1
D. eleginoides
Key words:
Hacia una pesquería más selectiva de merluza negra
RESUMEN. Dissostichus ele-
ginoides
stock
D. eleginoides
Marine Insights
Towards a
more selective
Patagonian
toothsh shery
How measures implemented in Argentina
reduced the proportion of juveniles in catches.
By Otto C. Wöhler, Patricia A. Martínez, Gonzalo H. Troccoli,
Germán Lukaszewicz and Emiliano J. Di Marco
ABSTRACT. Dissostichus eleginoides
Marine and
Fishery Sciences
MAFIS
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Palabras clave:
INTRODUCTION
Dissostichus elegi-
noides
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Selectivity in the Argentine Patagonian toothsh
shery
Macruronus magellanicus
Micromesistius australis
“In response to the alarming state
of the stock, the national sheries
administration issued numerous
administrative measures to create
a regulatory framework to address
and resolve the problem”
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Establishing a minimum permissible depth for
target shing
Additional measures aimed at eectively limit-
ing the capture of juvenile Patagonian toothsh
Limiting the proportion of incidental catch. Deni-
tion of a shing trip targeting the species
M. magellanicus
M. australis
“Regulating eet access to specic
fractions of the population by
establishing a minimum depth
limit for targeted shing has
proven to be an easy-to-monitor
management strategy that was
well accepted by the eet because
it did not require additional costs
or shing gear modications”
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Establishing the Juvenile Patagonian Toothsh
Protection Area (APJMN)
Establishing a maximum allowed percentage of
juvenile specimens in catches
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Control of landings
Estimating conversion factors for trunks and
llets to monitor landings
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Determining regulatory hook type for Patagon-
ian toothsh shing
Impact of the new management and control
scheme
“As an advisory body, CASPMeN’s
primary role is to provide
recommendations for the
development of the shery and
propose new regulations or
modications to existing ones,
with the goal of improving
management eciency”
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Proportion of juveniles in Patagonian toothsh
catches in other sheries
<
>
<
>
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Frecuency
AB
0
1
2
3
4
5
6
7
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2000
2003
2004
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2000
2003
2004
0
1
2
3
4
5
6
7
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2005
2006
2007
0
1
2
3
4
22 32 42 52 62 72 82 92 102112
122132142152162172182192202216246
2005
2006
2007
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2008
2009
2010
0
1
2
3
4
5
6
7
8
22 32 42 52 62 72 82 92 102112
122132142152162172182192202216246
2008
2009
2010
0
1
2
3
4
5
6
7
8
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2011
2012
2013
0
1
2
3
4
22 32 42 52 62 72 82 92 102112
122132142152162172182192202216246
2011
2012
2013
TL (cm) TL (cm)
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2014
2015
2016
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2014
2015
2016
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2017
2018
2019
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2017
2018
2019
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
2020
2021
2022
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
TL (cm)
0
1
2
3
4
22 32 42 52 62 72 82 92 102112122132142152162172182192202216246
TL (cm)
2023
2024
AB
Frecuency
2020
2021
Wöhler et al.: Towards a more selective Patagonian toothfish fishery 11
+
'
''
0
2
4
6
8
10
12
14
52 62 72 82 92 102 112 122 132 142 152 162 172 182 192 202
Frecuency
TL (cm)
2009
2020
2022
0
5
10
15
20
25
52 62 72 82 92 102 112 122 132 142 152 162 172 182 192
TL (cm)
Zone 1
Zone 2
Zone 3
Zone 4
AB
2019
0
1
2
3
4
5
6
7
8
2122232425262728292 102 112 122
Frecuency
TL (cm)
2012
2017
2022
0
2
4
6
8
10
12
14
16
18
2132333435363738393 103113123133143153163173183193203210
TL (cm)
2012
2017
2022
AB
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
“There is no specic conservation
measure in place to reduce
the prevalence of juveniles in
Patagonian toothsh sheries
controlled by the Commission
for the Conservation of Antarctic
Marine Living Resources (CCAMLR)”
150
125
100
75
50000000000
44 4444444
88 8888888
2013 2014 2015 2016 2017 2018 2019 2020 2021
Frequency (%)
Length (cm)
2022
048
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
100
75
50
250480 00000000
444444444
888888888
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Frequency (%)
Length (cm)
100
75
50
250480 00000000
444444444
888888888
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Frequency (%)
Length (cm)
125
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
150
125
100
75
50
250480 00000000
444444
444
888888888
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Frequency (%)
Length (cm)
100
75
50
250480 00000000
444444444
888888888
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Frequency (%)
Length (cm)
125
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Merluccius hubbsi
CONCLUSIONS
“In contrast, in the case of the
Argentine Patagonian toothsh
shery, we believe that the
success in rapidly reducing
juvenile catch was mainly due to
an innovative real-time dynamic
shery management approach,
implemented in the early 2000s,
in which administrators, industry
stakeholders, and scientists
worked collaboratively”
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
“Accordingly, the impact of
shing on the juvenile fraction
of Patagonian toothsh in the
Southwest Atlantic is a key
concern for the sustainability
of this high-value shery”
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Author contributions.
REFERENCES
Dis-
sostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus elegi-
noides
Dissostichus
Dis-
sostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dis-
sostichus eleginoides
Dis-
sostichus eleginoides
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Gadus morhua
Melanogrammus aeglenus
Dissostichus eleginoides
Dissostichus
eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Merluccius hubbsi
Dissostichus eleginoides
Merluccius hubbsi
Theragra chalcogramma
Wöhler et al.: Towards a more selective Patagonian toothfish fishery
Dissostichus eleginoides
Dissostichus ele-
ginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Dissostichus eleginoides
Merluccius hubbsi
Dis-
sostichus eleginoides
Dissostichus elegi-
noides
Dissostichus eleginoides
Dissostichus
eleginoides
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Dissostichus eleginoi-
des
Dissostichus eleginoides
*
Gonzalo H. Troccoli
