Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg
The Celtic Sea is a productive fishing ground, therefore identifying the relative importance of fishing and environmental factors on fish stock dynamics is crucial for developing our understanding of sustainable yields and to operationalize Ecosystem Based Fisheries Management (EBFM). We investigate...
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ftfrontimediafig:oai:figshare.com:article/21090979 2023-05-15T15:47:58+02:00 Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg Jed Kempf Patricia Breen Emer Rogan David G. Reid 2022-09-13T14:06:06Z https://doi.org/10.3389/fmars.2022.978654.s004 https://figshare.com/articles/figure/Image_4_Trends_in_the_abundance_of_Celtic_Sea_demersal_fish_Identifying_the_relative_importance_of_fishing_and_environmental_drivers_jpeg/21090979 unknown doi:10.3389/fmars.2022.978654.s004 https://figshare.com/articles/figure/Image_4_Trends_in_the_abundance_of_Celtic_Sea_demersal_fish_Identifying_the_relative_importance_of_fishing_and_environmental_drivers_jpeg/21090979 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ecosystem assessment ecosystem based fisheries management Calanus finmarchicus dynamic factor analysis International Bottom Trawl Survey Image Figure 2022 ftfrontimediafig https://doi.org/10.3389/fmars.2022.978654.s004 2022-09-14T23:06:12Z The Celtic Sea is a productive fishing ground, therefore identifying the relative importance of fishing and environmental factors on fish stock dynamics is crucial for developing our understanding of sustainable yields and to operationalize Ecosystem Based Fisheries Management (EBFM). We investigated the effect of environmental variables and fishing on the relative abundance inferred from catch-per-unit-effort (CPUE), of twelve demersal stocks (i.e., cod, haddock, whiting, anglerfish, hake, megrim, plaice, sole, lesser-spotted dogfish, spurdog, Trisopterus spp., skates and rays) in the Celtic Sea from 1997 to 2019 (23 years). Annualized time series (1997-2019) of net primary production, bottom temperature, copepod abundance (Calanus finmarchicus and Calanus helgolandicus) and North Atlantic Oscillation index were used to characterize key environmental variables. Fishing exploitation rates (F/F MSY ) were used to represent fishing pressure and CPUE trends derived from an International Bottom Trawl Survey (IBTS) were used to infer abundance. We used redundancy analysis to identify key explanatory variables and then dynamic factor analysis to assess their relationships with the CPUE series and identify underlying patterns in the unexplained temporal variation. Our results show that for the majority of demersal fish species, the CPUE trends were strongly influenced by fishing exploitation rates. The gradual reduction in exploitation rates observed throughout the study period most likely led to the partial recovery of cod, spurdog, hake, megrim, plaice, whiting, Trisopterus spp., and the skates and rays. In addition, exploitation patterns on one stock influenced CPUE trends of other demersal stocks (e.g., hake, megrim, plaice, lesser-spotted dogfish, sole). We also observed that the CPUE of whiting, hake and plaice increased when C. finmarchicus were abundant in the plankton. We infer from our findings in the investigated time series that the recovery of cod, spurdog, hake, megrim, plaice, whiting, Trisopterus spp., ... Still Image Calanus finmarchicus North Atlantic North Atlantic oscillation Frontiers: Figshare Fishing Ground ENVELOPE(-55.848,-55.848,49.550,49.550) Hake ENVELOPE(15.612,15.612,66.797,66.797) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ecosystem assessment ecosystem based fisheries management Calanus finmarchicus dynamic factor analysis International Bottom Trawl Survey |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ecosystem assessment ecosystem based fisheries management Calanus finmarchicus dynamic factor analysis International Bottom Trawl Survey Jed Kempf Patricia Breen Emer Rogan David G. Reid Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ecosystem assessment ecosystem based fisheries management Calanus finmarchicus dynamic factor analysis International Bottom Trawl Survey |
description |
The Celtic Sea is a productive fishing ground, therefore identifying the relative importance of fishing and environmental factors on fish stock dynamics is crucial for developing our understanding of sustainable yields and to operationalize Ecosystem Based Fisheries Management (EBFM). We investigated the effect of environmental variables and fishing on the relative abundance inferred from catch-per-unit-effort (CPUE), of twelve demersal stocks (i.e., cod, haddock, whiting, anglerfish, hake, megrim, plaice, sole, lesser-spotted dogfish, spurdog, Trisopterus spp., skates and rays) in the Celtic Sea from 1997 to 2019 (23 years). Annualized time series (1997-2019) of net primary production, bottom temperature, copepod abundance (Calanus finmarchicus and Calanus helgolandicus) and North Atlantic Oscillation index were used to characterize key environmental variables. Fishing exploitation rates (F/F MSY ) were used to represent fishing pressure and CPUE trends derived from an International Bottom Trawl Survey (IBTS) were used to infer abundance. We used redundancy analysis to identify key explanatory variables and then dynamic factor analysis to assess their relationships with the CPUE series and identify underlying patterns in the unexplained temporal variation. Our results show that for the majority of demersal fish species, the CPUE trends were strongly influenced by fishing exploitation rates. The gradual reduction in exploitation rates observed throughout the study period most likely led to the partial recovery of cod, spurdog, hake, megrim, plaice, whiting, Trisopterus spp., and the skates and rays. In addition, exploitation patterns on one stock influenced CPUE trends of other demersal stocks (e.g., hake, megrim, plaice, lesser-spotted dogfish, sole). We also observed that the CPUE of whiting, hake and plaice increased when C. finmarchicus were abundant in the plankton. We infer from our findings in the investigated time series that the recovery of cod, spurdog, hake, megrim, plaice, whiting, Trisopterus spp., ... |
format |
Still Image |
author |
Jed Kempf Patricia Breen Emer Rogan David G. Reid |
author_facet |
Jed Kempf Patricia Breen Emer Rogan David G. Reid |
author_sort |
Jed Kempf |
title |
Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg |
title_short |
Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg |
title_full |
Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg |
title_fullStr |
Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg |
title_full_unstemmed |
Image_4_Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers.jpeg |
title_sort |
image_4_trends in the abundance of celtic sea demersal fish: identifying the relative importance of fishing and environmental drivers.jpeg |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.978654.s004 https://figshare.com/articles/figure/Image_4_Trends_in_the_abundance_of_Celtic_Sea_demersal_fish_Identifying_the_relative_importance_of_fishing_and_environmental_drivers_jpeg/21090979 |
long_lat |
ENVELOPE(-55.848,-55.848,49.550,49.550) ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Fishing Ground Hake |
geographic_facet |
Fishing Ground Hake |
genre |
Calanus finmarchicus North Atlantic North Atlantic oscillation |
genre_facet |
Calanus finmarchicus North Atlantic North Atlantic oscillation |
op_relation |
doi:10.3389/fmars.2022.978654.s004 https://figshare.com/articles/figure/Image_4_Trends_in_the_abundance_of_Celtic_Sea_demersal_fish_Identifying_the_relative_importance_of_fishing_and_environmental_drivers_jpeg/21090979 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.978654.s004 |
_version_ |
1766382959352348672 |