Abstract:-The objective of this study was to evaluate the performance of 17 buffaloes (Mediterranean), from birth to slaughter age (720 days) with monthly measures of weight, thoracic perimeter, body length, and height at withers. At the end of experimental period, the animals were separated into two different groups for statistical analysis according to slaughter weight: light body weight (LBW, mean 517 kg) and heavy body weight (HBW, mean 568 kg). Buffalo growth occurs in the same way up to weaning age, and after tha… Show more
“…Body weight gain of animals after weaning is a substantial feature for growth evaluation which is not only limited within breed, sex, nutrition etc. (Alves and Franzolin, 2015).…”
Section: Average Body Weight Gain Of Buffalo Progeny At Weaning and Ymentioning
This study was planned to clarify the variation of body weight and average daily gain traits in both indigenous and F1 crossbreed (Local×Mediterranean) buffalo at weaning (sixth month) and yearling stages (twelfth month). Data were collected from 33 indigenous and 35 F1 crossbred buffalo progeny during the period of 2011 to 2014 with intensive management system at Research and Development farm of Lal Teer Livestock Limited in Bangladesh. The gathered data were analyzed using general linear model (GLM) and independent sample t test. The effect of parity, sex, season and breeding year on body weight and average daily gain were observed where significant values found in breeding period (p <0.01) of crossbred buffalo for body weight. It might be the reason of crossbreeding to indigenous buffalo cows using imported semen with better genetic merit. The parity (p <0.05), season (p <0.05) and breeding period (p <0.01) were also significant for average daily gain measurement which suggesting environmental adaptability beside additive genetic effects. Body weights were measured at weaning and yearling stages for both local (113 to 195 kg) and F1 crossbred (144 to 220 kg) buffalo progeny to screen the elite offspring for the Genetic Farm and Bull station. Similarly, average daily gain observed 469 to 457 g and 600 to 506 g at the previously mentioned two stages for both local and F1 buffalos, respectively. It was observed that studied traits were comparatively better in F1 buffalo progeny than indigenous. The comparison of average daily weight gains between indigenous and F1 buffalos at weaning and yearling periods showed significant differences for body weight (p <0.001) and average daily gain (p <0.05), respectively. It is concluded that genetic gain might be possible in local buffalo population by grading up process which could switch the traditional buffalo rearing to commercial level as well as meeting the nutritional demand of country people.
“…Body weight gain of animals after weaning is a substantial feature for growth evaluation which is not only limited within breed, sex, nutrition etc. (Alves and Franzolin, 2015).…”
Section: Average Body Weight Gain Of Buffalo Progeny At Weaning and Ymentioning
This study was planned to clarify the variation of body weight and average daily gain traits in both indigenous and F1 crossbreed (Local×Mediterranean) buffalo at weaning (sixth month) and yearling stages (twelfth month). Data were collected from 33 indigenous and 35 F1 crossbred buffalo progeny during the period of 2011 to 2014 with intensive management system at Research and Development farm of Lal Teer Livestock Limited in Bangladesh. The gathered data were analyzed using general linear model (GLM) and independent sample t test. The effect of parity, sex, season and breeding year on body weight and average daily gain were observed where significant values found in breeding period (p <0.01) of crossbred buffalo for body weight. It might be the reason of crossbreeding to indigenous buffalo cows using imported semen with better genetic merit. The parity (p <0.05), season (p <0.05) and breeding period (p <0.01) were also significant for average daily gain measurement which suggesting environmental adaptability beside additive genetic effects. Body weights were measured at weaning and yearling stages for both local (113 to 195 kg) and F1 crossbred (144 to 220 kg) buffalo progeny to screen the elite offspring for the Genetic Farm and Bull station. Similarly, average daily gain observed 469 to 457 g and 600 to 506 g at the previously mentioned two stages for both local and F1 buffalos, respectively. It was observed that studied traits were comparatively better in F1 buffalo progeny than indigenous. The comparison of average daily weight gains between indigenous and F1 buffalos at weaning and yearling periods showed significant differences for body weight (p <0.001) and average daily gain (p <0.05), respectively. It is concluded that genetic gain might be possible in local buffalo population by grading up process which could switch the traditional buffalo rearing to commercial level as well as meeting the nutritional demand of country people.
“…the measures of bone growth and body length as those are influenced the growth of organs, muscle, and adipose tissue (Alves and Franzolin, 2015). Campêlo et al (2004) reported that the maternal effect is slowly faded away after weaning and the direct genetic effect contributed more in the growth of the animals thereafter.…”
The buffalo is considered as fast-growing meat producing animal compare to cattle with lower cholesterol and higher nutrition content. This study was planned to elucidate the variation of body weight and average daily gain in both indigenous and F1 crossbred (Indigenous×Mediterranean) buffalo. Body weight was measured every three months from birth up to yearling stage for both indigenous (28-195 kg) and F1 crossbred (35-220 kg) buffalo progenies during the year 2011-2014. It was observed that body weight of indigenous buffalo significantly (p <0.05) differed in pre-weaning stage for first parity (81 kg) compared to second parity (73 kg) while seasonal variations showed similar differences (p <0.05) in pre-weaning (86 kg in winter) and post-weaning (177 kg in winter) periods. However, there were no significant variations (p >0.05) found for body weight in crossbred buffaloes except differences (p <0.001 to p <0.05) from pre-weaning (110 kg) to post-weaning (207 kg) during the change of year. Significant differences (p <0.05-p <0.01) were observed for the effect of two parities and three seasonal variations at three (566 and 642 g), six (488 and 540 g) and nine (485 and 552 g) months of age in average daily gain of indigenous buffalo progenies, respectively. No significant variations were identified in crossbred progenies excluding year (p <0.001 to p <0.05) while highest average daily gain was found in three (818 g/day), six (600 g/day) and nine (631 g/day) months of age. Crossbred buffaloes were found to be superior compared to indigenous which could be used in the meat industry through a systemic breeding programme.
“…All dimensional values were converted to grams for mass and to days for time. We supplemented our dataset with other sources in the instances of missing data for domesticated species ( 59 – 89 ). Given the extensive size variation present in some domesticated species, we made sure to select all variables from the same breed (e.g., German shepherds for dogs) of approximately similar size to wild counterparts under normally reproducing conditions.…”
Significance
Here, we demonstrate that a naturally evolving behavior (allonursing) has greater effect on reproductive power (mass per unit of time) and output (litter mass at birth) than does artificial selection (domestication). Additionally, we demonstrate the importance of resource optimization afforded by sociality (rather than resource abundance per se) in shaping a species’ life history profile and its ability to overcome its own physiological constraints.
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