CORC at Cornell Project: Final Report

This is a PDF Web Archive of http://www.library.cornell.edu/staffweb/CORCFinalReport.htmlCORC?the Cooperative Online Research Cataloging project?is a collaborative research initiative of the OCLC Office of Research and about 150 participating institutions, including Cornell. It provides Web-accessible shared databases and automated tools to help libraries manage and provide intellectual access to the massive amount of material becoming available on the Web. The "CORC at Cornell" project was undertaken by a small, cross-functional research team of seven people. We worked on the project from mid-May to mid-November 1999. In the approximately 400 hours we spent on the project, we: (1) selected and cataloged about 120 new resources for the library catalog and Gateway; (2) experimented with a new workflow in which selectors, reference staff, and catalogers collaborated to create metadata; (3) gained practical experience with Dublin Core; (4) explored the features of CORC for creating subject guides (a.k.a. pathfinders); (5) evaluated the functions and features of the CORC system; (6) enhanced our abilities to select, manage and control electronic resources for the library

Density dependent catchability in bottom trawl surveys

Fish form schools, layer or patches in which the individual fish's behaviour is not independent of its neighbours movements. On the other hand, at low densities fish may have the freedom to act as single individuals independently of what other fish are doing. Potentially, if these contrasts occur in nature, they may give rise to behavioural differences of fish in front of the trawl at high and low densities with successive effects on catchability and bottom trawl indices of stock abundance. We explore in this paper the hypothesis that the density of fish has a significant effect on catchability of the survey trawl. Data from Norwegian and Canadian video observation recorded during trawling are studied, and related to bag trawl experiments which measured escapement underneath the survey trawls in both regions

Feasibility of using growth band counts in age determination of four crustacean species in the northern atlantic

The age information of commercially important species is crucial in fisheries management. Age of various fish and molluscan species has routinely been determined by counting annual growth bands deposited within the hard structures. In crustaceans such structures were previously believed to be lost and replaced due to molting. However, a technique was recently developed to use growth bands deposited in hard structure retained through molting as an age indicator. In the present study, the applicability of the novel technique is investigated for four crustacean species collected from Northern Atlantic for the first time: European lobster, Homarus gammarus (Linnaeus, 1758); Norway lobster, Nephrops norvegieus (Linnaeus, 1758); Atlantic rock crab, Cancer irroratus Say, 1817; and northern shrimp, Pandalus borealis (Kroyer, 1838). The gastric mill ossicles in the first three species were processed to show the growth bands while the eyestalk was used in the shrimp species. Four growth bands were visible in European lobster hatched in a Norwegian hatchery and maintained alive for four years before prior processing. Band counts in the other three species were identical to size-at-age interpretation determined from length-frequency analysis. Validation of the periodicity of annual deposition of growth bands is essential before applying the technique on a wider scale

Feasibility of using growth band counts in age determination of four crustacean species in the northern atlantic

The age information of commercially important species is crucial in fisheries management. Age of various fish and molluscan species has routinely been determined by counting annual growth bands deposited within the hard structures. In crustaceans such structures were previously believed to be lost and replaced due to molting. However, a technique was recently developed to use growth bands deposited in hard structure retained through molting as an age indicator. In the present study, the applicability of the novel technique is investigated for four crustacean species collected from Northern Atlantic for the first time: European lobster, Homarus gammarus (Linnaeus, 1758); Norway lobster, Nephrops norvegieus (Linnaeus, 1758); Atlantic rock crab, Cancer irroratus Say, 1817; and northern shrimp, Pandalus borealis (Kroyer, 1838). The gastric mill ossicles in the first three species were processed to show the growth bands while the eyestalk was used in the shrimp species. Four growth bands were visible in European lobster hatched in a Norwegian hatchery and maintained alive for four years before prior processing. Band counts in the other three species were identical to size-at-age interpretation determined from length-frequency analysis. Validation of the periodicity of annual deposition of growth bands is essential before applying the technique on a wider scale