Journal articles: 'Intensive rearing'

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Roo, Francisco Javier, Carmen María Hernández-Cruz, Juan Antonio Socorro, Hipólito Fernández-Palacios, and María Soledad Izquierdo. "Advances in rearing techniques ofPagrus pagrus,(Linnaeus, 1758): comparison between intensive and semi-intensive larval rearing systems." Aquaculture Research 41, no. 3 (February 2010): 433–49. http://dx.doi.org/10.1111/j.1365-2109.2009.02244.x.

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Rahayu H. S., I., S. Darwati, and A. Mu'iz. "Morfometrik Ayam Broiler dengan Pemeliharaan Intensif dan Akses Free Range di Daerah Tropis." Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan 7, no. 2 (July 1, 2019): 75–80. http://dx.doi.org/10.29244/jipthp.7.2.75-80.

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Broiler developed to produce meat in a fast manner. Generally, broiler reared by intensive system. Rearing system can be split into two kinds, intensive and free-range rearing system. The aim of this research was assessing the morphometric size of male and female broiler which are raised under intensive and free-range systems. Rearing systems was not have influence on the morphometric size of the chicken except in the length of the tibia, femur, and wing on the third week. Sex have real impact on the length of shank, tibia, wings, femur, and chest circumference, and also significantly affect the width and depth of the chest, neck, and spine lenght in fifth week. Rearing systems both intensive and free-range produced same frame size on broiler chicken.

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Kolkovski, Sagiv, John Curnow, and Justin King. "Intensive rearing system for fish larvae research." Aquacultural Engineering 31, no. 3-4 (October 2004): 295–308. http://dx.doi.org/10.1016/j.aquaeng.2004.05.004.

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Ghayas, A., J. Hussain, A. Mahmud, and M. H. Jaspal. "Evaluation of three fast- and slow-growing chicken strains reared in two production environments." South African Journal of Animal Science 50, no. 3 (August 27, 2020): 378–88. http://dx.doi.org/10.4314/sajas.v50i3.4.

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The present study evaluated performance, physiological response and economics of commercial fast growing (CFG), commercial slow growing (CSG), and Rhode Island Red (RIR) chickens under intensive and free-range rearing environments. After 21 days of rearing under the same intensive environment 240 birds from each strain were subjected to free-range and intensive rearing until they were 56 days old. Each treatment was replicated six times with 20 birds in each replicate. Body surface and cloacal temperatures, respiration and heart rates, feed intake, bodyweight and weight gain, feed conversion efficiency, growth efficiency, and liveability were recorded. Significant differences among strains were detected in physiological response and growth performance (except liveability). Rearing environment also caused significant differences in physiological parameters (except body surface temperature) and growth performance (except liveability). Significant interactions of the strains and production systems were detected. The CFG strain grew most rapidly under the intensive system with differences between strains being reduced in the free-range system. The RSG and CSG strains had similar respiration rates under the two production systems but differed significantly from each other. However, the CFG strain had a significantly elevated respiration rate in the free-range system. Total input cost of rearing CFG under the intensive system was highest ($3.54) among the treatments, whereas CSG under a free-range environment generated the highest profit ($0.37 per bird). In conclusion, rearing CSG under free range was the most economic farming strategy in today’s scenario.Keywords: economics, fast-growing, free range, growth, intensive system, physiology, slow-growing rural chickens

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Kuzniacka, Joanna, Marek Adamski, Rafal Czarnecki, and Miroslaw Banaszak. "Results of Rearing Broiler Chickens Under Various Systems." Journal of Agricultural Science 6, no. 4 (March 15, 2014): 19. http://dx.doi.org/10.5539/jas.v6n4p19.

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The aim of the study was comparison of the results of rearing broilers kept under intensive and semi-intensive systems, fed with complete feeds with an addition of various proportions of wheat grain. The study was carried out on 100 broilers, HUBBARD – FLEX, of both sexes. The birds were reared up to 42 days of age in an intensive system (group I), as well as in a semi-intensive system (group II). In the 5th week of rearing, in the nutrition of group II, 30% of complete feed was replaced with wheat grain, increasing its proportion in the dose up to 50% in the last week of rearing. System of keeping broilers did not affect significantly their bodyweight at the end of rearing, as well as their meat yield and muscle content in carcasses. Chicken fed with complete feeds, kept under an intensive system were distinguished by higher fattiness expressed as an abdominal fat weight, as well as by lower average intake of feed mixtures per individual broiler.

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Bogosavljević-Bosković, S., V. Kurćubić, M. Petrović, and V. Dosković. "The effects of season and rearing systems on meat quality traits." Czech Journal of Animal Science 51, No. 8 (December 5, 2011): 369–74. http://dx.doi.org/10.17221/3953-cjas.

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With the aim to examine the effect of season and rearing system on major broiler meat quality traits appropriate experimental investigations were conducted. Trial material included a total of 800 one-day-old broilers of the Hybro line hybrid. The experiment was organized in two replications, as trial I (conducted in the spring season) and trial II (conducted in the summer season). Two broiler fattening methods were employed, the intensive and semi-intensive one (using free-range rearing). The experimental chicks were slaughtered after seven weeks of fattening. Following the fattening period, 60 broilers (30 broilers from each experimental group) were chosen at random and slaughtered, with the aim of examining major broiler meat quality traits. At the slaughter line, determination of meat quantitative traits was done accompanied by sampling for chemical analyses. The rearing systems (intensive and semi-intensive system) affected significantly (P < 0.05) the proportion of class I meat in the broilers reared under the semi-intensive system, whereas in the class II and III meat proportions the rearing system did not exert any statistically significant effect (P > 0.05). The broilers reared under the semi-intensive system had a 1.44% higher proportion of muscular tissue on average than the intensively reared ones (P < 0.01). The bone and skin proportion was 0.82 and 0.67% lower in the broilers reared by the semi-intensive method (P < 0.05). The differences between the results of two trials organised at different seasons were not statistically significant (P > 0.05). The broilers reared semi-intensively had a statistically highly significantly higher protein proportion (P < 0.01) in breasts, drumsticks and thighs compared to the intensively reared broilers. The broilers reared in the summer season had higher breast and drumstick proportions (P < 0.01) as well as a higher thigh proportion (P < 0.05). The effect of both the season and the rearing system on the lipid content in the breasts, thighs and drumsticks was statistically highly significant (P < 0.01). The lipid content in the breasts, thighs and drumsticks was higher in the broilers during the summer season as well as in the intensively reared chicken. Finally, having thoroughly examined the research results, or more precisely, considering the established advantages in terms of the meat quality, the use of the free-range broiler rearing system can be deemed scientifically and professionally justifiable.

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Bogosavljevic-Boskovic, S., S. Mitrovic, V. Doskovic, S. Rakonjac, and V. Kurcubic. "Carcass composition and chemical characteristics of meat from broiler chickens reared under intensive and semiintensive systems." Biotehnologija u stocarstvu 27, no. 4 (2011): 1595–603. http://dx.doi.org/10.2298/bah1104595b.

