scholarly journals Effect of size sorting on the survival, growth and cannibalism in pikeperch (Sander lucioperca L.) larvae during intensive culture in RAS

2011 ◽  
Vol 56 (No. 11) ◽  
pp. 483-489 ◽  
Author(s):  
M. Szczepkowski ◽  
Z. Zakęś ◽  
B. Szczepkowska ◽  
I. Piotrowska
Keyword(s):  
Body Weight ◽  
Specific Growth ◽  
Positive Impact ◽  
Intensive Culture ◽  
Size Sorting ◽  
The Difference ◽  
Specific Growth Rates ◽  
The Impact ◽  
Average Body ◽  
Average Body Weight

The aim of the experiment was to determine the impact of sorting on the growth, survival, and cannibalism of pikeperch larvae during intensive culture in recirculation systems. Larvae aged 48 days post-hatch (DPH) were reared in three groups – small specimens (group S – average body weight 40 mg), large specimens (group L – average body weight 76 mg), and unsorted ones (group U – average body weight 55 mg). After three weeks of rearing, there were no statistically significant differences in specific growth rates among the groups. However, increases in biomass were higher in the sorted groups. Survival exceeded 50% in the sorted groups and 39% in group U. Higher cannibalism was noted in group U than in the sorted groups. Significant differences among the sorted groups were observed in cannibalism, which was higher in group L, and in natural and manipulation losses, which were higher in group S (P < 0.05). During the first two weeks of rearing, the lowest cannibalism rates were observed in group S, the difference between groups S and U was statistically significant (P < 0.05). The results of the experiment indicate that the sorting of pikeperch larvae has a positive impact on the survival rate, however, it has no impact on growth during their rearing in the RAS.

scholarly journals ALKALINE PROTEASE, AMYLASE AND CELLULASE ACTIVITIES OF YELLOW RASBORA, Rasbora lateristriataBlkr., AT DIFFERENT FEEDING LEVELS

Molekul ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 190
Author(s):  
Untung Susilo ◽  
Purnama Sukardi ◽  
Ridwan Affandi
Keyword(s):  
Body Weight ◽  
Alkaline Protease ◽  
Fish Biomass ◽  
Alkaline Proteases ◽  
Protein Digestion ◽  
Feeding Level ◽  
Significant Difference ◽  
The Difference ◽  
Average Body ◽  
Average Body Weight

Alkaline proteases, amylase and cellulase activities of digestive organ of yellow rasbora, Rasbora lateristriata Blkr., was evaluated with four different feeding levels of 0.34g protein+0.03g fiber, 1.01g protein+0.10g fiber, 1.69g protein+0.16g fiber and 2.36g protein+0.23g fiber/day/100 g fish biomass. A total of 280 fish with average body weight of 0.71±0.06g were used in this study. The results showed that the difference in the feeding levels resulted in a significant difference in trypsin and chymotrypsin  activities (P <. 05), but not for amylase and cellulase activities (P > .05). In conclusion, protein digestion capacity increased, but not to the digestion of starch and fiber in response to different feeding levels and the optimal feeding level for yellow rasbora was 1,01g protein+0,10g fiber/day/100 g fish biomass.

scholarly journals MONOCHROMATIC LIGHTING IN THE POULTRY HOUSE

2019 ◽  
pp. 161-170
Author(s):  
I. V. Siianova
Keyword(s):  
Body Weight ◽  
White Light ◽  
Blood Parameters ◽  
Activity Level ◽  
Control Group ◽  
Growing Period ◽  
The Impact ◽  
Experimental Group ◽  
Average Body ◽  
Average Body Weight

