Plankton and water quality variability in an estuary before and after the shrimp farming effluents: possible impacts and regeneration

Bauer, William R.; Abreu, Paulo César; Poersch, Luís

doi:10.1590/s1679-87592017143406503

Cited by 9 publications

(9 citation statements)

References 38 publications

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“…Although the Cyanophyta were also dominant in the Passos River estuary, the densities found there were considered low, since the maximum cellular density was less than 40,000 cells ml −1 , which was lower than found in the ponds. Similar conditions were found by Bauer et al (2017) who reported several Cyanophyta densities in the order of 10 4 cells ml −1 in the Patos Lagoon estuary adjacent to a commercial shrimp farm.…”

Section: Phytoplankton Communitysupporting

confidence: 87%

“…Thus, there is a need to gain a better understanding of the effect of aquaculture activity on phytoplankton in both nursery and estuary environments. Previous studies have reported on the influence of aquaculture activity on zooplankton (Dong et al, 2006;Bauer et al, 2017;Herbeck et al, 2013), molluscs (Hong et al, 2020;Liu et al, 2017) and ichthyofauna (Herbeck et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…While phytoplankton can be used to make direct inferences about the ecological status of aquatic environments, few studies report the influence of aquaculture activity, especially shrimp production, on phytoplankton communities in estuaries adjacent to farms and within the nurseries themselves (Cardozo & Odebrecht, 2014;Bauer et al, 2017;Herbeck et al, 2013). Thus, the common practice of studying these environments unilaterally (either nursery or estuary) leads to a limited understanding of the conformation and dynamics of the phytoplankton communities due to the lack of integrated information from both areas.…”

Section: Introductionmentioning

confidence: 99%

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Influence of shrimp farming activities on the phytoplankton community of a nearby estuary in Northeastern Brazil

et al. 2021

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The aim of this study was to evaluate the influence of shrimp farming on the phytoplankton community of a nearby shrimp estuary in Northeastern Brazil during a single cultivation cycle. Samples were collected from shrimp ponds and the estuary to analyse water quality variables, ecological indices and phytoplankton assemblages in both areas. Significant differences between sampling sites and over time were found for all variables. Phytoplankton density, orthophosphate and chlorophyll a content were lower in the estuary than in the ponds and were in accordance with Brazilian environmental law. Cyanophyta was abundant in the estuary and dominant in the shrimp ponds. Moreover, a significant positive correlation was found between Cyanophyta and orthophosphate. Thus, the influence of shrimp farming on the phytoplankton community was minimal or nil in the nearby estuary, as lower cell densities, a lower quantity of nutrients (especially orthophosphate) and better ecological health were found in the estuary than in the shrimp farm ponds. These findings contribute to a better understanding of the ecological balance in water bodies adjacent to aquaculture areas. Further studies should address the influence of wastewater from other aquaculture activities on the equilibrium of aquatic ecosystems.

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Section: Phytoplankton Communitysupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of shrimp farming activities on the phytoplankton community of a nearby estuary in Northeastern Brazil

et al. 2021

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“…However, high chlorophyll values were not observed at this point, despite the large amount of nutrients. Bauer et al (2017) conclude that the environment quickly assimilated the effluents discharge, after few days of harvesting marine shrimp. Instead, in the shrimp pond, high values of nutrients were registered at the end of the two cultivation cycles, a large increase in the values of chlorophyll a, as observed in Figure 6.…”

Section: Discussionmentioning

confidence: 81%

Effects of Environmental Factors on Succession of Micro-Phytoplankton Community in a Marine Shrimp Pond and Adjacent Amazon Estuary

et al. 2019

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This study aims to evaluate the effects of the environmental factors and Litopenaeus vannamei farm effluents on succession and structure of the micro-phytoplankton community and water quality in the shrimp pond and adjacent estuarine waters along the two intensive shrimp production cycles. The surface water samples for quali-quantitative analyses were monthly collected in five points, in the shrimp pond (3) and the adjacent estuary (2), using a plankton net (64 μm) and polyethylene containers, during in the rainy season, and in the dry period. The micro-phytoplankton community was composed by 205 taxa. The environments were different in relation to the total abundance, richness and species indicators with the estuary presented the highest values in relation to the shrimp pond. The diatoms were predominant mainly in the estuary, with the higher abundances and the great majority of indicator species, while in the shrimp pond, the number of indicator diatoms was much lower allowing the establishment euglenophytes and cyanophytes as also indicator species. In the shrimp pond the main drivers of micro-phytoplankton community structure were the higher concentrations of ammoniacal nitrogen, nitrite, nitrate and phosphate, mainly in relation to the feed accumulation, while in the estuary, the main driver factor was the seasonality.

