of environmental standards, monitoring measures, and modelling techniques to depict the current state-of-the-art modes in a global context. Our study shows that while substantial progress has been made in understanding the nature of the mariculture effluent, as well as in monitoring and modelling its transport and fate, the regulatory framework still lags behind in many countries where the mariculture industry is relevant. This is particularly evident in the lack of consistent criteria for the definition of regulatory mixing zones and the associated environmental standards for water quality and benthic impacts. Besides, as new predictive models are emerging quickly, their proper evaluation and validation are imperative in view of their increasing application in regulatory practices. This review is intended to provide references for advancing regulatory management of mariculture effluents, as well as for promoting sustainable mariculture development.

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Assessing changes in the toxicity of effluents from intensive marine fish farms over time by using a battery of bioassays

Cited by 12 publications

References 24 publications

Towards Environmental Sustainability in Marine Finfish Aquaculture

Towards Environmental Sustainability in Marine Finfish Aquaculture

Environmental effects of mariculture in China: An overall study of nitrogen and phosphorus loads

A Review on Mariculture Effluent: Characterization and Management Tools

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