Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Publication Year
- Publication
- Publication Type
Articles 1 - 30 of 44
Full-Text Articles in Entire DC Network
Use Of Amino Acid Isotope Analysis To Investigate Capital Versus Income Breeding Strategies In Migratory Avian Species, Nico Lübcker, John P. Whiteman, Oliver N. Shipley, Keith A. Hobson, Seth D. Newsome
Use Of Amino Acid Isotope Analysis To Investigate Capital Versus Income Breeding Strategies In Migratory Avian Species, Nico Lübcker, John P. Whiteman, Oliver N. Shipley, Keith A. Hobson, Seth D. Newsome
Biological Sciences Faculty Publications
1. Income and capital breeding represent opposing ends of a continuum of reproductive strategies. Quantifying nutrient allocation to reproduction is challenging, but recent advances in compound-specific stable isotope analysis hold promise for tracing the source of individual compounds allocated to reproduction.
2. Here, we describe a novel approach of using measured carbon (δ13C) and nitrogen (δ15N) isotope values of individual amino acids (AAs) in pectoral muscle of egg-laying females and egg yolk as a useful tool to quantify the reliance on income versus capital breeding in migrating species. We used white-fronted (Anser albifrons frontalis), lesser snow (A. …
Laying Performance Of Pearl Gray Guinea Fowl Hens As Affected By Caging Density, Samuel N. Nahashon, Nathaniel Adefope, Abravi Amenyenu, D. Wright
Laying Performance Of Pearl Gray Guinea Fowl Hens As Affected By Caging Density, Samuel N. Nahashon, Nathaniel Adefope, Abravi Amenyenu, D. Wright
Agricultural and Environmental Sciences Faculty Research
The caging density required for optimal egg production by various avian species and varieties is highly variable. Even so, little is known of the required cage density for optimum performance of the laying guinea fowl (Numida meleagris). The objective of this study was to assess the effect of varying cage densities on production performance of pearl gray guinea fowl laying hens. In 3 replicates, 270 pearl gray guinea hens [28 wk of age (WOA)] were weighed individually and randomly assigned to laying cages at densities of 1, 2, and 3 birds/cage, equivalent to 1,394, 697, and 465 cm2/bird, respectively. During …
A Comparison Of The Welfare Of Hens In Battery Cages And Alternative Systems, Sara Shields, Ian J.H. Duncan
A Comparison Of The Welfare Of Hens In Battery Cages And Alternative Systems, Sara Shields, Ian J.H. Duncan
Sara Shields, PhD
Housing systems for egg-laying hens range from small, pasture-based flocks to large, commercial-scale operations that intensively confine tens of thousands of hens indoors. The overwhelming majority of laying hens used for commercial egg production in the United States are confined in battery cages and provided 432.3 cm2 (67 in2) of space per bird. Cages prevent hens from performing the bulk of their natural behavior, including nesting, perching, dustbathing, scratching, foraging, exercising, running, jumping, flying, stretching, wingflapping, and freely walking. Cages also lead to severe disuse osteoporosis due to lack of exercise. Alternative, cage-free systems allow hens to move freely through …
The Effect Of Calcium And Nonphytate Phosphorus On Chicken Genetic Line, Egg Production, Shell Quality, Bone Homeostasis, And Progeny Bone Quality, Phiphob Sodsee
Graduate Theses and Dissertations
The study consisted of two parts to determine effects of dietary calcium (Ca) and nonphytate phosphorus (NPP) level on four pure genetic lines of broiler breeders. The first part was concentrated on body composition, egg production and shell quality changes according to diet and genetic line. The second part was the study of bone homeostasis variables combining hematology, bone histology and body composition changes according to diet and genetic line. In the study, pullets (246 from each of pure genetic line A, B, C and D) were individually caged and light stimulated at 21 weeks of age. The study duration …
Review Of Random Sample Egg Laying Tests In W.A. - 1957 To 1975, R J. Bishop
Review Of Random Sample Egg Laying Tests In W.A. - 1957 To 1975, R J. Bishop
Bulletins 4000 -
The First W.A. Random Sample Laying Test commenced at the Poultry Research Station, Herdsman Lake in 1957. Every year since that date to 1975 a new test has been conducted up to the Eighteenth Test, which was the last test conducted by the Department of Agriculture. The purpose of this review is to analyse the results of the tests over the years to determine whether the breeds entered in the tests and which are available commercially in this State have made progress. However, before proceeding with the detailed analysis of the test results, an outline of the changes that have …
