Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico

González Gómez, Roberto; Meiners Mandujano, César autor/a; Morillo Velarde, Piedad S. autor/a; Jiménez Badillo, María de Lourdes autor/a 14737; Markaida Aburto, Unai Doctor autor/a 7960

Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico

Mexican management plans currently consider just two octopus species in the official regulations, Octopus maya and Octopus vulgaris. However, the common octopus of the southwestern Gulf of Mexico has been recently identified as Octopus insularis, a species with unique biological and ecological characteristics. In accordance, we sampled O. insularis artisanal catches from the marine protected area of the Veracruz Reef System (VRS) between November 2017 and October 2018 and described its population structure and reproductive dynamics to provide basic biological information for the sustainable management of the species in the region. The 1,007 sampled octopuses ranged from 48 to 2,063 g in body weight (BW) and from 26 to 163 mm mantle length (ML). Most males were mature while the majority of females were immature. Although fishing closures in January, February and August precluded data gathering, most mature and juvenile specimens were registered in March and June respectively, thus, suggesting a year-long life cycle with spawning and recruitment peaks during winter and summer months respectively. Overall, sex ratios did not significantly shift from the expected 1:1, however males were significantly more abundant in December, which could be related to female spawning migrations to deeper waters. This was also supported by the generalized scarcity of mature and spent females in the catches. Males mature at a smaller size (590 g BW; 90 mm ML) than females (870 g BW; 108 mm ML). Although size at maturity is lower than the current minimum legal size for both sexes, most of sampled octopuses were smaller anyway, raising concern about the future sustainability of the fishery.