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Poultry rearing systems have captured the attention of scientists for many years. A number of attempts have been made to introduce new technologies in rearing poultry for meat and egg production aiming at improving rearing conditions, protecting the environment and enhancing the quality of poultry products. Given the above, the objective of this study was to present the results of an evaluation of the effect of rearing system on major meat quality traits (percent yield of primal cuts in cold carcasses, tissue percentage in major primal cuts and chemical composition of muscle tissue). The experiment involved a total of 400 Hybro broilers reared under two different systems (intensive and semi-intensive systems). The fattening period and slaughter and dressing procedures were followed by measurement and meat sampling for chemical analysis. The results obtained show that broilers reared under the semi-intensive system had a somewhat higher percentage of drumsticks and breasts i.e. first class meat, as well as a higher percentage of breast and thigh muscles. Moreover, the protein content of breast, thigh and drumstick muscles was higher in broilers reared under semi-intensive conditions. As for the fat content of primal cuts, it was found to exhibit higher values in broilers reared under the intensive system. Overall, the results suggest better performance for most traits in free range broilers reared under semi-intensive conditions as compared to those reared intensively.

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Austin, B., and D. Allen-Austin. "Microbial quality of water in intensive fish rearing." Journal of Applied Bacteriology 59 (December 1985): 207S—226S. http://dx.doi.org/10.1111/j.1365-2672.1985.tb04901.x.

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Kolkovski, Sagiv, John Curnow, and Justin King. "Intensive rearing system for fish larvae research II." Aquacultural Engineering 31, no. 3-4 (October 2004): 309–17. http://dx.doi.org/10.1016/j.aquaeng.2004.05.005.

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Ramadhana, W. A., D. Sunarti, and T. A. Sarjana. "PRODUKSI KARKAS DAN PERSENTASE LEMAK ABDOMINAL ITIK TEGAL JANTAN DENGAN SISTEM PEMELIHARAAN INTENSIF DAN SEMI INTENSIF DI KTT BULUSARI PEMALANG." JURNAL ILMIAH PETERNAKAN TERPADU 7, no. 1 (May 20, 2019): 173. http://dx.doi.org/10.23960/jipt.v7i1.p173-179.

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The aims of this study was to determine the differences in intensive and semi-intensive rearing systems on body weight, carcass weight, percentage of abdominal fat, and relative income for producing carcasses of Male Tegal duck in KTT Bulusari, Pemalang. The study was conducted on April - May 2018, in Bulusari farmer group’s farm at Bulu Village, Petarukan, Pemalang District, and Central Java. The material used in this study was male Tegal ducks from 10 farmers at the Bulu Village with the object were in Petarukan Sub-district consisting of 5 semi-intensive and 5 intensive rearing systems. Tegal duck is maintained for 42 days. This research was a quantitative descriptive research that interprets a data from a research sample analyzed by the Mann-Whitney test. The results showed that male Tegal ducks that were kept intensively in Bulusari farmer group’s farm had higher body weight, carcass weight, percentage of abdominal fat and relative income than semi intensive reared duck (P < 0,05). The conclusion of this study was intensively reared ducks had higher carcass production and percentage of abdominal fat than semi intensively reared ducks. Keywords: Tegal Duck, Rearing System, Carcass Production, Percentage of Abdominal Fat, Relative Income

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Sihombing, Juli Mutiara, and Emmy Kejora. "The Effect of Different rearing Systems on Microscopic Quality of Fresh Semen in Thin Tail Sheep." International Journal of Research and Review 9, no. 2 (February 8, 2022): 94–97. http://dx.doi.org/10.52403/ijrr.20220213.

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The rearing system is one of the factors that determine livestock productivity. Good productivity can be influenced by the reproduction of livestock including male livestock, namely the quality of semen. Factors affecting the semen quality of thin-tailed sheep need to be considered, one of which is the livestock rearing system. This study aims to determine the microscopic quality of fresh semen of thin-tailed sheep raised with different rearing systems. The results showed that the best microscopic quality of fresh thin-tailed sheep semen was in intensive livestock rearing at parameters 80.31% motility, +++ mass movement, and 33.84x108 spermatozoa/ml concentration. Keywords: Microscopic Quality, rearing system, thin tail sheep.

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Yasmin, F., K. S. Haque ., and S. A. Chowdhury . "An Econometric Study on Semi-intensive Goat Rearing System." Pakistan Journal of Biological Sciences 6, no. 20 (October 1, 2003): 1729–32. http://dx.doi.org/10.3923/pjbs.2003.1729.1732.

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Kalesaran, Ockstan J. "PEMELIHARAAN POST LARVA (PL4-PL9) UDANG VANNAMEI (Penaeus vannamei) DI HATCHERY PT. BANGGAI SENTRAL SHRIMP PROVINSI SULAWESI TENGAH." JURNAL PERIKANAN DAN KELAUTAN TROPIS 6, no. 1 (April 30, 2010): 58. http://dx.doi.org/10.35800/jpkt.6.1.2010.121.

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White shrimp culture have been developed in some part of brackish water pond area in Indonesia, either in extensive, semi intensive or intensive technology and it resulted increasing on Indonesian shrimp culture production. At post larval stages, the pleopods become fully developed and functional. The animals grow very fast in terms of size and are able to swim freely although early post larvae are still planktonic. This research was done to know post larval rearing in Hatchery of PT. Banggai Sentral Shrimp. Preparation of basic facilities such as larval rearing tanks, water supply and aeration system is one of the most important activities in hatchery operation. Good water quality should be strictly maintained especially during this phase of larva rearing.

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Batkowska, Justyna, and Antoni Brodacki. "Selected quality traits of eggs and the productivity of newly created laying hen hybrids dedicated to an extensive rearing system." Archives Animal Breeding 60, no. 2 (April 28, 2017): 87–93. http://dx.doi.org/10.5194/aab-60-87-2017.

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Abstract. The aim of the study was to evaluate the usefulness of hybrids derived from Greenleg Partridge cocks and Rhode Island Red (GPR) hens for an extensive rearing system (RS), with special emphasis on high-quality table eggs. Newly created hybrids were compared to Hy-Line Brown (HLB) hens. The experiment was carried out with a total of 2400 hens. Both hybrid types (H's) were divided into two equal groups according to the rearing system: intensive (I) and extensive (E). The traits analysed in hens were body weight at the 8th, 16th, and 33rd weeks of age; laying production; and feed intake. At the 33rd week of a bird's age, egg quality was evaluated. The results of the study showed different reaction of the hybrids to the rearing system. This may confirm better usefulness of GPR for extensive farming and HLB hens for intensive methods of rearing. Furthermore, it can be concluded that the extensive system had a positive impact on the productivity of GPR birds.

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Ali, Md Yousuf, Nathu Ram Sarker, Md Ershaduzzaman, Razia Khatun, Shamim Ahmed, Md Ashadul Alam, Most Sumona Akter, Sirazum Munira, Shahidur Rahman, and US Alam. "Semi-intensive rearing of Turkey (Meleagris Gallopavo) in some selected areas of Bangladesh." Asian-Australasian Journal of Food Safety and Security 3, no. 1 (May 30, 2019): 48–52. http://dx.doi.org/10.3329/aajfss.v3i1.55927.

