scholarly journals How the Use of Orange (Citrus sinensis) Peel Essential oil Affected the Growth Performance of Rainbow Trout (Oncorhynchus mykiss)?

2018 ◽  
Vol 75 (1) ◽  
pp. 16
Author(s):  
Nejdet GÜLTEPE
Keyword(s):  
Growth Rate ◽  
Rainbow Trout ◽  
Essential Oil ◽  
Raw Materials ◽  
Water System ◽  
Orange Peel ◽  
Fish Feed ◽  
Feed Conversion ◽  
Oil Additives ◽  
Rainbow Trout Oncorhynchus Mykiss

The most important portion of the aquaculture production with 40-60% of the operating expenses is the feed cost. The decline in natural fish stocks and the resulting increase in the cost of fish meal have led to feed producers and researchers to search for new and/or alternative raw materials for fish feed production. Orange peel essential oil (EO) contains 94.72% D-limonene. Four essential oil supplemented diets (0%, 0.5‰, 1‰ and 3‰) prepared for rainbow trout juvenile. Four groups fish were stocked 100 L aquarium (55 fish per aquarium) with free flow water system for triplicate study in 90 days feeding trial. At the end of the 90-days experimental feeding period; feed conversion ratio is importantly decreased, relative growth rate, specific growth rate and protein efficiency ratio are importantly increased at the 1‰ rate orange peel essential oil additives group (p<0.05).

scholarly journals Enhancement of growth performance and hematological changes in rainbow trout (Onchorhynchus mykiss) alevins fed with Bifidobacterium bacteria

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Javad Sahandi ◽  
Hojatollah Jafaryan ◽  
Mehdi Soltani ◽  
Pouneh Ebrahimi
Keyword(s):  
Growth Rate ◽  
Rainbow Trout ◽  
Growth Performance ◽  
Feed Conversion ◽  
Growth And Survival ◽  
Commercial Diet ◽  
Positive Effects ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Significant Difference ◽  
Hematological Changes

The study of probiotic application as an important rearing strategy was started more than 30 years ago and most of these studies were carried out to increase growth and survival of larvae. Effect of Bifidobacterium animalis PTTC-1631 and B. lactis PTTC-1736 as probiotic supplement has been studied on growth performance and hematological changes on rainbow trout, Oncorhynchus mykiss alevins with initial body weight of 0.583 ± 0.197 g. The commercial diet was supplemented with graded levels of probiotics (1×107, 2×107 and 3×107 CFU g-1 dry feed) to obtain 3 sets of experimental diets (T1, T2, andT3 respectively) and fed four times a day for 60 days. T1 alevin showed the best growth performance in terms of specific growth rate, weight gain, metabolic growth rate, feed conversion ratio and survival rate. The highest red and white blood cell concentrations were noticed in fish fed T2 and T3 diets, respectively, no significant difference was observed in hemoglobin content. T1 showed the significant elevation of serum biochemical parameters and reduction of cortisol level. The results of present study might suggest likely positive effects of probiotic supplements with concentration of 1×107 CFU g-1 dry feed on growth and hematology on rainbow trout alevins.

scholarly journals Apparent Digestibility of Macronutrients and Fatty Acids from Microalgae (Schizochytrium sp.) Fed to Rainbow Trout (Oncorhynchus mykiss): A Potential Candidate for Fish Oil Substitution

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 456
Author(s):  
Amélie Bélanger ◽  
Pallab K. Sarker ◽  
Dominique P. Bureau ◽  
Yvan Chouinard ◽  
Grant W. Vandenberg
Keyword(s):  
Fatty Acids ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Fish Oil ◽  
Nutrient Digestibility ◽  
Fish Feed ◽  
Potential Candidate ◽  
Apparent Digestibility ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Aquaculture Feed

