Acoustic data collected on pelagic fishing vessels throughout an annual cycle: Operational framework, interpretation of observations, and future perspectives

S.M.M. Fassler, T.P.A. Brunel, S. Gastauer, D. Burggraaf

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

Acoustic data collection trials on pelagic freezer-trawlers were realised in 2012 during several fishing trips targeting blue whiting west of the British Isles in spring, North Sea herring in summer, and horse mackerel in the English Channel and Celtic Sea in autumn. Echosounders were calibrated and time- and position-stamped data logged along the path covered by the vessels. The acoustic detections recorded during different types of trawler activity within a fishing trip (‘searching’, ‘stationary’, and ‘fishing’) were compared between target species. The highest proportion of time spent for activity ‘fishing’ was observed in the blue whiting fishery (82%), while that value was lower in the horse mackerel and herring fishery (68% and 54%). In all fisheries the quantified mean fish densities recorded were significantly higher during ‘fishing’ than during ‘searching’. Changes in recorded fish density magnitudes over time before and after trawling also showed different patterns between fisheries. The quantified peculiarities exhibited by the specific fishing trip data is discussed in light of incorporating them in monitoring programs and analysis methods that can advance ecosystem understanding. Potential future approaches for analysis methods of opportunistically recorded acoustic fishing vessel data are discussed.
Original languageEnglish
Pages (from-to)39-46
JournalFisheries Research
Volume178
DOIs
Publication statusPublished - 2016

Fingerprint

fishing vessel
acoustic data
fishing boats
annual cycle
acoustics
fishing
fisheries
Micromesistius poutassou
mackerel
herring
fishery
horse
English Channel
freezers
British Isles
fish
North Sea
trawling
autumn
targeting

Cite this

@article{94e10c509a2e4887b58aa0e9e1f5806f,
title = "Acoustic data collected on pelagic fishing vessels throughout an annual cycle: Operational framework, interpretation of observations, and future perspectives",
abstract = "Acoustic data collection trials on pelagic freezer-trawlers were realised in 2012 during several fishing trips targeting blue whiting west of the British Isles in spring, North Sea herring in summer, and horse mackerel in the English Channel and Celtic Sea in autumn. Echosounders were calibrated and time- and position-stamped data logged along the path covered by the vessels. The acoustic detections recorded during different types of trawler activity within a fishing trip (‘searching’, ‘stationary’, and ‘fishing’) were compared between target species. The highest proportion of time spent for activity ‘fishing’ was observed in the blue whiting fishery (82{\%}), while that value was lower in the horse mackerel and herring fishery (68{\%} and 54{\%}). In all fisheries the quantified mean fish densities recorded were significantly higher during ‘fishing’ than during ‘searching’. Changes in recorded fish density magnitudes over time before and after trawling also showed different patterns between fisheries. The quantified peculiarities exhibited by the specific fishing trip data is discussed in light of incorporating them in monitoring programs and analysis methods that can advance ecosystem understanding. Potential future approaches for analysis methods of opportunistically recorded acoustic fishing vessel data are discussed.",
author = "S.M.M. Fassler and T.P.A. Brunel and S. Gastauer and D. Burggraaf",
year = "2016",
doi = "10.1016/j.fishres.2015.10.020",
language = "English",
volume = "178",
pages = "39--46",
journal = "Fisheries Research",
issn = "0165-7836",
publisher = "Elsevier",

}

Acoustic data collected on pelagic fishing vessels throughout an annual cycle: Operational framework, interpretation of observations, and future perspectives. / Fassler, S.M.M.; Brunel, T.P.A.; Gastauer, S.; Burggraaf, D.

In: Fisheries Research, Vol. 178, 2016, p. 39-46.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Acoustic data collected on pelagic fishing vessels throughout an annual cycle: Operational framework, interpretation of observations, and future perspectives

AU - Fassler, S.M.M.

AU - Brunel, T.P.A.

AU - Gastauer, S.

AU - Burggraaf, D.

PY - 2016

Y1 - 2016

N2 - Acoustic data collection trials on pelagic freezer-trawlers were realised in 2012 during several fishing trips targeting blue whiting west of the British Isles in spring, North Sea herring in summer, and horse mackerel in the English Channel and Celtic Sea in autumn. Echosounders were calibrated and time- and position-stamped data logged along the path covered by the vessels. The acoustic detections recorded during different types of trawler activity within a fishing trip (‘searching’, ‘stationary’, and ‘fishing’) were compared between target species. The highest proportion of time spent for activity ‘fishing’ was observed in the blue whiting fishery (82%), while that value was lower in the horse mackerel and herring fishery (68% and 54%). In all fisheries the quantified mean fish densities recorded were significantly higher during ‘fishing’ than during ‘searching’. Changes in recorded fish density magnitudes over time before and after trawling also showed different patterns between fisheries. The quantified peculiarities exhibited by the specific fishing trip data is discussed in light of incorporating them in monitoring programs and analysis methods that can advance ecosystem understanding. Potential future approaches for analysis methods of opportunistically recorded acoustic fishing vessel data are discussed.

AB - Acoustic data collection trials on pelagic freezer-trawlers were realised in 2012 during several fishing trips targeting blue whiting west of the British Isles in spring, North Sea herring in summer, and horse mackerel in the English Channel and Celtic Sea in autumn. Echosounders were calibrated and time- and position-stamped data logged along the path covered by the vessels. The acoustic detections recorded during different types of trawler activity within a fishing trip (‘searching’, ‘stationary’, and ‘fishing’) were compared between target species. The highest proportion of time spent for activity ‘fishing’ was observed in the blue whiting fishery (82%), while that value was lower in the horse mackerel and herring fishery (68% and 54%). In all fisheries the quantified mean fish densities recorded were significantly higher during ‘fishing’ than during ‘searching’. Changes in recorded fish density magnitudes over time before and after trawling also showed different patterns between fisheries. The quantified peculiarities exhibited by the specific fishing trip data is discussed in light of incorporating them in monitoring programs and analysis methods that can advance ecosystem understanding. Potential future approaches for analysis methods of opportunistically recorded acoustic fishing vessel data are discussed.

U2 - 10.1016/j.fishres.2015.10.020

DO - 10.1016/j.fishres.2015.10.020

M3 - Article

VL - 178

SP - 39

EP - 46

JO - Fisheries Research

JF - Fisheries Research

SN - 0165-7836

ER -