A randomised clinical trial on the efficacy of oxytetracycline dose through water medication of nursery pigs on diarrhoea, faecal shedding of Lawsonia intracellularis and average daily weight gain

The majority of lamb losses occur within the first two weeks of life, with cold stress being a major cause of lamb morbidity and mortality. This study investigated the effect of insulating lamb jackets on newborn lambs. One hundred and four newborn lambs were randomly allocated by birth date to two treatment groups, (a) non-jacketed (n = 52) or (b) jacketed (n = 52), for fourteen days after birth. The live weights of lambs were recorded regularly up to 21 days, and average daily weight gains were calculated from these data. For the first two days after recruitment to the study, surface and body temperatures of lambs were also recorded. The jackets significantly increased the lambs’ surface temperatures, providing a warmer microclimate and reduced cold stress for jacketed lambs. There was no significant effect of the insulating jackets on estimated body temperatures, live weights or average daily weight gain of the lambs in this study. There were no detrimental effects of the jackets, and no rejection of lambs occurred.

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Performance of some growth promoters on hybrid walking catfish (Clarias batrachus × Clarias gariepinus)

Asian Journal of Medical and Biological Research ◽

10.3329/ajmbr.v3i1.32044 ◽

2017 ◽

Vol 3 (1) ◽

pp. 103-108

Author(s):

Md Sirazul Islam ◽

M Mamnur Rashid ◽

Mohammad Shamsul Arefin ◽

Pronab Naha ◽

Md Rokanuddula

Keyword(s):

Weight Gain ◽

Control Diet ◽

Animal Health ◽

Clarias Gariepinus ◽

Survival Rates ◽

Clarias Batrachus ◽

Daily Weight Gain ◽

Growth Promoter ◽

Average Daily Weight Gain ◽

Growth Promoters

A study was conducted to determine the efficacy of three most commonly used growth promoters from different pharmaceutical companies on growth performance of hybrid walking catfish (Clarias batrachus × Clarias gariepinus). The experiment was done in the wet laboratory of the Department of Aquaculture, BAU, Mymensingh, with a total of 10 aquaria and 160 fish having mean initial weight of 6.3 ± 0.48 g. The three growth promoters, Charger gel from Fishtech (BD) Ltd., Growth gel from Advance Agrotech (BD) Ltd. and Hepaprotect-aqua from Renata Animal health Ltd., were used in separate nine (9) aquaria at recommended, lower dose and higher dose respectively. One aquarium was used as control (diet without any growth promoter). The fish were fed with paragon nursery floating feed at 20% of body weight in each aquarium for 28 days. Doses of Charger gel were given as 80, 60 and 100 mg/20 g feed/day, that of Growth gel, 0.14, 0.12 and 0.16 ml/20 g feed/day and of Hepaprotect-aqua, 30, 15 and 50 mg/20 g feed/day. Re-circulatory system was used throughout the experimental period. By applying recommended, lower and higher dose of Charger gel, mean final weights were found as 23.0, 21.9 and 35.9 g; average daily weight gain as 0.60, 0.56 and 1.06 g and specific growth rate (SGR) as 2.01, 1.93 and 2.70% respectively. For Growth gel, mean final weights were found as 22.8, 17.3 and 31.1 g; average daily weight gain as 0.59, 0.39 and 0.88 g and SGR as 1.99, 1.57 and 2.48 % respectively. For Hepaprotect-aqua, mean final weights were found as 24.2, 17.5 and 28.2 g; average daily weight gain as 0.64, 0.40 and 0.78 g and SGR as 2.09, 1.58 and 2.32% respectively. In all the cases survival rates were 100%. All the three growth promoters showed better results at their higher doses in comparison to their results in lower and recommended doses. However, in average Charger gel showed the best result than the other two growth promoters. This information on the efficacy study of growth promoters needs to be disseminated to the farmers for improved fish production.Asian J. Med. Biol. Res. March 2017, 3(1): 103-108

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Optimization of hormonal dose during masculinization of tilapia (Oreochromis niloticus) fry

