scholarly journals Effects of replacement of black soldier fly (Hermetia illucens) larvae meal in the diets on growth performance of discus fish (Symphysodon sp.)

2019 ◽  
Vol 18 (5) ◽  
pp. 33-42
Author(s):  
Tu P. C. Nguyen
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Survival Rates ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
The Other ◽  
Beef Heart ◽  
Feed Conversion ◽  
Black Soldier Fly ◽  
Hermetia Illucens

This study was conducted to evaluate the replacement of fishmeal by black soldier fly larvae (Hermetia illucens) (BSF) meal, frozen beef heart, and commercial pellet on growth performance, survival rate, and feed utilization of discus fish (Symphysodon sp.). Discus juveniles were graded into small, medium and large size groups as block in a completely randomized block design. Five trial diets included frozen beef heart (T1), commercial feed for discus fish (T2) and three diets containing graded levels of BSF as replacements for protein from fishmeal of 0% (T3), 25% (T4), and 50% (T5). The results showed that TAN and nitrite levels in the beef heart treatment were higher than those in the other ones. Moreover, discus fish in treatment 1 had a higher growth rate and a lower feed conversion ratio than those in the other treatments. On the other hand, no statistically significant differences among the pellet treatments were observed for growth rates of discus's weight, length and height and feed conversion ratio (P > 0.05). Moreover, the results showed that discus fish in the two BSF treatments did not suffer from diseases and had higher survival rates than those in the other treatments.

Effect of Thunbergia laurifolia leaves on the growth performance, nutrient digestibility and liver antioxidant enzymes of broilers fed mycotoxin-contaminated feed

2020 ◽  
Vol 60 (16) ◽  
pp. 1885
Author(s):  
Chatchai Donkotjan ◽  
Chutamas Benjanirut ◽  
Kris Angkanaporn
Keyword(s):  
Antioxidant Enzymes ◽  
Glutathione Peroxidase ◽  
Growth Performance ◽  
Nutrient Digestibility ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
The Other ◽  
Feed Conversion ◽  
Glutathione Peroxidase Activity ◽  
Thunbergia Laurifolia

Context Contamination of feedstuff with mixed mycotoxins is one of the frequent problems found in broiler chicken production, especially in tropical countries with a hot and humid climate, such as Thailand. Aims An in vivo study was conducted to examine the effects of Thunbergia laurifolia Linn. (TL) leaves on the growth performance, nutrient digestibility and antioxidant enzyme activity of broiler chicks fed naturally mycotoxin-contaminated feed. Methods In total, 375 1-day-old male Arbor Acre broilers were allotted into five experimental groups, with five replicates each (15 chicks per replicate). The experimental groups were mycotoxin-free basal corn–soybean diet (T1, control), diet with mixed mycotoxins (aflatoxin, fumonisins, tricothecene and ochratoxin, T2), T2 diet but supplemented with 1% (w/w) yeast glucomannan (GM, T3), T2 diet but supplemented with 2% (w/w) TL (T4) and T2 diet but supplemented with both 2% (w/w) TL and 1% (w/w) GM (T5). Feed intake, bodyweight gain, feed conversion ratio, mortality rate, nutrient digestibility and the activity of antioxidant enzymes were measured at Days 21 and 42. Key results Broilers in T4 and T5 groups had a significantly (P < 0.05) higher nutrient digestibility than those in the other groups at Day 42, while broilers in the T3, T4 and T5 groups had a significantly (P < 0.05) higher glutathione peroxidase activity than those in the other groups. There was no difference in the growth performance among the groups, except chicks that received the mixed mycotoxin-contaminated feed had a higher feed conversion ratio and ate more feed than did those in the control group. Conclusion It is concluded that 2% TL and 1% GM helped ameliorate the adverse effect of mycotoxin, improving nutrient digestibility and increased the glutathione peroxidase activity, but without a significant change in growth rate. Implications Herbal plant TL can be used as an alternative mycotoxin adsorbent in broiler production.

scholarly journals Variation in Growth Performance and Carcass Yield of Pure and Reciprocal Crossbred Turkeys

2015 ◽  
Vol 15 (1) ◽  
pp. 51-66 ◽  
Author(s):  
Krzysztof Damaziak ◽  
Monika Michalczuk ◽  
Żaneta Zdanowska-Sąsiadek ◽  
Jan Niemiec ◽  
Dariusz Gozdowski
Keyword(s):  
Mortality Rate ◽  
Growth Performance ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
The Other ◽  
Feed Conversion ◽  
Reciprocal Crosses ◽  
Orthogonal Contrasts ◽  
Study Results ◽  
Slow Growing

AbstractThis study compared growth, feed conversion ratio (FCR), mortality rate and results of slaughter analysis of slow-growing Bronze turkeys (SG), fast-growing Big 6 turkeys (FG), and their reciprocal crosses (SF and FS). Until 6 weeks of age the birds were kept indoors and afterwards they were allowed to use free ranges. Toms were reared until 21 and hens until 15 weeks of age. The FS turkeys were characterized by higher (P≤0.05) BW and dressing percentage and by lower FCR compared to the SF crosses of both sexes. The analysis of orthogonal contrasts demonstrated that values of most of the slaughter analysis parameters were due to the additive effect of genes. Only weight of skin with fat and of gizzard could result from heterosis. Study results demonstrate that FS crosses constitute better material for the alternative production of turkeys compared to the other analysed groups (SG, SF, FG).