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
SLXTH PROGRESSIVE REPORT TO 1st NOVEMBER, 1970 AVERAGE AGE OF BIRDS 459 DAYS OR 66 WEEKS
POULTRY RESEARCH STATION, WEMBLEY
FINAL REPORT TO 500 DAYS
Fourteenth Random Sample Laying Test : 1970-71, Department Of Agriculture, Western Australia
Fourteenth Random Sample Laying Test : 1970-71, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
THIRD PROGRESSIVE REPORT TO 2nd MAY, 1971 AVERAGE AGE OF BIRDS 278 DAYS OR 39 WEEKS AND 5 DAYS and
FOURTH PROGRESSIVE REPORT TO 30ft MAY, 1971 AVERAGE AGE OF BIRDS 306 DAYS OR 43 WEEKS AND 5 DAYS
Fourteenth Random Sample Laying Test : 1970-71, Department Of Agriculture, Western Australia
Fourteenth Random Sample Laying Test : 1970-71, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
FIFTH PROGRESSIVE REPORT TO 29th AUGUST, 1971 AVERAGE AGE OF BIRDS. 397 DAYS, OR 57 WEEKS
Fourteenth Random Sample Laying Test : 1970-71, Department Of Agriculture, Western Australia
Fourteenth Random Sample Laying Test : 1970-71, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
POULTRY RESEARCH STATION, WEMBLEY REARING RESULTS AT HOUSING (21 WEEKS AND 3 DAYS) and
SECOND PROGRESSIVE REPORT TO 28th FEBRUARY, 1971 AVERAGE AGE OF BIRDS 214 DAYS OR 30 WEEKS AND 4 DAYS
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
THIRTEENTH RANDOM SAMPLE LAYING TEST, 1969-70
SECOND PROGRESSIVE REPORT TO 1st MARCH, 1970 Average age of birds 215 days or 30 weeks and 5 days
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
POULTRY RESEARCH STATION, WEMBLEY FIFTH PROGRESSIVE REPORT TO 30th AUGUST, 1970
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Thirteenth Random Sample Laying Test : 1969-70, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
FOURTH PROGRESSIVE REPORT TO 31 sr MAY, 1970
Average age of birds 305 days or 43 weeks and 4 days
Twelfth Random Sample Laying Test : 1968-69 : Cages, Department Of Agriculture, Western Australia
Twelfth Random Sample Laying Test : 1968-69 : Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TWELFTH RANDOM SAMPLE LAYING TEST,
1968-69 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
SECOND PROGRESSIVE REPORT TO 2nd MARCH, 1969
Eleventh Random Sample Laying Test : 1967-68 Cages, Department Of Agriculture, Western Australia
Eleventh Random Sample Laying Test : 1967-68 Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
ELEVENTH RANDOM SAMPLE LAYING TEST,
1967-68 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
SIXTH PROGRESSIVE REPORT TO 3rd NOVEMBER, 1968
Twelfth Random Sample Laying Test : 1968-1969 : Litter, Department Of Agriculture, Western Australia
Twelfth Random Sample Laying Test : 1968-1969 : Litter, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TWELFTH RANDOM SAMPLE LAYING TEST,
1968-69-LITTER
POULTRY RESEARCH STATION, WEMBLEY
THIRD PROGRESSIVE REPORT TO 4th MAY, 1969
Twelfth Random Sample Laying Test : 1968-69 : Cages, Department Of Agriculture, Western Australia
Twelfth Random Sample Laying Test : 1968-69 : Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TWELFTH RANDOM SAMPLE LAYING TEST, 1968-69 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
FOURTH PROGRESSIVE REPORT TO 1st JUNE, 1969 Average age of birds 308 days or 44 weeks.
Entering The Egg Industry With Laying Cages, W Ward
Entering The Egg Industry With Laying Cages, W Ward
Journal of the Department of Agriculture, Western Australia, Series 4
DEPARTMENT of Agriculture Bulletin 3579, "Entering the Egg Industry with Laying Cages", by W. Ward, examines various aspects of the cage system of housing laying hens.
This system is by far the most popular method of housing layers, with 90 per cent, of new farms using cages and many daep litter farms now converting to cages.
Eleventh Random Sample Laying Tests, 1967-68 : Cages, Department Of Agriculture, Western Australia
Eleventh Random Sample Laying Tests, 1967-68 : Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
ELEVENTH RANDOM SAMPLE LAYING TEST, 1967-68 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
FOURTH PROGRESSIVE REPORT TO 2nd JUNE, 1968
Tenth Random Sample Laying Test, 1966-67 : Litter, Department Of Agriculture, Western Australia
Tenth Random Sample Laying Test, 1966-67 : Litter, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TENTH RANDOM SAMPLE LAYING TEST, 1966-67 - LITTER
POULTRY RESEARCH STATION, WEMBLEY
SECOND PROGRESSIVE REPORT TO 26th FEBRUARY,1967
Average age of birds 215.5 days or 30 weeks and 6 days.
