Time filter

Source Type

Progreso, Mexico

Wakida-Kusunoki A.T.,Instituto Nacional Of Pesca
Revista de Biologia Marina y Oceanografia | Year: 2015

This paper describes the first record of total albinism in the southern stingray Dasyatis americana. The disc width of the albino sub adult female specimen was 640 mm and the total weight was 9,850 g. It was captured in the coast of Tabasco, southeastern Mexico. © 2015, Universidad de Valparaiso. All rights reserved. Source

Wakida-Kusunoki A.T.,Instituto Nacional Of Pesca | Amador-del-Angel L.E.,Autonomous University of Carmen
Aquatic Invasions | Year: 2011

Cyprinus carpio is known to be established in most of Mexico. Only the Mexican Gulf states were free of this species until recently. This paper reports the first record of the common carp in Tabasco, Mexico. Seven specimens of Cyprinus carpio var. communis and one specimen of Cyprinus carpio var. specularis were detected in a small scale fishing landing site near Frontera, Tabasco on January 24, 2011. Further sampling and monitoring is required to assess the ecological impacts of this exotic species on the native fauna. © 2011 The Author(s). Source

Shell length frequency distribution (SLFD) and sex ratio of a subpopulation of the mangrove cockles Anadara tuberculosa and Anadara similis were analyzed from natural beds in the Cayapas-Mataje Ecological Mangrove Reserve, Ecuador. The SLFD was different between sexes for both species; females were larger than males. Subpopulations of A. tuberculosa and A. similis were dominated by females throughout the year. The overall sex ratio was 2.6:1 (female: male), although with variations in the monthly samples, from 1.2:1 to 5.9:1 in A. tuberculosa and 1.9:1 to 5.3:1 in A. similis. Possibly, these results may be due to differential growth rate between sexes and environmental factors along the year. Source

Schaefer K.M.,Inter American Tropical Tuna Commission | Fuller D.W.,Inter American Tropical Tuna Commission | Aldana G.,Instituto Nacional Of Pesca
Fisheries Oceanography | Year: 2014

The movements, behavior, and habitat utilization of yellowfin tuna, Thunnus albacares, following capture and release with archival tags in the Revillagigedo Islands Archipelago Biosphere Reserve (RIABR), Mexico, are described from analyses of 16 578 days of time-series data, downloaded from 52 archival tags recovered from yellowfin (78-173 cm in length and 1.7-8.0 yr of age) at liberty from 93 to 1773 days (x- = 411 days), collected during 2006-2012. An unscented Kalman filter model with sea-surface temperature measurements integrated (UKFsst) was used to process the archival tag data sets to obtain improved estimates of geographic positions, most probable tracks (MPTs), and movement parameters. The MPTs indicate restricted movements, low levels of dispersion, and fidelity of yellowfin tuna to the RIABR. The median parameter estimates from the UKFsst model for errors in longitude (σx) and latitude (σy) were 0.46° and 1.84°, respectively, for directed movements (u and v) -0.05 NM day-1 and -0.05 NM day-1, respectively, and for dispersive movement (D) 117.99 NM2 day-1. Analyses of daily timed depth and temperature records resulted in the classification of the data into four distinct behaviors. There are significant differences among ages in the durations of Type I and Type II diving behaviors and in the daytime and nighttime vertical habitat utilization distributions. The oceanography surrounding the RIABR appears to have a profound influence on the movements, behavior, and habitat utilization of yellowfin in this area. © 2013 John Wiley & Sons Ltd. Source

Cisneros-Montemayor A.M.,University of British Columbia | Cisneros-Mata M.A.,Instituto Nacional Of Pesca | Harper S.,University of British Columbia | Pauly D.,University of British Columbia
Marine Policy | Year: 2013

It is well recognized that not all fisheries catches are reported or recorded properly by either government or non-government agencies. These unreported catches can be illegal, of unregulated species, or simply not monitored due to logistical barriers. In Mexico, these barriers are an extensive and often not easily accessible coastline, mostly de facto open access fisheries, poor administrative practices and generalized corruption in the fishing sector as a whole. These conditions were likely promoted early in the last century through the government's largely successful policies to increase fisheries catches and stimulate employment and economic growth. Many years later and amid declines in fish stocks and subsequent economic benefits, most notably at local scales, it is evidently time for a fundamental change in strategy away from expansion of fishing effort and toward ecological and economic sustainability. An important step in this endeavor is to provide a quantitative pre- mortem analysis of Mexico's total marine fisheries catches during the last half-century. Results suggest that from 1950 to 2010, total catches were nearly twice as high as the official reports, with an average annual catch of 1.5 million tonnes (t) compared to 796. thousand. t in official statistics. In the last year of available data, 2010, official and total estimated catches were 1.5. million and 2.2. million. t, respectively. While these results may be perceived as a criticism of the status quo and ante, this study actually does not single out a responsible party, but is, rather, a call to the many sectors of society who contribute to a lack of control, to help overcome these conditions, and increase and sustain the benefits from Mexico's marine fisheries. © 2012 Elsevier Ltd. Source

Discover hidden collaborations