&lt;b&gt;Imbalances in the hardness/alkalinity ratio of water and Nile tilapia’s growth performance&lt;/b&gt; - doi: 10.4025/actascitechnol.v36i1.18995

Cavalcante, Davi de Holanda; Caldini, Nayara Nunes; Silva, Jéssica Lucinda Saldanha da; Lima, Francisco Roberto dos Santos; Sá, Marcelo Vinı́cius do Carmo e

doi:10.4025/18995

Cited by 17 publications

(5 citation statements)

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“…Finally, the fish from Valle del Mezquital are farmed in so-called hard waters. The hardness values were like those reported by Cavalcante in 2014 (values of 58 to 529 mg L −1 ) [ 35 ], while the alkalinity was higher compared to the same study (53–104 mg L −1 ). However, the water from the farms of Valle del Mezquital maintained a ratio close to 1/1 between these parameters, an aspect that favors the growth and cultivation of these organisms [ 35 ].…”

Section: Discussionsupporting

confidence: 86%

Physicochemical Water Quality Influence on the Parasite Biodiversity in Juvenile Tilapia (Oreochromis spp.) Farmed at Valle Del Mezquital in the Central-Eastern Socioeconomic Region of Mexico

Acosta-Pérez¹,

Vega-Sánchez²,

Fernández-Martínez³

et al. 2022

Pathogens

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Aquaculture parasite biodiversity dependents on multiple environmental characteristics, including water quality. The analysis of this relationship aims to support improvements in the production management of tilapia. For this purpose, a total of 100 juvenile fishes (Oreochromis spp.) and 30 water samples were collected at Valle del Mezquital in the Central-Eastern socioeconomical region of Mexico. A study of parasite biodiversity was carried out and water quality parameters were determined. Biodiversity in the habitat was measured using the Simpson diversity index, which considers the number of species present and the abundance of each one; we also calculate the Berger-Parker index to estimate the proportional importance of the most abundant species. In general, it was found that 86% of the examined specimens were parasitized. Parasite biodiversity was 11 genera (Simpson index = 0.55). Trichodina spp. (Ciliophora) was the dominant genus (Berger-Parker index = 0.51). The protozoa Apiosoma spp. was associated with the water hardness (Berger-Parker index = 0.57). Furthermore, the presence of monogeneans showed a positive correlation with the levels of nitrites and ammonium in the water (Berger-Parker index = 0.06–0.55). This characterization may represent a useful tool in the comprehensive management of parasites that affect the farmed tilapia. However, new data is necessary to expand the knowledge about the environment-host-parasite relationship.

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Section: Discussionsupporting

confidence: 86%

Physicochemical Water Quality Influence on the Parasite Biodiversity in Juvenile Tilapia (Oreochromis spp.) Farmed at Valle Del Mezquital in the Central-Eastern Socioeconomic Region of Mexico

Acosta-Pérez¹,

Vega-Sánchez²,

Fernández-Martínez³

et al. 2022

Pathogens

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“…Decrease in fish biomass yield per tank from control to T-2 corresponds to their decrease in survival and growth in each treatment (Jena et al, 2007;Pawar et al, 2009). Therefore, catla seems to be sensitive to higher water alkalinity during larval phase as reported by many authors in other fish species (Rojas et al, 2001;Rojas and Rocha, 2004;Andrade et al, 2007;Cavalcante et al, 2014).Thus, increasing of water alkalinity could be used as a tool for seed stunting in catla.…”

Section: Resultsmentioning

confidence: 89%

Influence of Water Alkalinity in Production of Stunted Fingerlings of Catla catla (Hamilton)