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Main Authors:	González Gómez, Roberto, Meiners Mandujano, César autor/a, Morillo Velarde, Piedad S. autor/a, Jiménez Badillo, María de Lourdes autor/a 14737, Markaida Aburto, Unai Doctor autor/a 7960
Format:	Texto biblioteca
Language:	eng
Subjects:	Octopus insularis, Pulpos, Pesca artesanal, Composición de la población, Dinámica de la población,
Online Access:	https://www.sciencedirect.com/science/article/pii/S0165783619302401?via%3Dihub
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id	KOHA-OAI-ECOSUR:59656
record_format	koha
spelling	KOHA-OAI-ECOSUR:596562024-03-12T12:53:10ZReproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico González Gómez, Roberto Meiners Mandujano, César autor/a Morillo Velarde, Piedad S. autor/a Jiménez Badillo, María de Lourdes autor/a 14737 Markaida Aburto, Unai Doctor autor/a 7960 textengMexican management plans currently consider just two octopus species in the official regulations, Octopus maya and Octopus vulgaris. However, the common octopus of the southwestern Gulf of Mexico has been recently identified as Octopus insularis, a species with unique biological and ecological characteristics. In accordance, we sampled O. insularis artisanal catches from the marine protected area of the Veracruz Reef System (VRS) between November 2017 and October 2018 and described its population structure and reproductive dynamics to provide basic biological information for the sustainable management of the species in the region. The 1,007 sampled octopuses ranged from 48 to 2,063 g in body weight (BW) and from 26 to 163 mm mantle length (ML). Most males were mature while the majority of females were immature. Although fishing closures in January, February and August precluded data gathering, most mature and juvenile specimens were registered in March and June respectively, thus, suggesting a year-long life cycle with spawning and recruitment peaks during winter and summer months respectively. Overall, sex ratios did not significantly shift from the expected 1:1, however males were significantly more abundant in December, which could be related to female spawning migrations to deeper waters. This was also supported by the generalized scarcity of mature and spent females in the catches. Males mature at a smaller size (590 g BW; 90 mm ML) than females (870 g BW; 108 mm ML). Although size at maturity is lower than the current minimum legal size for both sexes, most of sampled octopuses were smaller anyway, raising concern about the future sustainability of the fishery.Mexican management plans currently consider just two octopus species in the official regulations, Octopus maya and Octopus vulgaris. However, the common octopus of the southwestern Gulf of Mexico has been recently identified as Octopus insularis, a species with unique biological and ecological characteristics. In accordance, we sampled O. insularis artisanal catches from the marine protected area of the Veracruz Reef System (VRS) between November 2017 and October 2018 and described its population structure and reproductive dynamics to provide basic biological information for the sustainable management of the species in the region. The 1,007 sampled octopuses ranged from 48 to 2,063 g in body weight (BW) and from 26 to 163 mm mantle length (ML). Most males were mature while the majority of females were immature. Although fishing closures in January, February and August precluded data gathering, most mature and juvenile specimens were registered in March and June respectively, thus, suggesting a year-long life cycle with spawning and recruitment peaks during winter and summer months respectively. Overall, sex ratios did not significantly shift from the expected 1:1, however males were significantly more abundant in December, which could be related to female spawning migrations to deeper waters. This was also supported by the generalized scarcity of mature and spent females in the catches. Males mature at a smaller size (590 g BW; 90 mm ML) than females (870 g BW; 108 mm ML). Although size at maturity is lower than the current minimum legal size for both sexes, most of sampled octopuses were smaller anyway, raising concern about the future sustainability of the fishery.Adobe Acrobat profesional 6.0 o superiorOctopus insularisPulposPesca artesanalComposición de la poblaciónDinámica de la poblaciónDisponible en líneaFisheries Researchhttps://www.sciencedirect.com/science/article/pii/S0165783619302401?via%3DihubDisponible para usuarios de ECOSUR con su clave de acceso
institution	ECOSUR
collection	Koha
country	México
countrycode	MX
component	Bibliográfico
access	En linea En linea
databasecode	cat-ecosur
tag	biblioteca
region	America del Norte
libraryname	Sistema de Información Bibliotecario de ECOSUR (SIBE)
language	eng
topic	Octopus insularis Pulpos Pesca artesanal Composición de la población Dinámica de la población Octopus insularis Pulpos Pesca artesanal Composición de la población Dinámica de la población
spellingShingle	Octopus insularis Pulpos Pesca artesanal Composición de la población Dinámica de la población Octopus insularis Pulpos Pesca artesanal Composición de la población Dinámica de la población González Gómez, Roberto Meiners Mandujano, César autor/a Morillo Velarde, Piedad S. autor/a Jiménez Badillo, María de Lourdes autor/a 14737 Markaida Aburto, Unai Doctor autor/a 7960 Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico
description	Mexican management plans currently consider just two octopus species in the official regulations, Octopus maya and Octopus vulgaris. However, the common octopus of the southwestern Gulf of Mexico has been recently identified as Octopus insularis, a species with unique biological and ecological characteristics. In accordance, we sampled O. insularis artisanal catches from the marine protected area of the Veracruz Reef System (VRS) between November 2017 and October 2018 and described its population structure and reproductive dynamics to provide basic biological information for the sustainable management of the species in the region. The 1,007 sampled octopuses ranged from 48 to 2,063 g in body weight (BW) and from 26 to 163 mm mantle length (ML). Most males were mature while the majority of females were immature. Although fishing closures in January, February and August precluded data gathering, most mature and juvenile specimens were registered in March and June respectively, thus, suggesting a year-long life cycle with spawning and recruitment peaks during winter and summer months respectively. Overall, sex ratios did not significantly shift from the expected 1:1, however males were significantly more abundant in December, which could be related to female spawning migrations to deeper waters. This was also supported by the generalized scarcity of mature and spent females in the catches. Males mature at a smaller size (590 g BW; 90 mm ML) than females (870 g BW; 108 mm ML). Although size at maturity is lower than the current minimum legal size for both sexes, most of sampled octopuses were smaller anyway, raising concern about the future sustainability of the fishery.
format	Texto
topic_facet	Octopus insularis Pulpos Pesca artesanal Composición de la población Dinámica de la población
author	González Gómez, Roberto Meiners Mandujano, César autor/a Morillo Velarde, Piedad S. autor/a Jiménez Badillo, María de Lourdes autor/a 14737 Markaida Aburto, Unai Doctor autor/a 7960
author_facet	González Gómez, Roberto Meiners Mandujano, César autor/a Morillo Velarde, Piedad S. autor/a Jiménez Badillo, María de Lourdes autor/a 14737 Markaida Aburto, Unai Doctor autor/a 7960
author_sort	González Gómez, Roberto
title	Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico
title_short	Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico
title_full	Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico
title_fullStr	Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico
title_full_unstemmed	Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico
title_sort	reproductive dynamics and population structure of octopus insularis from the veracruz reef system marine protected area, mexico
url	https://www.sciencedirect.com/science/article/pii/S0165783619302401?via%3Dihub
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Reproductive dynamics and population structure of octopus insularis from the Veracruz reef system marine protected area, Mexico

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