The paper explores the impact of monochromatic illumination on replacement chickens of Decalb White cross-breed in the conditions of the Amur region. The chickens were grown from 1 day to 115 days age. The research was conducted in the conditions of the poultry farm “Belogorskaya”. The authors arranged four groups according to the principle of steam-analogues; each group contained 200 chickens and the experiment was carried out in the production unit. The researchers used luminous tube lamp with different colour temperatures for lighting. White lighting was used in the control group, yellow - in the first experimental group, green - in the second experimental group and blue - in the third experimental group. The researchers made blood test of chickens aged 30, 60 and 90 days for morphological and biochemical analysis. The authors carried out control weighing of the poultry at that time. At the end of the experiment, three pullets from each group were slaughtered in order to study the organs. The paper highlights morphological and biochemical blood parameters of replacement chickens at the white light had lower deviations from the physiological rate than at yellow, green and blue lamps. At the beginning of growing under yellow lamps, the concentration of gamma-globulin fraction of protein in the blood serum of chickens was higher than the age rate and the content of albumins was lower. Compared to the control group, the amount of bilirubin (P<0.05) and the activity level of asparagine aminotransferase (P<0.001) were higher under green and blue lamps. In the middle and at the end of the growing period, the number of leukocytes, creatinine, uric acid and asparagine aminotransferase may have increased in chickens under green and blue light. The difference among the results of blood tests of chickens grown under white light was, mostly reliable. When controlling the growth and development of replacement chickens aged 30 and 60 days the authors observed that the average body weight of chickens in white light was 1.5-3.9% higher than in the poultry of experimental groups. The average body weight of the chickens aged 90 days from all the groups was at the same level. The results of the control slaughter of pullets aged 115-days and grown under different lighting conditions were similar, and their sexual maturity was the same.

scholarly journals Pengaruh Sistem Resirkulasi Terhadap Kualitas Air, Kelulushidupan Benih Ikan Gurame (Osphronemus Goramy), Serta Kelayakan Usaha

PELAGICUS ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 23
Author(s):  
Fernando Jongguran Simanjuntak ◽  
Kukuh Nirmala ◽  
Ernik Yuliana
Keyword(s):  
Water Quality ◽  
Body Weight ◽  
Survival Rate ◽  
Specific Growth ◽  
Daily Growth ◽  
Growth Ratio ◽  
Recirculation System ◽  
Concrete Pond ◽  
Average Body ◽  
Average Body Weight

ABSTRAKSalah satu komoditas ikan air tawar yang menyumbang produksi perikanan terbesar adalah ikan gurame (Osphronemus goramy) yang mempunyai nilai ekonomis tinggi. Pembenihan ikan gurame adalah hal yang penting untuk menjaga keberlanjutan budidaya ikan gurame. Tujuan penelitian adalah menganalisis pengaruh sistem resirkulasi terhadap kualitas air, kelulushidupan benih ikan gurame, dan kelayakan usaha.  Pembenihan ikan gurame pada penelitian ini menggunakan tiga wadah budidaya, yaitu: 1) akuarium dengan sistem resirkulasi (Wadah I); 2) kolam beton sistem air mengalir (Wadah II);  kolam beton sistem pergantian air 30% secara berkala (Wadah III). Parameter yang diamati meliputi kualitas air dan angka kelulushidupan benih ikan gurame, serta kelayakan usahanya. Hasil penelitian menunjukkan bahwa pemeliharaan benih ikan gurame pada akuarium dengan sistem resirkulasi mempunyai kualitas air (suhu, oksigen terlarut, dan amoniak) yang terbaik, angka kelulushidupan (average daily growth, average body weight, specific growth ratio, survival rate) yang terbaik, dan membutuhkan modal terbesar pada investasi awal tetapi menghasilkan keuntungan yang lebih tinggi. Pembenihan ikan gurame dengan sistem resirkulasi direkomendasikan karena meningkatkan kualitas air, menghasilkan tingkat kelulushidupan yang tinggi dan menghasilkan keuntungan yang lebih tinggi.ABSTRACTOne of the freshwater fish commodities that contributes to the largest fisheries production is giant gourami (Osphronemus goramy) which has high economic value. Giant gourami hatchling is important to maintain the sustainability of its cultivation. This study aims to analyze the effect of recirculation system to water quality, survival rates, and feasibility of giant gourami hatchling business. Giant gourami hatchling in this study uses three cultivation containers, namely: 1) an aquarium with a recirculation system (Container I); 2) concrete pond with flowing water system (Container II); concrete pond with 30% water change system periodically (Container III). The parameters observed included water quality and survival rate of giant gourami hatchling, as well as the feasibility of their business. The results indicated that the giant gourami hatchling in an aquarium with a recirculation system had the best water quality (temperature, dissolved oxygen, and ammonia), had the best survival rate (average daily growth, average body weight, specific growth ratio, survival rate), and requires the largest amount of capital in the initial investment but yields more returns. Giant gouramy hatchery with a recirculation system is recommended due to improves water quality, results in a high survival rate and generates higher profits.