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There were 17 districts under Dhaka, Chottogram, Sylhet, Rajshahi, Khulna and Mymensingh divisions selected for this study on the basis of Turkey farming. The total 52 number of farmers interviewed to conduct this study. Turkey rearing is a profitable agricultural practice to meet the protein requirement in developing countries like Bangladesh. This is not only a source of protein but also a rich source of minerals and vitamins. The semi-intensive rearing of turkey requires low capital investment and labor cost. The main objectives of the study were to know the present status of feeding and rearing system, problems and prospects and benefit cost ratio of turkey rearing in Bangladesh. The information that collected from the respondents were age, education, main occupation, family members, training, annual income, number of turkey in each batch, name of strain, mortality rate, vaccination and medication practice, current situation of antibiotic and growth promoter use, use of footbath, use of disinfectant for spraying in inside and outside of the farm, percentage of antibiotic and feed additives withdrawal period before marketing, source of vaccine and medicine at farmer level, consultants of the farmers for vaccine and medicine specially antibiotic use, vaccination and medication cost in a batch. The average cost for production of one kg meat is BDT 231.177 and average market price of one kg meat was about BDT 452.34. Asian Australas. J. Food Saf. Secur. 2019, 3(1), 48-52

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Eda, Hiroki, Ryan Murashige, Yoshioki Oozeki, Atsushi Hagiwara, Bryan Eastham, Paul Bass, Clyde S. Tamaru, and Cheng-Sheng Lee. "Factors affecting intensive larval rearing of striped mullet, Mugil cephalus." Aquaculture 91, no. 3-4 (December 1990): 281–94. http://dx.doi.org/10.1016/0044-8486(90)90194-r.

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Karthik, D., J. Suresh, Y. Ravindra Reddy, G. R. K. Sharma, J. V. Ramana, G. Gangaraju, Y. Pradeep Kumar Reddy, D. Yasaswini, M. J. Adegbeye, and P. Ravi Kanth Reddy. "Farming systems in sheep rearing: Impact on growth and reproductive performance, nutrient digestibility, disease incidence and heat stress indices." PLOS ONE 16, no. 1 (January 13, 2021): e0244922. http://dx.doi.org/10.1371/journal.pone.0244922.

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The experiment was conducted with an intent to know the effect of different farming systems on the growth performance, nutrient digestibility coefficients, reproductive traits, disease incidence, heat stress indices, and cost economics of Nellore sheep. The study includes two parallel trials to prevent the influence of age on heat stress indices (panting score and erythrocyte osmotic fragility (EOF)). One hundred and twenty lambs (60 ram-lambs and 60 ewe-lambs) were allotted in a randomized block design under extensive, semi-intensive, and intensive systems for trial I, whereas trial II include eighteen rams assigned to the three respective farming systems in a completely randomised design. Both, season (summer) and grazing practice increased the panting score and EOF. The heat stress indices were positively correlated (P<0.01) with dry-bulb temperature and temperature-humidity index (THI) and inversely correlated (P<0.01) to relative humidity. Allotting the sheep to intensive system increased (P<0.001) weight gain and average daily gain with higher effect in males compared to females. The parameters of asymptotic weight (A), integration constant (B), and maturation rate were higher for intensive males. The male Nellore lambs had higher asymptotic weight and lower maturity rate than females, irrespective of the rearing system. Intensive sheep revealed a higher dry matter intake, digestibility coefficients, feed conversion ratio. The instantaneous bite mass (IBM) was higher for Commelina benghalensis, while instantaneous bite frequency (IBF), instantaneous intake rate (IIR) were higher for Cyanodon dactylon and amaranthus viridis, respectively. The proportion of intakes were highest for Stylo hemata followed by Cynodon dactylon and Tridax procumbens species. No differences were observed for the weight at puberty, oestrus cycle length, oestrus duration, conception percent, gestation period, and lambing percent in three rearing systems; however, the age at puberty was lower (P<0.001) and the birth weight was higher (P<0.001) for sheep reared under intensive farming system. Highest disease incidence was observed in rainy and winter seasons, particularly in sheep reared under extensive system. The capital expenditure was same for the three rearing systems, while the recurring expenditure was higher for Intensive farming system. The gross income and net income were higher for intensive system on account of higher weight gains. However, the higher returns per rupee of expenditure project the extensive farming as an ideal rearing system for small farmers and entrepreneurs with a low initial capital.

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Szczepkowski, M., Z. Zakęś, B. Szczepkowska, and I. Piotrowska. "Effect of size sorting on the survival, growth and cannibalism in pikeperch (Sander lucioperca L.) larvae during intensive culture in RAS." Czech Journal of Animal Science 56, No. 11 (November 22, 2011): 483–89. http://dx.doi.org/10.17221/3837-cjas.

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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.

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Tarricone, Simona, Anna Caputi Jambrenghi, Prospero Cagnetta, and Marco Ragni. "Wild and Farmed Sea Bass (Dicentrarchus Labrax): Comparison of Biometry Traits, Chemical and Fatty Acid Composition of Fillets." Fishes 7, no. 1 (February 11, 2022): 45. http://dx.doi.org/10.3390/fishes7010045.

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Sea bass is a fish widely produced, consumed and appreciated in Italy. Its intensive rearing system provides the consumption of valuable fish to a wider population. Thanks to the use of an appropriate feed, it is possible to obtain reared sea bass which are richer in total lipid with a majority presence of polyunsaturated fatty acids, such as n-3 and n-6 series. In this study, a total of 75 specimens of European sea bass coming from three different origins (two farmed and one wild) were considered, with 25 fish from each origin. Biometry traits were valued as of the chemical and fatty acid profile of fillets. Biometric indices, proximate composition and fatty acid percentage were significantly affected by the rearing system. Fishes from the intensive rearing system (IRS) showed the highest value of relative profile and condition factor, a higher content of lipid and total n-6 that influenced the n-6/n-3 ratio and the atherogenic indexes, and values that indicated their flesh for human consumption as a healthy alternative to the wild fishes.

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Sari, Dinda Ayu Permata, S. Said, Nahrowi Nahrowi, R. Priyanto, and Muladno Muladno. "Effect of Body Condition Score on Reproductive Performance and Chest Girth of Bali cows in Different Rearing Systems." Jurnal Ilmu Ternak dan Veteriner 26, no. 4 (January 21, 2022): 158. http://dx.doi.org/10.14334/jitv.v26i4.2886.

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Nutrition and rearing systems are some of the main factors affecting productivity of cows. Body condition score (BCS) is a method used to assess nutritional status and evaluate rearing systems of each animal. This study was done to analyze effect of BCS on reproductive performance and chest girth of Bali cow in different rearing systems. This study was conducted at the Field Station of Sekolah Peternakan Rakyat Kuamang Abadi, Bungo Regency, Jambi, Indonesia. A total of 62 heads of Bali cow with BCS of 2, 3, and 4 (scale 1-5) reared on intensive, semi-intensive and extensive systems were used in this study. This study was conducted using survey and direct observation. Variables observed were as follows: BCS, calving interval (CI), days open (DO), service per conception (S/C) and chest girth (CG). Data were analyzed using simple correlation and regression analysis in SPPS, followed by descriptive analysis. Result showed that the BCS of Bali cow in different rearing systems did not affect CI, DO, S/C and CG. BCS had a weak correlation coefficient (r), with the reproductive performance of CI, DO, and S/C at 0.09, 0.09, and 0.08, respectively. In addition, the relationship between BCS and CG was highly significant, with a correlation coefficient (r) of 0.532. Therefore, BCS had a positive relationship with CI, DO, S/C, and CG. Moreover, BCS cannot be used as the only indicator to assess the reproductive performance of Bali cow in different rearing systems.

