Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 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 1996. The primary instruments of acoustic data collection and processing were the S...
Main Authors: | , , , , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
ICES
1996
|
Subjects: | |
Online Access: | http://hdl.handle.net/11250/105627 |
id |
ftimr:oai:imr.brage.unit.no:11250/105627 |
---|---|
record_format |
openpolar |
spelling |
ftimr:oai:imr.brage.unit.no:11250/105627 2023-05-15T18:41:23+02:00 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 1996 application/pdf http://hdl.handle.net/11250/105627 eng eng ICES ICES CM Documents;1996/H:33 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105627 32 s. herring sild acoustics akustikk stock assessment bestandsberegning fish migration vandringer VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 Working paper 1996 ftimr 2021-09-23T20:16:15Z 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 1996. The primary instruments of acoustic data collection and processing were the SIMRAD EK500/38-kHz echo sounder and the Bergen Echo Integrator. Biological sampling was effected by means of a so-called MultiSampler pelagic trawl in addition to standard pelagic trawls. Compensation was made during postprocessing for the effect of acoustic extinction. The major complication of the survey and challenge of the analysis has been stratification. This is discussed in the context of (1) mixing of immature and mature year classes, each with its own behavioural characteristics apropos of diurnal vertical migration and outwards spawning migration, (2) degree of achieved survey coverage, depending on fjord geometry, navigational hazards, available time, and fish distribution, and (3) ongoing spawning migration. Because of various uncertainties, a series of abundance estimates is presented. These are accompanied by fitted variogram models and geostatistical variance estimates. Report Tysfjord Institute for Marine Research: Brage IMR Bergen Tysfjord ENVELOPE(16.374,16.374,68.097,68.097) Vestfjord ENVELOPE(-28.750,-28.750,70.500,70.500) |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
herring sild acoustics akustikk stock assessment bestandsberegning fish migration vandringer VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 |
spellingShingle |
herring sild acoustics akustikk stock assessment bestandsberegning fish migration vandringer VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 Foote, Kenneth G. Ostrowski, Marek Røttingen, Ingolf Engås, Arill Hansen, Kaare A. Hauge, Kjellrun Hiis Skeide, Roar L. Slotte, Aril Torgersen, Øyvind Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 |
topic_facet |
herring sild acoustics akustikk stock assessment bestandsberegning fish migration vandringer VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 |
description |
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 1996. The primary instruments of acoustic data collection and processing were the SIMRAD EK500/38-kHz echo sounder and the Bergen Echo Integrator. Biological sampling was effected by means of a so-called MultiSampler pelagic trawl in addition to standard pelagic trawls. Compensation was made during postprocessing for the effect of acoustic extinction. The major complication of the survey and challenge of the analysis has been stratification. This is discussed in the context of (1) mixing of immature and mature year classes, each with its own behavioural characteristics apropos of diurnal vertical migration and outwards spawning migration, (2) degree of achieved survey coverage, depending on fjord geometry, navigational hazards, available time, and fish distribution, and (3) ongoing spawning migration. Because of various uncertainties, a series of abundance estimates is presented. These are accompanied by fitted variogram models and geostatistical variance estimates. |
format |
Report |
author |
Foote, Kenneth G. Ostrowski, Marek Røttingen, Ingolf Engås, Arill Hansen, Kaare A. Hauge, Kjellrun Hiis Skeide, Roar L. Slotte, Aril Torgersen, Øyvind |
author_facet |
Foote, Kenneth G. Ostrowski, Marek Røttingen, Ingolf Engås, Arill Hansen, Kaare A. Hauge, Kjellrun Hiis Skeide, Roar L. Slotte, Aril Torgersen, Øyvind |
author_sort |
Foote, Kenneth G. |
title |
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 |
title_short |
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 |
title_full |
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 |
title_fullStr |
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 |
title_full_unstemmed |
Acoustic abundance estimation of the stock of Norwegian spring spawning herring, winter 1995- 1996 |
title_sort |
acoustic abundance estimation of the stock of norwegian spring spawning herring, winter 1995- 1996 |
publisher |
ICES |
publishDate |
1996 |
url |
http://hdl.handle.net/11250/105627 |
long_lat |
ENVELOPE(16.374,16.374,68.097,68.097) ENVELOPE(-28.750,-28.750,70.500,70.500) |
geographic |
Bergen Tysfjord Vestfjord |
geographic_facet |
Bergen Tysfjord Vestfjord |
genre |
Tysfjord |
genre_facet |
Tysfjord |
op_source |
32 s. |
op_relation |
ICES CM Documents;1996/H:33 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105627 |
_version_ |
1766230875575418880 |