PMID: 1200929Oct 1, 1975Paper

Pregnancy in slaughtered cows in North-Eastern Australia: incidence and relationship to pregnancy diagnosis, season, age and carcase weight

Australian Veterinary Journal
P W LaddsJ D Humphrey

Abstract

A total of 7495 postpuberal beef cows from herds in north Queensland and the Northern Territory were examined at abattoirs to define the extent of wastage due to the slaughter of pregnant cows. On the basis of examination of teeth most cows (57%) were considered mature (approximately 3.5 to 7 years) at slaughter; 14% were young (9 months to 3.5 years) and 29% were old (over 7 years). In herds where pregnancy diagnosis by rectal examination had not been used at time of culling, 71.6% of slaughtered cows were pregnant and 42% of these cows were in the second trimester. This high pregnancy rate was considered an important source of herd wastage. Pregnancy rate varied little with season, but the highest percentages of cows pregnant in the first and third trimesters were recorded in autumn and spring, respectively. Most cows found non-pregnant had active ovaries at time of slaughter. Anoestrus was observed to be most common in winter and in old cows. Lactational status was not recorded. Mean cold carcase weight of 4229 cows was 161 +/- 40 kg. Maximum carcase weight was observed in cows slaughtered at 4 to 6 years of age; old cows had the lowest carcase weight (147 +/- 31 kg) of the age groups considered. Highest (170 +/- 43 kg) and ...Continue Reading

References

Sep 1, 1974·Australian Veterinary Journal·P M Summers
May 1, 1973·Australian Veterinary Journal·A W Lepper, C W Pearson
Apr 1, 1972·International Journal of Biometeorology·W Jöchle
Dec 1, 1967·Australian Veterinary Journal·R C Duncan
Sep 1, 1967·Journal of Animal Science·H A FitzhughR S Temple

❮ Previous
Next ❯

Citations

Nov 17, 2010·Tropical Animal Health and Production·Nma Bida Alhaji
Feb 1, 1975·Australian Veterinary Journal·K L Hughes
Oct 1, 1979·Australian Veterinary Journal·P W LaddsM E Goddard
Feb 5, 2016·The Onderstepoort Journal of Veterinary Research·Nma B AlhajiHu Suk Lee
Jul 1, 1985·Australian Veterinary Journal·F C BaldockA R Lawrence
Sep 9, 2006·Australian Veterinary Journal·D J D BanksE C Molina
Apr 12, 2013·SpringerPlus·Peter Olutope Fayemi, Voster Muchenje
Oct 1, 1988·Australian Veterinary Journal·R L ReeceA W Beattie
Jan 1, 1976·Australian Veterinary Journal·E A Farleigh
Jun 30, 2019·Animals : an Open Access Journal From MDPI·Søren Saxmose NielsenJørgen Steen Agerholm
Aug 28, 2021·Animals : an Open Access Journal From MDPI·Ignaz Zitterer, Peter Paulsen

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.