Organic matter sedimentation and resuspension in tilapia (Oreochromis niloticus) ponds during a production cycle

Jiménez‐Montealegre, Ricardo; Verdegem, Marc; Zamora, Jorge E.; Verreth, J.A.J.

doi:10.1016/s0144-8609(01)00086-3

Cited by 38 publications

(18 citation statements)

References 15 publications

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“…Avnimelech, Kochva and Hargreaves (1999) developed a dilution analysis method to differentiate the magnitude of the two particle source fluxes based on the concentration of sediment‐derived elements (Si, Al and Fe) and water‐derived elements (C, N) in material collected by sediment traps. Jimenez‐Montealegre, Verdegm, Samora and Verreth (2002) have reported that the use of Fe and Al as tracers for estimating resuspension gave similar results, and the use of one tracer is sufficient for this study.…”

Section: Introductionmentioning

confidence: 53%

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Heterogeneity of sediments and settling particles in aerated ponds

Kassila

Hussenot

2006

Aquaculture Res

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A study was conducted in seabass (Dicentrarchus labrax) and oyster (Crassostrea gigas) ponds to assess the levels of heterogeneity of sediments and settling particles. The intensity of sampling to estimate with high accuracy some characteristics will depend on the magnitude of the variation within the population under consideration. Several variables, such as total phosphate (Tot‐P), total iron (Tot‐Fe), total ammonium nitrogen (TAN), organic carbon (Org‐C), total nitrogen (Tot‐N) and P fractions were analysed during the rearing period. The box‐and‐whisker plots were used as graphical/statistical tools to visualize the descriptive statistical characteristics of the data. In the fish pond, the sediments have high concentrations of Tot‐P, Tot‐Fe and TAN in comparison with the settling particles. The high C/N ratios in the sediments indicate that the organic matter was more highly degraded in comparison with that of settling particles. The iron‐ and calcium‐bound P (CaCO3≈P) represented 23% and 47% of Tot‐P respectively in the fish‐pond sediments, whereas the Tot‐P was essentially under organic form in the settling particles. In the oyster pond, the trapping rate of solids reached 417 g m−2 day−1 under the trestles. The material consisting mostly of oyster rejection products was less degraded. The similarity in the C/N ratios indicated that the organic matter collected under the oyster trestles was not different from that collected out of trestles. We used multivariate analysis to determine the number of samples needed to be taken to represent the C, N and P average amounts. The principal component analysis (PCA) indicates that the CaCO3≈P and Tot‐Fe are the key factors to describe the spatial heterogeneity of the fish‐pond sediments. However, the analysis gives no indication of the heterogeneity of settling particles. A partition of the studied stations into different classes was performed by the hierarchical ascending classification (HAC). To assess the variability of the sediments and settling particles during the rearing period, one station could be selected from each group for the next sampling. We used a dilution analysis method to evaluate the magnitude of sedimentation and resuspension in the fish pond. The calculated proportion of resuspension relative to the total flux ranged from 71% to 80% in the fish pond. The ranges of Org‐C and Tot‐N in the resuspension rate were 19–41 and 2.6–6.7 g m−2 day−1 respectively.

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Section: Introductionmentioning

confidence: 53%

“…Aerators can also act to resuspend bottom particles and drive substances across the water–sediment interface. In Jimenez‐Montealegre et al . (2002), the trapping rate was less than 380 g m –2 day –1 in a sandy pond stocked with tilapia at 2730 kg ha −1 .…”

Section: Discussionmentioning

confidence: 99%

Heterogeneity of sediments and settling particles in aerated ponds

Kassila

Hussenot

2006

Aquaculture Res

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“…Sediment resuspension is recognised as an important physical process affecting a number of ecological aspects of shallow water bodies (Evans, 1994;Scheffer, 1998) and accounts for 40-90% of total sedimentation rates (Jimenez-Montealegre et al, 2002;Niemisto et al, 2008). If this is true also at our sampling site, net sedimentation rate at the study area can be estimated to be 4-25 g dw m -2 d -1…”

