Aquaculture and Fisheries Commons^™

Management Of The South Coast Purse Seine Fishery, J Fowler, K Donohue, R.C. J. Lenanton, M. Moran, D Gaughan

Fisheries Management Papers

This paper has presented a strategy for moving the management of the small pelagics fishery off the south coast to management of the whole fishery, which facilitates a more biologically sound and economically stable fishery.

A Pricing Policy For Fisheries Agencies, Management Committee Of Scfa, Standing Committee Of Fisheries And Aquaculture (Sfca), Department Of Primary Industries And Energy

Fisheries Management Papers

The intent of this paper is to inform members of Standing Committee for Fisheries and Aquaculture (SCFA) and the members of the Ministerial Council for Fisheries, Forestry and Aquaculture of the methods of fee setting that are currently applied by fisheries agencies in Australia, and alternative pricing policies for fisheries agencies.

Natural History Of The Four-Toed Salamander, Hemidactylium Scutatum, In West Virginia, Sandra L. Kilpatrick

Theses, Dissertations and Capstones

A 2-year study was conducted to determine the reproductive and nesting habits, embryonic and larval development, and tolerance to acid conditions of Hemidactylium scutatum in West Virginia. Five study sites located in or adjacent to the Otter Creek National Wilderness Area, Monongahela National Forest, Randolph County, West Virginia, were monitored to determine nesting habits and length of incubation and larval periods in Hemidactylium Time of breeding was determined by spermatogenic wave analysis and time of egg deposition was determined by examination of ovarian follicles and field observations of gravid females migrating to nest sites. Breeding occurred in autumn and again …

Ecological Life History Of Crangonyx Pseudogracilis Bousfield (Crustacea: Amphipoda) In The Green Bottom Wildlife Management Area, Cabell County, West Virginia, Andrea Leigh Henry

Theses, Dissertations and Capstones

Although the genus Crangonyx has been studied in the Appalachian area, most of this work has concentrated on subterranean species. A Crangonyx pseudogracilis population from the Green Bottom Wildlife Management Area (GBWMA), Cabell County, West Virginia was sampled weekly from March 1995 through July 1996 to investigate the ecological life history of the amphipod. A total of 1508 amphipods were collected. Amphipods were present in the study sites from November through July, at which time they migrated to deeper waters. Crangonyx pseudogracilis had a one year life cycle and bred from November to May. Adult amphipods began to die off …

Observations On Reproduction, Isozyme Patterns, And Meristics In Mosquitofish (Pisces: Poeciliidae) From West Virginia, Matt Mcreynolds

Theses, Dissertations and Capstones

Prior to 1988, two subspecies of the mosquitofish Gambusia affinis (G. a. affinis and G. a. holbrooki) were recognized along the Gulf and Atlantic Coasts of the United States. Based on electrophoretic analysis, subsequent investigators recognized G. holbrooki and G. affinis as separate species. Populations in drainages west of Mobile Bay were considered G. affinis, and those east of this divide being G. holbrooki. The only mosquitofish population in West Virginia is found in the Meadow River wetlands (1392 ha). This wetland complex is located at the western end of Greenbrier County in the Allegheny Mountain Province. …

Diet And Growth Of Larval And Juvenile Grass Pickerel, Esox Americanus Vermiculatus, And Central Mudminnow, Umbra Limi, In The Green Bottom Wildlife Management Area, Cabell County, West Virginia, Erica Midkiff

Theses, Dissertations and Capstones

The grass pickerel, Esox americanus vermiculatus, is listed as Undetermined on the Vertebrate Species List of Concern in West Virginia. The central mudminnow, Umbra limi, is a disjunct population in Green Bottom Swamp. The lentic, vegetated areas that are required for spawning for the grass pickerel and the central mudminnow have been reduced by residential, agricultural, and industrial developments. Green Bottom Swamp, a naturally occurring wetland of 58 ha, and a nearby mitigated wetland of 29 ha, provides spawning habitat for the grass pickerel and the mudminnow. Fishes were collected in beds of Potamogetan crispus and Ceratophyllum demursum …

Nesting Piping Plover And Least Tern On The Kansas River, William H. Busby, Daniel W. Mulhern, P. Gregory Kramos, David A. Rintoul, William C. Tuttle

