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.

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.

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.

PREDICTION OF DAILY GAIN, BACKFAT THICKNESS AND FEED CONVERSION RATIO AMONG CROSSBRED TERMINAL SIRES BETWEEN PUREBRED DUROC, PIETRAIN, AND LANDRACE BY CBE 4.0 SOFTWARE

2018 ◽  
Vol 1 (29) ◽  
pp. 72-81
Author(s):  
Hop Van Nguyen ◽  
Tinh Huu Nguyen ◽  
Hoa Van Tran ◽  
Kinh Van La
Keyword(s):  
Research And Development ◽  
High Reliability ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Backfat Thickness ◽  
Feed Conversion ◽  
Significant Difference ◽  
Pig Farm ◽  
Development Center ◽  
Daily Gain

The objective of the study is to compare the practical results with the predicted results by Crossbreeding Effects (CBE) software on pig crossbred based on daily gain, backfat thickness and feed conversion ratio. Another purpose of this study is to predict those three traits among some expected hybridization. This research was conducted on pig farm at Binh Thang Research and Development center from 2013 to 2017. In this study, for each pair of purebred Duroc and Pietrain, Duroc and Landrace, Pietrain and Landrace, twelve hybridizations were analyzed, nine unhybridizations were predicted by CBE software. The results showed that there was no significant difference between the predicted and actual data. With some unhybridization crossbred , the predictions showed high reliability (P<0.05). Based on the predicted data of CBE software , some traits of the crossbred animals would not be improved, therefore, it was not necessary to conduct these hybridizations

scholarly journals KAJIAN PEMANFAATAN SEKAM PADI YANG DIFERMENTASI EFFECTIVE MICROORGANISM-4 (EM-4) DISUPLEMENTASI DAUN SIRIH (Piper betle L) TERHADAP PERFORMANS DAN KARKAS ITIK BALI UMUR 22 MINGGU

2018 ◽  
Vol 21 (3) ◽  
pp. 96
Author(s):  
Partama I. B. G. ◽  
T. G. Belawa Yadnya ◽  
A. A. A. S. Trisnadewi ◽  
A. A. P. P. Wibawa ◽  
I. M. Mudita
Keyword(s):  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Piper Betle ◽  
Feed Conversion ◽  
Effective Microorganism

Penelitian bertujuan untuk mengetahui pengaruh pemanfaatan sekam padi difermentasi larutan EffectiveMicroorganism-4 (EM-4) dalam ransum disuplementasi daun sirih (Piper betle L.) terhadap performans dan karkasitik bali betina, umur 22 minggu. Penelitian menggunakan rancangan acak lengkap dengan lima perlakuan yaituransum tanpa sekam padi (A), ransum mengandung 12,50% sekam padi (B), ransum mengandung 12,50 % sekampadi difermentasi EM-4 (C), ransum mengandung 12,50% sekam padi dan daun sirih (D), serta ransum 12,50%sekam padi difermentasi EM-4 dan daun sirih (E). Setiap perlakuan terdiri atas empat ulangan dan setiap ulanganberisi lima ekor ituik bali betina, Variabel yang diamati konsumsi ransum, konsumsi antioksidan ransum, bobotbadan akhir, pertambahan bobot badan, feed conversion ratio dan karkas meliputi bobot potong, bobot karkas danpersentase karkas. Hasil penelitian menunjukkan bahwa pemberian 12,50 % sekam padi difermentasi EM-4 sertadisuplementasi daun sirih tidak berpengaruh terhadap konsumsi ransum(P>0,05), namun dapat menghasilkanbobot badan akhir, pertambahan bobot badan lebih tinggi (P<0,05), serta FCR yang lebih rendah (P<0,05) sertabobot karkas dan persentase karkas yang lebih baik daripada perlakuan yang lainnya. Dapat disimpulkan bahwapemberian sekam padi yang difermentasi EM-4 serta disuplementasi daun sirih dapat memperbaiki performansdan karkas yang lebih baik daripada perlakuan yang lainnya.

