WorldCat Identities

Levings, Colin D.

Works: 123 works in 425 publications in 1 language and 2,007 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Editor, Other
Publication Timeline
Most widely held works by Colin D Levings
Fjord oceanography : [proceedings of the NATO Conference on Fjord Oceanography, held in Victoria, British Columbia, Canada, June 4-8, 1979, and sponsored by the NATO Special Program Panel on Marine Sciences] by Howard J Freeland( Book )

11 editions published in 1980 in English and held by 235 WorldCat member libraries worldwide

Fjords are deep, glacia11y carved estuaries that are pecu1iar to certain coast1ines, and have severa1 characteristics that dist inguish them from sha110wer embayments. At higher latitudes they indent the western coast1ines of Scandinavia, North and South America, and New Zea1and. They are a1so a common feature of much of the arctic coast1ine. The papers contained in this vo1ume were presented at a workshop funded by the NATO Advanced Studies Institute in Victoria, British Co1umbia. It may seem curious to the reader that this specia1 c1ass of estuaries shou1d have attracted an international gathering of oceanographers from severa1 different discip1ines. The reas on for this interest stems from both practica1 and scientific considerations. On the one hand, fjords are a feature common to the coast1ines of severa1 countries that depend heavi1y on the oceans for communication, fisheries and other resources. The impact of man's activities on these coasts has created a demand for new know1edge of the physica1, bio10gica1 and chemica1 aspects of fjords. Sometimes man's inf1uence on the ocean is intentiona1 as, for examp1e, in the artificia1 contro1 of ice cover; often it is the more insidious bui1d-up of toxic wastes that is of concern. These prob1ems are particu1ar1y acute where the conf1icting demands of fisheries, industria1 deve10pment and re creation meet in a sing1e fjord; and indeed, this is a common occurence a10ng severa1 of the fjords in Scandinavia and Canada
Proceedings of the National Workshop on Effects of Habitat Alteration on Salmonid Stocks by Canada( Book )

8 editions published in 1989 in English and held by 96 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
Ecology of salmonids in estuaries around the world : adaptations, habitats, and conservation by Colin D Levings( Book )

4 editions published in 2016 in English and held by 85 WorldCat member libraries worldwide

"For centuries, biologists have marvelled at how anadromous salmonids--fish that pass from rivers into oceans and back again--survive as they migrate between these two very different environments. Yet, relatively little is understood about what happens to salmonid species (including salmon, steelhead, char, and trout) in the estuaries where they make this transition from fresh to saltwater. This book, written by one of the world's foremost experts on the ecology of salmonids, explains the critical role estuaries play in salmonid survival and recovery."--
Polychaetes recorded near two pulp mills on the coast of northern British Columbia : a preliminary taxonomic and ecological account by J. A Fournier( Book )

5 editions published in 1982 in English and held by 71 WorldCat member libraries worldwide

Two locations on the coast of northern British Columbia were sampled during the years 1972 to 1975 in an attempt to determine the long term effect of pulp mill wood waste on marine benthic communities. Polychaetes were dominant in most samples
The ecological consequences of dredging and dredge spoil disposal in Canadian waters by Colin D Levings( Book )

9 editions published in 1982 in English and held by 65 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 )

12 editions published between 1995 and 1996 in English and held by 48 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
An Account of an experimental release of marked juvenile Chinook to freshwater, estuarine, and marine habitats near Campbell River, B.C. by Canada( Book )

12 editions published between 1983 and 1984 in English and held by 45 WorldCat member libraries worldwide

Seasonal changes of inshore fish populations on Sturgeon and Roberts Bank, Fraser River estuary, British Columbia by D. K Gordon( Book )

10 editions published between 1983 and 1984 in English and held by 44 WorldCat member libraries worldwide

Short term use of a low tide refuge in a sandflat by juvenile chinook, (Oncorhynchus tshawytscha), Fraser River Estuary by Colin D Levings( Book )

10 editions published in 1982 in English and held by 38 WorldCat member libraries worldwide

An overview of habitat classification systems, ecological models, and geographic information systems applied to shallow foreshore marine habitats by Clifford L. K Robinson( Book )

6 editions published between 1995 and 1996 in English and held by 33 WorldCat member libraries worldwide