United States Fish and Wildlife Service: Publications

A portion of the Kansas River in northeastern Kansas was surveyed by boat and air in 1996 and 1997 for nesting colonies of piping plover (Charadrius melodus) and least tern (Sterna antillarum). Both species were found breeding on sandbars at a total of five sites along a 30-km reach of the Kansas River. In 1996, at least two breeding pair of piping plovers and seven breeding pair of least terns were documented. In 1997, at least one pair of piping plovers and five pairs of least terns bred. These are the first known breeding records for …

Neotropical Migratory Birds, Stephanie L. Jones

United States Fish and Wildlife Service: Publications

This book is a follow-up synthesis to a meeting held in Estes Park, Colorado, in 1992, by Partners in Flight - Aves de Americas. An earlier volume, edited by Finch and P. W. Stangel (USDA Forest Service General Technical Report RM-229, 1993) included most of the papers presented at that meeting. This book is a carefully edited synthesis of some of the issues that arose from an increased interest in neotropical migratory birds. As …

1997 North American Conference On The Monarch Butterfly

United States Fish and Wildlife Service: Publications

The Monarch Butterfly has attracted much interest because it is unique not only among insects, but among all living things. The largest Monarch population emerges in the central and northeastern United States and Canada and flutters its way south several thousand kilometers to remote fir forests in the central mountains of Mexico. There they overwinter in about twenty compact colonies—sometimes numbering in the tens of millions—often within a stone’s throw of local subsistence farms sustaining Mexican campesinos (small-scale farmers) and indigenous peoples. In the spring, the northward trek begins, often with an additional generation being required to reach the northern …

Environmental Contaminants In The Aquatic Bird Food Chain Of An Oil Refinery Wastewater Pond, Pedro Ramirez Jr.

United States Fish and Wildlife Service: Publications

Bird mortalities have been documented in oilfield waste pits in Wyoming and various other oil-producing states in the western United States. In the semi-arid West, migratory birds mistake wastewater ponds or pits for wetlands. Most refineries use large ponds to contain their wastewater. One refinery in Casper, Wyoming actively discharged refinery wastewater into a closed basin, Soda Lake. This created a wetland that attracts numerous aquatic birds, in particular, nesting colonies of gulls (Larus spp.), terns (Sterna spp.), double-crested cormorants (Phalacrocorax auritus), eared grebes (Podiceps nigricollis), dabbler ducks (Anas spp.) and American avocets ( …

Arsenic, Mercury, Selenium, And Organochlorine Compounds In Interior Least Tern Eggs In The Northern Great Plains States, 1992-1994, George T. Allen, Susan Humphreys Blackford

United States Fish and Wildlife Service: Publications

The purpose of this study was to evaluate concentrations of arsenic, mercury, selenium, and chlorinated hydrocarbon compounds in interior least tern eggs from the northern Great Plains states from 1992 through 1994. The Environmental Contaminants Specialists in Kansas, Nebraska, South Dakota, North Dakota, and Montana agreed on a standard protocol for collection and analyses of eggs during the study period.

Addled, fiooded, or abandoned eggs collected during the study period were submitted for chemical analysis by the Environmental Contaminants Specialist in each state.

A total of 104 eggs were analyzed for arsenic, mercury, and selenium; 78 of them also were …

An Investigation Of Irrigation-Related Contaminants In Water, Bottom Sediment, And Biota From Goshen County, Wyoming., Kimberly Dickerson, Pedro Ramirez Jr.

United States Fish and Wildlife Service: Publications

We conducted a comprehensive evaluation of trace element concentrations in water, sediment, aquatic vegetation, aquatic invertebrates, waterbird eggs, and fish resulting from irrigation drainwater during 1995 in Goshen County, Wyoming. We also analyzed waterbird eggs and fish from this area for organochlorine residues and attempted to determine the nesting success of various waterbirds.