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Ismoyowati, E. Tugiyanti, and D. Indrasanti. "Hematological parameters and antibody titers to new castle diseases and avian influenza on extensive and semi-intensive system." IOP Conference Series: Earth and Environmental Science 902, no. 1 (November 1, 2021): 012024. http://dx.doi.org/10.1088/1755-1315/902/1/012024.

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Abstract The study evaluated the hematological parameters and antibody titers against Newcastle Disease (ND) and Avian Influenza (AI) on native chickens under extensive and semi-intensive rearing in Central Java, Indonesia. The target of the study was native chickens in Banyumas and Kebumen areas. The chickens were reared extensive and semi-intensively. The survey method was carried out by drawing 324 chicken blood samples for hematological tests and measuring antibody titer to ND and AI. The data obtained were analyzed using a general linear model (GLM) with the Systat ver.13 program. The results showed that native chicken in extensive and semi-intensive systems had different physiological statuses (P<0.05). The number of erythrocytes, hemoglobin levels, hematocrit values, total plasma protein levels, and heterophil-lymphocyte ratios was higher on semi-intensive than extensive system. However, the number of leucocytes was relatively high the same (P>0.05). In extensive system rearing, the number of native chickens with effective antibody titers against ND and AI was higher than the semi-intensive. The study concluded that native chickens reared in semi-intensive systems had a healthier physiological status than chickens in extensive systems. However, the effective antibody titers against ND and AI in the extensive and semi-intensive systems were still very low.

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Sulistyoningsih, M., Dwi Sunarti, Ejeng Suprijatna, and I. Isroli. "Performance of indigenous chicken under intensive rearing with various litter materials." International Journal of Science and Engineering 4, no. 2 (April 15, 2013): 52–56. http://dx.doi.org/10.12777/ijse.4.2.2013.52-56.

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Sulistyoningsih, M., Dwi Sunarti, Ejeng Suprijatna, and I. Isroli. "Performance of indigenous chicken under intensive rearing with various litter materials." International Journal of Science and Engineering 4, no. 2 (April 15, 2013): 52–66. http://dx.doi.org/10.12777/ijse.4.2.2013.52-66.

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Abrosimova, N. A. "THE IMPORTANCE OF ANTIBACTERIAL PREPARATIONS FOR INTENSIVE REARING OF STURGEON FRY." Journal of Applied Ichthyology 15, no. 4-5 (September 1999): 335. http://dx.doi.org/10.1111/j.1439-0426.1999.tb00355.x.

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Skjermo, Jorunn, and Olav Vadstein. "Techniques for microbial control in the intensive rearing of marine larvae." Aquaculture 177, no. 1-4 (July 1999): 333–43. http://dx.doi.org/10.1016/s0044-8486(99)00096-4.

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Zakes, Zdzislaw, and Krystyna Demska‐Zakes. "Intensive rearing of juvenileStizostedion lucioperca(Percidae) fed natural and artificial diets." Italian Journal of Zoology 65, sup1 (January 1998): 507–9. http://dx.doi.org/10.1080/11250009809386875.

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Mahmud, A., A. Husnain, S. Mehmood, K. Javed, M. Khan, and S. Ahmad. "PSIX-5 Behavioral Repertoire of Commercial Layers Under Free Range, Semi-Intensive and Intensive Rearing Systems." Journal of Animal Science 96, suppl_3 (December 2018): 16–17. http://dx.doi.org/10.1093/jas/sky404.037.

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van Huis, A., D. G. A. B. Oonincx, S. Rojo, and J. K. Tomberlin. "Insects as feed: house fly or black soldier fly?" Journal of Insects as Food and Feed 6, no. 3 (June 9, 2020): 221–29. http://dx.doi.org/10.3920/jiff2020.x003.

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Industrialised rearing of house flies and black soldier flies in systems for producing protein offers numerous species-specific benefits and challenges. These two dipteran species offer great potential for mass production of protein rich feed ingredients on a global scale. Through this systematic review, various facets of intensive production of these species are evaluated according to criteria, such as development time, abiotic tolerance, ease of rearing, environmental impact, safety risks, range of possible organic side streams, and their role in bioconversion.

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Spurný, P., J. Fiala, and J. Mareš. "Intensive rearing of the nase Chondrostoma nasus (L.) larvae using dry starter feeds and natural diet under controlled conditions." Czech Journal of Animal Science 49, No. 10 (December 13, 2011): 444–49. http://dx.doi.org/10.17221/4330-cjas.

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We performed intensive rearing of larvae of the nase Chondrostoma nasus (L.) in a feeding experiment until 21 days from the initiation of exogenous nutrition under laboratory conditions at a temperature 26°C. Two dry starter feeds (a feed for salmonids and a starter feed of the artiﬁcialplanktontype)diﬀeringinthecompositionof nutrients (50% and 60% of proteins, 12% and 16% of fat, respectively) and natural food (Artemia salina nauplii) were used. Cumulative survival rate, individual weight (w), total length (TL), speciﬁcweightgrowthrate(SWGR),speciﬁclengthgrowthrate(SLGR)andconditionfactor(CF)wereassessed.One-wayanalysisofvariance(ANOVA)was used for statistical processing of data. High survival rate 99.3% and the highest (P < 0.01) growth rate of nase larvae (TL = 22.0 mm, w = 69.2 mg) were found when feeding the natural food. The application of dry feed of the artiﬁcialplanktontyperesultedinhighersurvival(98.8%)andsigniﬁcantlyhigher(P < 0.01) growth of both length and weight (TL = 17.5 mm, w = 42.5 mg) compared to the nase fed with dry feed for salmonids (survival rate 77.3%, TL = 15.9 mm, w = 24.5 mm). In the course of the experiment the value of Fulton’s coeﬃcientincreasedfrominitial0.57 to 0.79 in ﬁshfedwithartiﬁcialplanktonto0.65inﬁshfedwithnaturalfoodandto 0.61if dryfeedforsalmo-nids was used. We conclude that with an appropriate starter feed the successful intensive rearing of larval nase can be carried out under controlled conditions.

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Solimano, Patricio J., Javier R. Garcia de Souza, Tomás Maiztegui, Claudio R. M. Baigún, and Darío C. Colautti. "New approaches for growth improvement in pejerrey Odontesthes bonariensis (Valenciennes, 1835) culture (Atherinomorpha: Atherinopsidae)." Neotropical Ichthyology 13, no. 1 (March 24, 2015): 213–20. http://dx.doi.org/10.1590/1982-0224-20140078.

