Aquaculture and Fisheries Commons^™

State Of The Fisheries Report 1997/1998, Jim W. Penn

Status Reports of the Fisheries and Aquatic Resources

The State of the Fisheries document is designed as an essential supplement to the Annual Report to Parliament. By summarising data such as landings, effort, catch rates, stock assessment and breeding stock levels, this document provides a valuable reference point for all Western Australian fisheries of major importance to the commercial, recreational and aquaculture sectors. Information relevant to Fisheries WA's Fish and Fish Habitat Protection Program is also provided. The report indicates that overall the major fish stocks which support fisheries in Western Australia continue to be in a reasonably healthy condition. Those species which are being harvested at levels …

A Strategy For The Future Management Of The Joint Authority Northern Shark Fishery. A Discussion Paper., Tim Bray, Jo Kennedy

Fisheries Management Papers

This paper discusses the current status of the Joint Authority Northern Shark Fishery (JANSF), and the major issues affecting it. The main aim of the document is to present a seires of recommendations to enable effective future management of this resource. The paper provides a brief introduction to the JANSF, followed by an examination of the resource base of the fishery (primary species, stock distribution and stock assessment).

Western Rock Lobster Management - Options And Issues, Kevin Donohue

Fisheries Management Papers

Following the Rock Lobster Industry Advisory Committee meeting of the 3 March 1998 the Minister has advised that his position is that there will be no management changes for the 1998/99 season. The purpose of this paper is primarily to provide information explaining management options and issues for consideration of the long term management of the fishery. The paper is divided into three main sections which detail options that have been identified as having the potential to increase the catch value over the next three years. In the first section, an option for enhancing the catch value by transferring lobsters …

Fisheries Research Report No. 110 - A Research Vessel Survey Of Bottom Types In The Area Of The Abrolhos Islands And Mid-West Trawl Fishery., C. J. Dibden, L. M. Joll

Fisheries Research Reports

To address the concern expressed by Commercial rock lobster fishers operating in the Abrolhos Islands area, that expanding saucer scallop trawl activity was damaging the sea floor biota in areas which they considered good rock lobster habitat and poor scallop habitat, an underwater video survey was conducted by the Fisheries Department Research Division, with the following objectives:

1. Examine, classify and map the benthic habitat of areas currently and historically trawled for scallops in the Abrolhos Islands area and adjacent waters;

2. Examine, classify and map the benthic habitat of areas adjacent to these trawled areas, where potential for conflict …

Effects Of Uv-B Radiation On Egg And Larval Golden Shiner (Notemigonus Crysoleucas) In Castle Lake, California, Jai-Ku Kim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I studied effects of UV-B radiation on egg and larval golden shiner (Notemigonus crysoleucas) in Castle Lake, California, USA. To compare egg hatching and survival of larval golden shiner, I exposed eggs and larval fish to three different UV-B treatments, low UV-B (4% UV-B), high UV-B (92% UV-B), and ambient (100% UV-B). The egg experiment was conducted in lake and pond water, whereas proto- and mesolarval stage experiments were conducted in lake water only.

High and ambient UV-B radiation affected the hatching rate of golden shiner eggs. The mean hatching rate was 13% lower in high UV-B, and …

Kokanee Fry Recruitment And Early Life History In The Lake Tahoe Basin, Christine K. Gemperle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Lake Tahoe kokanee salmon have experienced decreasing mean adult size and fluctuating populations since 1970. We proposed to determine whether fish production was limited by spawning and incubation processes in Taylor Creek, or by growth constraints, or by mortality in the lake by studying egg-to-fry survival rates and early life history. Estimated egg-to-fry survival was 15. 9% for the 1994 brood year and 1.5% for the 1995 brood year. Egg-to-adult survival was 3.5% for the 1991 brood year and 5.9% for the 1992 brood year. Of the 35 possible survival scenarios, egg-to-fry survival was 7.5-20% and fry-to-adult survival (inlake phase) …

Effects Of Oxygen Variation On The Ecology Of Devil's Hole, Death Valley National Park, Norma J. Azad