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
NINTH RANDOM SAMPLE LAYING TEST, 1965-66
POULTRY RESEARCH STATION, WEMBLEY
FINAL REPORT TO 500 DAYS
Tenth Random Sample Laying Test, 1966-67 : Cages, Department Of Agriculture, Western Australia
Tenth Random Sample Laying Test, 1966-67 : Cages, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
TENTH RANDOM SAMPLE LAYING TEST, 1966-67 - CAGES
POULTRY RESEARCH STATION, WEMBLEY
SECOND PROGRESSIVE REPORT TO 26th FEBRUARY, 1967
Average age of birds 215.5 days or 30 weeks and 6 days.
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
NINTH RANDOM SAMPLE LAYING TEST, 1965-66 POULTRY RESEARCH STATION, WEMBLEY
REARING RESULTS AT HOUSING (21 WEEKS AND 3 DAYS)
SECOND PROGRESSIVE REPORT TO 27th FEBRUARY, 1966
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65
SIXTH PROGRESSIVE REPORT TO 31st OCTOBER, 1965
Eighth Random Sample Laying Test, 1964-65 : Third Progressive Report To 2nd May, 1965, Department Of Agriculture, Western Australia
Eighth Random Sample Laying Test, 1964-65 : Third Progressive Report To 2nd May, 1965, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65
THIRD PROGRESSIVE REPORT TO 2nd MAY, 1965
Average age of birds 276 days or 39 weeks and 3 days.
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65
FIFTH PROGRESSIVE REPORT TO 29th AUGUST. 1965
Final Report : Sixth (1962-63) Western Australian Random Sample Laying Test, R H. Morris, F. A. E. Hunt
Final Report : Sixth (1962-63) Western Australian Random Sample Laying Test, R H. Morris, F. A. E. Hunt
Journal of the Department of Agriculture, Western Australia, Series 4
FINAL REPORT SIXTH (1962-63) WESTERN AUSTRALIAN RANDOM SAMPLE LAYING TEST
Final Report to December, 1963, covering a period of 500 days (71 3/7 weeks), comprising a 150-day (21 3/7 week) rearing period and a 350-day (50-week) laying period.
Seventh Random Sample Laying Test 1963-64 : Poultry Research Station, Wembley : Third Progressive Report O 26th April, 1964, Department Of Agriculture, Western Australia
Seventh Random Sample Laying Test 1963-64 : Poultry Research Station, Wembley : Third Progressive Report O 26th April, 1964, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
SEVENTH RANDOM SAMPLE LAYING TEST, 1963-6
4 POULTRY RESEARCH STATION, WEMBLEY
THIRD PROGRESSIVE REPORT TO 26th APRIL, 1964
Average age of birds 276 days or 39 weeks and 3 days.
Seventh Random Sample Laying Test : 1963-64 : Poultry Research Station, Wembley : Fourth Progressive Report To 31st May, 1964, Department Of Agriculture, Western Australia
Seventh Random Sample Laying Test : 1963-64 : Poultry Research Station, Wembley : Fourth Progressive Report To 31st May, 1964, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
SEVENTH RANDOM SAMPLE LAYING TEST, 1963-64
POULTRY RESEARCH STATION, WEMBLEY
FOURTH PROGRESSIVE REPORT TO 31st MAY, 1964
Average age of birds 308 days or 44 weeks and 1 day.
First Three Year Average Report For The West Australian Random Sample Laying Test Covering The 4th, 5th And 6th Tests, Department Of Agriculture, Western Australia
First Three Year Average Report For The West Australian Random Sample Laying Test Covering The 4th, 5th And 6th Tests, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
FIRST THREE-YEAR-AVERAGE REPORT FOR THE WEST AUSTRALIAN RANDOM SAMPLE LAYING TEST COVERING THE 4th, 5th AND 6th TESTS
Despite every effort made to provide all entries in individual tests with a uniform environment it is still possible for a particular entry's performance not to be a true indication of its inherent ability.
Random Sample Test results should therefore be viewed on a long term, annual, consecutive basis. If the yearly results for a given hatchery are grouped together and averaged over a period of several years irregularities in performance due to factors other than genetic worth are minimised and a …
Sixth Random Sample Laying Test : 1962-63, Department Of Agriculture, Western Australia
Sixth Random Sample Laying Test : 1962-63, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
SIXTH RANDOM SAMPLE LAYING TEST, 1962-63
POULTRY RESEARCH STATION, WEMBLEY
PROGRESSIVE REPORT TO 3rd MARCH. 1963,
FOR 10 WEEK LAYING PERIOD FROM 21 WEEKS AND 3 DAYS