A Trophic Model for a Periodically Closed Coastal Lagoon System in the Southern Mexican Pacific

Graceful mojarra (Eucinostomus gracilis) is an important component of the ichthyic fauna of lagoon systems but knowledge of its population aspects is scarce. Monthly samples in the Magdalena-Almejas Lagoon system (March-August, 2014-2017) were obtained with a trawling net. Abundance was estimated using the swept area method and its spatial variation; and the maturity size was determined using the logistic method. The sex ratio for mature and immature populations, and their length-weight relationship were estimated; FISAT was used to estimate the growth and recruitment parameters. Abundance ranged from 0.6 to 203 ind-Ha-1 with changes for each lagoon system areas and among years. Size at maturity (L50) was 132 mm in total length (TL) for the population, 129 mm TL females, and 135 mm TL males. Considering the population of the total organisms, L50 indicated that 18% were adults and 82% were juveniles. Juvenile dominance indicated that this lagoon system is used for grow-out. The smaller ratio of adult organisms does not allow asserting assertion that the priority of the area is for reproduction. E. gracilis showed moderate growth (K = 0.56 year-1) with longevity of 5.4 years and asymptotic length of L∞ = 195 mm.

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Anthropogenic regulation of the phosphorus balance in the Thau catchment–coastal lagoon system (Mediterraean Sea, France) over 24 years

Marine Pollution Bulletin ◽

10.1016/j.marpolbul.2003.10.011 ◽

2004 ◽

Vol 48 (7-8) ◽

pp. 679-687 ◽

Cited By ~ 21

Author(s):

I. La Jeunesse ◽

M. Elliott

Keyword(s):

Coastal Lagoon ◽

Phosphorus Balance ◽

Lagoon System

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Laeonereis watsoni (Annelida, Nereididae), a new species from western Mexico

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315417000583 ◽

2017 ◽

Vol 98 (6) ◽

pp. 1347-1353 ◽

Cited By ~ 1

Author(s):

J. A. de León-González ◽

N. Méndez ◽

J. G. Navedo

Keyword(s):

New Species ◽

Coastal Lagoon ◽

Anterior Margin ◽

Pacific Coast ◽

Coastal Lagoons ◽

Relative Size ◽

Mexican Pacific ◽

Shrimp Farm ◽

Western Mexico ◽

A New Species

A new species of Laeonereis from a shrimp farm associated with a subtropical coastal lagoon on the Mexican Pacific coast is described. The new species is characterized by a deep anterior groove on the prostomium, which is shared only with L. culveri. However, longer tentacular cirri extending back to the anterior margin of chaetiger two, the number of papillae of each group on the maxillary ring of the pharynx, and the relative size of the homogomph falcigers in the new species, allow us to separate the two species. Although the species has not been previously detected in the coastal lagoon surrounding the shrimp farm, we postulate that L. watsoni n. sp. is likely to be part of the invertebrate communities of the upper parts of similar coastal lagoons that are common along the tropical coasts of Mexico.

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