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Department of Primary Industries and Regional Development, Western Australia

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Articles 211 - 240 of 243

Full-Text Articles in Population Biology

The Esperance Rock Lobster Working Group Interim Report By The Chairman Mr. A. Pallot To The Western Australia Fishing Industry., A. Pallot Nov 1986

The Esperance Rock Lobster Working Group Interim Report By The Chairman Mr. A. Pallot To The Western Australia Fishing Industry., A. Pallot

Fisheries Management Papers

In July 1985 the Minister for Fisheries released a discussion paper titled "Arrangements for entry to all fisheries off and along the Western Australian coast" for consideration by all members of the fishing industry. The Australian Fishing Industry Council (W.A. Branch), now the Western Australian Fishing Industry Council (Inc), responded to the discussion paper in March 1986. The following were included in the Council's recommendations: 1. The rock lobster fishery near Esperance be a limited entry fishery. 2. The bench mark date for determining access by April 30, 1985. 3. that the Minister for fisheries establish a representative Government/Industry Working …


The Windy Harbour-Augusta Rock Lobster Working Group. Interim Report By The Chairman Mr. A. Pallot To The Western Australian Fishing Industry., A. Pallot Nov 1986

The Windy Harbour-Augusta Rock Lobster Working Group. Interim Report By The Chairman Mr. A. Pallot To The Western Australian Fishing Industry., A. Pallot

Fisheries Management Papers

Summary of Recommendations: Boat Access: That the Windy Harbour-Augusta Rock Lobster Fishery be declared a limited entry fishery. That the limited entry fishery related to the taking of Western Rock Lobster (Panulirue cygnus) and Southern Rock Lobster (Jasus novaehollandiae) That the southern boundary of Zone E of the W.C.R.L.F. terminate at a point where it intersects with a line drawn in a southerly direction from the Cape Leeuwin lighthouse. That the eastern boundary remain at Point D'Entrecasteaux (approximately 1160east longitude). That the western and southern boundaries by limits of the Australian Fishing Zone. That the season be for the period …


The Report Of The Fish Farming Legislative Review Committee., P. Rogers Oct 1986

The Report Of The Fish Farming Legislative Review Committee., P. Rogers

Fisheries Management Papers

In 1975, amendments to the Fisheries Act provided for the licensing and control of commercial fish farming activities and , for specific declared species, further controls on their processing and marketing. To date, marron has been the only species to be declared a "farm fish". During the last decade, much of the State's aquaculture impetus has focused on marron although more recently greater attention has been directed towards trout, yabbies and freshwater aquarium fish species. On November 19, 1984, the Marron Growers Association of Western Australia (Inc) wrote to the Minister for Fisheries and Wildlife, seeding a general review of …


The Report Of The Southern Western Australian Shark Working Group., P. Millington Apr 1986

The Report Of The Southern Western Australian Shark Working Group., P. Millington

Fisheries Management Papers

The southern Western Australian Shark Working Group was formed to investigate the southern shark fishery and advise the Minister for Fisheries on options for future management. Membership comprised six fishermen from regional professional fishermen's associations and two Fisheries Department officers. The Working Group considered that each shark fisherman obtaining an entitlement should then be restricted in the length of fishing gear he can use and the number of months he can fish. The individual's time and gear entitlement would be approximately that length of gear being used and time spent fishing in a period shortly before the bench mark date. …


Reproductive Wastage In Sheep, R W. Kelly Jan 1986

Reproductive Wastage In Sheep, R W. Kelly

Journal of the Department of Agriculture, Western Australia, Series 4

The average lambing performance of Western Australia's ewe flock fluctuates between 60 and 70 per cent. Although this level of performance and variation between years is important for the sheep industry, individual farmers are more concerned about performance of their own flocks.