Evaluation of the impact of public investment programs on social and economic performance of territories

2019 ◽  
pp. 109-123
Author(s):  
I. E. Limonov ◽  
M. V. Nesena
Keyword(s):  
Bayesian Modeling ◽  
Positive Impact ◽  
Public Investment ◽  
Difference In Differences ◽  
The Public ◽  
Export Activity ◽  
Regional Investment ◽  
The Difference ◽  
The Impact ◽  
Development Institution

The purpose of this study is to evaluate the impact of public investment programs on the socio-economic development of territories. As a case, the federal target programs for the development of regions and investment programs of the financial development institution — Vnesheconombank, designed to solve the problems of regional development are considered. The impact of the public interventions were evaluated by the “difference in differences” method using Bayesian modeling. The results of the evaluation suggest the positive impact of federal target programs on the total factor productivity of regions and on innovation; and that regional investment programs of Vnesheconombank are improving the export activity. All of the investments considered are likely to have contributed to the reduction of unemployment, but their implementation has been accompanied by an increase in social inequality.

THE EFFECT OF (Morinda citrifolia L.) MEAL IN DIET ON PERFORMANCE OF BROILER

2012 ◽  
Vol 2 (1) ◽  
pp. 21-27
Author(s):  
Yosi Fenita
Keyword(s):  
Body Weight ◽  
Body Weight Gain ◽  
Morinda Citrifolia ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Randomized Design ◽  
Different Levels ◽  
Effect Of Feeding ◽  
Average Body ◽  
Average Body Weight

The objective of the research was to evaluate to effect of feeding mengkudu on performances of broilers. The research design used was completely randomized design. One hundred broilers were distributed into five treatments. The treatments were different levels of mengkudu meal (0, 0.75%, 1.5%, 2.25 % and 3%). The observed measured were feed consumption, average body weight (gain) and feed conversion. Results showed that feeding mengkudu (Morinda Citrifolia L.)  no effect significant (P>0.05) on feed consumption, average body weight and feed conversion.  In conclusion, feeding mengkudu meal up to 3% (in diet) does not negatively affect feed consumption, average body weight, and feed conversion.

scholarly journals The Effects of Feed Color on Broiler Performance between Day 1 and 21

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1511
Author(s):  
Joseph P. Gulizia ◽  
Kevin M. Downs
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Treatment Effects ◽  
Body Weight Gain ◽  
Experimental Period ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Broiler Performance ◽  
Average Body ◽  
Average Body Weight

Two trials were conducted to determine feed color effects on broiler performance. A completely randomized design was used. Trial 1 included four treatments: control (complete broiler starter diet), red, green, and blue; and Trial 2 included four treatments: control, orange, yellow, and purple. Each trial had 4 treatments with 4 replicates (60 birds/treatment) fed to 240 male Cobb 500 broilers during a 21 d grow out. Data were analyzed using the GLM procedure. In Trial 1, there were no treatment effects on average body weight, body weight gain, and feed consumption (p > 0.05). Adjusted feed conversion for control (1.23) was less than red (1.27; p = 0.001) and green (1.26; p = 0.009), with blue (1.25; p = 0.056) tending to be different during the experimental period. In Trial 2, there were no treatment effects on average body weight, feed consumption, and adjusted feed conversion during this study (p > 0.05). Body weight gain between d 1 to 14 for purple (490.78 g/bird) was more than orange (467 g/bird; p = 0.013) and yellow (461 g/bird; p= 0.004), with control (474 g/bird; p = 0.052) tending to be different. Results indicate that these feed colors had some, albeit limited, influence on broiler performance parameters.

Effects of turbidity on prey consumption and growth in brook trout and implications for bioenergetics modeling

2001 ◽  
Vol 58 (2) ◽  
pp. 386-393 ◽  
Author(s):  
John A Sweka ◽  
Kyle J Hartman
Keyword(s):  
Growth Rates ◽  
Brook Trout ◽  
Specific Growth ◽  
Abiotic Factors ◽  
Foraging Strategies ◽  
Turbid Water ◽  
Daily Consumption ◽  
Consumption Rates ◽  
The Difference ◽  
Specific Growth Rates

