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Literature
        

Review of the literature is an essential starting point for any endeavour in GIS, remote sensing, or mapping. Yet, reviews are often incomplete for lack of access to the material, and consequently projects experience durations that are longer and costs that are higher than need be because the accumulated knowledge has not been tapped and taken advantage of. This page sets out to mitigate that problem. It is a gateway to the literature that represents much of the accumulated global experience on using GIS, remote sensing and mapping to solve problems and issues in marine fisheries with emphasis on EAF.

Spatial issues addressed most frequently for marine fisheries are listed in table at issues section along with the number of literature records currently contained in GISFish databases.

 
  
Marine Fisheries Documents  (297) Inland Fisheries Documents  (247) Web Resources  (114)
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TitleAssessing patterns of juvenile coho salmon (Oncorhynchus kisutch) occupancy: A stream network perspective
AuthorRebecca L. Flitcroft, Gordon H. Reeves and Lisa M. Ganio
Date12 December 2008
Content Language(s)English
Abstract / DescriptionAnalyzing streams as networks offers a realistic and holistic perspective for assessments of the movement and distribution by aquatic species in response to life history needs and environmental conditions. However, network analysis is challenging and rarely accomplished due to limited analytical techniques that include network relationships and the need for data throughout an entire stream network. In this study, a geographic information system facilitated a network analysis by allowing for the automated calculation of network distances and metrics that represent spatial configuration. Analysis of the distribution of juvenile coho salmon (O. kisutch) was investigated in eleven subbasins of Oregon’s Mid-Coast over a five year period. Census style snorkel counts of juvenile fish and habitat survey information were attached to linework in a geographic information system. The geographic information system was then used to calculate metrics that represent spatial position in the stream network such as stream order and distance to the mouth. Also, distances that followed stream channels were calculated between snorkel sites and important seasonal habitats for juvenile coho. This more closely approximates survival conditions for juvenile coho and avoids measurements of Euclidean or Manhattan distances that is common in terrestrial analysis and is often employed in the analysis of aquatic riverscapes. Further, the GIS calculated network distance matrices that were used in variograms to define group or patch sizes of juvenile coho salmon. Analysis of network distances among seasonal habitats indicates that juvenile coho density may be higher where the distance between habitats is low. Analysis of the patches of juvenile coho salmon indicated that watershed size appears to influence patch size and large watersheds may exhibit a nested organizational structure in the distribution of juvenile coho salmon. The results of these network analyses indicate that watershed restoration or management efforts and expectations may need to consider watershed size and the configuration, as well as the presence, of necessary seasonal habitats. A geographic information system made possible the calculation of network distances and automated calculation of metrics that were critical in the exploration of habitat configuration and juvenile coho stream use throughout a stream network.

Abstract presented at the Fourth International Symposium on GIS/Spatial Analysis in Fishery and Aquatic Sciences in Rio de Janeiro, Brazil, from 25–29 August 2008.

PublisherFishery-Aquatic GIS Research Group
Publication LocationJapan
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Keywords GIS
Spatial Tool GIS
Country UNITED STATES
Species Common Name
Species Scientific Name
Organism Division (FAO ISSCAAP) Freshwater fishes
Production System Inland Fisheries
Water System Stream
Main Sector Fisheries
Main Issue Addressed Classification and Inventory of Habitats
  
63 Topics - 1639 Knowledge Objects - 323 Members - 6 Editors
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