scholarly journals Growth of Black Soldier Fly Larvae Reared on Organic Side-Streams

2021 ◽  
Vol 13 (23) ◽  
pp. 12953
Author(s):  
Laurens Broeckx ◽  
Lotte Frooninckx ◽  
Laurien Slegers ◽  
Siebe Berrens ◽  
Isabelle Noyens ◽  
...  
Keyword(s):  
Larval Growth ◽  
Survival Rates ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Waste Reduction ◽  
High Survival ◽  
Feed Conversion ◽  
Black Soldier Fly ◽  
Low Protein ◽  
Highly Correlated

Black soldier fly (BSF) larvae may play a role in a circular economy by upcycling low-value organic streams into high value biomass. In this paper, the capacity of BSF larvae to process 12 organic side-streams (mono-streams) and two standard substrates (chicken start mash and Gainesville diet) was investigated. Survival, larval mass, feed conversion ratio, and waste reduction were evaluated in relation to the proximate composition of the side-streams used. Survival rates larger than 80% were observed for 10 of the organic mono-streams and the two standard substrates. Maximum mean larval weight ranged from 38.3 mg up to 176.4 mg regardless of high survival and was highly correlated with substrate crude protein content. Feed conversion ratio (range 1.58–8.90) and waste reduction (range 17.0–58.9%) were similar to values reported in other studies in the literature. On low protein substrates (e.g., apple pulp), survival rates remained high, however, possibly due to protein deficiency, limited larval growth was observed. It is concluded that several low value organic side-streams can successfully be processed by BSF larvae, thereby opening the possibility of lowering the costs of BSF farming. Potentially mixing nutritionally distinct mono-streams into a mixed substrate might improve BSF performance. However, more research is needed for optimizing diets to guarantee production of BSF larvae of constant yield and quality.

scholarly journals Effects of Different Swimming Pool Conditions and Floor Types on Growth Performance and Footpad Dermatitis in Indoor-Reared White Roman Geese

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1705
Author(s):  
Shih-Chieh Liao ◽  
Pei-Xuan Lu ◽  
Shih-Yi Shen ◽  
Chih-Chang Hsiao ◽  
Ching-Yi Lien ◽  
...  
Keyword(s):  
Growth Performance ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Swimming Pool ◽  
Poultry Production ◽  
Performance Measurements ◽  
Feed Conversion ◽  
Plantar Surface ◽  
Rearing Conditions ◽  
Foot Disease

Footpad dermatitis (FPD) is a major foot disease in modern poultry production, and it affects both poultry health and animal welfare. It refers to inflammation and necrotizing lesions on the plantar surface of the footpads and toes. We investigated the effects of providing a swimming pool and different floor types on growth performance and FPD score in indoor-reared White Roman geese. Forty-eight male and 48 female White Roman geese were randomly allocated to pens with or without a swimming pool and with either mud or perforated plastic floor and reared from 15 to 84 days of age. Growth performance measurements included feed intake (FI), weight gain (WG), and feed conversion ratio (FCR). FI, WG, and FCR were significantly decreased at various growth periods in geese provided with a pool. Lower WG and bodyweight for the perforated plastic floor group were found at 15–28 and 28 days of age, respectively. The geese reared on the perforated plastic floors without a pool had higher FPD scores at 70 and 84 days of age than those with other rearing conditions. A higher incidence of FPD score 1 was observed in geese raised without a pool. In conclusion, providing a pool can improve footpad health in indoor-reared White Roman geese but may not benefit growth performance.

scholarly journals Growth performance and fattening ability in castrated male and female East Balkan pigs reared organically in Strandzha mountain

2020 ◽  
Vol 23 (1) ◽  
pp. 44-54
Author(s):  
Nadezhda Palova ◽  
Jivko Nakev ◽  
Teodora Popova ◽  
Maya Ignatova
Keyword(s):  
Growth Performance ◽  
Average Daily Gain ◽  
Live Weight ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Daily Weight Gain ◽  
Feed Conversion ◽  
Average Daily Weight Gain ◽  
The Difference ◽  
Daily Gain

Abstract(An experiment with two groups of East Balkan pigs – castrated males (n=10) and females (n=10), was carried out to study the growth performance and fattening abilities of the animals from the weaning until slaughter. The pigs were included in the trial at 60 day age. The average live weight of the castrated males was 8. 65±1.08 kg and for the females, 8.5±0.62 kg.The pigs were reared using traditional technology, grazing on natural pastures in the Strandzha mountain, Bulgaria. In autumn, acorns were naturally present in their diet. According to the category, the animals additionally received ground organic feed (50% barley and 50% wheat). The trial lasted 304 days (from February to November, 2019). During this period the final live weight of the male castrated pigs reached 88.00 kg while that of the females was 84.4 kg. The difference, however, was not significant. Furthermore, no significant differences in the growth performance characteristics that could be attributed to the sex of the animals were observed. The average daily gain of both sexes tended to be lower in summer and higher in autumn. The feed conversion ratio was higher in summer. The animals showed high average daily weight gain at pasture when their live weight was over 50 kg.