UNLV Theses, Dissertations, Professional Papers, and Capstones

The inability to rear Devil's Hole pupfish, Cyprinodon diabolis Wales, in captivity, when captive propagation has been successful with other species of pupfish, led to the examination of environmental factors which are unique to Devil's Hole. It has been suggested that C. diabolis regularly experience developmental arrest due to hypoxic conditions. This arrest may be reversible in areas of the shallow shelf during periods of photosynthetic activity. Oxygen measurements over the shallow shelf reveal a gradient of oxygen variation with the greatest diel variability over the inner portion of the shelf diminishing to nearly imperceptible diel variation toward the outer …

Inventory For Endangered, Threatened And Rare Plant And Animal Species Within The Floodplain Corridor Of The Middle Loup River Basin In Nebraska, Michael I. Fritz, Gerry Steinauer

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This survey was conducted by Nebraska Natural Heritage Program of the Nebraska Game and Parks Commission with funding received from the U.S. Department of the Interior, Bureau of Reclamation, Grand Island office. This agreement was entered into on April 16, 1996. The objective of the agreement was to conduct a survey of a portion of the Loup River basin floodplain corridor for rare plant communities and plant and animal species. This is the final report of that survey. This report includes not only data collected directly as a result of field survey work associated with the project but also previous …

Fisheries Research Report No. 103 - Identifying The Developmental Stages For Eggs Of The Australian Pilchard, Sardinops Sagax, K. V. White, W. J. Fletcher

Fisheries Research Reports

No abstract provided.

Summary Of Submissions To Fisheries Management Paper No 108 - Issues Affecting Western Australia's Inshore Crab Fishery, Cathy Campbell

Fisheries Management Papers

The summary of submissions is a record of comments offered in respect to the contet of Fisheries Management Paper No. 108 : Issues affecting Western Australia's inshore crab fishery (the Issues Paper) and submitted by groups or individuals who have an interest in inshore crab fishing activity in this State. Concerns of the respective parties included a percieved decline in recreational crab catches at specific locations; instances of conflict between commerical and recreational crabs fishers in Geographe Bay; concern for the types of gear used to take crabs; a substantial rise in the catch of crabs in the Cockburn Sound …

Fisheries Management Report No. 2 - Use Of Market Mechanisms For The Allocation Of Commercial Fishing Access Entitlements In Western Australia, Economics Consulting Services Pty Ltd

Fisheries Published Reports

This publication has been prepared as a discussion paper on the potential use of market-based mechanisms for allocating commercial fishing entitlements in Western Australia. The aim has been to explore alternative mechanisms for allocating entitlements and the circumstances under which various methods might be more effective.

Fisheries Management Report No. 4 - Planning For The Further Development Of The Aquaculture And Marine Farming Industry At Jurien Bay, Dave Everall

Fisheries Published Reports

There is a well documented global requirement for some twenty million tonnes of edible sea foods from aquaculture in the next fifteen years. Most of the projected increase in production will need to be from mariculture because of limiting factors on land based aquaculture. At present, approximately 85%of all aquaculture occurs in the Asian region.

Globally, temperate water species have market advantages because of their ability to supply a growing market preference for a firm white fleshed fin fish. Although significant temperate water aquaculture occurs in various countries north of the equator, there are growing environmental concerns surrounding production of …

Effect Of Sampling Errors On Estimates Of Recruitment And Fishing Mortality From Separable Virtual Population Analysis, Emmanis Dorval

Biological Sciences Theses & Dissertations

Separable virtual population analysis (SVPA) models provide estimates of historical recruitment and fishing mortality from analyzing catch data based on the separability of fishing mortality into age specific-gear selection and yearly mortality. These models assume that the catch is randomly sampled and that sampling error is a random variable with constant variance and mean equal to zero. These models do not account for sampling measurement errors that occur when the catch partitioned by age is not measured on every sampling unit without error, and spatio-temporal errors that occur when the observed catch is not representative of the harvested population throughout …

Modeling Environmental Effects On Msx Prevalence And Intensity In Eastern Oyster (Crassostrea Virginica) Populations, Michelle Christine Paraso

