African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Full Length Research Paper

Effect of weight on osmoregulation ability in Rutilus frisii kutum fingerlings

Seyed Ali Hosseini1, Che Roos Saad1*, Seyed Ahmad Hosseini2, Mohammad Sayyad Bourani3, Hassan Mohd Daud4 and Sharr Azni Harmin5    
1Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. 2Kermanshah Branch, Islamic Azad University, Kermanshah, Iran. 3National Inland Waters Aquaculture Institute, Aquaculture Department, P.O. Box 66, Bandar Anzali, Iran. 4Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia. 5Center for Land and Aquatic Technology Faculty of Science and Biotechnology, University Selangor, 40000 Shah Alam, Selangor, Malaysia.    
Email: [email protected]

  •  Accepted: 28 December 2011
  •  Published: 09 February 2012

Abstract

Experiments were conducted to study the downstream migratory behavior and effects of weight on osmoregulation ability of hatchery-reared Rutilus frisii kutum fingerlings during adaptation to the seawater. Accordingly, blood osmotic pressure regulation ability in kutum fingerlings with weights of 1, 3, 5 and 7 g in three different salinities, 13 ppt (Caspian Sea salinity), 7 ppt (estuarine area) and 0.3 ppt (freshwater) were assessed. The blood samples were collected before being transferred as control (freshwater) and after exposure to the sea and estuarine water in a period of up to 336 h by a pooling method. The results indicate that only 3, 5 and 7 g kutum are able to adapt to salinity of 7 and 13 ppt since they maintained the osmolarity. In 1 g kutum, the levels of osmotic pressure showed significantly higher values after 48 h until the end of the experiment compared to other weight groups and the respective control level (P<0.05). In conclusion, the results show that osmoregulation systems in 1 g fingerlings were not able to decrease the osmotic pressure. Therefore, they cannot be suggested as suitable sizes to be released into the brackish and marine environments.

 

Key words: Rutilus frisii kutum, osmotic pressure, salinity, weight, Caspian Sea.

Abbreviation

 

Abbreviations: ANOVA, Analysis of variance; CSW, Caspian Sea water; DMRT,Duncan’s multiple range test; DO, dissolved oxygen; EW, estuarine area water; FW,fresh water; IFRO, Iranian Fisheries Research Organization; mOsm L-1, milliosmoles per liter.

Copyright © 2024 Author(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

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