Figure shows the range in lambing performances that exist between farms in this State in 1983-84. The seriously poor performance of many flocks is apparentm - 28 percent of farms had less than 60 per cent lambing. By contrast, 24 farms had performances better than 100 per cent. The reasons for the large differences between farms ( and …


A Survey Of Drench Resistance In Sheep Worms, J R. Edwards, R. Wroth, G. C. De Chaneet, R. B. Besier, J. Karlsson, P. W. Morcombe, D. Roberts, G. Dalton-Morgan Jan 1985

A Survey Of Drench Resistance In Sheep Worms, J R. Edwards, R. Wroth, G. C. De Chaneet, R. B. Besier, J. Karlsson, P. W. Morcombe, D. Roberts, G. Dalton-Morgan

Journal of the Department of Agriculture, Western Australia, Series 4

Sheep worms which are resistant to chemical drenches have been detected with increasing freuency is Western Australia's south-western farming areas between 977 and 1980. These worms have anthelmintic resistance and such genetis resistance puts essential internal parasite control practices at risk.

This prompted veterinarians in the Esperance, Albany, Bunbury, Geraldton and Northam areas to survey farms to determine the prevalence of resistance to drenches and to define those sheep management practices which encourage its development.

This article describes the survey which was conducted to assess the extent of drench resistance, what causes its build-up and how it can be controlled …


Rabbit Kitten Survival In The South-West, D R. King Jan 1984

Rabbit Kitten Survival In The South-West, D R. King

Journal of the Department of Agriculture, Western Australia, Series 4

In the South-West of Western Australis reliable winter rains allow the rabbit breeding season to extend through winter and spring, and thus a large number of kittens are produced each year.

Studies on the biology of rabbits at Cape Naturaliste (270 kilometres south-west of Perth) and Chidlow (40 kilometres east of Perth in the Datling Range) have shown that at these sites each doe produces about 30 and 27 kittens respectively a year. If all these youg rabbits survived, there would be a 15-fold increase in numbers. Within a short time the State would be covered "wall to wall" by …


Rabbits North Of Carnarvon, D R. King Jan 1984

Rabbits North Of Carnarvon, D R. King

Journal of the Department of Agriculture, Western Australia, Series 4

In Westeern Australia rabbits are mainly a pest along the south-western coastal parts of the State, but there are populations north of the Tropic of Capricorn. Rabbits after crossing the Nullarbour plain from South Australia and colonising the South-West of the State, were reported to have reached the west coast near Geraldton by 1912 and then spread northwards.

There is little information on the biologhy of rabbits in the northan parts of their range, but pastoralists in some areas are concerned about erosion and damage to vegetation on their stations when rabbits reach high numbers.

The Agricultural Protection Board undertook …


Keeping Starlings Out Of W.A, John L. Long Jan 1984

Keeping Starlings Out Of W.A, John L. Long

Journal of the Department of Agriculture, Western Australia, Series 4

In Europe and North America huge flocks of starlings cause millions of dollars worth of damage to grain and fruit crops each year and large sums of money are spent trying to control them.

Starlings were introduced into australia in the late 1890s when more than 200 birds were released near Melbourne. They are now well established over much of eastern Australia, ranging from central Queensland, south to Tasmania and along the Great Australian Bight to the South Australian-Western Australian border, occasionally crossing it and sometimes moving as far west as the Esperance region on the south coast.

Some people …


Fisheries Report No 34 - The Status Of The Salt-Water Crocodile In The Glenelg, Prince Regent And Ord River Systems, Kimberley, Western Australia, A. A. Burbidge, H. Messel Jan 1979

Fisheries Report No 34 - The Status Of The Salt-Water Crocodile In The Glenelg, Prince Regent And Ord River Systems, Kimberley, Western Australia, A. A. Burbidge, H. Messel

Fisheries Research Reports

Counts were made of Salt-water Crocodiles (Crocodylus porosus) in the estuarine portions of the Glenelg, Prince Regent and Ord River systems of the Kimberley Division, Western Australia. During the survey 581 crocodiles were seen, including 143 hatchlings. The number of non-hatchling crocodiles in present the Glenelg system is estimated to be 200 to 259, in the Prince Regent 190 to 246 and in the Ord 235 to 306 (95% confidence limits).

