A laboratory scale recycling water unit for tilapia breeding

M. Koiller; R. R. Avtalion

doi:10.1016/0144-8609(85)90016-0

A laboratory scale recycling water unit for tilapia breeding

M. Koiller, R. R. Avtalion

The Mina and Everard Goodman Faculty of Life Sciences

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The technical features of a laboratory scale water recycling unit for experimental small scale tilapia breeding are described. Two units (1 and 2) were operated during a 6 month period, carrying a similar fish load (7·5 kg) and feeding rate (2% fish body weight/day). Unit 1 received natural illumination, while unit 2 was artificially illuminated (14/10 - light/dark cycle). Both units were equipped with a biological filter bed (substrate surface area, 3500 cm²). In unit 1, total ammonium and nitrite concentrations ranged from 0·05 to 0·5 mg liter^-1, while nitrate varied between 10-40 mg liter^-1. In unit 2 corresponding values were 0·15-3 mg liter^-1, 0·05-0·8 mg liter^-1 and 10-40 mg liter^-1. Temperatures ranged between 20-29°C and pH values between 7·5-6·9 in both units. Dissolved oxygen concentrations decreased gradually from 5·6 to 3·4 mg liter^-1 in unit 1 and from 5·6 to 2·6 mg liter^-1 in unit 2. Twenty-six spawnings occurred in unit 1 in March and April, while only eight spawnings occurred in unit 2, possibly because of the absence of sunlight. The significance of these results are discussed.

Original language	English
Pages (from-to)	235-246
Number of pages	12
Journal	Aquacultural Engineering
Volume	4
Issue number	4
DOIs	https://doi.org/10.1016/0144-8609(85)90016-0
State	Published - 1985

Bibliographical note

Funding Information:
This work has been supported by grant 03.509 from The Research and Development Co. Ltd, Bar-Ilan University, and by grant AQ 24 from the GKSS, Gessthecht-Tesperhude, FRG. We are sincerely grateful to Dr Harald Rosenthal, of the Biologische Anstalt Helgoland, Hamburg-Bahrenfeld, FRG, for his advice and help in editing this manuscript.

Funding

This work has been supported by grant 03.509 from The Research and Development Co. Ltd, Bar-Ilan University, and by grant AQ 24 from the GKSS, Gessthecht-Tesperhude, FRG. We are sincerely grateful to Dr Harald Rosenthal, of the Biologische Anstalt Helgoland, Hamburg-Bahrenfeld, FRG, for his advice and help in editing this manuscript.

Funders	Funder number
The Research and Development Co. Ltd	AQ 24

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10.1016/0144-8609(85)90016-0

Cite this

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title = "A laboratory scale recycling water unit for tilapia breeding",

abstract = "The technical features of a laboratory scale water recycling unit for experimental small scale tilapia breeding are described. Two units (1 and 2) were operated during a 6 month period, carrying a similar fish load (7·5 kg) and feeding rate (2% fish body weight/day). Unit 1 received natural illumination, while unit 2 was artificially illuminated (14/10 - light/dark cycle). Both units were equipped with a biological filter bed (substrate surface area, 3500 cm2). In unit 1, total ammonium and nitrite concentrations ranged from 0·05 to 0·5 mg liter-1, while nitrate varied between 10-40 mg liter-1. In unit 2 corresponding values were 0·15-3 mg liter-1, 0·05-0·8 mg liter-1 and 10-40 mg liter-1. Temperatures ranged between 20-29°C and pH values between 7·5-6·9 in both units. Dissolved oxygen concentrations decreased gradually from 5·6 to 3·4 mg liter-1 in unit 1 and from 5·6 to 2·6 mg liter-1 in unit 2. Twenty-six spawnings occurred in unit 1 in March and April, while only eight spawnings occurred in unit 2, possibly because of the absence of sunlight. The significance of these results are discussed.",

author = "M. Koiller and Avtalion, {R. R.}",

note = "Funding Information: This work has been supported by grant 03.509 from The Research and Development Co. Ltd, Bar-Ilan University, and by grant AQ 24 from the GKSS, Gessthecht-Tesperhude, FRG. We are sincerely grateful to Dr Harald Rosenthal, of the Biologische Anstalt Helgoland, Hamburg-Bahrenfeld, FRG, for his advice and help in editing this manuscript.",

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AU - Avtalion, R. R.

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N2 - The technical features of a laboratory scale water recycling unit for experimental small scale tilapia breeding are described. Two units (1 and 2) were operated during a 6 month period, carrying a similar fish load (7·5 kg) and feeding rate (2% fish body weight/day). Unit 1 received natural illumination, while unit 2 was artificially illuminated (14/10 - light/dark cycle). Both units were equipped with a biological filter bed (substrate surface area, 3500 cm2). In unit 1, total ammonium and nitrite concentrations ranged from 0·05 to 0·5 mg liter-1, while nitrate varied between 10-40 mg liter-1. In unit 2 corresponding values were 0·15-3 mg liter-1, 0·05-0·8 mg liter-1 and 10-40 mg liter-1. Temperatures ranged between 20-29°C and pH values between 7·5-6·9 in both units. Dissolved oxygen concentrations decreased gradually from 5·6 to 3·4 mg liter-1 in unit 1 and from 5·6 to 2·6 mg liter-1 in unit 2. Twenty-six spawnings occurred in unit 1 in March and April, while only eight spawnings occurred in unit 2, possibly because of the absence of sunlight. The significance of these results are discussed.

AB - The technical features of a laboratory scale water recycling unit for experimental small scale tilapia breeding are described. Two units (1 and 2) were operated during a 6 month period, carrying a similar fish load (7·5 kg) and feeding rate (2% fish body weight/day). Unit 1 received natural illumination, while unit 2 was artificially illuminated (14/10 - light/dark cycle). Both units were equipped with a biological filter bed (substrate surface area, 3500 cm2). In unit 1, total ammonium and nitrite concentrations ranged from 0·05 to 0·5 mg liter-1, while nitrate varied between 10-40 mg liter-1. In unit 2 corresponding values were 0·15-3 mg liter-1, 0·05-0·8 mg liter-1 and 10-40 mg liter-1. Temperatures ranged between 20-29°C and pH values between 7·5-6·9 in both units. Dissolved oxygen concentrations decreased gradually from 5·6 to 3·4 mg liter-1 in unit 1 and from 5·6 to 2·6 mg liter-1 in unit 2. Twenty-six spawnings occurred in unit 1 in March and April, while only eight spawnings occurred in unit 2, possibly because of the absence of sunlight. The significance of these results are discussed.

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A laboratory scale recycling water unit for tilapia breeding

Abstract

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