Journal of the Bangladesh Agricultural University ◽

10.3329/jbau.v9i2.11052 ◽

2012 ◽

Vol 9 (2) ◽

pp. 359-364 ◽

Cited By ~ 2

Author(s):

Z Ferdous ◽

MM Ali

Keyword(s):

Weight Gain ◽

Oreochromis Niloticus ◽

Fish Growth ◽

Daily Weight Gain ◽

Optimum Dose ◽

Trial Period ◽

Growth Data ◽

Average Daily Weight Gain ◽

Male Population ◽

Commercial Feed

The experiment was conducted to optimize the dose of 17?-methyl testosterone (MT) during masculinization of tilapia (Oreochromis niloticus) fry. Five treatments were designed with various doses of hormone to find out the most effective one. The treatments were designated as T1 (0 mg MT/kg), T2 (40 mg MT/kg), T3 (50 mg MT/kg), T4 (60 mg MT/kg) and T5 (70 mg MT/kg). MT was administered orally by using nursery feed and Ethanol (as hormone carrier solvents) diet to tilapia fry for 28 days in hapa. After completion of the trial period of 28 days nursing of the experimental fry was continued for further 2 months with commercial feed. At the end of experiment the sex ratio was determined by examining gonad after dissecting the fish. Growth performance was monitored by recording the morphometric characteristics i.e. weight gain (g), average daily weight gain (g). The analysis of growth data showed significant variation in weight, % weight gain, SGR (% /day) of fish among the different treatments. SGR increases with the increase of hormone dose. The present study demonstrated that all MT receiving treatments showed a significantly (p<0.01) higher male proportion (94.28%) than control (48.57%). The dose of 60 mg MT/kg of feed resulted in maximum male population (94.28%). The result indicated that the optimum dose of MT hormone was 60 mg /kg with a feeding period of 28 days after hatching. DOI: http://dx.doi.org/10.3329/jbau.v9i2.11052 J. Bangladesh Agril. Univ. 9(2): 359364, 2011

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Influence of gender on carcass yield of twin lambs Blackbelly x Pelibuey at 56 days of age

Arquivo Brasileiro de Medicina Veterinária e Zootecnia ◽

10.1590/1678-4162-8215 ◽

2016 ◽

Vol 68 (4) ◽

pp. 1077-1084

Author(s):

I. del C. García-Osorio ◽

J. Oliva-Hernández ◽

M.M. Osorio-Arce ◽

G. Torres-Hernández ◽

J. A. Hinojosa-Cuéllar ◽

...

Keyword(s):

Body Weight ◽

Weight Gain ◽

Growth Yield ◽

Daily Weight Gain ◽

Longissimus Dorsi ◽

Average Daily Weight Gain ◽

Carcass Yield ◽

Longissimus Dorsi Muscle ◽

Dorsi Muscle ◽

Males And Females

ABSTRACT The aim of this study was to determine the influence of gender on pre-weaning growth, yield and weight of primal cuts of the carcass of Blackbelly x Pelibuey lambs. 16 twin lambs were used. The lamb gender was the fixed factor. The variables evaluated were: body weight at birth and at weaning, average daily weight gain, weight and yield of carcass and primal cuts: neck, arm, thorax, abdomen and leg. Gender did not affect (P>0.05) body weight at birth. However, the pre-weaning average daily weight gain and body weight at weaning were affected (P<0.05) by the gender. Hot carcass yield and weight and primal cuts were not affected (P>0.05) by the gender of the lamb. Nevertheless, the area of the Longissimus dorsi muscle and cavity fat were different between males and females (P<0.05) 11.5±0.73cm2 and 198±0.05 g vs 9.3±0.73cm2 and 282±0.05g, respectively. In conclusion, in twin lambs Blackbelly x Pelibuey males had greater average daily weight gain and body weight at weaning than females. Carcass yield and weight and primal cuts were not affected by the gender of the lamb. However, males had greater area of the L. dorsi muscle than females and these in turn had a greater amount of cavity fat than males.

