WorldCat Identities

Levings, C. D.

Overview
Works: 104 works in 273 publications in 2 languages and 703 library holdings
Genres: Conference papers and proceedings  Classification 
Roles: Author, Editor
Classifications: SH223, 597.55
Publication Timeline
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Most widely held works by C. D Levings
An Account of an experimental release of marked juvenile Chinook to freshwater, estuarine, and marine habitats near Campbell River, B.C. by Canada( Book )

11 editions published in 1984 in English and held by 41 WorldCat member libraries worldwide

Biological reconnaissance of Yakoun River estuary, Queen Charlotte Islands, and results of a trial fertilization with urea by Canada( Book )

10 editions published between 1982 and 1983 in English and held by 26 WorldCat member libraries worldwide

A preliminary study of hatchery chinook salmon smolts migrating in the lower Fraser River, determined by radiotagging by N. A Hvidsten( Book )

9 editions published between 1995 and 1996 in English and held by 21 WorldCat member libraries worldwide

Presents results of a study investigating the feasibility of using radio tags to determine the migration routes, patterns of movement, and migration speed of chinook salmon smolts in the lower Fraser River. A specific part of the investigation assessed fish use of two constructed embayments in the river, one on Annacis Channel and another at Richmond Island. The researchers tagged the smolts with Advanced Telemetry Systems Model 392 transmitters (5-milliwatt) and tracked the fish in boats, with positions taken using a global positioning system receiver. Results presented include routes of fish released at Mission, below New Westminster, and between Ruskin and Port Main. Tidal and river current effects on smolt migration are also discussed
Laboratory experiments on the effects of ocean dumping on benthic invertebrates by B. D Chang( Book )

5 editions published in 1976 in English and held by 21 WorldCat member libraries worldwide

Laboratory studies on the survival of Anisogammarus confervicolus and Gammarus setosus (Amphipoda, Gammaridea) in sea water and bleached Kraft pulp mill effluent by C. D Levings( Book )

4 editions published in 1976 in English and held by 20 WorldCat member libraries worldwide

Industrial disruption of invertebrate communities on beaches in Howe Sound, B.C. by C. D Levings( Book )

5 editions published in 1976 in English and held by 20 WorldCat member libraries worldwide

Proceedings of the DFO Workshop on Research Priorities to Improve Methods for Assessing Productive Capacity for Fish Habitat Management and Impact Assessment, Sidney, B.C., May 13-15, 1996 by DFO Workshop on Research Priorities to Improve Methods for Assessing Productive Capacity for Fish Habitat Management and Impact Assessment( Book )

8 editions published in 1997 in English and held by 19 WorldCat member libraries worldwide

Contains papers presented at a workshop held to address the need for scientifically defensible techniques for measuring changes in the productive capacity of fish habitats. Papers covered both marine, estuarine, anadromous, and fresh water fish habitat. Topics of papers include habitat-hydraulic models, habitat sciences programs, estuarine and marine carrying capacity in Atlantic Canada, fish habitat management, and assessment of productive capacity in the Maritimes, Arctic, and Pacific regions
Utilization of the Campbell River Estuary by juvenile chinook salmon (Oncorhynchus tshawytscha) in 1994 by Joshua Korman( Book )

3 editions published in 1997 in English and held by 17 WorldCat member libraries worldwide

Presents an analysis of juvenile salmon population growth and abundance data collected in the Campbell River estuary in 1994 to describe chinook habitat use, residency timing, growth, and potential competitive interactions between wild chinook fry, hatchery chinook, and other salmon species. Results are compared with previous information on habitat use, residence timing, and growth of wild and hatchery chinook. Analyses are presented in five parts: use of a discriminant function to predict the origin of chinook juveniles whose origin could not be field-determined; estimation of density and biomass of juvenile salmon in the estuary and a comparison of habitat use and residence timing; calculation of growth rates for wild and hatchery chinook; prediction of wild chinook fry weight based on total salmon biomass; and estimation of the carrying capacity of the estuary for juvenile chinook, coho, and all salmon species combined, based on mark-recapture and escapement-biostandard methods
Effects of suspended sediment on eggs and larvae of lingcod (Ophiodon elongatus), Pacific herring (Clupea harengus pallasi), and surf smelt (Hypomesus pretiosus) by Canada( Book )

8 editions published between 1989 and 1990 in English and held by 17 WorldCat member libraries worldwide

