Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys
Assessing the spawning abundance of marine fishes is difficult if spawning periods exceed the residency of individual fish on the spawning grounds. For Atlantic cod ( Gadus morhua ), which has a protracted spawning period, we use biotelemetric surveys to estimate the rate at which individual fish va...
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fthighwire:oai:open-archive.highwire.org:icesjms:59/2/254 2023-05-15T15:27:32+02:00 Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys Robichaud, David Rose, George A. 2002-01-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/59/2/254 https://doi.org/10.1006/jmsc.2001.1160 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/59/2/254 http://dx.doi.org/10.1006/jmsc.2001.1160 Copyright (C) 2002, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Regular Articles TEXT 2002 fthighwire https://doi.org/10.1006/jmsc.2001.1160 2013-05-27T03:29:33Z Assessing the spawning abundance of marine fishes is difficult if spawning periods exceed the residency of individual fish on the spawning grounds. For Atlantic cod ( Gadus morhua ), which has a protracted spawning period, we use biotelemetric surveys to estimate the rate at which individual fish vacate the spawning ground and develop a method to adjust multiple acoustic-survey results to account for spawner turnover. Two acoustic surveys conducted one month apart (May and June 1998) on a cod-spawning ground in Placentia Bay, Newfoundland, yielded abundance estimates of 220 000 and 210 000 fish of mean length 63 cm. Rates of evacuation from the spawning ground, observed over two separate spawning seasons, were modelled as logistic decay functions with good fit (r2=0.96 in 1998; r2=0.88 in 2000). Our method estimated that only 8.8% of the fish counted during the second survey were present during the first, and that between 400 976 and 420 842 fish were actually present over the full spawning season. Coupled telemetric and acoustic surveys could be used to estimate spawning abundance in many marine fishes. Text atlantic cod Gadus morhua Newfoundland HighWire Press (Stanford University) ICES Journal of Marine Science 59 2 254 260 |
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HighWire Press (Stanford University) |
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Regular Articles |
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Regular Articles Robichaud, David Rose, George A. Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
topic_facet |
Regular Articles |
description |
Assessing the spawning abundance of marine fishes is difficult if spawning periods exceed the residency of individual fish on the spawning grounds. For Atlantic cod ( Gadus morhua ), which has a protracted spawning period, we use biotelemetric surveys to estimate the rate at which individual fish vacate the spawning ground and develop a method to adjust multiple acoustic-survey results to account for spawner turnover. Two acoustic surveys conducted one month apart (May and June 1998) on a cod-spawning ground in Placentia Bay, Newfoundland, yielded abundance estimates of 220 000 and 210 000 fish of mean length 63 cm. Rates of evacuation from the spawning ground, observed over two separate spawning seasons, were modelled as logistic decay functions with good fit (r2=0.96 in 1998; r2=0.88 in 2000). Our method estimated that only 8.8% of the fish counted during the second survey were present during the first, and that between 400 976 and 420 842 fish were actually present over the full spawning season. Coupled telemetric and acoustic surveys could be used to estimate spawning abundance in many marine fishes. |
format |
Text |
author |
Robichaud, David Rose, George A. |
author_facet |
Robichaud, David Rose, George A. |
author_sort |
Robichaud, David |
title |
Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
title_short |
Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
title_full |
Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
title_fullStr |
Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
title_full_unstemmed |
Assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
title_sort |
assessing evacuation rates and spawning abundance of marine fishes using coupled telemetric and acoustic surveys |
publisher |
Oxford University Press |
publishDate |
2002 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/59/2/254 https://doi.org/10.1006/jmsc.2001.1160 |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/59/2/254 http://dx.doi.org/10.1006/jmsc.2001.1160 |
op_rights |
Copyright (C) 2002, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.2001.1160 |
container_title |
ICES Journal of Marine Science |
container_volume |
59 |
container_issue |
2 |
container_start_page |
254 |
op_container_end_page |
260 |
_version_ |
1766357965019807744 |