This report reviews habitat classification systems offering a set of procedures to identify, delimit, and describe the habitats of foreshore fishes, and ecological models describing relationships between habitat attributes such as vegetation type and fish properties such as biomass. Ecological models include fish-habitat models, which can be divided on the basis of mathematical approaches (index, simple qualitative, complex qualitative, regression, and probability functions) or structural approaches (species- and habitat-specific); trophodynamic models, which describe feeding interactions among fish in foreshore habitats (predator-prey, food-chain, and energy/nutrient flow models); and models that assess the role of specific fishes in terms of energy transfer within a single foreshore habitat, or models which provide a holistic view of how various habitats interact. The report concludes with a discussion on the use and utility of geographic information systems as a tool for developing models and systems for assessing fish habitat productive capacity
Demersal and benthic communities in Howe Sound basin and their responses to dissolved oxygen deficiency by Colin D Levings( Book )

9 editions published in 1980 in English and held by 32 WorldCat member libraries worldwide

Data report on effects of dissolved oxygen deficiency in bottom waters of Howe Sound : trawl data January 1978 to March 1979 and oceanographic data August 1977 to March 1979 by Colin D Levings( Book )

5 editions published in 1980 in English and held by 32 WorldCat member libraries worldwide

Trawl data documenting changes in communities of fish and epibenthic communities following dissolved oxygen depletion (D.O.) and replenishment in Howe Sound, B.C. are presented. Accompanying oceanographic data are provided, including plots of D.O. along the axis of the Sound for each sample date. These show patterns of incursions over the sill and subsequent D.O. utilization in Howe Sound basin
Experimental transplants of brackish and salt marsh species on the Fraser River Estuary by William Martin Pomeroy( Book )

9 editions published between 1981 and 1982 in English and held by 32 WorldCat member libraries worldwide

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

12 editions published between 1982 and 1983 in English and held by 31 WorldCat member libraries worldwide

Preliminary investigation on aquatic invasive species of marine and estuarine macrobenthic invertebrates on floating structures in five British Columbia harbours by Lin Lu( Book )

4 editions published in 2007 in English and held by 18 WorldCat member libraries worldwide

Samples of invertebrate communities on buoys and floating docks at Vancouver, Esquimalt, Namaimo, Port Alberni and Prince Rupert, British Columbia, were obtained in August and September 2005. The purpose of the preliminary survey was to provide baseline data on the taxonomic composition of the invertebrates, with specific reference to possible aquatic invasive species.--Document
Marine and estuarine riparian habitats and their role in coastal ecosystems, Pacific Region by Colin D Levings( Book )

6 editions published in 2001 in English and held by 13 WorldCat member libraries worldwide

This paper is an assessment of the fish habitat significance of a particular ecotone of the marine and estuarine shoreline in British Columbia- locations where aquatic habitat at higher tides merges into terrestrial habitat. Scientific data on these supralittoral areas, frequently called the "marine riparian" by managers are scarce in Pacific region. Habitat and ocean managers are dealing with uncertainty when assessing these areas in relation to forestry, urban development, and other industrial activities. There is evidence showing that unvegetated beach substrate in the marine riparian is used as spawning and incubation habitat for sandlance and surf smelt. Marine riparian is also recognized as rearing and migratory habitat for juvenile salmonids. Preliminary studies conducted at two locations in the Strait of Georgia in February and March 2001 showed that a variety of arthropods are potentially available as fish food from intact marine riparian habitats. The functional importance of marine riparian is likely to be related to food production, temperature regulation, wave energy absorption, and provision of structure as well as indirect ecological value. As an interim measure, based on the sparse available literature, we recommend that a site specific approach be taken to buffer zone widths to manage the marine riparian. Gravel, sand, or cobble beaches may be most susceptible to erosion and sediment sloughing from land, depending on backshore conditions. We also advise a careful review of the rationale, efficacy, and performance of the setback distances proposed in Clayoquot Sound and Puget Sound. Several focused research projects are recommended
Evaluation of ecological criteria for selecting MPAs in Pacific Region : a proposed semi-quantitative approach by Colin D Levings( Book )

5 editions published in 1999 in English and held by 4 WorldCat member libraries 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
Review of current practices to reduce the risk of introducing non-indigenous species into the Pacific Region via ballast water by Colin D Levings( Book )

4 editions published in 1999 in English 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
Chlorinated organic contaminants in benthic organisms of the lower Fraser River near Agassiz, British Columbia by John S Richardson( Book )

2 editions published in 1998 in English and held by 2 WorldCat member libraries worldwide

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Alternative Names
Levings, C.D.

Levings, C. D. (Colin D.)

Levings, Colin D.

English (149)