Survey of Ergosan additive effects on gain weight, perpetuity rate and food conversion index in Rainbow trout

Subject Areas : Veterinary Clinical Pathology

Sh  Notash ¹ (Departemant of Aquatic Diseases of Veterinary Medicen, Islamic Azad University, Tabriz Branch, Tabriz, Iran)
حمید  Mirzaei ² (Departemant of Food Hygiene, Faculty of Veterinary Medicen, Islamic Azad University, Tabriz Branch, Tabriz, Iran)
سعید  Sadigh Eteghad ³ (Student of Veterinary Medicine, Islamic Azad University, Tabriz Branch, Tabriz, Iran)

Received: 2008-08-23 Accepted : 2008-10-30 Published : 2008-05-21

Keywords: Ergosan, gain weight, perpetuity rate, food conversion,

Abstract :

    Evaluation of the effect of Ergosan additive on growth rate, feed conversion index and survival rate of 1gr Rainbow trout hatchlings. The purpose of the present study was to evaluate the effect of consumption of Ergosan additive on production indices of 1gr Rainbow trouts namely growth rate, feed conversion index and survival rate. Thus the effect of this additive was investigated by selecting five experimental groups (one control and four treatment groups) each consisting of 1500 fish with a weight of 1gram reared in exactly identical conditions. The treatment groups were fed 1, 2, 3 and 4 kg/ton of Ergosan with their diet for 60 days and the data were then analyzed. According to the results, Ergsan had the best effect on the production indices of the third treatment group (3 kg/ton) (p<0.05) and the least production indices were seen in the control group. Consequently, Ergosan additive at the rate of 3kg/ton for 2 months with an interval of 10 days can be included in the diet of Rainbow trouts with the body weight of 1 gram reared at the temperature of 12 ± 0.5 degrees Celsius.  

References:

1. صادقی، ن. (1380): پرورش قزل‌آلای رنگین‌کمان، انتشارات نقش مهر، صفحات: 26-2.


2. فرهانی، ر. (1383): راهنمای پرورش قزل‌آلای رنگین‌کمان، انتشارات نقش مهر، صفحات: 28-9.


3. وثوقی، غ. و مستجیر، ب. (1381): ماهیان آب شیرین، انتشارات دانشگاه تهران، صفحات: 10-1.
   
   
   1. Argent, D.G. and Flebbf, P.A. (2004): The effectes of Ergosan on brook trout eggs in laboratory streams, Fisheries Research, 39: 253-262.
   
   
   2. Bagni, M., Romano, N., Finoia, M.G., Abelli, L., Scapigliati, G. and Tiscar, P.G. (2005): Short-and long- term effects of a dietary yeast beta- glucan (Macrogard) and alginic acid (Ergosan) preparation on immune response in sea bass, Fish  Shellfish Immunol., 18: 311-325.
   
   
   3. Bilodeau, A.L. and Waldbieser, G.C. (2005): Activation of TLR3 and TLR5 in channel catfish exposed to virulent Edwardsiella ictaluri. Dev. Comp. Immunol., 29: 713-721.
   
   
   4. Jeremy, F., Robin, W., Chris, G. and Loredana, L. (2005): The use of immuno-modulators against disease and stress in trout. Aquaclture Vaccines  Itd., 12: 243-249.
   
   
   5. Meijer. A.H., Gabby Krens, S.F., Medina, I.A., He, S., Bitter,W. and Ewa Snaar, B. (2004): Expression analysis of the Toll-like receptor and TLR domain adaptor families of zebrafish. Molecular Immunology, 40: 773-783.
   
   
   6. Nickell, D.C. and Bromage, N.R. (2006): The effect of Ergosan on the development and variation of fillet colour and efficiency of pigmentation in rainbow trout (Oncorhynchus mykiss). Aquaculture, 169: 233-246.
   
   

10. Peddie, S., Zou, J. and Secombes, C.J. (2002): Immuno stimu lation in the rainbow trout (Oncorhynchus mykiss) following intraperitoneal administration of Ergosan. Veterinary Immunology and Immunopathology, 86: 101-113.

11. Peddie, S. and Wardle, R. (2005): AquaVac Ergosan enhances growth and survival in juvenile chinook salmon (Onchorynchustschawytscha). (Schering- Plough Animal Health Corporation, Aquaculture Business Unit).

12. Sakai, M. (1999): Current reaerch status of fish immunostimulants. Aquaculture, 172: 63-92.

13. Skjermo, J. and Bergh, O. (2004): High-M alginate immunostimulation of Atlatic halibut (Hippoglossus hippoglossus L.) Larvae using Artemia for delivery, increases resistance aqainst vibriosis. Aquaculture, 238: 107-113.