Assessment of the fishing unit of effort in a coastal artisanal fishery in Manzanillo, Colima, Mexico

Becerril, Alfredo González; Barr, Elaine Espino; Romero, Mirna Cruz; Ruiz‐Luna, Arturo

doi:10.7773/cm.v26i1.568

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Shrimp fishing trips by vessels in the study area average 30 days and must often travel long distances without fishing, which represents a real difficulty to record the number of fishing days. Here we used the number of trips and considered it a good measure of fishing effort in terms of its statistical validity and the simplicity for obtaining it [19][20][21].…”

Section: Bootstrapping and Model Fittingmentioning

confidence: 99%

An Approach to Assessment to Population of the Brown Shrimp, <i>Farfantepenaeus californiensis</i> (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

Meraz-Sánchez¹,

Madrid-Vera²,

Cisneros-Mata³

et al. 2013

OJMS

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The brown shrimp, Farfantepenaeus californiensis, is the most important shrimp species in the Mexican Pacific coastal fisheries, with annual yields averaging 20,000 metric tons. The Mexican state of Sinaloa has the largest Mexican fleet of shrimp trawlers (736 boats) with annual landings of 7000 tons of brown shrimp on average. The status of the brown shrimp fishery was assessed using commercial catch and effort data of the Sinaloa shrimp trawl fleet over 16 years, from 1995 to 2011. We developed a biomass dynamic Schaefer model and used resampling techniques to analyze the catch-per-unit effort (CPUE) of the trawl brown shrimp fishery in the southeastern Gulf of California, Mexico. To ascertain robustness of our conclusions, two hypotheses were tested: observation and process error. Explicitly accounting for observation errors produced the best model fit to available data than including process errors. We identified several sources of observation error, for example discriminating fishing effort by species, changes in catch ability and misreported catch. The brown shrimp fishery showed symptoms of overfishing, although catch reported in the last fishing season considered in the analyses seems to indicate a rapid recovery of the stock. Finally, we predicted for the 2011-12 fishing season a catch of 9630 tonsof brown shrimp.

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Section: Bootstrapping and Model Fittingmentioning

confidence: 99%

An Approach to Assessment to Population of the Brown Shrimp, <i>Farfantepenaeus californiensis</i> (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

Meraz-Sánchez¹,

Madrid-Vera²,

Cisneros-Mata³

et al. 2013

OJMS

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Variabilidad en la abundancia relativa, estructura por tallas y proporción de sexos del dorado Coryphaena hippurus (Pisces: Coryphaenidae) en el Golfo de Tehuantepec, México

Alejo-Plata

Gómez

Serrano-Guzmán

2014

RBT

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For this, fishery catches information was obtained from the artisanal fleet, at six landing sites in the Gulf, and the sex ratio, fork length (FL) and the catch per unit effort (CPUE) were estimated. From all sampling sites, a total of 3 494 females, and 3 877 males were obtained, and dolphinfish size as fork length (FL) ranged from 20.5 to 152cm. Fish size ranged from 25.5 to 148cm furcal length (FL) in males, and 20.5 to 129cm FL in females. The sex ratio (males:females) was 1:1, except in April-May (1:1.5, p<0.05) and November (1:0.5, p<0.05). The sex ratio at different size classes showed a significant bias towards females at smaller sizes (<75cm FL), whereas the males were predominant in larger size classes (>100cm FL). The size structure was bimodal, with a variation in the size average; the modes were defined as the small group (FL=50-55cm) and the large size group (FL=100-110cm). The CPUE showed seasonal changes: values were high for the November-December period, and values were lower for July-August. The seasonal and inter annual variation in the abundance of dolphinfish is probably related to a pre-spawning migration in close relation to the rain-drought regime characteristic of the region, and the associated wind upwelling season of "Tehuanos" in the Gulf of Tehuantepec. Rev. Biol. Trop. 62 (2): 611-626. Epub 2014 June 01.

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Assessment of an artisanal shrimp fishery of Litopenaeus vannamei in a lagoon-estuarine system based on the concept of maximum sustainable yield

Rivera-Velázquez

Soto²,

Salgado-Ugarte³

et al. 2009

Rev. biol. mar. oceanogr.

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Assessment of the fishing unit of effort in a coastal artisanal fishery in Manzanillo, Colima, Mexico

Cited by 3 publications

References 6 publications

An Approach to Assessment to Population of the Brown Shrimp, <i>Farfantepenaeus californiensis</i> (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

An Approach to Assessment to Population of the Brown Shrimp, <i>Farfantepenaeus californiensis</i> (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

Variabilidad en la abundancia relativa, estructura por tallas y proporción de sexos del dorado Coryphaena hippurus (Pisces: Coryphaenidae) en el Golfo de Tehuantepec, México

Assessment of an artisanal shrimp fishery of Litopenaeus vannamei in a lagoon-estuarine system based on the concept of maximum sustainable yield

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Assessment of the fishing unit of effort in a coastal artisanal fishery in Manzanillo, Colima, Mexico

Cited by 3 publications

References 6 publications

An Approach to Assessment to Population of the Brown Shrimp, &lt;i&gt;Farfantepenaeus californiensis&lt;/i&gt; (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

An Approach to Assessment to Population of the Brown Shrimp, &lt;i&gt;Farfantepenaeus californiensis&lt;/i&gt; (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

Variabilidad en la abundancia relativa, estructura por tallas y proporción de sexos del dorado Coryphaena hippurus (Pisces: Coryphaenidae) en el Golfo de Tehuantepec, México

Assessment of an artisanal shrimp fishery of Litopenaeus vannamei in a lagoon-estuarine system based on the concept of maximum sustainable yield

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An Approach to Assessment to Population of the Brown Shrimp, <i>Farfantepenaeus californiensis</i> (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California

An Approach to Assessment to Population of the Brown Shrimp, <i>Farfantepenaeus californiensis</i> (Holmes, 1900), as a Management Fisheries Tool in the Southeastern Gulf of California