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The pejerrey is the most important recreational species in shallow temperate lakes and reservoirs of Argentina and the attempts to develop its culture have started a century ago. A common constraint of pejerrey aquaculture is its poor growth under traditional intensive rearing techniques. The aim of this study was to evaluate the possibility to achieve and maintain high growth rates of pejerrey throughout the rearing process by semi-intensive culture method . Four floating cages were installed in La Salada de Monasterio Lake and each one was stocked with 300 juveniles (10.22 ±0.38cm; 6.52 ±0.82g). From January through March all fish were exposed to natural zooplankton as food source, whereas from April to September two cages were supplied daily with artificial food. The fish exposed to artificial supplementary diets exhibited significantly higher growth (17.5 ±0.98cm; 41.05 ±8.55g) than those in the control cages (15.02 ±0cm ; 23.5 ±0.84g), and exceeded the known values in pejerrey culture. The results suggest that the species potential growth is not fully achieved by common intensive methods and it can be improved by semi-intensive techniques. Accordingly a better understanding of the species nutritional requirements is needed to improve growth rates and enhance pejerrey culture.

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Relic, Renata, and Jovan Bojkovski. "Housing conditions in calves welfare risk assessment." Journal of Agricultural Sciences, Belgrade 55, no. 3 (2010): 283–92. http://dx.doi.org/10.2298/jas1003283r.

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This paper shows results of calf welfare risk assessment at intensive breeding farms. Assessment has been conducted on the basis of housing conditions which can have negative influence on welfare of cattle, especially in calf category considering their needs. According to analysis results very good housing conditions were confirmed in open shed rearing stall (C) and closed type rearing stall without feeding yard (A), whilst in closed rearing stall with feeding yard (B) housing conditions were estimated as acceptable. Based on collected data about housing conditions, we have estimated that the least risk for calf welfare is at C farm, slightly higher at A farm and the highest at B farm. Data about housing conditions and analysis of potential welfare risk factors show possible causes for already present health and other problems with animals, which also can reappear in future. However for that reason, applying described methods can increase rearing conditions and increase production at cattle farms.

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Sivak, Elizaveta. "Managing Grandparental Involvement in Child-Rearing in the Context of Intensive Parenting." Sociological Research Online 23, no. 4 (July 11, 2018): 830–46. http://dx.doi.org/10.1177/1360780418787201.

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Intensive parenting ideology is on the rise in expert discourses, social policy, and popular culture. A growing body of research focuses on how mothers try to satisfy the requirements of intensive parenting in their child-rearing practices. However, little is known about the broader effects of this culture, including the implications for intergenerational relationships. In this article, we investigate how mothers manage the pressures of intensive parenting and at the same time maintain relationships with the child’s grandparents. We use data from 50 interviews with mothers of pre-schoolers, living in Russia. We show that in the context of parental determinism and the expert-oriented parenting culture, mothers may construe grandparents’ practices and beliefs as wrong and harmful for the child, and they experience grandparents’ involvement as a source of anxiety. We also unpack the strategies that mothers use to micro-manage grandparental involvement and cope with anxiety, which are as follows: (a) restrictions of grandparental involvement, (b) negotiations over child-rearing practices and ideas, and (c) constructions of therapeutic narratives to re-describe involvement to render it acceptable. This study contributes to the debates on intensive parenting by demonstrating its isolating potential and showing how mothers try to overcome it.

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Khatun, R., MN Islam, MA Rashid, and S. Ahmed. "Rabbit production under intensive system in rural condition." Bangladesh Journal of Livestock Research 19, no. 1-2 (January 21, 2016): 107–11. http://dx.doi.org/10.3329/bjlr.v19i1-2.26432.

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A total 20 (sixteen female and four male) growing rabbits aged 120 days have been distributed at each farmers level in 5 location of Bangladesh; F1 (Dhaka-Pollobi), F2 (Savar-Parbotinagor), F3 (Magura-Boralidhaho), F4 (Magura-Pannandualli), F5 (Magura-Radhanagor) to know the production response and cost effectiveness under intensive in rural condition. The rabbits were reared in their own arrangement. Age of sexual maturity, age of first kidding, percentage of does kidded, gestation period, litter size, weaning period, breeding ratio were not significantly different (P>0.05) among the locations. Feed cost per month was Tk. 903, Tk. 732, Tk. 772, Tk. 1221.96 and Tk. 976 for F1, F2, F3, F4 and F5 respectively for 20 rabbits rearing. Monthly consumption of rabbit meat per family was 4.5kg, 3kg, 2.4 kg, 6.0 kg, in F1, F2, F3, and F5 respectively. Kid mortality (0-10 days) was significantly different (P<0.01) among the locations and this value was recorded 8.47%, 11.11%,12.00%, 8.82% and 13.11% in F1, F2, F3, F4 and F5 respectively. Farmer earned some money by selling their rabbit which was Tk 10200, Tk7600, Tk8400, Tk12400 and Tk7200 /batch and can earn profit around the 49,564; 39,316; 38,536; 62,336 and 35,688 Tk/year in rearing (7batchs/year) 20 rabbit at in F1, F2, F3, F4 and F5, respectively. Rabbit production could be an important micro-livestock component to produce for meeting up extra demand of the country.Bangladesh J. of Livestock Res. 19(1-2): 107-111, Jan-Dec 2012

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Buřič, M., J. Bláhovec, and J. Kouřil. "Feasibility of rearing brook char fingerlings in an intensive recirculating hatchery as a complementary species to rainbow trout." Czech Journal of Animal Science 61, No. 1 (July 15, 2016): 8–14. http://dx.doi.org/10.17221/8663-cjas.

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Papandroulakis, Nikos, George Markakis, Pascal Divanach, and Maroudio Kentouri. "Feeding requirements of sea bream (Sparus aurata) larvae under intensive rearing conditions." Aquacultural Engineering 21, no. 4 (March 2000): 285–99. http://dx.doi.org/10.1016/s0144-8609(99)00036-9.

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Neupane, D., M. Karki, and S. B. Shrestha. "Intensive Management of New Hampshire and Giriraja Chickens for Generating Premium Cash Income." Nepal Journal of Science and Technology 15, no. 2 (February 15, 2015): 23–28. http://dx.doi.org/10.3126/njst.v15i2.12109.