OES Theses and Dissertations

An oyster population model coupled with a model for Haplosporidium nelsoni, the causative agent of the oyster disease MSX, was used with salinity time-series constructed from Delaware River flow measurements to study environmentally-induced variations in the annual cycle of this disease. Simulations with this model were designed to investigate the effect of increased or decreased spring freshwater discharge, the timing of high freshwater runoff, the presence or absence of a fall or late spring phytoplankton bloom, and the occurrence of a warm winter on MSX prevalence and intensity in Delaware Bay oyster populations. Model simulations for the lower Bay site …

Effects Of Fertilization On Water Quality In Grayson Lake, Kentucky., Albert W. Remley Ii

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Albert W. Remley II on January 15, 1998.

Life History, Ecology, And Low Ph Tolerance Of The Freshwater Prawn, Palaemonetes Kadiakensis Rathbun, In A Mitigated Wetland Of The Green Bottom Wildlife Management Area, West Virginia, Jennifer Ann Aderman

Theses, Dissertations and Capstones

An ecological life history study of the freshwater prawn Palaemonetes kadiakensis was conducted at the mitigated wetland of the Green Bottom Wildlife management Area (GBWMA). Monthly samples were collected from November 1996 through November 1997. In addition, weekly samples were collected from May through November for growth and reproductive analysis. Monthly samples yielded 520 prawns. Palaemonetes kadiakensis had a one-year life cycle, with all adults dying by September. Males averaged 23.82 mm (range = 14.15 to 36.75 mm) and females averaged 26.78mm (range = 15.06 to 38.60 mm) in length. Males averaged 0.087g (range = 0.014to 0.293 g) and females …

An Assessment Of The Prevalence Of The Bass Tapeworm, Proteocephalus Ambloplitis, And Other Parasites In Five Species Of Basses From River And Lake Ecosystems In West Virginia, J. Alyce Bradbury

Theses, Dissertations and Capstones

Two-hundred and fifteen basses were collected from four river sites (Racine Locks and Dam, Robert C. Byrd Locks and Dam; Ashland, KY—Ohio River; London Locks and Dam—Kanawha River) and five reservoir sites (Beech Fork Lake, East Lynn Lake, Summersville Lake, Burnsville Lake, and Stonewall Jackson Lake,). The five species of bass caught were: largemouth bass, Micropterus salmoides; smallmouth bass, Micropterus dolomieui; spotted bass, Micropterus punctulatus; white bass, Morone chrysops; and hybrid bass, Morone chyrsops x Morone saxatilis. Basses were collected by three methods: 1) local anglers (hook and line), 2) gill netting surveys; and 3) …

Reproductive Demographics And Early Life History Of The Shovelnose Sturgeon (Scaphirhynchus Platorynchus), Robert E. Colombo

Faculty Research & Creative Activity

Due to the collapse of the historic caviar fisheries in the Volga River and Caspian Sea, the demand on domestically produced caviar has increased. To supply the increased demand, the harvest of the shovelnose sturgeon Scaphirhynchus latorynchus has increased. Because caviar fisheries preferentially harvest females, information regardingthe sexual demographics of these populations is essential for effective fisheries management. To date, knowledge regarding the sex ratios and reproductive development of the shovelnose sturgeon population in the Middle Mississippi River is lacking. In Chapter 1, I describe this problem in detail and in subsequent chapters I explain how I addressed this problem …

Reproductive Demographics And Early Life History Of The Shovelnose Sturgeon (Scaphirhynchus Platorynchus), Robert Colombo

Faculty Research & Creative Activity

Due to the collapse of the historic caviar fisheries in the Volga River and Caspian Sea, the demand on domestically produced caviar has increased. To supply the increased demand, the harvest of the shovelnose sturgeon Scaphirhynchus latorynchus has increased. Because caviar fisheries preferentially harvest females, information regardingthe sexual demographics of these populations is essential for effective fisheries management. To date, knowledge regarding the sex ratios and reproductive development of the shovelnose sturgeon population in the Middle Mississippi River is lacking. In Chapter 1, I describe this problem in detail and in subsequent chapters I explain how I addressed this problem …

Trace Elements In The Aquatic Bird Food Chain At The North Ponds, Texaco Refinery Casper, Wyoming, Kimberly Dickerson, Pedro Ramirez Jr.