Biological effects of ocean disposal of dredged spoils have been studied extensively in recent years but most of the published data have dealt with adult life stages, and little information is available regarding effects on egg and larval stages of marine species. This report studies the effects of dredged spoils on the eggs and larvae of lingcod, Pacific herring and surf smelt, all commercially important species. These species spawn in proximity to the Point Grey and Victoria Ocean dumpsites. Bioassay tests using eggs and larvae of each species were conducted to investigate the toxic effects of contaminated and uncontaminated sediment suspensions upon hatching success, timing of development, and larval survival after hatching. Based on these data, recommendations are made regarding the use of toxicity testing with early life history stages of marine fish species to determine the quality of dredged spoils designated for ocean dumping
Distribution of macroinvertebrate communities on a mud flat influenced by sewage, Fraser River estuary, British Columbia by G Otte( Book )

7 editions published between 1974 and 1975 in English and Undetermined and held by 16 WorldCat member libraries worldwide

Proceedings of the National Workshop on Effects of Habitat Alteration on Salmonid Stocks by Canada( Book )

5 editions published in 1989 in English and held by 16 WorldCat member libraries worldwide

National workshop convened to review the latest techniques available to quantify relationships between habitat features and fish production. The workshop focused on salmonids because of their importance on both the Atlantic and Pacific coasts, but effects on other non-salmonid populations were included since data is scarce in some areas. Coverage included methodologies for the quantification of the effects of habitat alteration on yield, empirical examples of the effects of physical and chemical habitat changes on stocks, and the permissable degree of extrapolation in assigning effects of habitat alteration to a stock
Laboratory experiments on the effects of ocean dumping on benthic invertebrates by B. D Chang( Book )

2 editions published in 1976 in English and held by 14 WorldCat member libraries worldwide

Les conséquences écologiques du dragage et de l'élimination des résidus du dragage dans les eaux canadiennes by C. D Levings( Book )

3 editions published in 1983 in French and held by 13 WorldCat member libraries worldwide

A comparison of meiofauna available as fish food on Sturgeon and Roberts Banks, Fraser River estuary, British Columbia by B. A Bravender( Book )

8 editions published between 1992 and 1994 in English and held by 13 WorldCat member libraries worldwide

Demersal and benthic communities in Howe Sound basin and their responses to dissolved oxygen deficiency by Colin D Levings( Book )

7 editions published in 1980 in English and held by 12 WorldCat member libraries worldwide

Approaches to marine ecosystem delineation in the Strait of Georgia : proceedings of a D.F.O. workshop, Sidney, B.C., 4-5 November 1997 by C. D Levings( Book )

4 editions published in 1998 in English and held by 12 WorldCat member libraries worldwide

Review of current practices to reduce the risk of introducing non-indigenous species into the Pacific Region via ballast water by C. D Levings( Book )

4 editions published in 1999 in English and Undetermined and held by 3 WorldCat member libraries worldwide

This paper discusses the current status of the short term methods for ballast water management being used in Pacific Region to minimize the risk of introducing NIS (non-indigenous species). The short term solution adopted by most jurisdictions around the world is mid-ocean exchange (MOE). In the long term, ballast water treatment to "sterilize" the water, either when ballast is taken aboard or discharged, may be the preferred method. In 1997, the Vancouver Port Authority (VPA) developed a progressive policy, the mandatory ballast program, to reduce the risk of NIS arrival into waters under their jurisdiction. This paper provides a description of the program, which includes an interview procedure that enables VPA to obtain specific data on ballast procedures during a ship's voyage to Vancouver. This policy is incorporated in the proposed Canadian national guidelines for ballast water management. Briefly, if a ship has not performed mid ocean ballast water exchange, the ship can be sent back out to sea to deballast, subject to safety concerns, and a number of exemptions
A perspective on the use of performance based standards to assist in fish habitat management on the seafloor near salmon net pen operations in British Columbia by Colin D Levings( Book )

4 editions published in 2002 in English and held by 2 WorldCat member libraries worldwide

Evaluation of ecological criteria for selecting MPAs in Pacific Region : a proposed semi-quantitative approach by C. D Levings( Book )

4 editions published in 1999 in English and Undetermined and held by 1 WorldCat member library worldwide

This paper reviews some of the semi-quantitative methods for choosing locations for Marine Protected Areas (MPAs) and discuss their potential use for MPA site selection in Pacific Region. A number of authorities involved in marine conservation have proposed specific criteria or design principles for MPA selection, often following those set out by the International Union for the Conservation of Nature a number of years ago. Most of the criteria schemes are qualitative, which can make the selection procedure subjective and difficult to track in an open and defensible manner. Because of the complexity of marine ecosystems and the lack of site specific data, development of a quantitative scheme is not possible at this time
Chlorinated organic contaminants in benthic organisms of the lower Fraser River near Agassiz, British Columbia by John S Richardson( )

1 edition published in 1998 in English and held by 0 WorldCat member libraries worldwide

 
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Languages
English (106)

French (3)