Comparative study of the concentrations of peripheral progesterone before and after PGF2α injection between Bos taurus (Brown Swiss) and Bos indicus (Indobrazil) in the tropics

The objective of this study was to characterize meat quality in Bos taurus and Bos indicus and to determine the influence of finishing system and genetic group on the physicochemical properties of the longissimus thoracis at 24 hours and 10 days post mortem (1ºC). The sample included 160 bulls of the B. taurus (n=75) and B. indicus (n=85) groups, finished either on pasture (n=46) or with grain supplementation (n=114), slaughtered at a carcass weight of 270 to 300 kg. Pasture-finished animals had higher pH, lower red content and a fat content 2.5 times lower than those finished with supplementation. Meat from supplement-finished animals had lower shear force in comparison to that from animals finished on pasture, with means of 7.7 and 8.5 kg at 24 hours, and of 5.5 and 5.9 kg at 10 days, respectively. Samples of B. taurus and B. indicus were similar in moisture and protein, but B. taurus presented higher means for ash and lower means for fat. Aged samples of B. indicus finished on pasture showed lower values for lightness and yellowness. Overall, lightness and yellow content increased and red content decreased with 10-day ageing. Means for shear force were lower in B. taurus than in B. indicus, with differences of 1.4 kg in fresh meat and 0.6 kg in aged samples. The reduction in shear force with ageing was more pronounced in samples with higher initial shear force, in spite of the positive relationship between shear force before and after ageing.

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A COMPARATIVE STUDY OF EXPERIMENTAL ANAPLASMOSIS IN BOS INDICUS AND BOS TAURUS CATTLE

Australian Veterinary Journal ◽

10.1111/j.1751-0813.1980.tb05719.x ◽

1980 ◽

Vol 56 (6) ◽

pp. 262-266 ◽

Cited By ~ 5

Author(s):

C. Otim ◽

A. J. Wilson ◽

R. S. F. Campbell

Keyword(s):

Comparative Study ◽

Bos Taurus ◽

Bos Indicus

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Thermosensitivity of Bos indicus cattle and their F1, crosses with three breeds of Bos taurus

Animal Science ◽

10.1017/s0003356100005687 ◽

1991 ◽

Vol 52 (1) ◽

pp. 57-65 ◽

Cited By ~ 7

Author(s):

Khub Singh ◽

N. K. Bhattacharyya

Keyword(s):

Ambient Temperature ◽

Rectal Temperature ◽

Heat Production ◽

Bos Taurus ◽

Bos Indicus ◽

Metabolizable Energy ◽

Ambient Temperatures ◽

Brown Swiss ◽

Genetic Groups ◽

Holstein Friesian

ABSTRACTResting heat production (H), respiratory rate (RR) and rectal temperature (Tr) were measured at different controlled temperatures (Tt) in Hariana (Bos indicus) and its F, crosses with Jersey (JH), Brown Swiss (BH) and Holstein Friesian (FH) (Bos taurus) breeds and the values obtained were used to assess their relative thermosensitivity.The lowest Tt at which H significantly decreased from that at 17°c was 32°c for Hariana, JH and BH and 27°c for FH after exposure for 8 days. The corresponding values after exposure for 18 days were 37°c for Hariana and 32°c for all the three crossbred groups. Differences between the genetic groups were also significant. The lowest Tt at which metabolizable energy (ME) decreased significantly in comparison with those at 17CC was 32°c in all the genetic groups. The differences in ME intake between genetic groups were significant only at 32°c Tt. The lowest Tt at which RR significantly increased from those at 17°c were 32°c in Hariana, 27°c in JH, BH and FH for both 5 to 7 and 15 to 17 days of exposure. The corresponding Tt for increase in Tr was 37°c in Hariana, 32°c in JH and 27°c in BH and FH at both 5 to 7 and 15 to 17 days of exposure.The ambient temperature at which H would have significantly decreased and RR and Tr increased from the respective values at 17CC Tt were calculated curvilinearly for different genetic groups. There were differences in these values of calculated ambient temperatures between genetic groups and between exposure durations in respect of H, RR, and Tr, indicating differences in thermosensitivity.

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Effect of heat stress on the expression profile of Hsp90 among Sahiwal (Bos indicus) and Frieswal (Bos indicus×Bos taurus) breed of cattle: A comparative study

Gene ◽

10.1016/j.gene.2013.11.086 ◽

2014 ◽

Vol 536 (2) ◽

pp. 435-440 ◽

Cited By ~ 56

Author(s):

Rajib Deb ◽

Basavaraj Sajjanar ◽

Umesh Singh ◽

Sushil Kumar ◽

Rani Singh ◽

...

