Hydroacoustic Signal Classification of Fish Schools by Species
Features extracted from hydroacoustic backscatter from fish schools enabled classification by species. Target species were cod (Gadus morhua), capelin (Mallotus villosus), and mackerel (Scomber scombrus), observed in the northern Gulf of St. Lawrence during 1985–86. Two features of internal school d...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1988
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f88-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-073 |
id |
crcansciencepubl:10.1139/f88-073 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f88-073 2023-12-17T10:30:23+01:00 Hydroacoustic Signal Classification of Fish Schools by Species Rose, G. A. Leggett, W. C. 1988 http://dx.doi.org/10.1139/f88-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-073 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 4, page 597-604 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1988 crcansciencepubl https://doi.org/10.1139/f88-073 2023-11-19T13:38:56Z Features extracted from hydroacoustic backscatter from fish schools enabled classification by species. Target species were cod (Gadus morhua), capelin (Mallotus villosus), and mackerel (Scomber scombrus), observed in the northern Gulf of St. Lawrence during 1985–86. Two features of internal school density (20 log R amplification) were the best discriminators. These were mean standardized peak to trough distance (SPT) and mean distance between voltage peaks (PP). Quadratic discriminant functions based on the variables SPT, PP, an inverse coefficient of variation, school depth, and off-bottom distance correctly classified 93% of schools (1986). These functions also correctly classified 93% of cod and capelin schools acoustically sampled independently during 1985. The target strength of individual fish was a less successful discriminator of species. For cod and capelin of known length, average target strength (TS) was a linear function of length: TS (decibels) = −65 + 20 log 10 length (centimetres). Mackerel had target strengths that were 8–12 dB less than those of cod of equivalent length. Quadratic discriminant functions based on target strength, school depth, and off-bottom distance correctly classified 77% of schools by species. Our methods are generalized to any schooling species or environment. Article in Journal/Newspaper Gadus morhua Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 45 4 597 604 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Rose, G. A. Leggett, W. C. Hydroacoustic Signal Classification of Fish Schools by Species |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Features extracted from hydroacoustic backscatter from fish schools enabled classification by species. Target species were cod (Gadus morhua), capelin (Mallotus villosus), and mackerel (Scomber scombrus), observed in the northern Gulf of St. Lawrence during 1985–86. Two features of internal school density (20 log R amplification) were the best discriminators. These were mean standardized peak to trough distance (SPT) and mean distance between voltage peaks (PP). Quadratic discriminant functions based on the variables SPT, PP, an inverse coefficient of variation, school depth, and off-bottom distance correctly classified 93% of schools (1986). These functions also correctly classified 93% of cod and capelin schools acoustically sampled independently during 1985. The target strength of individual fish was a less successful discriminator of species. For cod and capelin of known length, average target strength (TS) was a linear function of length: TS (decibels) = −65 + 20 log 10 length (centimetres). Mackerel had target strengths that were 8–12 dB less than those of cod of equivalent length. Quadratic discriminant functions based on target strength, school depth, and off-bottom distance correctly classified 77% of schools by species. Our methods are generalized to any schooling species or environment. |
format |
Article in Journal/Newspaper |
author |
Rose, G. A. Leggett, W. C. |
author_facet |
Rose, G. A. Leggett, W. C. |
author_sort |
Rose, G. A. |
title |
Hydroacoustic Signal Classification of Fish Schools by Species |
title_short |
Hydroacoustic Signal Classification of Fish Schools by Species |
title_full |
Hydroacoustic Signal Classification of Fish Schools by Species |
title_fullStr |
Hydroacoustic Signal Classification of Fish Schools by Species |
title_full_unstemmed |
Hydroacoustic Signal Classification of Fish Schools by Species |
title_sort |
hydroacoustic signal classification of fish schools by species |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/f88-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-073 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 4, page 597-604 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f88-073 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
45 |
container_issue |
4 |
container_start_page |
597 |
op_container_end_page |
604 |
_version_ |
1785583348563836928 |