Salmon Aquaculture Sites Research Articles

Listening to the Salmon People: Coastal First Nations' Objectives Regarding Salmon Aquaculture in British Columbia

ABSTRACT The growth of salmon aquaculture on British Columbia's Pacific Coast is a source of substantial public controversy. Coastal indigenous people (First Nations), who have derived their culture and livelihood from wild salmon fisheries for thousands of years, have much at stake regarding salmon farm development in their traditional territories. This article considers the values of First Nations people regarding salmon aquaculture. It uses value-focused thinking, a problem-structure method from applied decision analysis, to characterize First Nations values about salmon aquaculture sites and facilities. It draws on interviews with First Nations people in four coastal communities, each of which has a different level of involvement in salmon aquaculture. The results can be used to create more attractive alternatives and to define information requirements for aquaculture decisions. The findings are an attempt to identify the criteria that should matter from the views of Coastal First Nations when making decisions about aquaculture development.

First Nations, Consultation, and the Rule of Law: Salmon Farming and Colonialism in British Columbia

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Dorothee Schreiber; First Nations, Consultation, and the Rule of Law: Salmon Farming and Colonialism in British Columbia. American Indian Culture and Research Journal 1 January 2006; 30 (4): 19–40. doi: https://doi.org/10.17953/aicr.30.4.t1h10246861230w6 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest Search

Metals in the green sea urchin (Strongylocentrotus droebrachiensis) as an indicator for the near-field effects of chemical wastes from salmon aquaculture sites in New Brunswick, Canada.

Metals in the green sea urchin (Strongylocentrotus droebrachiensis) as an indicator for the near-field effects of chemical wastes from salmon aquaculture sites in New Brunswick, Canada.

The effect of acoustic harassment devices on harbour porpoises ( Phocoena phocoena) in the Bay of Fundy, Canada

Many salmon aquaculture sites in the Bay of Fundy employ acoustic harassment devices (AHDs) to deter seals from approaching fish pens. These devices may also exclude harbour porpoises ( Phocoena phocoena) from important habitat. To determine the effects of AHDs on harbour porpoises an AHD was deployed experimentally in the Bay of Fundy, Canada. Relative porpoise abundance (visual scans) and porpoise movements (tracked by theodolite) were recorded for separate, daily, 2-h periods in the vicinity of either an active ( n=9) or inactive ( n=7) AHD. Fewer porpoises were sighted during active periods (0.22±0.44, mean±SD ) than inactive periods (2.91±1.29; P<0.05). The mean closest observed approach of porpoises to the AHD during active periods (991±302 m) was significantly greater than during inactive periods (364±261 m; P<0.01). Porpoise density was therefore reduced in the vicinity of active an AHD. These results should be considered before AHDs are deployed in porpoise habitat.

Polyculture of sea scallops (Placopecten magellanicus) suspended from salmon cages

Commercial and developmental operations for the culture of the seascallop, Placopecten magellanicus, are present in AtlanticCanada and New England. In an experiment designed to examine the commercialfeasibility of polyculture of scallops with Atlantic salmon(Salmosalar), we measured growth andsurvival of sea scallops grown in suspension at two salmon aquaculture sites innortheastern Maine (Johnson Cove (JC) and Treats Island (TI)). Sea scallop spatwere grown in pearl nets and deployed on drop lines containing ten nets inAugust 1994. One drop line of ten nets was sampled about every four months andscallops were counted, measured and weighed. Scallop tissues were also analysedfor paralytic shellfish toxins (PSP). The maximum level of PSP recorded duringthe study was 1174 μg STX equiv.·100 gtissue−1 (excluding adductor muscle weight). After one year,shell heights were 53.6 and 56.4 mm, growth rates were 0.11 and0.12 mm per day and wet adductor muscle weights were 3.3 and 4.1g (TI and JC, respectively). These growth rates were comparable tosea scallops grown in suspension culture to a nearby scallop aquaculture siteand other areas in Atlantic Canada. Reduced rates of survival were found duringthe latter part of the experiment and were attributable, in part, to heavyfouling, predators and high stocking density. The potential for supplementalincome, diversification of the salmon aquaculture industry, and feasibility ofculturing scallops at adjacent sites to salmon operations does exist.

Assessing benthic impacts of organic enrichment from marine aquaculture

Benthic observations were carried out at 22 stations in the Western Isles region of the Bay of Fundy on the east coast of Canada to evaluate impacts at salmon aquaculture sites. Eleven sites were located under salmon net-pens and 11 sites (reference or control locations) were at distances > 50 m from net-pens. Total S- and redox potential (Eh) in surface sediment and benthic O2 uptake and CO2 release were sensitive indicators of benthic organic enrichment. High variability between replicate measurements of sediment gas exchange could reflect spatial patchiness in sedimentation of fecal waste and food pellets under fish pens. Biomass of deposit feeders was significantly increased at cage sites but total macrofauna biomass was similar at cage and reference locations. Surface sediment water content, modal grain size, pore water salinity and sulfate, and total biomass of macrofauna were the least sensitive indicators of enrichment.