Sahoo¹,

Das²,

Nanda³

et al. 2020

Int.J.Curr.Microbiol.App.Sci

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Journal homepage: http://www.ijcmas.com Study was conducted for 90 days to know the effect of varying water alkalinity in production of stunted fingerlings of Catla catla in outdoor FRP tanks (1000 litre). Tanks filled up to 800 litre marks were grouped into three triplicated treatments and were stocked with catla seed (3.9g, 67±0.27mm) at 16nos per tank (20m -3 ). Three alkalinity levels, i.e. 80, 150 and 200 mg CaCO 3 L -1 were used and designated as Control, T-1 and T-2, respectively. Pond water (80 mgL -1 ) and bore well water (360 mgL -1 ) were used as the two sources to get the desired alkalinity level. Fishes were fed with powdered feed @ 8% of their respective biomass in all the treatments. The survival of catla decreased significantly (p<0.05) with the increase in alkalinity from control (97.92±3.61%) to T2 (89.58±3.61%). The average harvested body weight and length in T-1 (8.83±0.40g, 8.73±0.17cm) and T-2(8.28±0.19g, 8.65±0.10cm) were similar (p>0.05), but both were significantly lower than the control (9.64±0.12g, 9.02±0.02cm). Similarly, specific growth rate of T1 (0.91±0.05) and T2 (0.84±0.03) were similar and significantly lower than control (1.01±0.01). The biomass yield also reduced significantly with increase in alkalinity from control (151.00±4.63g) followed by T1 (132.43±6.06g) and T2 (118.77±7.56g). Such results indicated pronounced effect of increased alkalinity on suppressing fish growth and suggested possibility of manipulating this parameter as a tool for stunting of catla seed.

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“…The increase in hardness in the highest stocking density tanks could be explained by the greater input of calcium by the artificial feeding carried out in those tanks (Cavalcante, Caldini, Silva, Lima, & Sá, 2014).…”

Section: Resultsmentioning

confidence: 99%

<b>Interaction between afternoon aeration and tilapia stocking density

Lima

Cavalcante

Rebouças

et al. 2016

Acta Sci. Anim. Sci.

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ABSTRACT. The present study aimed at determining the effects of the interaction between afternoon aeration and stocking density of Nile tilapia on variables of water and soil quality, growth performance and effluent quality. The experiment was a 3 x 2 factorial randomized block design, with three stocking densities (8, 12 and 16 fish per tank or 43.5, 65.3, and 87.0 g m -3 ) under two mechanical aeration regimes, absence (control; three replicates) and afternoon aeration (four replicates). The afternoon aeration was carried out from 12.00 a.m. up to 18.00 p.m. from the 3 rd week until the end of the experiment. Except for the 16-fish tanks, the lowest concentrations of total ammonia nitrogen were found in the tanks with higher density of fish provided with afternoon aeration. Nitrite concentrations were lower in the 8-fish aerated tanks. In intensive system, the afternoon aeration of the fish culture water is an efficient management of water quality to remove gaseous ammonia and nitrite from water, but it is not appropriate to remove hydrogen sulfide from water.Keywords: fish farming, total ammonia nitrogen, unionized ammonia, nitrite.Interação entre aeração vespertina e densidade de estocagem na criação de juvenis de tilápia RESUMO. O presente trabalho teve por objetivo determinar os efeitos da interação entre a aeração vespertina da água e a densidade de estocagem de juvenis de tilápia do Nilo sobre variáveis de qualidade de água, solo, desempenho zootécnico e qualidade de efluentes. O delineamento experimental adotado foi em blocos ao acaso, em arranjo fatorial 3 x 2. Havia três densidades de estocagem (8, 12 e 16 peixes por tanque ou 43,5; 65,3 e 87,0 g m -3, respectivamente), em dois regimes de aeração mecânica da água, ausência (controle; três repetições) e aeração vespertina (quatro repetições). A aeração vespertina da água ocorreu das 12 às 18 h, da terceira até a última semana de criação. Exceto pelos tanques com 16 peixes, menores concentrações de nitrogênio amoniacal total foram observadas nos tanques de maior densidade de estocagem providos de aeração vespertina. As concentrações de nitrito da água foram menores nos tanques com 8 peixes e aeração vespertina. A aeração vespertina da água de cultivo de peixes é um eficiente manejo de qualidade de água para remoção de amônia gasosa e nitrito da água em sistemas intensivos, não sendo indicado, entretanto, para remoção de gás sulfídrico da água.Palavras-chave: piscicultura, nitrogênio amoniacal total, amônia não-ionizada, nitrito.

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<b>Imbalances in the hardness/alkalinity ratio of water and Nile tilapia’s growth performance</b> - doi: 10.4025/actascitechnol.v36i1.18995

Cited by 17 publications

References 1 publication

Physicochemical Water Quality Influence on the Parasite Biodiversity in Juvenile Tilapia (Oreochromis spp.) Farmed at Valle Del Mezquital in the Central-Eastern Socioeconomic Region of Mexico

Physicochemical Water Quality Influence on the Parasite Biodiversity in Juvenile Tilapia (Oreochromis spp.) Farmed at Valle Del Mezquital in the Central-Eastern Socioeconomic Region of Mexico

Influence of Water Alkalinity in Production of Stunted Fingerlings of Catla catla (Hamilton)

<b>Interaction between afternoon aeration and tilapia stocking density

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