1
ABSTRACT.
Penaeus californiensis
Diplectrum conceptioneEtropus ectenes
Key words:
Reducción de la captura incidental en la pesca de arrastre de camarón mediante el uso de un
diseño de red modicado
RESUMEN.
Bycatch reduction in shrimp trawl sheries using a modied net design
8
1
8
Alejandra Travezaño Ambrosio Jaime Mendo
Renato Gozzer-Wuest Jorge Grillo-Núñez
Iván Gomez-Oré Ruggeri Delgado
Jhenifer Fernández Karla Loza-Choque
Marine and
Fishery Sciences
MAFIS
*
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Penaeus californiensis
Diplectrum conceptioneEtropus ectenes
Palabras clave:
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
Pe-
naeus californiensis
Diplectrum
conceptione
Caulerpa liformis
Etropus ectenesLari-
mus pacicus
Description of traditional and modied trawl
nets
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
ECUADOR COLOMBIA
BRAZIL
PIURA
TALARA
SULLANA
CONTRALMIRANTE VILLAR
PAITA
PIURA
MANCORA
LOS ÓRGANOS
EL ALTO
Miles
81° 10 0W'" 81° 50 W'"
4° 10 0 S' "
0 0.5 12
N
Hauls
District
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
P. californiensis
Data collection
P. cal-
iforniensis
D. conceptione E. ectenes
Longitudinal
spacing: 50 cm
2
0
c
m
10 cm
Uniform mesh
size (31.7 mm)
31.7 mm
Codend: 25.4 mm Codend: 25.4 mm
TN MN
A
B
60 mm
60 mm
50 mm
36 mm
22 cm
20 cm
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
±±
±
±
=−
+
Catch per unit area
=
19.00 m 22.6 m
Mat 2a Nms
Pa mult 31.7 200
Pa mult 31.7 320
Pa mult 25.4 150
N
100
135
350
65 65
82
82
65
1
N
2
B
1
N
2
B
1
N
2
B
1
N
2
B
1
N
2
B
1
N
2
B
1
N
2
B
1
N
2
B
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
P. californiensis
D. conceptioneE. ectenes
<
t
P. californiensis
P. californiensis
D. conceptione
E. ectenes
1
N
1
B
1.12 m
(83)
1
N
1
B
Mat mm #
PE 60 48
PE 60 54
PE 60 32
PE 60 45
PE 50 81
40
63
63
33
40
26
9
17
18
36
37
79
(68)
226
166 69
21
(34)
200
20.08 m
24.82 m
T.A15.65 cm.
T.A6.0 cm
T.A9.1 cm
2.78 m
PE 36 63
92
120
7
36
39
104
7
200
20
27
40 40
7
N
2
B
7
N
2
B
NN
3.24 m
3.27 m
2.34 m
6.24 m
2.91 m
2.504 m
5
N
1
B
1T2B
108 (AB)
18(1N4B)
24(1N2B)
16(1N4B)
1N4B
1N4B
1N4B
1N4B
1N4B
1N4B
AB
1T2B
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
8
Catch composition by taxonomic group and
comparison of the catch obtained between TN
and MN
=
<
=
P. californiensis=
Prionotus stephan-
ophrys
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
==
Penaeus californiensis
Penaeus californiensis
p
Penaeus californiensis
==<==<=
Taxonomic group
Brown shrimp
Fish
Macroalgae
Mollusks
Other crustaceans
Others
47%
4%
1%
3%
24%
21%
52%
4%
2%
2%
12%
2%8
AB
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
+
C. liformis
Hippocampus
ingens
C. liformis,
Lepidochelys olivacea
Penaeus californiensis
4,000
3,000
2,000
1,000
0
TN MN
300
200
100
0
750
500
250
0
20,000
10,000
0
TN MN
CPUA (kg km )
-2
AB
CD
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls 11
Catch composition by shers’ use and compar-
ison of the catch obtained between TN and MN
Larimus
pacicus
D. conceptione
Penaeus
californiensis
=
Penaeus californiensis
AB
64%
21%
15%
47%
28%
25%
Fisher’s use of catch
Discards
Others commercial species
Target species
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
<
=D. conceptione=E.
ectenes
E. ectenes
p
Penaeus californiensis
==<=
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
D. conceptioneE. ectenes
Reduction in species number between TN and
MN
<
p
Diplectrum conceptione
Etropus ectenes
=
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
P.
californiensis
Funding
Penaeus californiesis
p
=<=
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
Declaration of competing interest
Ethical statement
Author contributions
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
Hippocampus ingens
==
Travezaño Ambrosio et al.: Bycatch reduction in shrimp trawls
Marine and Fishery Sciences 39 (2): xxx-xxx (2026)
18
=
Penaeus californiensis
=