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Comparative performance of New Hampshire and Giriraja breeds of chicken was studied at Swine and Avian Research Program, Khumaltar. The data on feed intake, weight gain and mortality of the chicks were recorded up to 12 weeks of age. All the experimental birds were reared with commercial broilers feed (Pancha Ratna feed) under similar management. Significant (<0.01) effect of breed on body weight was observed with Giriraja showing superior to New Hampshire. Effect of sex on body weight was also found significant (P<0.01). At twelve-week of age, higher body weight was observed for Giriraja male (2082 g) followed by Giriraja female (1655 g), New Hampshire male (1338 g) and New Hampshire female (1051 g) with cumulative FCR of 3.40,3.78,3.87 and 3.90 respectively. Irrespective of sex, Giriraja exhibited better FCR than New Hampshire at all weeks of rearing. The cumulative mortality was found as 6.21% and 12.25% for New Hampshire and Giriraja respectively. Up to 12 weeks of rearing, higher saving per bird was observed in Giriraja (Rs132.39) than that of New Hampshire (Rs 67.09). The findings of this study revealed that these dual-purpose breeds have potentiality to be competitive meat producers in intensive management. Giriraja is better than New Hampshire in terms of higher growth, better feed efficiency and saving per birds but need for proper health management particularly in the early growth stage. Looking at the havier body weight with having better feed efficiency and higher saving per bird of 12 week rearing, Giriraja could be the choice of economical viable intensive farming for generating premium cash income whereas New Hampshire appears to be suitable for scavenging and semi- scavenging management.DOI: http://dx.doi.org/njst.v15i2.12109Nepal Journal of Science and Technology Vol. 15, No.2 (2014) 23-28

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Hung, Yi-Ting, Chin-Cheng Scotty Yang, Pavel Saska, and Shu-Jen Tuan. "Comparison of Artificial Diets and Natural Prey for Mass Rearing of Orius strigicollis (Hemiptera: Anthocoridae) Using Demographic Characteristics to Optimize Cost-Efficiency." Journal of Economic Entomology 114, no. 4 (June 16, 2021): 1523–32. http://dx.doi.org/10.1093/jee/toab112.

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Abstract Orius strigicollis (Poppius) has been commonly released to control minute pests due to its remarkable foraging and predation ability. Despite decades long history of mass-rearing using eggs of Cadra cautella Walker (Lepidoptera: Pyralidae) as food, the cost of this food impeded the predator’s marketing potential. Finding cost-effective artificial diets for mass rearing programs is, therefore, the key to promote the use of this generalist predator in practice. The aim of this study was to explore suitability of alternative diets for mass rearing of this predator, using the age-stage, two-sex life table. Eight recipes of artificial diets were initially screened, and the candidate diets were subsequently evaluated using the population parameters of O. strigicollis. The highest intrinsic rate of increase was found in the O. strigicollis fed on the meridic combined Diet 1, where nymphs and adults were fed different diets. However, the intensive period of oviposition by females reared on oligidic Diet O3 contributed to the shorter rearing period (42 d) and lower rearing cost than that on combined Diet 1 (60 d). Besides, with the harvest rate of 0.919, the minimal population size of 10,774 individuals with a stable age-stage distribution was needed for daily harvesting 1,000 third instars of O. strigicollis reared on Diet O3 at the rearing cost of 0.295 NTD (new Taiwanese dollar) per nymph. Thus, Diet O3 was determined to be the most cost-effective recipe for the mass-rearing of O. strigicollis among those used in this study.

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Aaronson, Daniel, Fabian Lange, and Bhashkar Mazumder. "Fertility Transitions Along the Extensive and Intensive Margins." American Economic Review 104, no. 11 (November 1, 2014): 3701–24. http://dx.doi.org/10.1257/aer.104.11.3701.

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By allowing for an extensive margin in the standard quantity-quality model, we generate new insights into fertility transitions. We test the model on Southern black women affected by a large-scale school construction program. Consistent with our model, women facing improved schooling opportunities for their children were more likely to have at least one child but chose to have smaller families overall. By contrast, women who themselves obtained more schooling due to the program delayed childbearing along both the extensive and intensive margins and entered higher quality occupations, consistent with education raising opportunity costs of child rearing. (JEL I20, J13, J15, J16, J24)

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Saha, Tapu Kumar, Ferdousi Begum, SM Lutful Kabir, Md Shafiqul Islam, and Md Shahidur Rahman Khan. "Characterization of bacterial isolates from skin lesions of sheep, goat and cattle in different rearing condition." Asian Journal of Medical and Biological Research 5, no. 2 (August 4, 2019): 117–25. http://dx.doi.org/10.3329/ajmbr.v5i2.42493.

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The study was performed to isolate and characterize some selected bacteria from skin lesion of sheep, goat and cattle of different rearing condition. Intensive and semi-intensive housing systems were considered for this study. A total of (n=60) skin wound swab and pus samples were collected for this study during the study period. Among them (n=30) samples were collected from intensive farms and (n=30) samples were collected from semi-intensive farms. Staphylococcus aureus infections were found 70% skin lesion for sheep, 30% for goat and 60% for cattle and Pseudomonas aeruginosa infections were found 5% skin lesion for sheep, 15% for goat and 15% for cattle. Semi-intensive farm animals were more infected by bacteria than intensive farm animals. Staphylococcus aureus affected 53.33% in intensive farm animal and 66.67% in semi-intensive farm animal. Pseudomonas aeruginosa affected 10% animal in intensive housing system and 13.33% in semi-intensive housing system. The organisms were isolated and characterized by morphological, cultural and biochemical characteristics and identified by polymerase chain reaction. Staphylococcus aureus produced yellowish colony in nutrient agar and golden yellow colony in mannitol salt agar. Positive isolates were produced β–hemolysis in blood agar. Pseudomonas aeruginosa produced characteristic colony in nutrient agar but not produce pigment. Pseudomonas aeruginosa produced colorless colony in MaCconkey agar, violet colony in EMB agar and produced hemolysis in blood agar. Staphylococcus aureus showed Gram positive, cocci shaped and grapes like arrangement and Pseudomonas aeruginosa showed Gram negative, short rod shaped. Staphylococcus aureus fermented five basic sugars and produced gas and Pseudomonas aeruginosa fermented dextrose and mannitol. Both organisms were catalase positive, only Pseudomonas aeruginosa was oxidase positive. Pseudomonas aeruginosa isolates were further characterized by PCR amplification of toxA gene primer. Staphylococcus aureus skin infection treatment was noticed more effective by erythromycin and gentamicin and Pseudomonas aeruginosa skin infection treatment more effective by ciprofloxacin and gentamicin. Both the organisms were found to be amoxicillin resistant. This is the first and preliminary report of molecular characterization of Pseudomonas aeruginosa from skin lesion of sheep, goat and cattle associated with a different rearing condition of the animals in Bangladesh. Asian J. Med. Biol. Res. June 2019, 5(2): 117-125

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Tuzov, Ivan, Nikolay Zabashta, Elena Kuleshova, Valentin Golovan, and Irina Sinelshchikova. "Comparative characteristics of meat productivity of holstein and black-and-white breeds." E3S Web of Conferences 273 (2021): 02018. http://dx.doi.org/10.1051/e3sconf/202127302018.

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It was assumed that the industry of beef cattle breeding being created in the Krasnodar Territory would meet the needs of the population in beef. Due to the fact that there are not enough beef cattle, dairy bulls are raised and fattened. Positive results are obtained in the case when, along with an increase in the number of the fattened livestock of animals, their intensive rearing and feeding is introduced. In our studies, with intensive rearing and fattening of the Holstein and Black-and-White bull calves, for the entire 14-month period of growing and fattening, average daily gains were obtained at the level of 1200 g, and the gross weight gain was more than 500 kg. According to the results of the slaughter of experimental bulls at the age of 14 months, we found that the Holstein bulls reliably exceeded the black-and-white bulls of the same age in all the studied parameters.

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Chanda, RC, M. Moniruzzaman, Md Hasanur Alam, Asma Khatun, Md Nuronnabi Islam, Md Enayet Kabir, Md Ahidul Islam, and Md Ruhul Amin. "Buffalo production in small scale and commercial farms in Bangladesh." Asian Journal of Medical and Biological Research 7, no. 4 (December 30, 2021): 323–31. http://dx.doi.org/10.3329/ajmbr.v7i4.57612.

