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Índices de diversidad máxima (Hmáx). diversidad (H'n), equitatividad (J) y riqueza de especies (D) para la comunidad malacológica total.
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RESUMEN Se expone la complejidad estructural de la comunidad de moluscos bénticos presentes en la Laguna Tampamachoco, con base en abundancia, frecuencia y densidad de 66 especies de las Clases Gastropoda y Bivalvia. El 64% de éstas fueron de origen marino-salobre. Entre los gasterópodos abundaron los organismos epifaunales, colectores de depósitos...
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Citations
... Las especies de importancia pesquera son Albula vulpes Linnaeus, 1758, Arius felis Linnaeus, 1766, Caranx hippos Linnaeus, 1776, Mugil curema Valenciennes, 1836 y Centropomus parallelus Poey, 1860 (Basáñez-Muñoz, 2006). La fauna bentónica está representada por moluscos, con 66 especies registradas, representadas en 37 especies de gasterópodos y 29 de bivalvos (Reguero y García-Cubas, 1992), los gasterópodos más comunes sonBasáñez-Muñoz, 2006). En aves se tiene un registro de 154 especies (García, 2011), cifra que representa el 22% de las especies reportadas para Veracruz (Montejo-Díaz y McAndrews, 2006), el 69% son especies residentes del sitio RAMSAR 1602, siendo las más abundantes Eudocimus albus Linnaeus, 178 y Quiscalus mexicanus Gmelin, 1788 (García, 2011). ...
Coastal development is a major anthropogenic factors that modify and degrade the coastal
lagoons and mangrove swamps of Mexico, for this reason, the aim of this work is to highlight
the importance of representing the red mangrove (Rhizophora mangle) at the biological and
ecological coastal ecosystems and conceptualize it as an umbrella species for the lake
Tampamachoco to generate initiatives to protect and restore the lagoon system as signs of
deterioration and contamination. Proposes strategies and actions for restoration and protection
of the lagoon Tampamachoco to safeguard the flora and fauna that protects the red mangrove,
improved hydrological conditions of the lagoon and retrieve important species and commercial
fisheries which are certain to reactivate economic income fisheries and restaurant.
... In Laguna de Terminos, their distribution is restricted and localized on the shoals of Punta Gorda (Garcia-Cubas, 1981). Quahogs are not found in Lagunas Pueblo Viejo, Camaronera, or de Alvarado (Reguero and Garcia-Cubas, 1989, 1993. The southeasternmost location in Mexico where southern quahogs have been harvested is by Isla Arena near the town of Celestun, Campeche, close to the Yucatan border. ...
The northern quahog, Mercenaria mercenaria, ranges along the Atlantic Coast of North America from the Canadian Maritimes to Florida, while the southern quahog, M. campechiensis, ranges mostly from Florida to southern Mexico. The northern quahog was fished by native North Americans during prehistoric periods. They used the meats as food and the shells as scrapers and as utensils. The European colonists copied the Indians treading method, and they also used short rakes for harvesting quahogs. The Indians of southern New England and Long Island, N.Y., made wampum from quahog shells, used it for ornaments and sold it to the colonists, who, in turn, traded it to other Indians for furs. During the late 1600’s, 1700’s, and 1800’s, wampum was made in small factories for eventual trading with Indians farther west for furs. The quahoging industry has provided people in many coastal communities with a means of earning a livelihood and has given consumers a tasty, wholesome food whether eaten raw, steamed, cooked in chowders, or as stuffed quahogs. More than a dozen methods and types of gear have been used in the last two centuries for harvesting quahogs. They include treading and using various types of rakes and dredges, both of which have undergone continuous improvements in design. Modern dredges are equipped with hydraulic jets and one type has an escalator to bring the quahogs continuously to the boats. In the early 1900’s, most provinces and states established regulations to conserve and maximize yields of their quahog stocks. They include a minimum size, now almost universally a 38-mm shell width, and can include gear limitations and daily quotas. The United States produces far more quahogs than either Canada or Mexico. The leading producer in Canada is Prince Edward Island. In the United States, New York, New Jersey, and Rhode Island lead in quahog production in the north, while Virginia and North Carolina lead in the south. Connecticut and Florida were large producers in the 1990’s. The State of Tabasco leads in Mexican production. In the northeastern United States, the bays with large openings, and thus large exchanges of bay waters with ocean waters, have much larger stocks of quahogs and fisheries than bays with small openings and water exchanges. Quahog stocks in certified beds have been enhanced by transplanting stocks to them from stocks in uncertified waters and by planting seed grown in hatcheries, which grew in number from Massachusetts to Florida in the 1980’s and 1990’s.
The first list of groups of benthic invertebrates Mandinga lagoon complex (MLC) is presented. Seven collections were carried out in dry seasons from 2008 to 2015 and one in rainy in 2015. The endo-benthic organisms were collected with a dredge and the epi-benthic organisms, with a renfro and seine net. All organisms were identified to the permissible level. The list consists of a total of 43 groups, distributed in eight phylums, seven classes, nine orders, 16 families and three types of larvae. The groups Decapoda (10), Gastropoda (8), Amphipoda (4), Bivalvia (3), Tanaidacea (3) and Isopoda (3), were the most diverse, followed to by the groups that were determined at higher levels a Family (12). The diversity of groups is similar to that of other coastal systems in Veracruz, where the orders Decapoda, Amphipoda and Tanaidacea were the most diverse, followed by Isopoda. The results of the present investigation represent an important contribution for the knowledge of the diversity of the system studied and the distribution of the groups in Veracruz and the Gulf of Mexico.
The American oyster, Crassostrea virginica, is one of the most important economic
coastal fishery activities in Mexico. As for other bivalve molluscs, its sustainability is based on healthy
populations, and additional information on current reproductive cycles, will reinforce local management strategies.
The objective of this study was to evaluate the effect of temperature and salinity on the gonadal development
stages in both sexes and in two size groups (40-60 mm and ≥ 61 mm) of C. virginica from Tamiahua
Lagoon, Gulf of Mexico. Monthly surveys of 90 organisms were undertaken, for a yearly total of 1 080 oysters
sampled from the lagoon in 2011. Both field and laboratory work used standard procedures. Our results showed
that reproduction was continuous in both sexes, but some peaks of the reproductive cycle were observed along
the year. Peaks registered from January to July were for gametogenesis; those of June and September were for
mature individuals; and in January, February, and from September to December, for spawning/spent oysters.
Maturity of females of both range sizes was positively correlated with temperature, but not for males. For spawning,
spent individuals, males of sizes ≥ 61 mm were positively correlated with salinity, whereas smaller males
(40-60 mm) and females of both sizes, did not show any correlation. In this study, we observed that temperature
and salinity had a different effect in the reproduction of the American oyster of different sizes and sexes of
Tamiahua lagoon.