Brook trout (Salvelinus fontinalis) were held in an artificial stream to observe the influence of turbidity on mean daily consumption and specific growth rates. Treatment turbidity levels ranged from clear (<3.0 nephelometric turbidity units (NTU)) to very turbid water (> 40 NTU). Observed mean daily specific consumption rates were standardized to the mean weight of all brook trout tested. Turbidity had no significant effect on mean daily consumption, but specific growth rates decreased significantly as turbidity increased. Brook trout in turbid water became more active and switched foraging strategies from drift feeding to active searching. This switch was energetically costly and resulted in lower specific growth rates in turbid water as compared with clear water. Bioenergetics simulations were run to compare observed growth with that predicted by the model. Observed growth values fell below those predicted by the model and the difference increased as turbidity increased. Abiotic factors, such as turbidity, which bring about changes in the activity rates of fish, can have implications for the accuracy of predicted growth by bioenergetics models.

Early sex determination of Turkey by observation of differences in body weight between male and female

2021 ◽  
Vol 31 (3) ◽  
pp. 218-226
Author(s):  
S Akter ◽  
SC Das ◽  
AS Apu ◽  
T Ahmed ◽  
A Lahiry ◽  
...  
Keyword(s):  
Body Weight ◽  
Male And Female ◽  
Live Body Weight ◽  
Commercial Broiler ◽  
Percent Accuracy ◽  
Similar Body ◽  
Black Color ◽  
Average Body ◽  
Average Body Weight

The present study was conducted to determine the early sex in turkeys by observation of the differences in body weight between male and female birds. A total of 30-day old black color unsexed poults having almost similar body weight at hatching were considered for the experimentation and housed at the Poultry Farm of Bangladesh Agricultural University, Mymensingh-2202, Bangladesh. All birds were reared up to 12 weeks of age under intensive management with supplementation of commercial broiler starter and grower feeds. Birds were reared under similar management conditions. Significantly higher (p<0.01) body weight was attained in male poults (104g/bird) than the female (90g/bird) at the end of 1st week of age. Similarly, at the end of 2nd week of age higher (p<0.01) body weight attained by male poults (198.31g/bird) than the female (162.13g/bird). At the end of 3rd weeks of age male poults attained higher (p<0.01) body weight (307.23g/bird) than the female (251.33g/bird). After 4 weeks of rearing, male turkeys attained significantly higher (p<0.01) live body weight (424.46g/bird) than the female turkeys (347.87g/bird). The weekly average body weight gains of male and female birds were 94.18g/bird and 76.5g/bird, respectively. Thus, the male and female birds were successfully identified on the basis of differences in their body weight. Weekly feed intake for both the male and female birds was also increased with their age. Up to 4 weeks of age, both the male and female poults consumed same amount of feed (753.46g/bird). The FCR of male and female poults differed non-significantly in 1st, 3rd and 4th week. On the contrary, in 2nd week of age the FCR of male poults (1.60) was significantly lower (p<0.01) than female (2.11). Survivability was 100% up to 4th week of age irrespective of sex of the poults. The birds were reared up to 12 weeks of age until to confirm their sex by observation of the phenotypic appearance. Results of the phenotypic observation of male and female birds correspondence hundred percent accuracy with the results obtained in body weight based differences between male and female birds. It is therefore concluded that farmers can identify male or female poults as early as first week of age on the basis of body weight differences. Progressive Agriculture 31 (3): 218-226, 2020

scholarly journals Quantitative characteristics of the carcasses of Moxotó and Canindé goats fed diets with two different energy levels

2010 ◽  
Vol 39 (7) ◽  
pp. 1565-1570 ◽  
Author(s):  
Ana Cristina Chacon Lisboa ◽  
Dermeval Araújo Furtado ◽  
Ariosvaldo Nunes de Medeiros ◽  
Roberto Germano Costa ◽  
Rita de Cássia do Egypto Queiroga ◽  
...  
Keyword(s):  
Body Weight ◽  
Energy Level ◽  
Energy Levels ◽  
Experimental Period ◽  
Carcass Yield ◽  
Final Weight ◽  
Quantitative Characteristics ◽  
Energetic Level ◽  
Average Body ◽  
Average Body Weight