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The present study was aimed to compare the production status and management practices of crossbred buffaloes between small scale and commercial farms in Bangladesh. The data were collected through personal interview from the individual respondent. The study revealed that duration of buffalo rearing was mostly practiced for more than two years. Various types of feed ingredients including rice straw, wheat straw, green grass, concentrate feed, cultivated fodder, tree leaves and unconventional feed resources were used for feeding buffaloes. In small scale, 83.34% farmers fed their buffalo in a group and 75% buffaloes reared under semi-intensive system while all buffaloes practiced individual feeding and reared under intensive system in commercial farms. The daily milk production, lactation length and yield of dam and birth weight of calves significantly (p<0.05) increased in commercial farm than small scale. However, the weaning age and weight was significantly (p<0.05) higher in village buffaloes than commercial farms. Similarly, age at 1st heat, 1st calving, services per conception and postpartum heat showed significantly (p<0.05) higher values in village than commercial farms. The major diseases of buffaloes in those areas were foot and mouth disease, black quarter, hemorrhagic septicemia, mastitis and anthrax. A proportion of 88.3% village farmers performed vaccination, in contrast, all buffaloes were vaccinated in commercial farms. The cost-return analysis discovered that rearing of buffalo in commercial farms was more profitable than rearing in small scale. Finally, the results revealed that productive and reproductive performances of buffaloes were better in commercial farms than small scale condition. Buffalo rearing is more profitable in commercial farms than small scale farming. Asian J. Med. Biol. Res. 2021, 7 (4), 323-331

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Budiardi, T., R. D. Salleng, and N. B. P. Utomo. "Nursery of Penaeus monodon fry in Cage Culture of Intensive Pond at Different Rearing Densities." Jurnal Akuakultur Indonesia 4, no. 2 (July 1, 2007): 153. http://dx.doi.org/10.19027/jai.4.153-158.

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Black tiger shrimp (Penaeus monodon Fab.) culture is now frequently failed as the fault in pond construction and irrigation system, disease break, and younger fry is stocking into pond. Nursery is a rearing of PL12 to be PL25 at a controlled environmental condition to quickly adapt them on pond condition. Nursery experiment was conducted in cage culture (1x1x1 m) placed in an intensive pond at density of 250, 500, 750 and 1000 PL/m2, for 14 days rearing. The results of study indicated that no different in survival and growth of PL was obtained. Daily growth rate was ranged from 1.10% to 1.53%, while the survival rate was ranged from 86.72-95.60%. Higher production of shrimp fry (867 PL25) was obtained by rearing PL12 at density of 1000 PL/m2. Keywords: black tiger shrimp, Penaeus monodon, fry, rearing density ABSTRAK Usaha udang windu (Penaeus monodon Fab.) saat ini banyak mengalami kegagalan akibat konstruksi tambak dan sistem pengairan yang salah, serangan penyakit, dan umur benih yang terlalu muda untuk pemeliharaan ditambak. Penokolan merupakan pemeliharaan benur pada stadia PL12 menjadi PL25 dalam lingkungan yang relatif terkontrol agar dapat beradaptasi dengan cepat pada lingkungan tambak. Percobaan penokolan dilakukan menggunakan hapa (1x1x1 m) yang dipasang di dalam kolam intensif dengan padat tebar 250, 500, 750 dan 1000 ekor PL/m2, selama 14 hari pemeliharaan. Hasil penelitian menunjukkan bahwa tidak ada perbedaan nyata dalam hal kelangsungan hidup dan pertumbuhannya. Laju pertumbuhan harian udang berkisar antara 1,10% sampai 1,53%, sementara tingkat kelangsungan hidup berkisar 86,72-95,60%. Produksi benih udang (867 PL25) terbanyak diperoleh dengan memelihara PL12 pada kepadatan 1000 ekor PL/m2. Kata kunci: udang windu, Penaeus monodon, tokolan, kepadatan tebar

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Petrovic, M. P., D. Ruzic-Muslic, and N. Maksimovic. "Evaluation of genetic potential of sheep in different production systems." Biotehnologija u stocarstvu 25, no. 5-6-1 (2009): 421–29. http://dx.doi.org/10.2298/bah0906421p.

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Evaluation of phenotypic value of most present sheep breeds in Serbia is carried out as well as those populations which should have greater significance in the future. In this way, clear picture was obtained of strength and potentials of sheep production in different rearing systems, which will serve better defining of the direction of genetic-selection activities in the future. Researches have shown that there is high variability of traits depending on the observed factors. It is indicative that in the intensive system sheep breeds are forces of production direction meat and meat-wool, whereas in semi-intensive and extensive systems, predominant are breeds of tripartite direction. The best results in intensive rearing system were obtained in Mis sheep. In semi-intensive system, there is huge difference in body mass between Pirot improved sheep and Tsigai sheep, as well as between all investigated breeds in this system in regard to milk traits. Tsigai lambs realized higher body mass at the age of 90 days. Lipska sheep was dominant in regard to quantity of milk in lactation, but its fertility was the lowest. Mass of fleece was the lowest in sheep of Pirot improved population. There were no significant differences in regard to variability of the quantitative traits between sheep in extensive system, except in final body mass of lambs, where Svrljig and Pirot population were behind in comparison to Sjenica sheep.

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Cahyanurani, Annisa Bias, and Mochammad Heri Edy. "Performance of intensive vannamei (Litopenaeus vannamei) culture at low salinity." Depik 11, no. 3 (October 1, 2022): 257–64. http://dx.doi.org/10.13170/depik.11.3.25565.

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Intensive aquaculture systems that are not managed properly often cause problems that disrupt the balance of the environment so that shrimp are susceptible to disease. One of the aquaculture innovations that have been developed to minimize disease impact is shrimp farming with low salinity. This study aims to determine the performance of intensive Litopenaeus vannamei shrimp culture with low salinity. This study used quantitative descriptive analysis with a purposive sampling technique in three ponds for three maintenance cycles. The result of the study on three cycles of vannamei shrimp culture with low salinity overall found that productivity ranged from 2.35 to 3.69 kg/m2. ADG values in aquaculture ponds ranged from 0.26 – 0.36 g/day. The survival rate ranged from 61% to 98%, and the feed conversion ratio ranged from 1.01 to 1.62. The survival rate tends to increase, and FCR value tends to decrease in 3 cycles of cultivation. Water quality including temperature, dissolved oxygen, pH, phosphate, ammonia, and TOM indicate the optimal range based on water quality standards for intensive vannamei shrimp culture (SNI 01-7246-2006). At the same time, nitrite and alkalinity exceed the SNI standard but this nitrite and alkalinity level could still be tolerated by vannamei shrimp during the rearing period. Overall, water quality during the rearing period can still support the growth of vannamei shrimp. The above result showed that vannamei shrimp culture at low salinity (6-8 mg L-1) has the potential to be developed.Keywords:Intensive culture Litopenaeus vannamei Low salinityProductivity

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Tibor Feledi, Svetlana Lengyel, and András Rónyai. "Preliminary results of intraspecific sterlet hybrid (Siberian sterlet × sterlet) rearing under intensive conditions." Acta Agraria Debreceniensis, no. 48 (July 31, 2012): 17–19. http://dx.doi.org/10.34101/actaagrar/48/2446.