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“…Water quality is the key factor for fish health, growth and high production as well (Ramanathan and Amsath, 2018;Kumar et al, 2017;Kiran, 2010;Sikoki and Veen, 2004). It is reported that pond water quality can be worsened by providing extreme feed and fertilizers, which is liable for low DO concentrations, as well as high NH 3 , NO 2 and phosphorus concentration (Bauer et al, 2017;Tamizhazhagan and Pugazhendy, 2016;Herbeck et al, 2013;Naylor et al, 1998). Whereas, too much nutrients are gathered and responsible to cause polluted and anoxic condition by phytoplankton blooms in aquaculture ponds (Boyd, 2015;Wu et al, 2014;Munni et al, 2013;Jackson et al, 2004;Alonsorodrígues and Osuna, 2003;Burford and Williams, 2001;Desai, 1995).…”

mentioning

confidence: 99%

The Status of Water Quality in Various Fish and Shrimp Farms of Sindh Province, Pakistan: Abundance of Planktonic Biomass in Relation to Physicochemical Properties of Pond Water

Rukhsana¹,

Rashid²,

Fatima³

et al. 2021

SJA

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W ater quality assessment in aquaculture ponds is crucial to identify the variation and optimal range of limnological parameters like pH, temperature, alkalinity, total hardness, potassium, nitrate, phosphate, sulphate, and dissolved oxygen (DO) of water which is necessary for the enhancement Abstract | This research aims to study the water quality of 10 fish farms located in different regions of Sindh and to suggest a guideline for favorable physicochemical parameters for fish and shrimp farming. Water samples (n = 3 each) were collected from these farms and analyzed for contents of ammonia, alkalinity, temperature, nitrate, salinity, nitrite, pH, total hardness, dissolved oxygen (DO), chlorophyll-a and phytoplankton-density during the period from March, 2015 to June, 2016. The chlorophyll-a concentration was determined by using the acetone extraction technique. Ponds water sample (50 liters) was filtered through plankton net of 20 µm pore size and preserved in 4% formaldehyde for the analysis of phytoplankton. Subsequently, the phytoplankton were counted under microscope. Result showed that water quality parameters of all fish farms were suitable for farming purpose excluding Shamimul Hassan Farm, Fish Farm Green Co. and Ghulam Ali Nizamani Farm, where high level of total hardness was recorded as 1000±2.65 mg l -1 , 700±4.80 mg l -1 , and 975±4.73 mg l -1 , respectively. The minimum chlorophyll-a (1.4-2.1 mg l -1 ) was found in the ponds water of Shamimul Hassan Farm, Fish Farm Green Co., and Ghulam Ali Nizamani Fish Farm, although the remaining farms showed maximum values 5.8-7.5 mg l -1 . Similar trend for the minimum (2.3 ×10 5 cells 1 -1 ) and maximum (13.2 ×10 5 cells 1 -1 ) concentration of phytoplankton cell density was also found in all the ponds, representing a strong correlation (P>0.05) between chlorophyll-a and phytoplankton cell density. Significant correlation (P>0.05) was also found among temperature, pH, salinity, nitrite, nitrate, ammonia, alkalinity, total hardness, chlorophyll-a and phytoplankton-density. Eigenvalues of the first two principal components represented 99.97 % of the total variability in water quality of fish and shrimp ponds at different farms. Positive loadings indicated high contribution of water quality variables throughout the study period.

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Plankton and water quality variability in an estuary before and after the shrimp farming effluents: possible impacts and regeneration

Cited by 9 publications

References 38 publications

Influence of shrimp farming activities on the phytoplankton community of a nearby estuary in Northeastern Brazil

Influence of shrimp farming activities on the phytoplankton community of a nearby estuary in Northeastern Brazil

Effects of Environmental Factors on Succession of Micro-Phytoplankton Community in a Marine Shrimp Pond and Adjacent Amazon Estuary

The Status of Water Quality in Various Fish and Shrimp Farms of Sindh Province, Pakistan: Abundance of Planktonic Biomass in Relation to Physicochemical Properties of Pond Water

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