Keyword(s):

Heat Stress ◽

Comparative Study ◽

Expression Profile ◽

Bos Taurus ◽

Bos Indicus

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Oestrous cycle synchronization and oestrus induction in indigenous and European cattle in Tanzania

The Journal of Agricultural Science ◽

10.1017/s002185960008641x ◽

1973 ◽

Vol 81 (3) ◽

pp. 381-389 ◽

Cited By ~ 5

Author(s):

H. Schmidt ◽

W. Jöchle ◽

D. Smidt

Keyword(s):

Bos Taurus ◽

Oral Treatment ◽

Treatment Success ◽

Bos Indicus ◽

Oestrous Cycle ◽

Estradiol Valerate ◽

Wide Range ◽

Reproductive Life ◽

The Tropics ◽

European Cattle

SUMMARYFrom 1969 to 1971, 743 animals (indigenous Zebu and European dairy cattle, lactating or dry cows and heifers) received oestrous cycle synchronization treatments at government-owned and private ranches and farms in the Tanzanian highlands (West Kilimanjaro); 445 matching animals served as controls. Treatment schedules consisted of chlormadinone acetate (CAP) given daily for 14 days (10 mg/day) orally; or a single CAP injection (50 mg) followed by 4 or 5 days of oral treatment (10 mg/day) 9–12 or 11–15 days later. In addition, some groups received either estradiol valerate (5 mg) together with the CAP injection, or 10 mg/day mestranol from day 11 to 15, together with CAP; one treatment group received 1000 i.u. of HCG after the last CAP medication and were inseminated 12 and 24 h thereafter. Animals were either inseminated or bred naturally. With all treatment schedules, good synchronization, unimpaired fertility and consistently a significant reduction of anoestrus was achieved. Oestrogen treatments had no effects; treatment with 1000 i.u. of HCG was unsuccessful. Management factors, food supply and phase of reproductive life had significant impacts on treatment success and fertility. Synchronization can be used successfully under a wide range of management conditions to unfold existing potentials of artificial insemination in Bos indicus and Bos taurus in the tropics.

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Effect of delayed castration on the growth rate, behaviour and serum insulin-like growth factor-1 concentration of beef cattle on tropical pasture

Animal Science ◽

10.1017/s1357729800052814 ◽

2002 ◽

Vol 75 (1) ◽

pp. 41-47

Author(s):

C. Gazzola ◽

M. R. Jeffery ◽

D. H. White ◽

R. A. Hill ◽

D. J. Reid

Keyword(s):

Growth Rate ◽

Growth Factor ◽

Bos Taurus ◽

Serum Insulin ◽

Bos Indicus ◽

Animal Behaviour ◽

Insulin Like Growth Factor ◽

Oestradiol Treatment ◽

Before And After ◽

Beef Producers

AbstractMale beef calves in northern Australia are generally castrated under 6 months of age as an aid to management of animal behaviour and for the purpose of producing sufficiently fat carcasses at slaughter. It is also common for beef producers to administer hormone growth promotants, such as oestradiol, to increase the growth rates of steers at pasture. This experiment tested the hypothesis that delaying castration by 9 months would produce an increase in growth rate for the period while the cattle are retained as bulls without compromising management of animal behaviour. Bulls of three genotypes were castrated at 7 months or 16 months of age and half were treated with oestradiol after castration. Body weight (BW) and serum insulin-like growth factor-1 concentrations (IGF-1) were measured and behaviour was observed before and after the 16 month castration. At both 7 and 16 months of age, surgical castration of bulls caused no animal welfare problems. BW gain was affected by genotype with Bos taurus types having a lower BW gain than Bos indicus and F1-cross cattle. IGF-1 was similarly affected by genotype. Oestradiol treatment increased growth of the steers (early castrates) during the 9 months between castration times compared with non-implanted steers and bulls. Oestradiol implanted steers had similar BW gain from the late castration to slaughter, regardless of age at castration, which was greater than non-implanted early castrates which, in turn, was greater than the late castrates. Similar differences were observed for IGF-1 concentrations. Behaviour was not affected by genotype, oestradiol treatment or age of castration but this may have been an artefact of the design where all treatment groups were grazed together. Although delayed castration resulted in no behavioural or management problems, it did not produce a commercially useful increase in growth rate.

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