Section: Vertical Profiles In Unconsolidated Sedimentsmentioning

confidence: 87%

Benthic processes in fresh water fluffy sediments undergoing resuspension

Longhi¹,

Bartoli²,

Nizzoli³

et al. 2013

J Limnol

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“…On the pond bottom settling organic materials provide substrate for decomposing and nitrifying bacteria, which enrich the sediment providing nitrogenous nutrients to the water column (Factor1-), are a food source for zooplankton, and together with the respiration of the zooplankton increase the biological oxygen demand in the pond (Factor2). However, in quiet waters these effects are limited because the settling materials lead to anoxic conditions in the sediment, whereas nitrification and the dominant decomposition processes in the ponds require aerobic conditions (Jiménez-Montealegre et al, 2002;Avnimelech and Ritvo, 2003).…”

Section: Dynamics Of the Ponds In The Rainy And Dry Seasonsmentioning

confidence: 99%

Effects of season on ecological processes in extensive earthen tilapia ponds in Southeastern Brazil

Fávaro

Sipaúba-Tavares

Milstein³

2015

Braz. J. Biol.

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In Southeastern Brazil tilapia culture is conducted in extensive and semi-intensive flow-through earthen ponds, being water availability and flow management different in the rainy and dry seasons. In this region lettuce wastes are a potential cheap input for tilapia culture. This study examined the ecological processes developing during the rainy and dry seasons in three extensive flow-through earthen tilapia ponds fertilized with lettuce wastes. Water quality, plankton and sediment parameters were sampled monthly during a year. Factor analysis was used to identify the ecological processes occurring within the ponds and to construct a conceptual graphic model of the pond ecosystem functioning during the rainy and dry seasons. Processes related to nitrogen cycling presented differences between both seasons while processes related to phosphorus cycling did not. Ecological differences among ponds were due to effects of wind protection by surrounding vegetation, organic loading entering, tilapia density and its grazing pressure on zooplankton. Differences in tilapia growth among ponds were related to stocking density and ecological process affecting tilapia food availability and intraspecific competition. Lettuce wastes addition into the ponds did not produce negative effects, thus this practice may be considered a disposal option and a low-cost input source for tilapia, at least at the amounts applied in this study.Keywords: earthen pond ecology, flow-through, seasonal variations, tilapia extensive culture, water quality. Efeitos da época sobre os processos ecológicos em viveiros escavados para criação extensiva de tilápias no Sudeste do Brasil ResumoNo sudeste do Brasil, a criação extensiva e semi-intensiva de tilápias é realizada em viveiros escavados com fluxo contínuo, com a disponibilidade e manejo do fluxo de água diferentes nas épocas chuvosa e seca. Na região, os resíduos de alface são um recurso potencialmente de baixo custo para a tilapicultura. Este estudo examinou os processos ecológicos ocorrendo em três viveiros escavados com fluxo contínuo fertilizados com restos de alface para criação extensiva de tilápias durante as épocas chuvosa e seca. Parâmetros de qualidade de água, plâncton e sedimento foram amostrados mensalmente durante um ano. A análise de fator foi utilizada para identificar os processos ecológicos nos viveiros e elaborar um modelo gráfico do funcionamento do ecossistema dos viveiros durante as duas épocas. Os processos relacionados ao ciclo do nitrogênio mostraram diferenças entre as duas épocas, enquanto que os processos relacionados com o ciclo do fósforo não foram influenciados pela época. As diferenças ecológicas entre os viveiros foram principalmente devido aos efeitos do vento, adição de material orgânico e densidade de estocagem. Diferenças no crescimento das tilápias entre os viveiros relacionaram-se com a densidade de estocagem e os processos ecológicos afetando a disponibilidade de alimento e a competição intraespecífica. A adição dos restos de alface nos viveiros não r...

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Organic matter sedimentation and resuspension in tilapia (Oreochromis niloticus) ponds during a production cycle

Cited by 38 publications

References 15 publications

Heterogeneity of sediments and settling particles in aerated ponds

Heterogeneity of sediments and settling particles in aerated ponds

Benthic processes in fresh water fluffy sediments undergoing resuspension

Effects of season on ecological processes in extensive earthen tilapia ponds in Southeastern Brazil

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