Aquaculture feed formulation has recently turned its focus to reduce the reliance on marine-derived resources and utilise alternative feedstuffs, as an approach to improve the environmental sustainability of the aquaculture sector. The fish oil market is highly volatile, and availability of this commodity is continuously decreasing for use in aquaculture. Currently, a growing number of commercial efforts producing microalgae are providing omega 3-rich oil for sustainable aquaculture feed. This study was focused to determine the nutrient digestibility of a marine microalga, Schizochytrium spp., which is rich in docosahexaenoic acid (DHA) and long-chain polyunsaturated fatty acids (LC-PUFA), as a novel dietary lipid source that could be utilized effectively by rainbow trout (Oncorhynchus mykiss). A whole-cell Schizochytrium spp. biomass was used in the digestibility experiment at two different temperatures, 8 °C and 15 °C. No significant differences were detected between the two temperatures for the apparent digestibility coefficients (ADCs) of the dry matter (94.3 ± 4.9%), total lipids (85.8 ± 0.0%), crude proteins (89.5 ± 1.8%), energy (83.1 ± 1.7%) and fatty acids (85.8 ± 7.5%). The ADCs of the nutrients, energy, DHA and other fatty acids showed that Schizochytrium spp. is a high-quality candidate for fish oil substitution and supplement of LC-PUFA in fish feed with vegetable oils.

The impact of restricted rationing upon growth, food conversion efficiency and body composition of rainbow trout

1995 ◽  
Vol 31 (10) ◽  
pp. 219-223 ◽  
Author(s):  
M. Tomec ◽  
Z. Teskeredžic ◽  
E. Teskeredžic ◽  
M. Hacmanjek ◽  
E. McLean
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Conversion Efficiency ◽  
Food Conversion ◽  
Lipid Levels ◽  
Feed Conversion ◽  
Body Lipid ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Feeding Regimes ◽  
The Impact

Juvenile rainbow trout, Oncorhynchus mykiss, maintained under commercial conditions, were subjected to four different feeding regimes. Duplicate groups of fish were fed to satiation 3 times/d for either 7, 3, 2 or 1 d/wk over a 10 wk period. At the end of the trial, evaluations were made of group growth performance, body composition, and feed conversion efficiency (FCE). At the end of the experiment, no differences were discerned between fish fed either daily or 3 times/wk with respect to growth, FCE or body composition. Animals placed upon the two lowest rations were significantly smaller (P&lt;0.05) than those fed daily and exhibited decreased condition factors and body lipid levels (P&lt;0.05) and increased moisture content (P&lt;0.05). Food conversion was least efficient in those fish provided the largest ration.

scholarly journals Effect of fermented rice bran flour in artificial feed on survival rate and feed conversion ratio of tilapia, Oreochromis niloticus (Linnaeus, 1758)

2021 ◽  
Vol 21 (3) ◽  
pp. 267-276
Author(s):  
Surianti Surianti ◽  
Hasrianti Hasrianti ◽  
Wahyudi Wahyudi ◽  
Muh Irwan
Keyword(s):  
Rice Bran ◽  
Survival Data ◽  
Raw Materials ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Fish Feed ◽  
Feed Conversion ◽  
A Value ◽  
Randomized Design ◽  
Average Size

Tilapia cultivation has the potential to be developed in Indonesia, especially in South Sulawesi. However, the obstacle faced in tilapia cultivation is feed; the price is relatively high because the raw materials are still imported. One of the efforts to overcome dependence on imported feed raw materials is using local raw materials, namely rice bran. This study aims to determine the best type of probiotic in hydrolyzing rice bran flour into artificial feed on survival and conversion ratio of tilapia fish feed. This research was conducted in Sidenreng Rappang Regency. The test animals used were tilapia larvae with an average size of 1.03 g. The maintenance container is a tarpaulin pond with a size of 1 m x 1 m x 1 m filled with 85 L of freshwater. The study was designed using a completely randomized design consisting of four treatments and three replications. The fermenting materials used as treatment were Bacillus sp., Lactobacillus sp., Aspergillus nigers, Yeast (Acetobacter). The test feed was given to 20 tilapia larvae stocked in each container for 60 days of rearing. The survival data and feed conversion ratio for tilapia were analyzed using analysis of variance (ANOVA). The results showed that tilapia fed fermented rice bran feed using the fermenter Lactobacillus sp. had a significant effect on survival (SR) with a value of 85% and the feed conversion ratio (FCR) of tilapia with a value of 2.23.

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