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The dynamics of changes in selected parameters in relation to different air temperature in the farrowing house for sows

Czech Journal of Animal Science ◽

10.17221/310-cjas ◽

2008 ◽

Vol 53 (No. 5) ◽

pp. 195-203 ◽

Cited By ~ 7

Author(s):

S. Odehnalová ◽

A. Vinkler ◽

P. Novák ◽

J. Drábek

Keyword(s):

Weight Gain ◽

Air Temperature ◽

Daily Weight Gain ◽

Average Daily Weight Gain ◽

Raw Data ◽

Mild Winter ◽

Housing Environment ◽

Lactating Sows

The purpose of this study was to analyse the influence of different external air temperature on changes in the air temperature of housing environment in the farrowing house for sows and consequent changes in selected parameters of performance in purebred Landrace sows and gilts. Raw data were analysed for 236 litters. The litters were born from October 2004 to March 2006. Air temperature in the farrowing house was monitored in the sow’s living zone and was closely related to changes in external air temperature (P < 0.01). At the optimal internal temperatures for lactating sows (16–22°C) during mild winter the lowest incidence of stillbirths (9.92%) was detected, whereas at high internal temperatures (above 28°C) the incidence of stillbirths was 11.32% (P < 0.01). The lowest average daily weight gain was recorded during mild winter (P < 0.05).

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Efficacy of a novel intradermal Lawsonia intracellularis vaccine in pigs against experimental infection and under field conditions

Porcine Health Management ◽

10.1186/s40813-020-00164-0 ◽

2020 ◽

Vol 6 (1) ◽

Author(s):

A. A. C. Jacobs ◽

F. Harks ◽

R. Pauwels ◽

Q. Cao ◽

H. Holtslag ◽

...

Keyword(s):

Weight Gain ◽

Field Study ◽

Live Vaccine ◽

Field Conditions ◽

Daily Weight Gain ◽

Lawsonia Intracellularis ◽

Mixed Use ◽

Freeze Dried ◽

Challenge Control ◽

Intradermal Vaccine

Abstract Background The efficacy of a novel inactivated intradermal Lawsonia intracellularis vaccine, Porcilis® Lawsonia ID, was evaluated in two experimental vaccination-challenge studies and under field conditions on a farm with a history of recurrent acute ileitis. In addition, the efficacy of the vaccine was compared to that of a commercially available live attenuated vaccine. The novel inactivated vaccine consists of a freeze-dried antigen fraction that is dissolved just prior to use in either the adjuvant or in Porcilis® PCV ID; an existing intradermal vaccine against porcine Circovirus type 2. In the two experimental vaccination-challenge studies, groups of 25 piglets were vaccinated once at 3 weeks of age or left unvaccinated as challenge control. Vaccines tested were Porcilis® Lawsonia ID as standalone (study 1) or in associated mixed use with Porcilis® PCV ID (study 2) and an orally administered commercially available live vaccine (study 1). The pigs were challenged with virulent L. intracellularis at 4 weeks (study 1) or 21 weeks (study 2) after vaccination. Post-challenge, the pigs were evaluated for clinical signs, average daily weight gain, shedding and macroscopic as well as microscopic immuno-histological ileum lesion scores. In the field study, the mortality and key performance parameters were evaluated over a period of 8 months. Results The results of the two experimental vaccination-challenge studies showed that Porcilis® Lawsonia ID as single vaccine or in associated mixed use with Porcilis® PCV ID, induced statistically significant protection against experimental L. intracellularis infection, 4 weeks or 21 weeks after vaccination. This was demonstrated by lower clinical scores, improved weight gain, reduction of L. intracellularis shedding and reduction of macroscopic as well as microscopic ileum lesion scores when compared to the controls. The protection induced was superior to that of the commercially available live vaccine. In the field study Porcilis® Lawsonia ID was highly efficacious in reducing L. intracellularis associated mortality and improving key production parameters. Conclusion The results support that this new intradermal vaccine is efficacious against L. intracellularis and may be used in associated mixed use with Porcilis® PCV ID.

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