The number of non-hatchling crocodiles present in the six Kimberley river systems now counted is estimated to be between 957 and 1243 (95% confidence limits) and we believe that …


The Place For Annual Brome Grass, G W. Anderson Jan 1979

The Place For Annual Brome Grass, G W. Anderson

Journal of the Department of Agriculture, Western Australia, Series 4

Grasses in the anual pastures of southern Australia are particularly important early in the growing season.

The main grass sown, has been annual rygrass, but concerns are emerging with 'annual ryegrass toxicity' and and 'in crop' competition.

This work looks at the role of annual brome grass in pastures.


Learning To Live With Spotted Alfalfa Aphid, M Grimm Jan 1979

Learning To Live With Spotted Alfalfa Aphid, M Grimm

Journal of the Department of Agriculture, Western Australia, Series 4

The spotted alfalfa aphid which can devastate lucerne crops and perhaps also medic pastures, has been established in Western Australia since early 1978. However several methods of control are being developed, which could allow continued production of lucerne.


Biological Control Of Insects On The Ord. 1. Production Of Sitotroga Cerealella For Mass Rearing Of Trichogramma Wasps, M Grimm, P. J. T. Lawrence Jan 1975

Biological Control Of Insects On The Ord. 1. Production Of Sitotroga Cerealella For Mass Rearing Of Trichogramma Wasps, M Grimm, P. J. T. Lawrence

Journal of the Department of Agriculture, Western Australia, Series 4

Department of Agriculture entomologists have developed a technique for the production and collection of eggs of the Angoumois grain moth (Sitotroga cerealella) for mass-rearing the parasitic waspTrichogramma pretiosum Riley.

Trichogramma is giving promising results in trials aimed at developing biological control of insect pests in the Ord River Irrigation Area.


Biological Control Of Heliothis In Sorghum, P J. Michael Jan 1973

Biological Control Of Heliothis In Sorghum, P J. Michael

Journal of the Department of Agriculture, Western Australia, Series 4

This research looks at Biological control of Heiiothis in sorghum, a preliminary report.


Planting And Care Of Trees In The Wheatbelt, F Batini Jan 1971

Planting And Care Of Trees In The Wheatbelt, F Batini

Journal of the Department of Agriculture, Western Australia, Series 4

THE climate of South Western Australia includes a long summer drought which subjects trees to considerable moisture stress.

Shade trees and shelter belts can be established successfully in the wheatbelt without hand watering, provided a suitable site and variety of tree is selected and a little time is spent in site preparation and care of the young tree.

This article, which is adapted from a Forests Department publication "Catalogue of Trees for growing under Western Australian conditions", sets out the best varieties of trees and establishment methods.


Mating Weaners Does Not Affect Future Ewe Performance, R J. Suiter, K. P. Croker Jan 1970

Mating Weaners Does Not Affect Future Ewe Performance, R J. Suiter, K. P. Croker

Journal of the Department of Agriculture, Western Australia, Series 4

Maiden ewes in Western Australia are usually mated in their second year because of supposed ill-effects of earlier mating on the ewe's future production. Mating at a younger age however, providing there was no reduction in future performance, would provide for an extra lamb drop and thus increase the lifetime output of ewes.

Information from various sources indicated that weaners could be successfully mated providing their bodyweights were satisfactory. This trial was carried out to test the results of mating weaners under Western Australian conditions.


Control Of Weeds In Garden Areas, Geoffrey A. Pearce Jan 1967

Control Of Weeds In Garden Areas, Geoffrey A. Pearce

Journal of the Department of Agriculture, Western Australia, Series 4

THE present-day gardener does not appear to relish the tedious job of removing weeds by hand. It is a never-ending task and no sooner is one germination controlled than another appears.

Modern herbicides provide a ready answer for overcoming the weed problem in the home garden, but it is essential to select the correct chemical and to understand its limitations.


Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia Jan 1967

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 Jan 1967

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.


Special Field Days For Merino Breeders, Department Of Agriculture, Western Australia Jan 1967

Special Field Days For Merino Breeders, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

More than 200 Merino stud breeders attended special stud breeding and fertility field days arranged for them by the Department of Agriculture recently.

Breeders attending represented some 40 per cent of the State's Merino studs.


