Aquaculture International

, Volume 11, Issue 3, pp 289–299

The effect of dietary coconut oil on reproductive traits and egg fatty acid composition in rainbow trout (Oncorhynchus mykiss)

  • Rodolfo Ballestrazzi
  • Simona Rainis
  • Francesca Tulli
  • Arianna Bracelli
Article

DOI: 10.1023/A:1024876024720

Cite this article as:
Ballestrazzi, R., Rainis, S., Tulli, F. et al. Aquaculture International (2003) 11: 289. doi:10.1023/A:1024876024720

Abstract

Two hundred and twenty rainbow trouts (IBW: 700 g) were randomly allotted to four tanks, with a male/female ratio of 0.56. Fish were fed for 168 d with four experimental diets containing herring oil, cod liver oil and coconut oil with the following inclusion rates: diet A: 12-1-0% respectively; diet B: 6-1-6%; diet C: 0-1-12%; diet D: 0-0-13%. Irrespective of the dietary treatment, weight gains of broodstocks were high (> 3 g/d) and FCR below 2. No significant difference was observed concerning the total amount of eggs spawn, egg average weight (82.5 mg/egg) and lipid content (5.4 mg/egg). However, the fatty acid profile of eggs was significantly affected by the dietary treatments. The content of unsaturated fatty acids, particularly the n-3 fatty acid series (EPA and DHA) significantly decreased with increasing levels of coconut oil in the diet.

Coconut oil Eggs Fatty acids Oncorhynchus mykiss Rainbow trout Reproduction 

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Rodolfo Ballestrazzi
    • 1
  • Simona Rainis
    • 1
  • Francesca Tulli
    • 1
  • Arianna Bracelli
    • 1
  1. 1.Dipartimento di Scienze della Produzione AnimaleUniv. degli Studi di UdinePagnaccoItaly