Boron concentrations were elevated (>300 ug/g dry weight) in aquatic vegetation above concentrations shown to adversely affect sensitive waterfowl; however, these concentrations are similar to those found in aquatic vegetation sampled in other areas throughout Wyoming. Mercury concentrations in aquatic vegetation, aquatic invertebrates, and fish were …

Follow-Up Investigation Of Selenium And Other Trace Elements In Biota From The Riverton Reclamation Project, Fremont County, Wyoming, Pedro Ramirez Jr., Kim Dickerson

United States Fish and Wildlife Service: Publications

A reconnaissance study was completed for the Riverton Reclamation Project (Riverton Project) in 1989 by Peterson et al. (1991) showed slightly elevated selenium concentrations in biota at several wetland sites. A follow-up investigation was initiated for the Department of Interior's National Irrigation Water Quality Program in 1994 to verify that selenium concentrations in biota were elevated above levels that cause adverse effects to aquatic migratory birds. Pondweed (Potamogeton vaginatus), aquatic invertebrates, bird eggs, and fish were collected from several wetlands managed by the Wyoming Game and Fish Department and analyzed for selenium and other trace elements. Selenium concentrations …

Western Australian Fisheries - At A Glance (1997), Fisheries Department Of Western Australia

Fisheries Published Reports

Western Australia's fisheries are the envy of the world. The calibre of our research and management, and the skills of our fishermen, are recognised as second to none. We have pristine oceans and waterways from which we draw fish and fish products of the very best quality.

But while WA ranks as Australia's leading producer and exporter of fish and aquaculture products, we are not resting on our laurels. A major review of fisheries administration has cemented environmental and economic sustainability as the key management objectives, and industry now has greater scope for improving its competitiveness by pursuing new marketing …

Lake Winona Committee Documents, Cal R. Fremling

Cal Fremling Papers

Documents for the Lake Winona Committee, including meeting agendas and memos, handwritten notes, and a news clipping from the Winona Daily News concerning a funding plan for dredging Lake Winona. 8 pages. Part of the Cal R. Fremling Collection.

Finfish Aquaculture In Western Australia, David Berry

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

David Berry surveys fish farming from Broome to Williams, on off shore reefs and in farm dams, for barramundi, silver perch and black bream, trout and tuna.

Fertilization Of An Oligotrophic Lake With A Deep Chlorophyll Maximum: Predicting The Effect On Primary Productivity, H. P. Gross, Wayne A. Wurtsbaugh, Phaedra E. Budy, Chris Luecke

Watershed Sciences Faculty Publications

We investigated how epilimnetic fertilization would affect chlorophyll levels and light penetration of oligotrophic sockeye salmon (Oncorhynchus nerka) lakes and how the resulting self-shading would affect primary production of the prominent deep chlorophyll maxima (DCM) of the lakes. Epilimnetic nutrient additions to large mesocosms (330 m3) in Redfish Lake, Idaho, increased levels of primary productivity and chlorophyll a but decreased Secchi depths and light available in the metalimnion and hypolimnion. Redfish Lake and other Sawtooth Valley (Idaho) lakes had DCM in which the mean chlorophyll a peaks were 240-1000% of mean epilimnetic chlorophyll a concentrations. The DCM existed at low …

Hydroacoustic Assessment Of Abundance And Diel Distribution Of Sockeye Salmon And Kokanee In The Sawtooth Valley Lakes, Idaho, D. Beauchamp, Chris Luecke, Wayne A. Wurtsbaugh, H. G. Gross, Phaedra E. Budy, S. Spaulding, R. Dilenger, C. P. Gubala

Watershed Sciences Faculty Publications

We used dual-beam hydroacoustics and echo integration techniques, combined with midwater trawling and gillnetting, to assess the abundance and distribution of the endangered Snake River juvenile sockeye salmon and resident kokanee (both Oncorhynchus nerka) in Sawtooth Valley lakes of Idaho during September 1991 and 1992. Abundance of O. nerka varied among the four lakes containing this species (12,500–257,000) and varied between years in Redfish Lake (86,400 in 1994 and 241,000 in 1992) and Alturas Lake (230,000 in 1991 and 257,000 in 1992). In Alturas Lake, where piscivore densities were high and zooplankton densities were low, small acoustic targets (≤18 cm …

Nutrient Limitation Of Oligotrophic Sockeye Salmon Lakes Of Idaho (Usa), Wayne A. Wurtsbaugh, H. P. Gross, Chris Luecke, Phaedra E. Budy

