Ecology and Evolutionary Biology Commons^™

Temporal And Spatial Patterns Of Abundance Of Age 0 Threadfin Shad (Dorosoma Petenense) In Overton Arm, Lake Mead, William Lee Pelle

Publications (WR)

Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of a larger, game fishery enhancement study (Lake Mead Fertilization Project), designed to assess feasability of increasing survivorship of larval/juvenile shad by boosting phosphate levels, thereby increasing algal and zooplankton biomass, during the shad spawning period. Shad are the primary forage base for the striped bass (Morone saxatilis) and black bass (Macropterus salmoides) fisheries. Weekly samples were …

Management Of The Perth Metropolitan Purse-Seine Fishery., N. Moore

Fisheries Management Papers

This report outlines the management plan for the limited entry purse-seine fishery for small pelagic fish in coastal waters between Lancelin and Cape Bouvard and seaward to the 200 mile limit of the Australian Fishing Zone. The plan includes Cockburn Sound.

A Review Of The Shark Bay Pearling Industry., D. A. Hancock

Fisheries Management Papers

While there are currently only two pearl culture leases in Shark Bay, two new applications for leases have already been received by the W.A. Fisheries Department. Increased interest is being generated about pearl culture in Shark Bay, which will need to be considered against the background of management plans designed to restrict further entry into other areas, notably the pearly industry of W.A from Exmouth Gulf northwards, and the pearling industry of the Northern Territory. Recent successes with pearl culture in both those areas, and the greatly increased revenues and high lease transfer values realised, must inevitably focus interest on …

Red Swamp Crayfish Ecology In Lake Mead, Suzanne E. Leavitt, Jennifer Stephens Haley, Mikell Hager, Donald H. Baepler, Nevada Department Of Wildlife

Publications (WR)

Red swamp crayfish (Procambarus clarkii) were trapped in Flamingo Wash, an urban wash of Las Vegas, during four periods of 1988. Life history and reproductive success were determined. The trapped crayfish were marked and released into a study cove in Lake Mead as part of an experimental stocking program. Retrap data from the study cove were used to determine life history, habitat preferences, and movement patterns of the stocked crayfish. In addition, a literature search was done on red swamp crayfish ecology, including food preferences, life history, habitat preferences and fish predation.

Fisheries Management Paper No.23 - Management Of The South-West Inshore Trawl Fishery., N. Moore

Fisheries Management Papers

This report outlines the management plan for the south west inshore trawl fishery which already operates in coastal waters less than 200 metres deep between Guilderton and Cape Leeuwin.

This management plan takes into account these important concerns and has specifically set aside a strip of coastal area from Cape Bouvard to Cape Leeuwin for recreational usage and for protection of the benthic community, and closed the management zone north of Burns Beach to trawling.

A Report On Marron Fishing In Western Australia., Doug Wenn

Fisheries Management Papers

The marroning experience is one enjoyed by many Western Australians. A rapid increase in fishing effort evidenced by the increase in number of recreational fishing licences issued, combined with low rainfall in the last few years resulted in a dramatic reduction of marron catch rates during 1986/87. In view of the state of marron stocks, the Minister for Fisheries considered it appropriate to close the 1987/88 marron season.

Fisheries Management Paper No. 21 - Commercial Fishing Licensing In Western Australia., Fisheries Department Of Western Australia.

Fisheries Management Papers

The purpose of this paper is to provide those in the fishing industry, as well as those planning to enter the industry, with a statement on the policies on boat licences, boat replacements and transfers, limited and restricted entry licences and licence splitting as they apply to the fisheries managed under the Western Australian Fisheries Act. The pearling industry, which is managed under another Act, is not included.

Rock Lobster Industry Advisory Committee Report To The Minister For Fisheries., Rock Lobster Industry Advisory Committee

Fisheries Management Papers

The total catch of about 12.1 million kilograms for the 1987/88 season, based on processor returns, was an increase of 44% on the 1986/87 season. This very high catch, the third highest on record, resulted from an above average perulus settlement in 1983/84 and a "flow-on" of fast growing animals stemming from the expected high recruitment in 1988/990 caught as "reds" in 1987/88.

