Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers
Abstract Estimation of silver eel production, Anguilla anguilla L. , is fundamental for the management of eel stocks. In the hydropower‐regulated rivers Shannon and Erne, Ireland, production is calculated using catch data from a conservation trap and transport programme. However, in both rivers gaps...
Published in: | Fisheries Management and Ecology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/fme.12435 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12435 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12435 |
id |
crwiley:10.1111/fme.12435 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/fme.12435 2024-06-23T07:45:32+00:00 Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers Lenihan, Eamonn S. McCarthy, T. Kieran Lawton, Colin 2020 http://dx.doi.org/10.1111/fme.12435 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12435 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12435 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Management and Ecology volume 28, issue 1, page 53-64 ISSN 0969-997X 1365-2400 journal-article 2020 crwiley https://doi.org/10.1111/fme.12435 2024-06-04T06:45:50Z Abstract Estimation of silver eel production, Anguilla anguilla L. , is fundamental for the management of eel stocks. In the hydropower‐regulated rivers Shannon and Erne, Ireland, production is calculated using catch data from a conservation trap and transport programme. However, in both rivers gaps in silver eel catch datasets tend to occur, which can lead to biases in production estimates. Generalised additive models (GAMs) were used to model daily catch in these rivers based on a variety of environmental variables. Final models for the Shannon and Erne explained 83.7% and 78.8% of deviance in daily catch, respectively. A second model on the Erne included catch from a nearby fishing site in an attempt to increase explanatory power and explained 91.7% of deviance. Although model accuracy was increased, reliance on catch from another site may limit the applicability of the model. Model predictions were combined with estimates of fishing efficiency to predict production for the Shannon (36,210 kg; 0.85 kg/ha) and Erne (66,899–67,047 kg; 2.55–2.56 kg/ha). These values represented a 9.3% and 2.8%–3.0% increase on production estimated from incomplete catch records alone for the Shannon and Erne, respectively. Article in Journal/Newspaper Anguilla anguilla Wiley Online Library Fisheries Management and Ecology 28 1 53 64 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Estimation of silver eel production, Anguilla anguilla L. , is fundamental for the management of eel stocks. In the hydropower‐regulated rivers Shannon and Erne, Ireland, production is calculated using catch data from a conservation trap and transport programme. However, in both rivers gaps in silver eel catch datasets tend to occur, which can lead to biases in production estimates. Generalised additive models (GAMs) were used to model daily catch in these rivers based on a variety of environmental variables. Final models for the Shannon and Erne explained 83.7% and 78.8% of deviance in daily catch, respectively. A second model on the Erne included catch from a nearby fishing site in an attempt to increase explanatory power and explained 91.7% of deviance. Although model accuracy was increased, reliance on catch from another site may limit the applicability of the model. Model predictions were combined with estimates of fishing efficiency to predict production for the Shannon (36,210 kg; 0.85 kg/ha) and Erne (66,899–67,047 kg; 2.55–2.56 kg/ha). These values represented a 9.3% and 2.8%–3.0% increase on production estimated from incomplete catch records alone for the Shannon and Erne, respectively. |
format |
Article in Journal/Newspaper |
author |
Lenihan, Eamonn S. McCarthy, T. Kieran Lawton, Colin |
spellingShingle |
Lenihan, Eamonn S. McCarthy, T. Kieran Lawton, Colin Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers |
author_facet |
Lenihan, Eamonn S. McCarthy, T. Kieran Lawton, Colin |
author_sort |
Lenihan, Eamonn S. |
title |
Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers |
title_short |
Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers |
title_full |
Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers |
title_fullStr |
Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers |
title_full_unstemmed |
Modelling daily catches of silver‐phase European eel ( Anguilla anguilla) in two hydropower‐regulated rivers |
title_sort |
modelling daily catches of silver‐phase european eel ( anguilla anguilla) in two hydropower‐regulated rivers |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/fme.12435 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12435 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12435 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Fisheries Management and Ecology volume 28, issue 1, page 53-64 ISSN 0969-997X 1365-2400 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fme.12435 |
container_title |
Fisheries Management and Ecology |
container_volume |
28 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
64 |
_version_ |
1802640460357828608 |