Watershed Sciences Faculty Publications

"Phytoplankton production in lake ecosystems is frequently controlled by amounts of nitrogen and phosphorus (Smith 1982, Elser et al. 1990), as well as minor- and micro-nutrients (Wurtsbaugh & Horne 1983, Wurtsbaugh 1988, Lovstad & Bjorndalen 1990). Nutrient limitation is often studied to determine which nutrient(s) should be reduced to control lake eutrophication (Schindler 1974(. Conversely, nutrients have been used for decades to stimulate plankton and, subsequently, fish production in aquaculture (Bardach et al. 1972). More recently, lake fertilization has been used to augment salmon runs for commercial exploitation (Hyatt & Stockner 1985, lye et al. 1988), and it has been …

Comparison Of The Aquatic Ecology Of Side-Canyons And The Main Channel Of Lake Powell 1997, Wayne A. Wurtsbaugh, Kirsten L. Gallo

Watershed Sciences Faculty Publications

Physical characteristics of lakes are highly interrelated with biological characteristics. We measured and analyzed the physical characteristics of two side canyons in order to better understand differences in productivity between side canyons and the main channel and to provide general information on the characteristics of the lake.

Yield-Per-Recruit Analysis And Management Strategies For Atlantic Croaker, Micropogonias Undulatus, In The Middle Atlantic Bight, Luiz R. Barbieri, Mark E. Chittenden, Cynthia M. Jones

OES Faculty Publications

The effect of different fishing mortality (F) and natural mortality (M), and age at first capture (t(c)) on yield-per-recruit of Atlantic croaker, Micropogonias undulatus, in the lower Chesapeake Bay and North Carolina were evaluated with the Beverton-Holt model. Independent of the level of M (0.20-0.35) or F (0.01-2.0) used in simulations, yield-per-recruit values for Chesapeake Bay were consistently higher at t((c)) = 1 and decreased continuously with increases in t(c) (2-5). Although maximum yield-per-recruit always occurred at the maximum level off (F=2.0), marginal increases in yield beyond F = 0.50-0.75 were negligible. Current F (F(CUR)) is estimated to be …

Age And Growth Of Larval And Juvenile Atlantic Croaker, Micropogonias Undulatus, From The Middle Atlantic Bight And Estuarine Waters Of Virginia, Stephen W. Nixon, Cynthia M. Jones

OES Faculty Publications

Sagittal otoliths were used to determine age and growth of 605 larval and juvenile Atlantic croaker, Micropogonias undulatus, collected in the Middle Atlantic Bight and estuarine waters of Virginia. This study is the first to use age-based analysis for young Atlantic croaker collected in this region. A Laird-Gompertz model (r2=0.95) was used to describe the growth of Atlantic croaker up to 65 mm standard length (SL) and 142 days (t): SL((t)) = 2.657 exp (4.656 [1-exp (-0.0081t)]); where SL((t)) = standard length at day t. Spatial and temporal patterns in the size and age of Atlantic croaker showed a …

Response Of Otolith Microchemistry To Environmental Variations Experienced By Larval And Juvenile Atlantic Croaker (Micropogonias Undulatus), Simon R. Thorrold, Cynthia M. Jones, Steven E. Campana

OES Faculty Publications

Minor and trace elements incorporated into otoliths during growth may permanently record environmental conditions experienced by fishes. To determine the validity of this approach, we used laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) to assay sectioned otoliths from juvenile Atlantic croaker (Micropogonias undulatus) collected from each of three sites in the Neuse River, North Carolina, and the Elizabeth River, Virginia. Elemental concentrations at the center of the otoliths did not differ between locations, although both Mg : Ca and Ba : Ca were significantly higher at the edge of otoliths from the Neuse River than from the …

A Taxonomic Study Of The Class Insecta In The Green Bottom Wildlife Management Area With Notes On The Life History Of Belostoma Lutarium (Stal), And Hesperocorixa Lucida (Abbott), Cabell County, West Virginia, Eric Wilhelm

