Browsing Brage IMR by Author "Foote, Kenneth G."
Now showing items 1-20 of 132
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Absorption term in time-varied-gain functions
Foote, Kenneth G. (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1981)A potential source of error in acoustic measurements of fish density is the absorption part of time-varied-gain functions. This should be determined from the 1977 Fisher and Simmons equation. Use of its predecessor, the ... -
Abundance estimation of herring hibernating in a fjord
Foote, Kenneth G. (ICES CM Documents;1993/D:45, Working paper, 1993)A series of acoustic surveys of the adult component of the Norwegian spring-spawning herring was conducted in Ofotfjorden and Tysfjorden in December 1992. Preliminary results are reported. These include compensation for ... -
Abundance estimation of Norwegian spring spawning herring wintering in the Vestfjord system, December 1996
Ostrowski, Marek; Foote, Kenneth G.; Røttingen, Ingolf; Slotte, Aril (ICES CM Documents;1997/FF:13, Working paper, 1997)The spawning stock of Norwegian spawning herring has been surveyed when wintering in the Vestfjord, Tysfjord, and Ofotfjord, in northem Norway in December 1996. The basic method is that of echo integration, with compensation ... -
Abundance estimation of pelagic fish stocks by acoustic surveying
Foote, Kenneth G. (ICES CM Documents;1991/B:33, Working paper, 1991)The echo integration technique is outlined. Weaknesses are identified and remedies described. While the technique is adequate for surveying some stocks, improvements are necessary for its proper application to others. ... -
Acoustic abundance estimation of midwater animals
Foote, Kenneth G.; Røttingen, Ingolf (Journal article; Peer reviewed, 1999) -
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996
Foote, Kenneth G.; Ostrowski, Marek; Røttingen, Ingolf; Engås, Arill; Hansen, Kaare A.; Hauge, Kjellrun Hiis; Skeide, Roar L.; Slotte, Aril; Torgersen, Øyvind (ICES CM Documents;1996/H:33, Working paper, 1996)Standard echo integration methodology has been applied to the stock of Norwegian spring spawning herring (Clupea harengus) wintering in the Ofotfjord-Tysfjord-Vestfjord system during late autumn 1995 and early winter ... -
Acoustic abundance estimation of wintering Norwegian spring spawning herring, with emphasis on methodological aspects
Røttingen, Ingolf; Foote, Kenneth G.; Huse, Ingvar; Ona, Egil (ICES CM Documents;1994/(B+D+G+H):1, Working paper, 1994)The spawning component and part of the juvenile stock of Norwegian spring spawning herring have been wintering in a fjord system in northern Norway in recent years. Conditions for measuring the stock size have been ... -
Acoustic assessment of Norwegian spring spawning herring in the wintering area, December 1995 and January 1995
Foote, Kenneth G.; Røttingen, Ingolf (ICES CM Documents;1995/H:9, Working paper, 1995)The abundance of the mature component of the stock of Norwegian spring spawning herring has been estimated based on a series of echo integration surveys. These were performed in the wintering area of Ofotfjord, Tysfjord, and ... -
Acoustic detectability of squid egg beds
Foote, Kenneth G.; Hanlon, Roger T.; Henry, Annette E.; Hochstaedter, Alfred; Kvitek, Rikk G.; Sullivan, Deidre; Yogozawa, Yuko (Others, 2003) -
Acoustic detection and quantification of benthic egg beds of the squid Loligo opalescens in Monterey Bay, California
Foote, Kenneth G.; Hanlon, Roger T.; Iampietro, Pat J.; Kvitek, Rikk G. (Journal article; Peer reviewed, 2006)The squid Loligo opalescens is a key species in the nearshore pelagic community of California, supporting the most valuable state marine fishery, yet the stock biomass is unknown. In southern Monterey Bay, extensive beds ... -
Acoustic investigation of fish behaviour apropos avoidance reaction
Foote, Kenneth G. (ICES CM Documents;1981/B:21, Working paper, 1981) -
Acoustic mapping of squid egg clusters and their bottom habitat in Monterey Bay, California
Foote, Kenneth G.; Hanlon, Roger T.; Iampietro, Pat J.; Kvitek, Rikk G. (Others, 2004) -
Acoustic portrait of herring in Vestfjord, january 1996, with geostatistical analysis
Foote, Kenneth G.; Ostrowski, Marek (ICES CM Documents;1996/H:31, Working paper, 1996)In January 1996 the stock of Norwegian spring-spawning herring (Clupea harengus) was acoustically surveyed in the wintering area. Both immature and mature fish were present. Because of the comparative lateness of the ... -
Acoustic quantification of fish in the riverine environment: Challenges
Foote, Kenneth G. (Others, 2005) -
Acoustic resonance determination of the rigidity modulus
Foote, Kenneth G. (Others, 2001) -
Acoustic sampling volume
Foote, Kenneth G. (Journal article; Peer reviewed, 1991)Knowledge of the acoustic sampling volume is necessary in many quantitative applications of acoustics. In general, the sampling volume is not merely a characteristic of the transmitting and receiving transducers, but also ... -
Acoustic sampling volume
Foote, Kenneth G. (Others, 1989) -
Acoustic sampling volume for cod
Foote, Kenneth G. (ICES CM Documents;1989/B:5, Working paper, 1989)This is expressed through the effective equivalent beam angle * for cod as represented by measurements of the tilt angle dependence of target strength. The functional form of * is approximated for each of several behaviour ... -
Acoustic sampling volume of a bistatic sonar
Foote, Kenneth G. (Others, 2005) -
Acoustic sampling volume versus equivalent beam angle
Foote, Kenneth G. (ICES CM Documents;1988/B:5, Working paper, 1988)Irnprovements in target strength measurement have shown the equivalent beam angle (EBA) to be a worrisome source of error in echo integrator surveys. The reason is that the EBA is generally defined as a purely physical ...