The Committee has identified five major elements related to the state of the rock lobster fishery upon which management advice is considered.

a) The undersize fraction of the population.

b) The "whites" which provide a significant proportion …

Temporal And Spatial Variation In Pelagic Fish Abundance In Lake Mead Determined From Echograms, Gene R. Wilde, Larry J. Paulson

Publications (WR)

Echograms have been used extensively to locate and estimate the relative abundance of marine fish stocks (Cushing 1973). In freshwater, echograms have been used to describe vertical (Netsch et al. 1971; Eggers 1978; O'Brien et al. 1984; Matthews et al. 1985), spatial (O'Brien et al. 1984; Wanjala et al. 1986) and temporal (Baker and Paulson 1983) patterns in fish abundance. Although most uses of echograms have been qualitative, Mullan and Applegate (1969) and Matthews et al. (1985) obtained relative estimates of fish abundance by counting targets (fish) on echograms. However, neither Mullan and Applegate (1969) nor Matthews et al. (1985) …

A Review Of The Pacific Members Of The Gobiid Fish Genus Bollmannia Jordan, Robin L. Bedenbaugh

Biological Sciences Theses & Dissertations

The Pacific members of the genus Bollmannia Jordan 1890 comprise seven species of gobies distributed from Baja California to Peru and west to the Galapagos Archipelago.

Previous authors recognized nine nominal species, all known only from their brief original accounts. Those accounts do not allow for proper discrimination of the species. All nominal species were re­ examined using meristic, morphometric, and pigment-pattern characteristics. Three of the nine nominal species are herein considered synonymous with previously described forms. The six valid nominal species are redescribed, a new species is described, and a key and illustrations are provided for the seven valid …

Fisheries Management Paper No. 15 - Draft Management Plan For The Control Of Barramundi Gillnet Fishing In The Kimberley., R. S. Brown

Fisheries Management Papers

This management plan sets out a number of options for the control of commercial gillnet fishing for barramundi in the Kimberley. the plan focuses on existing commercial fishery, and on the fishermen consulted during the process of developing these management arrangements. However, the barramundi stocks of the region are increasingly exploited by large numbers of both local and tourist recreational fishermen whose needs must also be catered for. Because recreational fishermen are not easily identified or contacted as a group, I have endeavoured in this foreword, to set out the management options which best take into account the future needs …

Economics And Marketing Of Western Australia Pilchards., Scp Fisheries Consultants Pty Ltd

Fisheries Management Papers

The 1986/87 Australian catch was about 8,300 tonnes. At present levels of fishing,it has been suggested that this could be substantially increased. The fishery is not in danger of over-exploitation. Rather, the problem could be that there is more fish available than existing markets could absorb. However, there are prospects for increasing the present volume of fish sold domestically and for developing new products and markets in Australia and overseas.

Characterization Of The Aquatic Environment In Lake Mead Near The Proposed Spring Canyon Pumped-Storage Project, And Assessment Of Potential Aquatic Impacts, Charles R. Liston, Stephen J. Grabowski, Bureau Of Reclamation

Publications (WR)

A pumped storage system consists of an upper reservoir and lower reservoir separated by an elevation difference. During low demand energy periods such as nights and weekends water is pumped from the lower to the upper reservoir using available energy from conventional steam electric power plants. During high energy demand periods, such as mornings and afternoons of weekdays, upper reservoir water is allowed to drop back down through the same system of water conduits and turbines, generating electricity to conveniently meet abrupt electrical energy requirements. The same water turbines thus act both as pumps and as conventional hydroelectric turbines. Because …

Age And Growth Of The Tautog, Tautoga Onitis (Pisces: Labridae), From Lower Chesapeake Bay And Coastal Waters Of Virginia, E. Brian Hostetter

Biological Sciences Theses & Dissertations

The tautog, Tautoga onitis (Pisces: Labridae), is rapidly gaining popularity in Virginia by anglers, spearfishermen and specialized commercial interests. In Virginia, tautog are seasonally abundant on hard bottom substrates in nearshore (ca. 2-10 m) habitats and inhabit offshore wrecks and reef areas (ca. 10-30 m) year round. Habitat restriction and slow growth of the species coupled with recent technological advances in marine electronics which simplify locating tautog populations by user groups may contribute to overexploitation of tautog within the region.

Tautog were collected over a two year period from the lower Chesapeake Bay and nearshore waters of the Atlantic Ocean …

Draft Management Plan For The Perth Metropolitan Purse Seine Fishery, P. Millington

Fisheries Management Papers

As part of a development strategy for inshore purse seine fishing along the Western Australian coast this plan proposes management measures for the purse seine fishing boats operating along the coast near the greater Perth Metropolitan area. Using as a basis the restricted entry Cockburn sound purse seine fishery, the plan proposes the introduction of a limited entry regime for inshore purse seine fishing between Lancelin to just south of Mandurah. This regime will permit management of the available pelagic fish stocks in the area and also protect the economic position of the existing participants by providing an environment for …

Final Report Of The Pearling Industry Review Committee To The Hon. Julian Grill, Western Australian Minister For Fisheries And Hon. John Kerin, M.P. Federal Minister For Primary Industries And Energy., F. J. Malone, D. A. Hancock, B. Jeffries

Fisheries Management Papers

In October 1987 an Interim Report was issued to enable the present licence holders, the Licensed Pearl Producers' Association and other who had expressed an interest to the Committee, to consider the interim recommendations and , if necessary, make written comment to the Committee.