Theses, Dissertations and Capstones

Green Bottom Wildlife Management Area (GBWMA), Cabell County, West Virginia, is a wetlands system adjacent to the Ohio River composed of wetlands varying in age from 4 to 60 years. This system is annually flooded by the Ohio River, yet insect communities remain unique to each vegetation type or microhabitat. Nine vegetative communities from two wetlands were sampled and compared using chi-square analysis to determine if the insect communities were unique. A total of 34,975 specimens, representing 23 families, were collected over ten sample intervals. Chi-square analysis on seven families common to all sites indicated that each vegetative community yielded …

1997 Rapid Ecological Assessment Northern Great Plains Steppe Ecoregion: Western And Central South Dakota, Northwestern Nebraska, Eastern Wyoming, A Final Report, Terri Hildebrand

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

In an effort to gain a more complete understanding of existing vegetative communities of the Northern Great Plains Steppe Ecoregion, rapid ecological assessment was undertaken throughout the ecoregion during the field season of 1997. Field office personnel of The Nature Conservancy and private contractors evaluated previously delineated regions in accordance with methodology determined in May of 1997. The following document presents results of the rapid ecological assessments performed by Hildebrand Contracting. The purpose of this document is to provide The Nature Conservancy with information to help determine the vegetative features of regions sampled. The specific areas and boundaries for evaluation …

Attributes Of Black-Tailed Prairie Dog Colonies In Northcentral Montana, Richard Reading, Randy Matchett

United States Fish and Wildlife Service: Publications

We examined several characteristics of black-tailed prairie dog (Cynomys ludovicianus) colonies in Phillips County, Montana, including slope, aspect, soils, land tenure, and distance from roads using a geographic information system (GIs). Colonies exhibited significantly smaller slopes, but not significantly different aspects than did randomly located polygons. In addition, colonies were more prevalent than expected on well drained clay-loam and loam soils and on U.S. Bureau of Land Management (BLM) land than on other soil types or on private land. Although prairie dogs commonly use roads for dispersal, distance to nearest road was not related to prairie dog density …

Native Habitats Of The Twin Cities Area, Craig A. Faanes

United States Fish and Wildlife Service: Publications

European settlers and their descendants have left an indelible mark on the landscape of most of the Nation, especially near major population centers. Responding to the dramatic changes in landscape, conservation biologists find themselves scurrying to save a bit of the once bountiful diversity. But before steps can be taken to protect remaining resources, a thorough inventory of the land and its resources is required.

Wildlife Biologue: American Buffalo (Bison Bison)

United States Fish and Wildlife Service: Publications

It is believed that buffalo, or bison, crossed over a land bridge that once connected the Asian and North American continents.  Through the centuries buffalo slowly moved southward, eventually reaching as far south as Mexico and as far east as the Atlantic Coast, extending south to Florida.  But the largest herds were found on the plains and prairies from the Rocky Mountains east to the Mississippi River, and from Great Slave Lake in Canada to Texas.

Because the great herds were nearly gone before any organized attempts were made to survey populations, we may never know just how many buffalo …

Predation By Gambusia Holbrooki (Girard) (Pisces Poeciliidae) On Tadpoles : Feeding Trials And Microhabitat Utilisation In Two Contrasting Wetlands On The Swan Coastal Plain, Western Australia, Beate Sommer

Theses : Honours

Predation by non-native Gambusia spp. (somewhat inappropriately referred to as “Mosquitofish”) has been implicated in the decline of some frog populations overseas and in eastern Australia. Originally introduced to control mosquito larvae, Gambusia holbrooki are now widely distributed and abundant in wetlands of the Swan Coastal Plain (Western Australia). Anecdotal evidence suggests that some frog populations on the Swan Coastal Plain may be declining. Through a series of laboratory feeding trials and a field survey conducted in a permanent and a seasonal wetland on the Swan Coastal Plain, this study investigated whether predation by G. holbrooki has the potential to …

Department Of Fisheries Annual Report 1996-1997, Department Of Fisheries, Western Australia

Department of Fisheries Annual Reports

In accordance with Section 62 of the Financial Administration and Audit Act 1985, 1 submit for your information the Annual Report of the Fisheries Department for the financial year ending 30 June 1997.

The Annual Report has been prepared in accordance with the provisions of the Financial Administration and Audit Act 1985 and Section 263 of the Fish Resources Management Act 1994.