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Full-Text Articles in Physical Sciences and Mathematics

Management Measures For The Shark Bay Snapper Fishery 1987 Season., P. Millington Nov 1986

Management Measures For The Shark Bay Snapper Fishery 1987 Season., P. Millington

Fisheries management papers

The 1986 Shark Bay snapper fishing season mirrored in almost all respects the situation which will apply when the limited entry regime is put into effect. It was thus an opportunity to assess how effective the measures recommended in the Report of the Shark Bay Snapper Fishery Working Group were in reducing effort in the fishery.


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 ...


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 ...


The Significance Of Clutch Size, Egg Coloration, And Other Reproductive Traits Of Mourning Doves , David Andrew Westmoreland Jan 1986

The Significance Of Clutch Size, Egg Coloration, And Other Reproductive Traits Of Mourning Doves , David Andrew Westmoreland

Retrospective Theses and Dissertations

The mourning dove (Zenaida macroura) is one of the most successful avian species in North America. In this study, I identified adaptations that promote multiple brooding, one characteristic of the unique reproductive strategy of mourning doves. I also investigated how clutch size and egg coloration affect reproductive success;Mourning doves are capable of multiple brooding because they produce food (crop milk) for nestlings in vivo and feed older nestlings a diverse granivorous diet. This allows extended breeding seasons. Mourning doves also have adaptations that enhance the number of broods that can be produced in a season. By constructing small nests ...


Avian Ecological Studies In A Sagebrush Community: Bird Responses To Fire And Territory Dynamics In A Sparrow Population , Kenneth Lee Petersen Jan 1986

Avian Ecological Studies In A Sagebrush Community: Bird Responses To Fire And Territory Dynamics In A Sparrow Population , Kenneth Lee Petersen

Retrospective Theses and Dissertations

In 1980-1985, I documented the responses of nongame birds to a prescribed fire in an Idaho sagebrush (Artemisia spp.) community, and I tested the hypothesis that territory shifts by sage sparrows (Amphispiza belli) represented adaptive adjustments in site use. The burn was incomplete (45%) but altered major components of the vegetation. Burned plots supported 1 more bird species than controls, and although total bird densities declined the year after fire, they were greater on burned plots than on controls by the fourth postburn year. Sage sparrow numbers were unaffected by fire; Brewer's sparrow (Spizella breweri) numbers declined in the ...


Late Prehistoric And Protohistoric Large Mammal Zoogeography Of Virginia, Robert K. Rose Jan 1986

Late Prehistoric And Protohistoric Large Mammal Zoogeography Of Virginia, Robert K. Rose

Biological Sciences Faculty Publications

Evidence derived from18late prehistoric (middle and late Woodland Period) archeological sites, from several early historical accounts, and from the current understanding of the distribution of Virginia mammals indicates that the large mammal fauna of the Commonwealth has not changed substantially within the past 4,000 yrs. Some species (e.g., bison, elk, timber wolf, and mountain lion) have been extirpated since the settlement of Virginia by Europeans; some previously extirpated species (e.g., porcupine, coyote, and beaver) have been naturally or artificially reintroduced during the historical period, and others (e.g., woodchuck and red fox) probably have expanded their distributions ...


The York River: A Brief Review Of Its Physical, Chemical And Biological Characteristics, Michael E. Bender Jan 1986

The York River: A Brief Review Of Its Physical, Chemical And Biological Characteristics, Michael E. Bender

Reports

The purpose of this paper is to provide an overview of the physical, chemical and biological characteristics of the York River, Virginia. The river is formed by the confluence of the Mattaponi and Pamunkey rivers at West Point, Virginia. It is tidal over its entire length and flows to the western shore of Chesapeake Bay.