Composicion de la ictiofauna capturada en la pesqueria artesanal de la Isla Isabel (sureste del Golfo de California), Mexico

Torrescano-Castro, Carlos G; Lara‐Mendoza, Raúl E.; Torres-Covarrubias, Luis A; Cortés-Hernández, Mauricio

doi:10.3856/vol44-issue4-fulltext-14

Cited by 3 publications

(5 citation statements)

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“…In this study, 2 to 4" mesh sizes were used. Furthermore, unlike the study area reported by Torrescano-Castro et al (2016), which is 35 km away from the nearest coast, the other two studies were conducted in the estuary and adjacent coastal areas, which have a high fishing pressure in both Nayarit and Guatemala (Ramírez-Zavala and Bojórquez-Sauceda, 2006;Ortiz et al 2021). Another factor to consider in the size difference could be the fact that, according to information from the NOAA Weather Forecast Center (NOAA, 2022), the study was conducted in a representative year, whereas that of Ortiz et al (2021) was conducted in the midst of La Niña.…”

Section: Discussionmentioning

confidence: 91%

“…artisanal fishery of Isla Isabel, Nayarit, Mexico (Torrescano-Castro et al, 2016), larger individuals of C. reticulatus were found (Ẋ = 40.8 cm and = 619.4 g). The difference between the sizes stated in the aforementioned work and the other two can be attributed to the different fishing gear used, since this work reports the use of gill nets with mesh sizes of 8.9, 10.2 and 12.7 cm (3.5, 4 and 5") (for 96.4 % of the total catch), while Ortiz et al (2021) report the use of gill nets with mesh sizes of 5.1 and 7.6 cm (2 and 3").…”

Section: Discussionmentioning

confidence: 93%

“…En un estudio realizado en 2016 sobre Table 4. Adjustment parameters of the sigmoidal modeland intervals of the striped weakfish's sexual maturity size la composición de la ictiofauna capturada en la pesquería artesanal de Isla Isabel, Nayarit, México (Torrescano-Castro et al, 2016), se encontraron tallas más grandes de ejemplares de C. reticulatus, (Ẋ = 40,8 cm y = 619,4 g) de peso. La diferencia en las tallas presentadas en el último trabajo mencionado con respecto a las dos anteriores, se puede atribuir a las diferentes artes de pesca utilizadas, ya que este trabajo registra el uso de redes de enmalle de 8,9; 10,2 y 12,7 cm (3,5, 4 y 5") de luz de malla (para 96,4 % de la captura total), mientras que Ortiz et al (2021) registran el uso de redes de enmalle de 6,4 y 7,6 cm (2,5 y 3") y para el presente estudio se emplearon de 5,1 a 10,2 cm (2 a 4") de luz de malla.…”

Section: Discussionunclassified

“…La diferencia en las tallas presentadas en el último trabajo mencionado con respecto a las dos anteriores, se puede atribuir a las diferentes artes de pesca utilizadas, ya que este trabajo registra el uso de redes de enmalle de 8,9; 10,2 y 12,7 cm (3,5, 4 y 5") de luz de malla (para 96,4 % de la captura total), mientras que Ortiz et al (2021) registran el uso de redes de enmalle de 6,4 y 7,6 cm (2,5 y 3") y para el presente estudio se emplearon de 5,1 a 10,2 cm (2 a 4") de luz de malla. Además, a diferencia de la zona de estudio registrada por Torrescano-Castro et al (2016), la cual está a 35 km de distancia de la costa más cercana, los otros dos estudios se realizaron en la zona estuarina y costera adyacente, la cual tiene una alta presión pesquera tanto en Nayarit como en Guatemala (Ramírez-Zavala y Bojórquez-Sauceda, 2006;Ortiz et al 2021). Otro factor que puede considerarse para la diferencia en la talla encontrada podría ser el hecho que de acuerdo con información del Centro de Predicción del Clima de la NOAA (NOAA, 2022), el estudio se realizó en un año tipo, mientras que el realizado por Ortiz et al (2021) fue realizado en medio del fenómeno de La Niña, y el estudio aquí presentado fue durante parte del fenómeno de El Niño.…”

Section: Discussionunclassified

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Biología reproductiva de la corvina rayada Cynoscion reticulatus en una localidad del sureste del Golfo de California

Carrillo Isiordia,

Zavala Leal,

Flores Ortega

et al. 2023

Bol. Investig. Mar. Costeras

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En el estado de Nayarit, al sureste del Golfo de California, la pesca representa un porcentaje considerable en cuanto a fuente de ingresos para la población. La pesquería de corvinas es de gran importancia, sin embargo, no existe información biológica-pesquera sobre estas en la región. Debido a su importancia, se describió la biología reproductiva de la corvina rayada Cynoscion reticulatus durante el año 2019. Se recolectaron muestras mensuales, con un total de 390 organismos. Se estimaron índices morfofisiológicos y se realizó un análisis histológico de las gónadas. Del total de los organismos se encontró que 246 fueron hembras y 144 machos. Se observó una proporción sexual mayor en hembras (1:0.5) H: M. Se describió el ciclo gonádico y el ciclo reproductivo. De acuerdo a los índices y análisis histológico, se determinó que la corvina presenta un amplio periodo reproductivo entre la primavera y el verano (abril a agosto). La temperatura y fotoperiodo presentaron una correlación positiva con la reproducción. En cuanto a la talla de primera madurez, se encontraron tallas muy similares para ambos sexos, para las hembras de 24.5 cm y de 23.6 cm de longitud patrón para los machos.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 93%

