Composition of the Incidental Kill of Cetaceans in Two
In July 1990, an observer program was established to collect data on the bycatch of the drift and set gillnet fisheries operating off the coast of California. These data are used for estimating mortality and for further studies of the biology of the species impacted. To date. 16 species of Cetacea h...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.498.7589 2023-05-15T16:33:21+02:00 Composition of the Incidental Kill of Cetaceans in Two California Gillnet Fisl~eries Susan J. Chivers Kelly M. Robertson Michael D. Henshaw The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.498.7589 http://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Programs/Photogrammetry/1997_CAGillnetIncidentalKill_1990-1995.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.498.7589 http://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Programs/Photogrammetry/1997_CAGillnetIncidentalKill_1990-1995.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Programs/Photogrammetry/1997_CAGillnetIncidentalKill_1990-1995.pdf INCIDENTAL CATCH COMMON DOLPHIN HARBOUR PORPOISE GILLNETS NORTHEASTERN PACIFIC text ftciteseerx 2016-01-08T08:55:44Z In July 1990, an observer program was established to collect data on the bycatch of the drift and set gillnet fisheries operating off the coast of California. These data are used for estimating mortality and for further studies of the biology of the species impacted. To date. 16 species of Cetacea have been identified in the observed incidental kill of the gillnet fisheries. In the drift gillnet fishery, observers reported 348 cetaceans incidentally killed, and biological samples were collected from 83.6 % of these animals. The common dolphin, Delphinus delphis, was the most frequently observed species entangled in the drift gillnet fishing gear and comprised 48.6 % of the observed incidental kill. In the set gillnet fishery, 20 cetaceans were observed killed, and biological samples were collected from five of these animals. The harbour porpoise, Phocoenaphocoena. was the most frequently observed species entangled in set gillnet gear and comprised 80 % of the observed incidental kill. In this report, we summarise, by species, the age, the total body length and the sex composition of cetaceans sampled from the incidental kill in the drift gillnet fishery between July 1990 and December 1995, and in the set gillnet fishery hetween July 1990 and December 1994. We also demonstrate the value of collecting small samples of skin tissue for confirming species identification using molecular genetic techniques. Text Harbour porpoise Unknown Pacific |
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ftciteseerx |
language |
English |
topic |
INCIDENTAL CATCH COMMON DOLPHIN HARBOUR PORPOISE GILLNETS NORTHEASTERN PACIFIC |
spellingShingle |
INCIDENTAL CATCH COMMON DOLPHIN HARBOUR PORPOISE GILLNETS NORTHEASTERN PACIFIC California Gillnet Fisl~eries Susan J. Chivers Kelly M. Robertson Michael D. Henshaw Composition of the Incidental Kill of Cetaceans in Two |
topic_facet |
INCIDENTAL CATCH COMMON DOLPHIN HARBOUR PORPOISE GILLNETS NORTHEASTERN PACIFIC |
description |
In July 1990, an observer program was established to collect data on the bycatch of the drift and set gillnet fisheries operating off the coast of California. These data are used for estimating mortality and for further studies of the biology of the species impacted. To date. 16 species of Cetacea have been identified in the observed incidental kill of the gillnet fisheries. In the drift gillnet fishery, observers reported 348 cetaceans incidentally killed, and biological samples were collected from 83.6 % of these animals. The common dolphin, Delphinus delphis, was the most frequently observed species entangled in the drift gillnet fishing gear and comprised 48.6 % of the observed incidental kill. In the set gillnet fishery, 20 cetaceans were observed killed, and biological samples were collected from five of these animals. The harbour porpoise, Phocoenaphocoena. was the most frequently observed species entangled in set gillnet gear and comprised 80 % of the observed incidental kill. In this report, we summarise, by species, the age, the total body length and the sex composition of cetaceans sampled from the incidental kill in the drift gillnet fishery between July 1990 and December 1995, and in the set gillnet fishery hetween July 1990 and December 1994. We also demonstrate the value of collecting small samples of skin tissue for confirming species identification using molecular genetic techniques. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
California Gillnet Fisl~eries Susan J. Chivers Kelly M. Robertson Michael D. Henshaw |
author_facet |
California Gillnet Fisl~eries Susan J. Chivers Kelly M. Robertson Michael D. Henshaw |
author_sort |
California Gillnet Fisl~eries |
title |
Composition of the Incidental Kill of Cetaceans in Two |
title_short |
Composition of the Incidental Kill of Cetaceans in Two |
title_full |
Composition of the Incidental Kill of Cetaceans in Two |
title_fullStr |
Composition of the Incidental Kill of Cetaceans in Two |
title_full_unstemmed |
Composition of the Incidental Kill of Cetaceans in Two |
title_sort |
composition of the incidental kill of cetaceans in two |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.498.7589 http://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Programs/Photogrammetry/1997_CAGillnetIncidentalKill_1990-1995.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Harbour porpoise |
genre_facet |
Harbour porpoise |
op_source |
http://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Programs/Photogrammetry/1997_CAGillnetIncidentalKill_1990-1995.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.498.7589 http://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Programs/Photogrammetry/1997_CAGillnetIncidentalKill_1990-1995.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766023054170783744 |