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 Influence of Enzyme Supplementation in the Diets of Broiler Chickens Formulated with Different Corn Hybrids Dried at Various Temperatures

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 643
Author(s):  
Franciele C. N. Giacobbo ◽  
Cinthia Eyng ◽  
Ricardo V. Nunes ◽  
Cleison de Souza ◽  
Levy V. Teixeira ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Nutrient Digestibility ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Intestinal Morphology ◽  
Feed Conversion ◽  
Corn Hybrids ◽  
Positive Effects ◽  
Cecal Microbiota ◽  
Enzyme Supplementation

We evaluated the influence of enzymatic supplementation on the growth performance and cecal microbiota of broilers. A total of 2160 1-day-old male chicks were used in a 3 × 2 × 2 factorial arrangement (three corn hybrids, two drying temperatures −80 and 110 °C, with or without the inclusion of an enzymatic blend (amylase, xylanase, and protease) (20 birds/pen, n = 9). For all performance and digestibility parameters, we observed, in general, isolated effects of the corn hybrids and drying temperature. Birds that received the enzymatic blend in the diet showed better weight gain from 1 to 21 days (d) and better digestibility coefficients of nutrients at 42 d. Birds fed diets with corn dried at 80 °C showed a better feed conversion ratio from 1 to 42 d. At 21 d of age, enzymatic supplementation had positive effects on jejunum morphology. Enzyme supplementation increased the abundance of the phylum Tenericutes, class Bacilli and Mollicutes, reduced Clostridia, and increased the abundances of the families Lactobacillaceae, Anaeroplasmataceae, and O_RF39;F. In conclusion, the addition of amylase, xylanase, and protease led to a better nutrient digestibility, performance, and intestinal morphology. In addition, enzyme supplementation changed the diversity, composition, and predicted function of the cecal microbiota at d 21.

scholarly journals Assessment of the Effect of Remediation Strategies on the Environmental Quality of Aquaculture Ponds in Marilao and Meycauayan, Bulacan, Philippines

2018 ◽  
Vol 8 (20) ◽  
Author(s):  
John Vincent R. Pleto ◽  
Mark Dondi M. Arboleda ◽  
Jessica F. Simbahan ◽  
Veronica P. Migo
Keyword(s):  
Oxygen Demand ◽  
River System ◽  
The Philippines ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Culture Period ◽  
Vetiver Grass ◽  
Feed Conversion ◽  
Remediation Strategies ◽  
Aquaculture Ponds

Background. Water quality in the Marilao-Meycauayan-Obando river system (MMORS) of Bulacan, the Philippines, is of great concern due to the pollution load from local industries. The river system is currently used as a source of water for the aquaculture industry in Bulacan. Objectives. In order to address organic and heavy metal pollution, several remediation strategies were tested in aquaculture ponds along the river system. Strategies such as phytoremediation (vetiver grass pontoons), application of probiotics and zeolite (with filtration as pre-treatment) were utilized in ponds to decrease or remove toxic pollutants in water and sediments. Methods. Two sites were chosen as the pilot remediation sites – ponds in Barangay Nagbalon, Marilao and Barangay Liputan, Meycauayan, Bulacan. Pond bottom preparation was done to improve the condition of the pond bottom sediments before stocking by adding zeolite. Physicochemical parameters of water such as dissolved oxygen (DO), temperature, pH, salinity, ammonia, phosphate, biochemical oxygen demand (BOD) and chemical oxygen demand (COD) were monitored throughout the culture period. Heavy metals in sediments and fish were monitored. Fish parameters such as average body weight and feed conversion ratio were determined. Results. The DO levels were below recommended levels in the morning and reached a supersaturated level in the afternoon. Ammonia and COD levels were above recommended limits. A decreasing trend was observed for ammonia levels in treatment ponds. In terms of the growth of milkfish, the pond with probiotics showed the highest growth and better feed conversion ratio in Nagbalon and in the phytoremediation pond in Liputan. Percentage survival of milkfish was much higher at Liputan. Copper, chromium, lead and manganese were detected in pond sediments. After application of zeolite, there was a decrease in lead levels throughout the culture period. Conclusions. The different remediation studies were compared in terms of cost, effectivity and application and phytoremediation (vetiver grass pontoons) was determined to be the most cost-effective remediation strategy. Competing Interests. The authors declare no competing financial interests.

Effects of temperature and body weight on growth rate and feed conversion ratio in turbot (Scophthalmus maximus)

Aquaculture ◽  
2009 ◽  
Vol 295 (3-4) ◽  
pp. 218-225 ◽  
Author(s):  
Tómas Árnason ◽  
Björn Björnsson ◽  
Agnar Steinarsson ◽  
Matthías Oddgeirsson
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Scophthalmus Maximus ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Effects Of Temperature ◽  
Turbot Scophthalmus Maximus
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