Section: Discussionunclassified

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Biología reproductiva de la corvina rayada Cynoscion reticulatus en una localidad del sureste del Golfo de California

Carrillo Isiordia,

Zavala Leal,

Flores Ortega

et al. 2023

Bol. Investig. Mar. Costeras

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“…snyderi ) were observed in high abundance in Guatemala and may rank equal to or higher than elasmobranch catches in their importance to the livelihoods of small‐scale fishers and market vendors and as inexpensive sources of essential food to local households. Finally, many of the bony fish species recorded also form important components of the SSF landings described for the Pacific coast of Mexico (Madrid, Sanchez & Ruiz, 1997; Rojo‐Vazquez et al, 2008; Torrescano‐Castro et al, 2016). Given the similar coastal ecology and geographic extent of these species, they may constitute shared stocks and an opportunity to harmonize regulations and management approaches.…”

Section: Discussionmentioning

confidence: 99%

Simple length‐based approaches offer guidance for conservation and sustainability actions in two Central American small‐scale fisheries

Tewfik

Babcock

Phillips

et al. 2022

Aquatic Conservation

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1. Many species targeted by multi-gear small-scale fisheries in developing countries are poorly studied in terms of fisheries sustainability even as their contributions to biodiversity, livelihoods, export earnings and food security are well documented.2. This study presents new information on more than 150 fish species that constitute the bulk of small-scale fishery landings in Belize and on the Pacific coast of Guatemala to provide guidance for improved biodiversity conservation and fisheries management. This includes a number of species listed as threatened on the IUCN Red List and Appendix II of CITES.3. Simple, length-based approaches and thresholds of size at maturity show that many of the elasmobranch and bony fish species examined have many immature individuals landed (Belize 51%, Guatemala 77%) across several gears. 4. In both countries, maximum size is negatively correlated with the intensity of overfishing for several common metrics: proportions of mature, optimal sized and mega-spawners. The disproportionate removal of the largest species first will have cascading effects on biodiversity, community structure and species interactions, as well as livelihood opportunities and food security for fishing communities. Status indicators, such as fishing mortality rate relative to natural mortality rateand estimates of depletion based on lengths are sensitive to the assumed values of life history parameters, indicating the importance of improved data on growth, maturity and mortality for these populations.6. Our study emphasizes the use of a combination of fisheries conservation strategies, including size and effort controls, in conjunction with the closed area concept (i.e. marine protected areas) and meaningful consultation with resource users in order to maximize benefits for nature and people.Alexander Tewfik and Elizabeth A. Babcock contributed equally to this research.

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An Assessment of Seasonal Differences in Fish Populations in Laizhou Bay Using Environmental DNA and Conventional Resource Survey Techniques

Dai

Bai

Jia

et al. 2022

Fishes

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In recent years, environmental DNA (eDNA) technology has gradually improved, and it has been increasingly used to monitor marine fish. The decline and seasonal fluctuations of fish resources in Laizhou Bay, Bohai were studied using eDNA technology and compared with the results of conventional fish resource survey methods. In November 2020 (autumn), March 2021 (spring), and July 2021 (summer), 12 samples were collected each quarter in Laizhou Bay and adjacent waters for a total of 36 eDNA samples, and 47 fish species were identified. During the same trip, ground cages, gillnets, and trawls were used during two seasons. Fishery resource surveys were conducted at 12 sites from November 2020 (autumn) to March 2021 (spring), and in total 11 fish species were found. Our study found that fishery resources in Laizhou Bay significantly fluctuated with seasonal changes. Additionally, compared with traditional surveys, eDNA information included the same results, but also included fish that could not be collected because of the technical limitations of traditional surveys. Therefore, this study provides more accurate seasonal information for fish in Laizhou Bay, which is of great significance for the long-term management and conservation of coastal biodiversity.

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Composicion de la ictiofauna capturada en la pesqueria artesanal de la Isla Isabel (sureste del Golfo de California), Mexico

Cited by 3 publications

References 5 publications

Biología reproductiva de la corvina rayada Cynoscion reticulatus en una localidad del sureste del Golfo de California

Biología reproductiva de la corvina rayada Cynoscion reticulatus en una localidad del sureste del Golfo de California

Simple length‐based approaches offer guidance for conservation and sustainability actions in two Central American small‐scale fisheries

An Assessment of Seasonal Differences in Fish Populations in Laizhou Bay Using Environmental DNA and Conventional Resource Survey Techniques

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