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Due to early maturation and a small size, sterlet (Acipenserrut-henus) is a very advantageous fish for intensive sturgeon farming with regard to caviar production. According to our previous observations, the growth potential of Siberian sterlet (A.ruthenusmarsiglii) is higher than that of the European one. In our experiment, sterlet and an intraspecific hybrid (Siberian sterlet × sterlet) were tested under intensive tank conditions. During the 8 weeks of the experiment, survival, growth and size heterogeneity were investigated. According to the results, there were no significant differences in survival and growth but the size heterogeneity was higher in the hybrid. It is supposed that, in our trial, the applied water temperature range (24.0–25.5 °C) was optimal for sterlet, but was probably above the optimal range for the hybrid.

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Pristupa, V. N., and D. S. Torosyan. "Influence of different factors on the growth rate of young animals and the quality of beef." Glavnyj zootehnik (Head of Animal Breeding), no. 3 (March 1, 2021): 28–39. http://dx.doi.org/10.33920/sel-03-2103-03.

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The purpose of the work was to study and identify the main factors aff ecting the quantity and quality of beef produced and sold in the Southern Federal district. A comparative assessment of the growth, development, formation of meat productivity and quality of beef of young animals of beef, dual and dairy breeds with stall-pasture technology and intensive rearing in the industrial complex. Experimental studies have been carried out in farms in the Rostov region. The object of research was cows with calves of Kalmyk, Hereford, Aberdeen-Angus, Russian komolaya, Kazakh White-headed breeds, as well as young animals of the same breeds, in addition, Black-and-White and Swiss breeds. Removable live weight in Hereford steers at 18 months of age was 658,0 kg, and Aberdeen-Angus – 655,2 kg. Domestic steers of Kalmyk were 41–44 kg lower in live weight than their herdmates of two imported breeds. However, with intensive rearing at 18 months of age, steers of Kalmyk breed had a removable live weight of more than 613,7 kg and a carcass weight of 326 kg. The yield of hot carcass was 55,4 %, and the slaughter yield was 58,89 %, which was only 1–2 % lower than the world’s leading beef breeds. It has been found when analyzing the results of boning the half-carcasses of experimental steers that the biggest weight of half-carcasses and the content of muscle and fat tissue in them in absolute terms were in Hereford steers. Steers of Kalmyk breed took the third place in terms of weight of large-sized semi–fi nished products and signifi cantly lost to Aberdeen-Angus herdmates by 7,3 kg or 6,5 %, and Hereford steers by 9,2 kg or 8,3 %. The results obtained prove the expediency of using stallpasture technology in the dry-steppe zone of the Southern Federal district when rearing young animals for beef up to 350–400 kg live weight at 15 months of age and its subsequent intensive rearing under industrial technology, in order to obtain the live weight of more than 570 kg and produce cost-eff ective beef.

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Wang, Wenxing, Guoqi Dang, Imran Khan, Xiaobin Ye, Lei Liu, Ruqing Zhong, Liang Chen, Teng Ma, and Hongfu Zhang. "Bacterial Community Characteristics Shaped by Artificial Environmental PM2.5 Control in Intensive Broiler Houses." International Journal of Environmental Research and Public Health 20, no. 1 (December 30, 2022): 723. http://dx.doi.org/10.3390/ijerph20010723.

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Multilayer cage-houses for broiler rearing have been widely used in intensive Chinese farming in the last decade. This study investigated the characteristics and influencing factors of bacterial communities in the PM2.5 of broiler cage-houses. The PM2.5 samples and environmental variables were collected inside and outside of three parallel broiler houses at the early, middle, and late rearing stages; broiler manure was also gathered simultaneously. The bacterial 16S rRNA sequencing results indicated that indoor bacterial communities were different from the outdoor atmosphere and manure. Furthermore, the variations in airborne bacterial composition and structure were highly influenced by the environmental control variables at different growth stages. The db-RDA results showed that temperature and wind speed, which were artificially modified according to managing the needs for broiler growth, were the main factors affecting the diversity of dominant taxa. Indoor airborne and manurial samples shared numerous common genera, which contained high abundances of manure-origin bacteria. Additionally, the airborne bacterial community tended to stabilize in the middle and late stages, but the population of potentially pathogenic bacteria grew gradually. Overall, this study enhances the understanding of airborne bacteria variations and highlighted the potential role of environmental control measures in intensive farming.

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Kumar, Arvind, N. Ramachandran, S. P. Singh, Nandhini Sharma, R. Pourouchottamane, Gopal Dass, and A. K. Goel. "Plastic slatted flooring for intensive rearing of muzaffarnagari lambs in semi-arid region." Indian Journal of Small Ruminants (The) 25, no. 2 (2019): 231. http://dx.doi.org/10.5958/0973-9718.2019.00039.4.

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Chowdhury, S. A., M. S. A. Bhuiyan, and S. Faruk. "Rearing Black Bengal Goat under Semi-Intensive Management 1. Physiological and Reproductive Performances." Asian-Australasian Journal of Animal Sciences 15, no. 4 (April 1, 2002): 477–84. http://dx.doi.org/10.5713/ajas.2002.477.

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Feledi, Tibor, and András Rónyai. "Preliminary results on Siberian sterlet (Acipenser ruthenus marsiglii) fries rearing under intensive conditions." Acta Agraria Debreceniensis, no. 51 (February 10, 2013): 27–31. http://dx.doi.org/10.34101/actaagrar/51/2057.

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Abstract:

In our experiments production performances of Siberian sterlet were tested under intensive tank conditions. During the 25 days long experiment effectiveness of weaning to artificial diet of the fish was investigated. Production performances of fish fed on exclusively dry diet from the beginnings were lower than the other two groups. Between the values of sterlets fed on live food also then suddenly vs. continuously were weaned to dry diet there were no significant differences. Based on our results live food feeding could be suggested for the Siberian sterlet larvae for some days but the method of the weaning to dry diet has no significant influence to the production performances. In 21 days long experiment four different feeding frequencies were tested in Siberian sterlet (~13 g) fingerlings. Dry feed was offered for the fish continuously, 2, 3 and 4 times per day. There were no significant differences between the values of the four treatments. Based on our results there is no high influence of feeding frequency in case of this size group of Siberian sterlet. During the nursing in two different size groups of Siberian sterlet the optimal daily amounts of feed were aimed to determine. In case of growth values of the group fed at 7% of the total biomass were higher than the other two groups (3 and 5%). Feeding performances of fish fed at 5% were significantly better than fish fed at 7%. Based on our results for ~20 g size of the subspecies at least 5% of total body weight could be suggested. In case of ~150 g size of the fish the production performances of fish fed at 1% were lower than the other two groups (2 and 3%). Between the values of stocks fed at 2 and 3% there were no significant differences. Based on these results 2% of total body weight of dry feed could be suggested for the Siberian sterlet with ~150 g body weight.

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