United States Fish and Wildlife Service: Publications

The objectives of this study were to determine nesting success of aquatic birds, trace element concentrations in the aquatic food chain, and whether trace elements were biomagnifying through the aquatic food chain of ponds at the inactive Texaco Refinery, in Evansville, Wyoming. Trace element concentrations in samples collected from the Texaco Refinery were compared to those found in samples collected from a background site, Pathfinder National Wildlife Refuge.

The ponds at the inactive refinery provided a source of water to aquatic birds in an otherwise arid landscape. Nesting success for shorebirds using an island in Pond 1 was greater than …

Contaminants Information Bulletin: Environmental Contaminants In Sedimente From Oilfield Produced Water Discharge Points, Pedro Ramirez Jr.

United States Fish and Wildlife Service: Publications

Oilfield produced water is generated from the extraction of oil mixed with groundwater. A separator is used to physically remove the water from the oil; however, the produced water can contain residual amounts of oil. Additionally, malfunction of the separator equipment can cause inefficient separation and result in higher amounts of oil in the water. The Wyoming Department of Environmental Quality (WY DEQ) regulates the discharge of produced waters under the National Pollution Discharge Elimination System (NPDES) .WY DEQ permits 10 µg/l of oil in produced water discharged into regulated waters of the state. Produced water discharges are not permitted …

Kirtland’S Warbler Dendroica Kirtlandii

United States Fish and Wildlife Service: Publications

The first Kirtland’s warbler in North America was identified in 1851 from a specimen collected on Dr. Jared Kirtland’s farm near Cleveland, Ohio. Biologists did not learn where it nested until 1903 when they found a warbler nest in Michigan. Today, Kirtland’s warbler faces two significant threats: lack of crucial young jack pine forest habitat and the parasitic cowbird.

A pair of Kirtland’s warblers requires at least eight acres of young jack pine forest to nest, but usually needs 30 to 40 acres to raise a nest of young. Its exacting nesting habitat requirements, as well as cowbird parasitism, caused …

The Use Of Isoelectric Focusing To Assess The Genetic Diversity Of The Cyprinid Fishes: Rhinichthys Cataractae And Rhinichthys Atratulus In West Virginia, Fauzia Alam Miah

Theses, Dissertations and Capstones

In this study, isoelectric focusing is used to separate proteins of Rhinichthys cataractae and R. atratulus and conventional staining is used to identify alleles of six genes. The objective of this work is to determine whether these methods can effectively assay isozymes that may be used to establish the relationship between anthropogenic stress and genetic diversity. Alleles for LDH-A, LDH-B, EST-A, EST-B, EST-C, and EST-D loci were identified for two species of fish, R. atratulus and R. cataractae. Both fish species are known to be sensitive to anthropogenic stress and known to be widely distributed in stressed environments. Alleles …

Fisheries Research Report No.109 - The Western Rock Lobster Fishery 1991/92 To 1992/93, C. F. Chubb, E. H. Barker

Fisheries Research Reports

The 1991/92 and 1992/93 seasons produced 12,200 and 12,300 tonnes of rock lobsters, taken by 12.8 and 11.8 million pot lifts respectively.

This report covering these two seasons is the latest in a series of reports covering The Western Rock Lobster Fishery, which is Western Australia's largest and most valuable fishery.

These reports are a historical record of various data for use by industry and research personnel now and in the future and covers such issues as: management/legislative changes, value of the product and licences, input costs (fuel, bait etc), changes in fishing practices, gear, technology and boats, together with …

1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume I, Terri Hildebrand

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This study resulted from an agreement between Nebraska Game and Parks Commission (NGPC) and the United States Fish and Wildlife Service (USFW). After the 1996 discovery of Spiranthes diluvialis, in western Nebraska, NGPC was seeking to determine the extent of the Nebraska population. Information on the wet meadow community of orchid occurrence in Nebraska and eastern Wyoming was needed. This report includes descriptions of communities inventoried, Spiranthes diluvialis populations, and additional species monitored by Nebraska and Wyoming Natural Heritage programs.