scholarly journals Suitability of artisanal fishery discards as feed for juvenile tub gurnard (Chelidonichthys lucerna L.) reared in sea bottom cages in the mid Adriatic Sea

2016 ◽  
Vol 17 (3) ◽  
pp. 644
Author(s):  
A. RONCARATI ◽  
F. MARIOTTI ◽  
A. FELICI ◽  
M. MELIGRANA ◽  
P. MELOTTI
Keyword(s):  
Adriatic Sea ◽  
Survival Rates ◽  
Condition Index ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Artisanal Fisheries ◽  
Artisanal Fishery ◽  
Feed Conversion ◽  
Sea Bottom ◽  
Fishery Discards

The suitability of using discards from artisanal fisheries as feed for wild-caught Chelidonichthys lucerna (L.) reared in submerged cages in the Adriatic Sea was investigated. Three-hundred juvenile tub gurnard (72.9 ± 11 g, 18 ± 1 cm) were captured and separated into four circular 35.3 m3 submerged cages. Two stocking densities were used: two cages contained 60 fish each (1.7 fish m-3; CG-L) and two cages contained 90 fish each (2.55 fish m-3; CG-H). Growth performance and survival rates were recorded over a 240 day period during which tub gurnard were fed with a variety non-target fishery discards, including common crab, sardine, Atlantic chub mackerel, anchovy, and salema. The survival rate was approximately 90% in both groups (CG-L = 91% and CG-H = 90%), with final stocking densities of 0.32 kg m-3 and 0.49 kg m-3 for the CG-L and CG-H groups, respectively. There were no significant differences in final mean body weight or length between the CG-L group (206 ± 23 g, 24.6 ± 2 cm) and the CG-H group (215.5 ± 32 g, 24.8 ± 2 cm). The condition index was similar between the two groups (1.38 and 1.42 for CG-L and CG-H, respectively). The feed conversion ratio was high in both the CG-H (2.39) and CG-L (2.32) cages. These results demonstrate that viable growth rates of tub gurnard may be obtained by feeding recycled fishery discards and rearing in cages placed on the seabed, which allows for the natural benthic behavior of this species.

Feed Characteristics Alter Growth Efficiency of Cutthroat Trout

2015 ◽  
Vol 6 (1) ◽  
pp. 83-91 ◽  
Author(s):  
Brian R. Ham ◽  
Christopher A. Myrick ◽  
Frederic T. Barrows ◽  
Carl J. Yeoman ◽  
Glenn C. Duff ◽  
...  
Keyword(s):  
Cutthroat Trout ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
The Other ◽  
Snake River ◽  
Feed Conversion ◽  
Initial Weight ◽  
Feeding Trial ◽  
Westslope Cutthroat Trout ◽  
Fish Tank

Abstract Hatchery-cultured cutthroat trout Oncorhynchus clarkii fed some commercially available rainbow trout feeds display slow growth and increased mortality. Feed characteristics such as buoyancy and texture alter feed acceptance in some fish species, but their effects have not been adequately addressed in cutthroat trout. Therefore, the objective of this study was to examine whether feed structure and behavior preferences explain the decreased hatchery performance of juvenile cutthroat trout. To achieve this, we conducted two feeding trials in which we fed Westslope cutthroat trout O. clarkii lewisi and Snake River finespotted cutthroat trout O. clarkii behnkei a single diet formulation manufactured to display four different characteristics (floating, sinking, semimoist pellets, or a flake feed) and compared consumption, weight gain, and survival. In the first feeding trial, we stocked Westslope cutthroat trout (initial weight 11.3 g ± 0.5 g) at 20 fish/tank. We used two different sizes of tanks, with four replicate small tanks (54-L) and two replicate large tanks (96-L) per feed type. Results of the first trial demonstrated a significant effect of feed type but not tank size on weight gain of Westslope cutthroat trout with no interaction. Westslope cutthroat trout fed the flake feed gained less weight than did fish fed any of the other feed types. Feed conversion ratio was affected by both feed type and tank size with no interaction. In a second feeding trial, Snake River cutthroat trout (initial weight 19.5 g ± 0.5 g) were stocked at 20 fish/tank in 96-L tanks with four replicate tanks per feed type. Results of the second trial demonstrated that Snake River cutthroat trout fed the flake feed grew less, had higher feed conversion ratio, elevated hepatosomatic index, and reduced muscle ratio compared with fish fed the other feeds. Results demonstrate that flake feeds are not adequate for cutthroat trout at this life stage. However, additional research is needed to address other culture-related limitations because only minor differences between fish fed other feed types were detected.

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