Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock
Using an individual-based model approach we consider trophodynamic effects on the growth and survival of larval cod ( Gadus morhua ) and haddock ( Melanogrammus aeglefinus ) on Georges Bank during late winter/early spring. These studies represent an extension of results described in Werner et al. (1...
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ftcarolinadr:cdr.lib.unc.edu:9k41zp86k 2023-09-05T13:19:34+02:00 Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock Werner, Francisco MacKenzie, Brian Perry, R. Ian Lough, R. Gregory Naimie, Christopher Blaton, Brian Quinlan, John College of Arts and Sciences, Department of Marine Sciences 2001 https://doi.org/10.17615/75th-1932 https://cdr.lib.unc.edu/downloads/ww72bm64p?file=thumbnail https://cdr.lib.unc.edu/downloads/ww72bm64p English eng https://doi.org/10.17615/75th-1932 https://cdr.lib.unc.edu/downloads/ww72bm64p?file=thumbnail https://cdr.lib.unc.edu/downloads/ww72bm64p http://rightsstatements.org/vocab/InC/1.0/ Scientia Marina, 65(S1) SH1-691 haddock cod modelling Georges Bank turbulence larval trophodynamics Aquaculture. Fisheries. Angling Article 2001 ftcarolinadr https://doi.org/10.17615/75th-1932 2023-08-19T22:25:01Z Using an individual-based model approach we consider trophodynamic effects on the growth and survival of larval cod ( Gadus morhua ) and haddock ( Melanogrammus aeglefinus ) on Georges Bank during late winter/early spring. These studies represent an extension of results described in Werner et al. (1996; Deep-Sea Res. II), wherein the effect of turbulence-enhanced larval-prey contact rates increased the effective prey concentration resulting in growth of cod larvae consistent with observed rates in the field. We reformulated the feeding of the larvae to include existing relationships between maximum prey-length and larval-length and we examined: (i) larval search behaviour and its effect on encounter with prey, (ii) the ability of larvae to pursue and capture prey in a turbulent environment, and (iii) the effect of turbulence on the dispersion of larvae in the vertical. We find that search behaviour, the effect of turbulence on pursuit and capture, and vertical dispersion decrease the predicted larval growth rates compared to those observed in the earlier study. These results suggest that larval feeding behaviour, and especially the ability of larvae to pursue encountered prey, could be an important input to larval growth and survival models. The inclusion of turbulence in determining the position of passive larvae in the water column allows the larvae to sample the entire water column, contributing to a decrease in the variance of the size of the larvae over time. The ability of larvae to swim and aggregate in the vertical will be necessary to reproduce distributions observed in the field. Article in Journal/Newspaper Gadus morhua Carolina Digital Repository (UNC - University of North Carolina) |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
SH1-691 haddock cod modelling Georges Bank turbulence larval trophodynamics Aquaculture. Fisheries. Angling |
spellingShingle |
SH1-691 haddock cod modelling Georges Bank turbulence larval trophodynamics Aquaculture. Fisheries. Angling Werner, Francisco MacKenzie, Brian Perry, R. Ian Lough, R. Gregory Naimie, Christopher Blaton, Brian Quinlan, John Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
topic_facet |
SH1-691 haddock cod modelling Georges Bank turbulence larval trophodynamics Aquaculture. Fisheries. Angling |
description |
Using an individual-based model approach we consider trophodynamic effects on the growth and survival of larval cod ( Gadus morhua ) and haddock ( Melanogrammus aeglefinus ) on Georges Bank during late winter/early spring. These studies represent an extension of results described in Werner et al. (1996; Deep-Sea Res. II), wherein the effect of turbulence-enhanced larval-prey contact rates increased the effective prey concentration resulting in growth of cod larvae consistent with observed rates in the field. We reformulated the feeding of the larvae to include existing relationships between maximum prey-length and larval-length and we examined: (i) larval search behaviour and its effect on encounter with prey, (ii) the ability of larvae to pursue and capture prey in a turbulent environment, and (iii) the effect of turbulence on the dispersion of larvae in the vertical. We find that search behaviour, the effect of turbulence on pursuit and capture, and vertical dispersion decrease the predicted larval growth rates compared to those observed in the earlier study. These results suggest that larval feeding behaviour, and especially the ability of larvae to pursue encountered prey, could be an important input to larval growth and survival models. The inclusion of turbulence in determining the position of passive larvae in the water column allows the larvae to sample the entire water column, contributing to a decrease in the variance of the size of the larvae over time. The ability of larvae to swim and aggregate in the vertical will be necessary to reproduce distributions observed in the field. |
author2 |
College of Arts and Sciences, Department of Marine Sciences |
format |
Article in Journal/Newspaper |
author |
Werner, Francisco MacKenzie, Brian Perry, R. Ian Lough, R. Gregory Naimie, Christopher Blaton, Brian Quinlan, John |
author_facet |
Werner, Francisco MacKenzie, Brian Perry, R. Ian Lough, R. Gregory Naimie, Christopher Blaton, Brian Quinlan, John |
author_sort |
Werner, Francisco |
title |
Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
title_short |
Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
title_full |
Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
title_fullStr |
Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
title_full_unstemmed |
Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
title_sort |
larval trophodynamics, turbulence, and drift on georges bank: a sensitivity analysis of cod and haddock |
publishDate |
2001 |
url |
https://doi.org/10.17615/75th-1932 https://cdr.lib.unc.edu/downloads/ww72bm64p?file=thumbnail https://cdr.lib.unc.edu/downloads/ww72bm64p |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Scientia Marina, 65(S1) |
op_relation |
https://doi.org/10.17615/75th-1932 https://cdr.lib.unc.edu/downloads/ww72bm64p?file=thumbnail https://cdr.lib.unc.edu/downloads/ww72bm64p |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/75th-1932 |
_version_ |
1776200354190327808 |