K. G. Odde

Effect of forty-eight-hour calf removal, once- or twice-daily suckling and Norgestomet on beef cow and calf performance.

Trials were conducted in 1980 and 1981 to evaluate the effects of once-daily suckling, twice-daily suckling, 48-h calf removal, and Norgestomet on performance of spring-calving cows and their calves. Eighty-three and 73 Polled Hereford and 29 and 42 Simmental-cross cows were utilized in 1980 and 1981, respectively. Cows were allotted by age, breed, calving date and winter nutrition treatment to one of four groups: 1) once-daily suckle for 24 d starting 11 d before the beginning of the breeding season, 2) twice-daily suckle (same time frame as 1), 3) 48-h calf removal ending immediately before the breeding season, 4) calves remained with cows (controls). One-half.of each group was implanted with Norgestomet from 11 until 2 d before the start of the breeding season. Once- and twice-daily suckling increased (P<0.05) the percentage of noncycling cows showing estrus the first 3 wk after the start of treatment. Pregnancy rates for the breeding season were higher (P<0.1) in the once-daily suckle and 48-h calf removal groups for cows that had not exhibited estrus before the beginning of treatment. Norgestomet increased (P<0.05) the percentage of cows showing estrus within 3 wk after the start of treatment within the 48-h calf-removal and control groups. Milk production was not affected (P>0.1) by suckling treatment. Calf weight gains during suckling treatment were greater (P<0.05) in control and twice-daily suckled calves than in 48-h calf removal or once-daily suckled calves. Suckling treatment did not affect (P>0.1) adjusted weaning weights of calves or frequency and duration of suckling recorded 2 wk after the end of suckling treatment.

Trends in Beef Calf Lots by Single Breed Sire Groups Marketed via Video Auction from 2010 Through July 14, 2017

Objective: The objective was to characterize the potential change in the percentage of lots of beef calves sired by a single breed marketed via video auction from 2010 through July 14, 2017. Study Description: Information describing factors about lots sold through a livestock video auction service (Superior Livestock Auction, Fort Worth, TX) was obtained in electronic format. Sire breed of a lot was determined based on the description provided by sellers. All calves in a lot were sired by a single breed and a minimum of 50 lots were required for the analysis. The Cochran-Armitage trend test was used to determine an increasing or decreasing trend over time with a P≤0.05 considered significant. The Bottom Line: Producers marketing calves via video auction may be changing the genetics of their sires to use on a primarily black cow herd.

Trends in Source and Age Verification for Beef Calves Sold via Summer Video Auction from 2010 Through 2017

Objective: The objective of this study was to quantify the effect of source and age verification status on the sale price of beef calf lots sold via summer video auctions from 2010 through 2017 while adjusting for all other factors that significantly influenced sale price. Study Description: Information describing factors about lots sold through a livestock video auction service (Superior Livestock Auction, Fort Worth, TX) was obtained from the auction service in an electronic format. These data were collected for 36,570 lots of beef calves that were sold via 61 summer sales from 2010 through 2017. A model was developed for each year to quantify the effects of all factors describing beef calf lots that significantly affected sale price. The Bottom Line: Though the percent of lots qualified for source and age verification decreased from 2011 to 2016, premiums were garnered from verified lots. The percentage of lots enrolled may continue to increase with new export markets.

Decline in Brahman Breed Influence of Beef Calf Lots Marketed by Video Auction from 1995 to 2015

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