Influence of defensible and indefensible pattern of food delivery upon the development of feeding anticipatory activity (FAA) and growth performance in rainbow trout (Oncorhynchus mykiss)

2011 ◽  
Vol 61 (1) ◽  
pp. 95-109
Author(s):  
M. Saeed Heydarnejad
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Growth Parameters ◽  
Feeding Activity ◽  
Food Delivery ◽  
Fish Growth ◽  
Restricted Feeding ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Anticipatory Activity

AbstractUsing two methods of food delivery, defensible (D) and indefensible (ID), the effect of restricted feeding (RF) on the development of feeding anticipatory activity (FAA) and growth performance of rainbow trout (Oncorhynchus mykiss) was investigated. Six glass aquaria (120 × 30 × 80 cm), divided equally into 3 sections of morning, afternoon and evening of location of food delivery each with eight fish were selected for D and ID methods. The fish were subjected to a time-RF schedule for 70 days. Food delivery was restricted to three feeding periods; one hour per feeding session: morning (0800-0900 h), afternoon (1300-1400 h) and evening (1800-1900 h). Food was withheld on days 28, 42, 56 and 70 (test days) to assess FAA by the fish and fish growth parameters were determined at the end of the experiment. The present results clearly indicate that only using an indefensible (ID) pattern of food delivery, rainbow trout can simultaneously anticipate three daily meals and synchronise their feeding activity before the period of food availability and that the best FCR and SGR were achieved when an ID pattern of food delivery was offered. The lack of development of FAA for fish in the D method could be due to development of dominant hierarchies. This led to reduction of most growth parameters in the D method compared to the ID one.

scholarly journals Tarçın (Cinnamomum verum) Yağının Gökkuşağı Alabalığı (Oncorhynchus mykiss) Büyüme Performansı ve Kan Parametreleri Üzerine Etkileri

2019 ◽  
Vol 7 (2) ◽  
pp. 370
Author(s):  
Osman Sabri Kesbiç
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Blood Parameters ◽  
Serum Glucose ◽  
Fish Growth ◽  
Control Group ◽  
Cinnamon Oil ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Albumin Content

In this study, the effects of supplementation of cinnamon oil on rainbow trout (Oncorhynchus mykiss) feeds on fish growth performance, feed evaluation and blood parameters were investigated. In this scope, experimental diets containing cinnamon oil at 5 different concentrations of 0 mL/kg (TY0), 1 mL/kg (TY1), 2 mL/kg (TY2), 4 mL/kg (TY4) and 10 mL/kg (TY10) were prepared. During the 60 days of the study, the rainbow trout weights of 10,68±0,35 g were used and the experiment was carried out in 100 L volume aquariums with 5 groups of 3 replicate. In the feeding experiment, growth performance and feed utilization of the groups fed with cinnamon oil increased significantly compared to the control group. It was determined that cinnamon oil had significantly increasing effect on erythrocyte, hemoglobin amount and hematocrit ratio in fish. In addition, cinnamon oil decreased the level of serum glucose, triglyceride and cholesterol in the fish, and increased the total protein and albumin content. As a result, feed containing 4 mL/kg of cinnamon oil was affected fish growth performance and blood parameters positively.

scholarly journals Effects and Safe Inclusion of Narbonne Vetch (Vicia narbonensis) in Rainbow Trout (Oncorhynchus mykiss) Diets: Towards a More Sustainable Aquaculture

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2175
Author(s):  
Cristina Tomás-Almenar ◽  
Francisco Javier Toledo-Solís ◽  
Ana M. Larrán ◽  
Eduardo de Mercado ◽  
Francisco Javier Alarcón ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Raw Materials ◽  
Fish Growth ◽  
Control Group ◽  
Poor Growth ◽  
Histopathological Alterations ◽  
Vicia Narbonensis ◽  
Rainbow Trout Oncorhynchus Mykiss

