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. (1996;...
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Consejo Superior de Investigaciones Científicas
2001
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ftdoajarticles:oai:doaj.org/article:2234991b4f024d2cb53647199d1fbe80 2023-05-15T16:19:20+02:00 Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock Francisco E. Werner Brian R. MacKenzie R. Ian Perry R. Gregory Lough Christopher E. Naimie Brian O. Blaton John A. Quinlan 2001-07-01T00:00:00Z https://doi.org/10.3989/scimar.2001.65s199 https://doaj.org/article/2234991b4f024d2cb53647199d1fbe80 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/706 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.2001.65s199 https://doaj.org/article/2234991b4f024d2cb53647199d1fbe80 Scientia Marina, Vol 65, Iss S1, Pp 99-115 (2001) larval trophodynamics turbulence modelling cod haddock georges bank Aquaculture. Fisheries. Angling SH1-691 article 2001 ftdoajarticles https://doi.org/10.3989/scimar.2001.65s199 2022-12-31T14:36:28Z 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 Directory of Open Access Journals: DOAJ Articles Scientia Marina 65 S1 99 115 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
larval trophodynamics turbulence modelling cod haddock georges bank Aquaculture. Fisheries. Angling SH1-691 |
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larval trophodynamics turbulence modelling cod haddock georges bank Aquaculture. Fisheries. Angling SH1-691 Francisco E. Werner Brian R. MacKenzie R. Ian Perry R. Gregory Lough Christopher E. Naimie Brian O. Blaton John A. Quinlan Larval trophodynamics, turbulence, and drift on Georges Bank: A sensitivity analysis of Cod and Haddock |
topic_facet |
larval trophodynamics turbulence modelling cod haddock georges bank Aquaculture. Fisheries. Angling SH1-691 |
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. |
format |
Article in Journal/Newspaper |
author |
Francisco E. Werner Brian R. MacKenzie R. Ian Perry R. Gregory Lough Christopher E. Naimie Brian O. Blaton John A. Quinlan |
author_facet |
Francisco E. Werner Brian R. MacKenzie R. Ian Perry R. Gregory Lough Christopher E. Naimie Brian O. Blaton John A. Quinlan |
author_sort |
Francisco E. Werner |
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 |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
2001 |
url |
https://doi.org/10.3989/scimar.2001.65s199 https://doaj.org/article/2234991b4f024d2cb53647199d1fbe80 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Scientia Marina, Vol 65, Iss S1, Pp 99-115 (2001) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/706 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.2001.65s199 https://doaj.org/article/2234991b4f024d2cb53647199d1fbe80 |
op_doi |
https://doi.org/10.3989/scimar.2001.65s199 |
container_title |
Scientia Marina |
container_volume |
65 |
container_issue |
S1 |
container_start_page |
99 |
op_container_end_page |
115 |
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1766005709397295104 |