The Committee considered the comments it received. It now presents its Final Report to the Western Australian Minister for Fisheries, the Hon. Julian Grill and the Federal Minister for Primary Industries and Energy, the Hon. John Kerin.

The Committee is recommending that the industry be quota controlled with entry by transfer only. The present licence holders …

Fisheries Report No 80 - Potential For The Development Of A Tuna Industry In North West Australian Waters, J. P. Robins

Fisheries Research Reports

Information available on the abundance of tuna off north west Australia, gathered on surveys by both ship and aircraft, the presented in order to identify opportunities for the sourcing of raw material for the Western Australian tuna canning industry. Identification of the constraints and potential for industry development of these resources is made focusing on the area considered most favourable, types of vessels used, fishing methods and strategies required for the development of such resources in the event that there is some identified prospect of viable commercial development.

The South West Trawl Fishery Draft Management Plan., P. J. Millington

Fisheries Management Papers

This paper outlines a proposal for management of trawl fisheries operating in waters less than 200m deep between the Moore River north of Perth and Cape Leeuwin. Off Fremantle, potential and actual user conflicts between trawling and the requirements of recreational fishing and other forms of commercial fishing point to the need to gradually phase out trawling in this area. A limited entry fishery, with no licence transferability, is therefore proposed.

Sport Fishing For Marron In Western Australia - Management For The Future : A Discussion Paper On Management Options For The Marron Fishery., Fisheries Department Of Western Australia.

Fisheries Management Papers

The number of marron that may be caught each year without seriously jeopardising the long term future of fishery is limited. The situation deteriorated still further after another winter of low rainfall in 1987 and as the 1987-88 summer drew closer it became doubtful whether the State's marron stocks could withstand another season of hard fishing pressure. Thus, it was considered necessary to ban all fishing for marron during the 1987-88 season. This discussion paper has been prepared to help start the ball rolling in the right direction, and ensure any measures taken to safeguard the fishery are backed up …

Fisheries Management Paper No. 22 - Economics And Marketing Of Western Australian Pilchards., Scp Fisheries Consultants Pty Ltd

Fisheries Management Papers

Most of the Western Australian pilchard catch comes from King George Sound and from the southern coast off Albany where the number of vessels allowed to catch has been controlled. Prospects for increasing production in this area are limited. However, there are indications that considerable quantities of pilchards could be caught in waters to the east and west of Albany, in the inshore declared purse seine development zone.

Before allowing fisherman to catch more pilchards in these waters, the Western Australian Government decided that an investigation should be undertaken of the Australian pilchard resources, the domestic and export market situation …

Fish Aid: The Lake Mead Fertilization Project, Richard Axler, Larry Paulson, Peter Vaux, Patrick Sollberger, Donald H. Baepler

Publications (WR)

Sport fishing at Lake Mead in Nevada and Arizona is a resource valued at nearly $100 million per year to southern Nevada. During the past two decades, salmonids, mostly trout, have disappeared entirely, the largemouth bass catch has drastically declined despite greater fishing pressure, and the condition factors for striped bass have steadily deteriorated. It appears that a major reduction in phosphorus loading caused by the upstream impoundment of the Colorado River to form Lake Powell in 1963 and advanced wastewater treatment removal of phosphorus from domestic wastewater inflows in 1981 are the principal factors responsible for decreased production at …

A Development Plan For The South Coast Inshore Trawl Fishery, Fisheries Department Of Western Australia

Fisheries Management Papers

In March 1986 discussions were commenced between officers of the Fisheries Department and the Australian Fisheries Service concerning management measures for trawl fishery in the Great Australian Bight. These measures were considered necessary as a Western Australian Company (Toskel Fishing Co.) had commenced fishing the area. Given the excess fishing capacity in other Australian trawl fisheries it was considered advisable to institute management at an early stage and control development of this deep water fishery. Concurrent with these developments, mainly directed towards the control of larger trawlers in deeper waters, several small Western Australian trawlers operating out of Esperance and …

Lake Mead Prefertilization Study: Preliminary Nutrient Enhancement Studies In Lake Mead, Richard P. Axler, Larry J. Paulson, Patrick J. Sollberger, Donald H. Baepler, U.S. Bureau Of Reclamation

Publications (WR)