Department Of Agriculture Services : The Botany Branch And The W.A. Herbarium, Department Of Agriculture, Western Australia Jan 1967

Department Of Agriculture Services : The Botany Branch And The W.A. Herbarium, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

ALTHOUGH the flora of Western Australia strongly attracted early botanists and collectors, it was virtually neglected by settlers faced with a century or more of hard pioneering.

Only recently has enthusiasm for our remarkable flora developed within the State and, with the formation of sponsoring societies and the establishment of the Kings Park Botanic Gardens, native species have become popular in home and civic gardens.


Ornamental Trees For The Farm Garden, P Luff Jan 1967

Ornamental Trees For The Farm Garden, P Luff

Journal of the Department of Agriculture, Western Australia, Series 4

THE need for trees in the farm garden is being realized by many people.

Trees around the homestead are required to give such features as shade, colour, fragrance and many other advantages to generally make an area more livable.

Besides these advantages, trees appear to help smaller plants flourish by increasing the humidity and providing various degrees of shade and sunlight.


Poultry Behaviour As It Affects Management, R H. Morris Jan 1967

Poultry Behaviour As It Affects Management, R H. Morris

Journal of the Department of Agriculture, Western Australia, Series 4

UNDER natural conditions animals have considerable control over their movements and over their proximity to each other.

Today, however, there is a trend in animal husbandry towards greater intensificaton, and this is most evident in the poultry industry.


Tenth Random Sample Laying Test, 1966-67 : Litter, Department Of Agriculture, Western Australia Jan 1967

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.


An Assessment Of Cattle Husbandry Problems In Western Australia, W J O Wilkie Jan 1964

An Assessment Of Cattle Husbandry Problems In Western Australia, W J O Wilkie

Journal of the Department of Agriculture, Western Australia, Series 4

THE science of animal husbandry deals with all those things which affect the welfare and productivity of our domestic animals.

The relative emphasis placed on welfare and productivity depends on whether the animals are kept as pets or for profit.


The Sparrow Invasion Of 1962, C D. Gooding, C. R. Walton Jan 1963

The Sparrow Invasion Of 1962, C D. Gooding, C. R. Walton

Journal of the Department of Agriculture, Western Australia, Series 4

During late 1962 and early 1963, a report that sparrows were at large in the metropolitan area close to Perth drew intense public interest.

This article gives some facts about the reported sightings.


The Webworm. 1. The Webworm In Its Natural Environment, J A. Button Jan 1963

The Webworm. 1. The Webworm In Its Natural Environment, J A. Button

Journal of the Department of Agriculture, Western Australia, Series 4

MANY farmers are concerned about the apparent increase in webworm numbers in recent years.

It has been suggested that the problem is now more widespread and the outbreaks more regular than a few years ago.


Spraying For Grasshopper Control, T J. Tozer Jan 1963

Spraying For Grasshopper Control, T J. Tozer

Journal of the Department of Agriculture, Western Australia, Series 4

A BIG increase in cereal growing in the "hopper" belt has brought a general improvement in the grasshopper situation over the past few years.

This highlights the emphasis entomologists have placed on cultivation as the best known way of controlling grasshoppers.


Rabbit Fumigation, C D. Gooding Jan 1963

Rabbit Fumigation, C D. Gooding

Journal of the Department of Agriculture, Western Australia, Series 4

Not all poisons act by absorption from the alimentary tract or through the skin, the fumigants are a big group of poisons used in pest control which act on the animal after being absorbed through the lungs.

FUMIGATION as it is now used in Western Australia is not always an economical way of treating whole farm properties. It should only be used on its own in areas where it is impossible to use other more permanent methods such as warren destruction.


Grazing To Control Pasture Composition, R A. Bettenay Jan 1962

Grazing To Control Pasture Composition, R A. Bettenay

Journal of the Department of Agriculture, Western Australia, Series 4

APART from grazing management, there are a number of means by which the farmer can influence pasture composition.

With the exception of grazing, all of these processes involve recurring costs, so it is important to exert the utmost possible control through the grazing animal.