Aquaculture’s sustainability deeply relies on the identification and inclusion of alternative raw materials. Although meals from insects and/or byproducts from different industries are being recently tested, the meal from terrestrial vegetable species is still the main substitution candidate for fish meal. Here the effects of 0% (Control), 10% (A10) and 30% (A30) inclusion of Narbonne vetch (Vicia narbonensis; ZV-156 strain) meal in rainbow trout (Oncorhynchus mykiss) diets was assessed in a 63-day feeding trial by means of growth performance, histopathological, nutritional value of the fish fillet and blood biochemistry analyses. A dose-response trial was conducted in triplicate with 25 rainbow trout juveniles (20 g average body weight) per 500 L tank. Narbonne vetch meal decreased total intestine protease activity in vitro (from 26.81% to 48% inhibition), although high temperature partially inhibited the action of antinutritional factors (ANFs). No differences in fish growth performance and no severe histopathological alterations on the proximal intestine were observed between 10% Narbonne vetch inclusion and Control groups. In contrast, high inclusion (30%) of Narbonne vetch led to poor growth performance (30% reduction on final growth) and severe histopathological alterations (e.g., loss of brush border integrity, high number of villi fusion, reduced goblet cells density as well as reduced width of submucosa, muscular and serosa layers). Furthermore, while the A30 diet decreased docosahexaenoic fatty acid (FA) content in fish fillets, the A10 diet improved monounsaturated FA content when compared to that of the Control group. No altered levels of cholesterol, glucose or triglycerides in blood plasma and/or histopathological effects on the liver were observed among fish fed the different experimental diets. Although further research efforts (e.g., identifying potential enzymatic treatments to decrease the action of ANFs from Narbonne vetch meal) might be required, present results show that a low inclusion (10%) of Narbonne vetch in rainbow trout diets is possible. The inclusion of locally produced legumes such a Narbonne vetch might be an interesting approach to reduce carbon footprint in European aquaculture and the dependency on other alternative raw materials such as soybean (Glycine max) imported from third countries.

scholarly journals Graded Incorporation of Defatted Yellow Mealworm (Tenebrio molitor) in Rainbow Trout (Oncorhynchus mykiss) Diet Improves Growth Performance and Nutrient Retention

Animals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 187 ◽  
Author(s):  
Paulo Rema ◽  
Subramanian Saravanan ◽  
Benjamin Armenjon ◽  
Constant Motte ◽  
Jorge Dias
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Tenebrio Molitor ◽  
Nutrient Digestibility ◽  
Protein Meal ◽  
Yellow Mealworm ◽  
Juvenile Rainbow Trout ◽  
Rainbow Trout Oncorhynchus Mykiss

Insects are emerging as a sustainable alternative to fishmeal and fish oil in aquafeeds. This study assessed the effect of graded incorporation levels of defatted yellow mealworm (Tenebrio molitor) protein meal on juvenile rainbow trout (Oncorhynchus mykiss) growth performance, body composition, and apparent nutrient digestibility. The trial comprised five dietary treatments: control diet with 25% fishmeal, and four experimental diets with yellow mealworm protein meal at 5%, 7.5%, 15%, or 25%, which corresponded to a fishmeal replacement of 20%, 30%, 60%, or 100%, respectively. After 90 days, the graded incorporation of insect protein meal led to a significant stepwise increase in final body weight, and a significant improvement of specific growth rate, feed conversion ratio, and protein efficiency ratio compared to the control treatment. Regardless of the incorporation level, the insect protein meal had no effects on fish whole-body composition and apparent digestibility coefficients of dry matter, protein, fat, phosphorus, and energy. Protein, phosphorus, and energy retention significantly increased in fish fed the diets with an insect protein meal. In conclusion, the yellow mealworm protein meal could effectively replace 100% of fishmeal in the diet of juvenile rainbow trout with positive effects on its overall zootechnical performance.

scholarly journals Pike-Perch (Sander lucioperca) and Rainbow Trout (Oncorhynchus mykiss) Fed with an Alternative Microorganism Mix for Reducing Fish Meal and Oil—Fishes’ Growth Performances and Quality Traits

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1799
Author(s):  
Michaela Schafberg ◽  
Karin Loest ◽  
Andreas Müller-Belecke ◽  
Sascha Rohn
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Fish Meal ◽  
Control Diet ◽  
Sander Lucioperca ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Growth Performances ◽  
Pike Perch ◽  
Carcass Parameters

In the last decades, several plant-based materials were used for the substitution of fish meal and oil in aquaculture. The present study evaluated the fish quality and the sensory differences of rainbow trout (Oncorhynchus mykiss) and pike-perch (Sander lucioperca) from three different feeding groups, which were fed a commercially available industrial (standard) diet, a control diet, and a special microorganism-based feed mix. This feed mainly consisted of a mix made of Rhodotorula glutinis, Crypthecodinium cohnii, and Arthrospira sp. and had 50% less fish meal and fish oil compared to typical control diets. At the beginning, the pike-perch population was six months old, and the rainbow trout population was 15 months old. The feeding study duration was 16 weeks and every four weeks the growth performance and several morphometric parameters were recorded. Afterwards, sensory evaluation took place to identify possible trends. Sensory evaluation revealed that the rainbow trout groups did not show any significant differences to the standard and control fish fillets with regard to odor, texture, and taste. The effects on rainbow trout growth performances and carcass parameters were similar to the standard group. The feed mix was not optimal for pike-perch farming, which was also reflected by significantly adversely affected growth performance and carcass parameters. The sensorial evaluation showed an opposite trend: here, only small differences in the fillets from the feed mix and standard/control diet were observed.

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