The objective of this work was to evaluate the quantitative characteristics of carcasses of Moxotó and Canindé goats finished in feedlots and fed diets of two levels of energy. It was used 40 castrated young goats, 20 from Moxotó breed and 20 from Canindé breed, each one with an average body weight of 15.2 kg. The animals were fed with diets containing 2.20 and 2.71 (Mcal/kg DM). The experimental period lasted 86 days. There was no difference among the barometric measures of Moxotó and Canindé kids. Canindé goats showed higher final weight, higher weight after fasting and higher hot and cold carcass weights when compared to the Moxotó animals. Animals that consumed diets with higher energy level had higher final weight and conformation as well as higher carcass yield. Considering the percentage values of the commercial meat cuts, no difference among treatments was observed. The diet was the factor that most influenced the non-constituent components of the carcass of Moxotó and Canindé goats. In general, animals belonging to the Canindé breed presented higher quantitative characteristics than the Moxotó breed. Supply of diets with higher energetic level (2.71 Mcal/kg DM) for goats from Moxotó and Canindé breeds, in feedlots, favors the production of carcass with higher yields and heavier commercial meat cuts.

scholarly journals INTERAKSI GENOTIPE DENGAN LINGKUNGAN, ADAPTABILITAS, DAN STABILITAS PENAMPILAN FENOTIPIK EMPAT VARIETAS UNGGUL IKAN NILA (Oreochromis niloticus)

2015 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Didik Ariyanto ◽  
Nunuk Listiyowati
Keyword(s):  
Body Weight ◽  
Oreochromis Niloticus ◽  
Crude Protein ◽  
Genetic Factor ◽  
Environment Factors ◽  
Pelleted Feed ◽  
Environment Factor ◽  
Net Cages ◽  
Average Body ◽  
Average Body Weight

Penampilan fenotipik suatu organisme ditentukan oleh faktor genetik dan dipengaruhi oleh faktor lingkungan tempat organisme tersebut hidup. Dalam beberapa kasus, interaksi antara faktor genetik dengan lingkungan juga berpengaruh terhadap penampilan fenotipik yang dihasilkan. Penelitian ini bertujuan untuk mempelajari interaksi antara faktor genetik dengan lingkungan, daya adaptabilitas dan stabilitas penampilan fenotipik khususnya bobot individu pada empat varietas unggul ikan nila yang dipelihara di tiga lokasi berbeda. Ikan nila varietas GMT, merah NIFI, NIRWANA dan BEST dipelihara di tambak payau di Indramayu, kolam air tenang di Sukamandi dan karamba jaring apung di Waduk Cirata, Kabupaten Cianjur, selama empat bulan pemeliharaan. Benih ikan nila diberi pakan pelet komersial dengan kandungan protein kasar 28%-30%, sebanyak 10%; 7,5%; 5%; dan 2,5% dari biomassa ikan masing-masing pada bulan pertama, kedua, ketiga, dan keempat. Pakan diberikan dengan frekuensi dua kali setiap hari. Hasil penelitian menunjukkan bahwa bobot ikan nila secara nyata dipengaruhi oleh faktor genetik, lingkungan, serta interaksi antara kedua faktor tersebut. Selain ikan nila GMT, tiga varietas ikan nila yang diuji mempunyai adaptabilitas lingkungan relatif sempit, serta stabilitas penampilan fenotipik karakter bobot individu relatif rendah. Hal ini mengindikasikan bahwa pengembangan budidaya ikan nila GMT dapat dilakukan di semua lokasi, sedangkan ikan nila merah NIFI, NIRWANA, dan BEST akan optimal jika dilakukan di lokasi tertentu saja.Phenotypic performance was determined by genetic and environment factors and their interaction. This study was conducted to examinethe present of interaction both of genetic and environment factors, adaptability, and stability of phenotypic performance of four varieties of tilapia which maintained in three different location. GMT, red NIFI, NIRWANA, and BEST tilapia strains were reared for four months in net cages in Cirata reservoir in Cianjur, in earthen ponds in Sukamandi and in brackish water ponds in Indramayu. All fish were fed with commercial pelleted feed contained of crude protein 28%-30%, about 10%, 7.5%, 5%, and 2.5% each day in 1st, 2nd, 3rd, and 4th month, respectively. The results showed that tilapia’s phenotipic performance especially the average body weight was significantly affected by genetic factor, environment factor, and interaction both of them factors. Except the GMT, all tilapia strains used in this study have narrow phenotypic adaptability and stability, especially in average body weight. This results indicated that GMT tilapia strain can be farmed in various areas, but red NIFI, NIRWANA, and BEST tilapia strains are most likely in a specific location.

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