The 1996 discovery of Spiranthes diluvialis in Nebraska by Hazlett merited the need for further inventory for the species …

The Role Of Anadromous Sockeye Salmon (Oncorhynchus Nerka) In The Nutrient Loading And Productivity Of The Sawtooth Valley Lakes, Idaho, H. P. Gross, Wayne A. Wurtsbaugh, Chris Luecke

Watershed Sciences Faculty Publications

We constructed a simulation model for Redfish Lake, Idaho, using water budget and nutrient loading measurements, to predict the dependence of lake production on nutrients from the watershed, precipitation, lake fertilization, and marine-derived nutrients from sockeye salmon Oncorhynchus nerka, which historically have reared in the lake. We also used the model to simulate different management scenarios to help restore the endangered Snake River sockeye salmon. The model and other empirical evidence indicated that even before hydropower dams were present in the migration corridor, marine-derived nutrients were not of major importance to lake production, contributing only about 3% of the annual …

Desert Tortoise Gopherus Agassizii

United States Fish and Wildlife Service: Publications

Desert tortoises, also known as desert turtles or gopher tortoises, currently are found in Arizona, California, Nevada, and Utah, as well as parts of Mexico, and in the Mojave, Colorado, Sonoran and Sinaloan deserts.  As the result of various human activities over the past 150 years, tortoises have been eliminated or reduced in large portions of their range in California and in areas near Las Vegas and St. George, Utah.

Desert tortoise population densities range from just a few per square mile to more than 200 per square mile.  Although the number of desert tortoises in the world is unknown, …

Adding Nutrients To Enhance The Growth Of Endangered Sockeye Salmon: Trophic Transfer In An Oligotrophic Lake, Phaedra E. Budy, Chris Luecke, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Snake River sockeye salmon Oncorhynchus nerka, listed under U.S. law as endangered in 1991 in response to a decline in anadromous adult numbers, spend their first 1–2 years in Redfish Lake, Idaho, before migrating to the sea. To determine how nutrient enhancement might influence phytoplankton, zooplankton, and fish production, we performed fertilization experiments in large enclosures in this oligotrophic lake using juvenile kokanee (lacustrine O. nerka) as analogues for endangered sockeye salmon. Fertilization of the metalimnion substantially increased chlorophyll a (150%), phytoplankton biovolume (75%), primary productivity (250%), and zooplankton biomass (200%), and moderately increased fish growth (12%) over our control …

Trace Element Signatures In Otoliths Record Natal River Of Juvenile American Shad (Alosa Sapidissima), Simon R. Thorrold, Cynthia M. Jones, Steven E. Campana, James W. Mclaren, Joseph W. H. Lam

OES Faculty Publications

The elemental composition of fish otoliths may represent a permanent record of the environmental conditions an individual has experienced as trace elements, incorporated into the growing surface of the otolith, reflect the physical and chemical characteristics of the ambient water. We tested the utility of trace element signatures in otoliths as natural tags of the river of origin of juvenile American shad (Alosa sapidissima) collected from the Connecticut, Hudson and Delaware Rivers in August and October 1994. Four elements (K, Mn, Sr, and Ba) showed significant variability among sites within rivers in August, although only Mg showed a …

The Role Of Bowfin, Amia Calva, In Multiple Species Management Plans, Benjamin Jacob Hausmann

Masters Theses

The major challenge to fisheries managers of the 21st century will be to maintain the diversity, not only of fishing opportunity, but also of traditionally non-game and economically unimportant species. With the relatively recent understanding of the importance of ecosystem level management, attention is being focused on native species that were often ignored or eradicated under past management practices. One such fish that has been largely ignored is the bowfin, Amia calva. Ecological data pertaining to bowfin natural history are limited and to date no attempt has been made to integrate bowfin into fisheries management decisions within the species native …