Studies conducted by the University of Nevada-Las Vegas (UNLV), the Nevada Department of Wildlife (NDOW), the Arizona Game and Fish Department (AGFD), The Nevada Division of Environmental Protection (NDEP), and the United States Bureau of Reclamation (USBR) have identified decreased algal production as a major factor involved in the decline of the Lake Mead sport fishery. Phosphorus-laden silt particles in the Colorado River have been sedimenting out in Lake Powell since the completion of Glen Canyon Dam 286 miles upstream in 1963. This sharp decrease in phosphorus loading to Lake Mead (>5000 tons per year) has resulted in decreased …

Thermal Tolerances And Preferences Of Fishes Of The Virgin River System (Utah, Arizona, Nevada), James E. Deacon, Paul B. Schumann, Edward L. Stuenkel

Publications (WR)

Critical thermal maxima (CTM) and thermal preferenda of the common fishes of the Virgin River were examined. Differences in final temperature preferenda and CTM for species with low thermal lability (speckled dace, spinedace, roundtail chub) correspond well with differences in their distribution and abundance in the river. These species shifted their acute thermal preferences relatively little as acclimation temperature increased. For thermally labile species (woundfin, red shiner, desert sucker, and fiannehnouth sucker), the final preferendum is a less precise indicator of probable distribution. The woundfin, an endangered fish, has a high CTM (39.5 C at 25 C acclimation) and a …

Report Of The Rock Lobster Industry Advisory Committee To The Hon. Minister For Fisheries., Rock Lobster Industry Advisory Committee

Fisheries Management Papers

The Committee recognises that the exploitation rate on the rock lobster stocks is very high and that this factor is a major importance in formulating the advice on management measures. However, the Committee also recognises the high level of capital investment in the industry and that any recommendation which leads to a significant change in the management rules is likely to have a far reaching effect on many of the participants. Accordingly, the Committee endeavours to reduce to a minimum the year to year changes in the management rules. When changes are required the Committee places considerable weight on matters …

Benthic Invertebrates And Crayfish Of Lake Mead, Susan K. Peck, William L. Pratt, James E. Pollard, Larry J. Paulson, Donald H. Baepler

Publications (WR)

The objectives of this study were to:

1. Establish baseline densities of benthic invertebrates and relative abundance of crayfish in Lake Mead.

2. Evaluate the distributions of benthic organisms and crayfish in relation to existing habitat conditions and 1imnological characteristics of Lake Mead.

3. Measure seasonal changes in abundances of benthic organisms and crayfish in Lake Mead.

4. Compare observations of Procambarus clarkii life history in Lake Mead to reports from other aquatic systems.

5. Evaluate the importance of benthic organisms and crayfish as food sources for game fish in Lake Mead.

Further Options For Management Of The Shark Bay Snapper Fishery : Discussion Paper., P. Millington

Fisheries Management Papers

A limited entry fishing regime for snapper was introduced in Shark Bay in order to constrain growth in fishing effort. Additional measures were introduced to reduce the number of vessels in the fishery, control areas fished and limit permitted fishing gear, with the ultimate objective of reducing catches from traditional fishing areas to long term sustainable levels.

Western Rock Lobster Industry Compensation Study. Report To The Rock Lobster Industry Advisory Committee By Arthur Young Services., Arthur Young Services

Fisheries Management Papers

Terms of reference are outlined in letter dated 11 August 1986. The Fisheries Department seeks to reduce western rock lobster fishing capacity to ensure the long-term viability of the fishery and has asked us to evaluate the financial implications of a number of specific resource management proposals.

Report Of The Rock Lobster Industry Advisory Committee Meeting Of 27 January 1987 - Report By The Chairman Mr. B.K. Bowen., B. K. Bowen

Fisheries Management Papers

The Rock Lobster Industry Advisory Committee met in Perth on Tuesday 17 January 1987. Committee discussed the following: Policy on 5% pot loss on replacement of vessels less than six years old. Study of industry funded compensation mechanism for fishing capacity reductions. 20 Fathom rule. Future maintenance of the zone E boundary. The recreational Rock Lobster Fishery. Rock Lobster pot distribution. Options for a 10 per cent reduction in fishing effort. 1987 coastal tour. Augusta-Windy Harbour Rock Lobster Working Group. Report on the 1986/87 season.

Management Measures For The Cockburn Sound Mussel Fishery., H. G. Brayford

Fisheries Management Papers

The Cockburn Sound professional fishery has seen a rapid increase in fishing effort in recent years. In response to this Cockburn Sound has been declared to be a restricted area for commercial fishing pending the introduction of long term management measures. Interim endorsements have therefore been issued for commercial fishing within Cockburn Sound.