ON A SMALL COLLECTION OF CARIDEAN SHRIMPS (CRUSTACEA: DECAPODA) FROM THE BARRA DE NAVIDAD COASTAL LAGOON, JALISCO, MEXICO

Trabajo recibido el 26 de febrero de 1986 y aceptado para su publicación el 26 de enero de 1987.

RESUMEN

INTRODUCCIÓN

Caridean shrimps have been scarcely collected along the Mexican Pacific coast, south of the Gulf of California area (Holthuis, 1951, 1952; Wicksten, 1983). Although the caridean fauna of the Eastern Pacific Tropical Region is relatively well-known, many species have so far been reported for only a few localities.

During the years 1983-84, collection of several caridean species was made in a small coastal lagoon located near the Mexican city of Barra de Navidad, Jalisco (19° 11'N - 104° 39'W) and the material obtained from this small-scale survey is reported herein.

All specimens were collected by hand, sometimes with the use of a shovel, and with a Van Veen grab in the intertidal and in shallow water.

Specimens were preserved with formaldehyde in the Laboratory of Marine Biology at Barra de Navidad (Universidad Autonoma de Guadalajara) and sent to Mazatlan for identification.

All identified material has been deposited in the Reference Collections of Mazatlan and Barra de Navidad.

Material examined: Four specimens, juveniles, collected in Rio Marabasco (4 November 1983); muddy bottom.

Material examined: Three specimens, one ovigerous female, collected in Pinctada mazatlanica in the rocky shore (21 August 1984).

Distribution: The species occurs from the Gulf of California, south to Colombia and the Islas Galapagos; also along the coast of Florida (Wicksten, 1983).

Material examined: One specimen en from the intertidal of Isla de Puercos, under mangrove cover; no host registered (8 September 1983).

Distiibution: The species was previously known from only two localities: Puerto Escondido, Gulf of California and Bahia de Tenacatita, Colima, Mexico (Wicksten, 1983).

Matetial examined: Two specimens from the intertidal of Isla de Puercos, among mangrobve (25 August, 1983).

Distribution: The species is reported from Bahia Magdalena and the Gulf of California, south to Panama and the Islas Galapagos; on the-southwestern coast of Mexico, it has been collected at Acapulco, Guerrero (Wicksten, 1983).

Material examined: one ovigerous female collected in Rio Marabasco, on muddy bottom (4 November 1983).

Distribution: From San Diego, California, south to Panama and Islas Galapagos, including the Gulf of California (Abele, 1972; Wicksten, 1983; Hendrickx and Wicksten, 1987).

Material examined: One, specimen collected with a Van Veen on the inner side of Barra de Navidad Lagoon on muddy botton (10 December 1983).

Disuibution: Widely distributed throughout the Gulf of California; also reported from Acajutla, El Salvador; also on the Atlantic side of America (Wicksten, 1983). It is an occasional species in the area, from the intertidal to 3.5 m (Alvarez del Castillo, 1983).

Material examined: Two specimens (one ovigerous female) from Rio Marabaseo (4 November 1983), on muddy bottom; four specimens (one ovigerous female) buried into soft muddy sediment, in the intertidal under mangrove cover (21 January 1984).

Distribution: From Estero San Carlos, Guaymas, Sonora, to Barra de Navidad Jalisco (Hendrickx and Wicksten, 1987).

The Barra de Navidad Lagoon receives a small supply of soft water during the rainy season and is permanently connected to the sea by a deep channel. Salinity is almost always close to sea-water, except for the inner part of the system where the Río Marabasco connects to the Lagoon (Alvarez del Castillo, 1983). The caridean species that were collected are predominantly marine. The Macrobrachium sp, collected in the river, is clearly a softwater species while Alpheus mazatlanicus has a tendency to oecur in brackish water or in mesohaline sea water (Hendrickx and Vickstin, 1987).

The author wishes to thank the Staff of the Barra de Navidad Marine Laboratory, Universidad Autonoma de Guadalajara, for collecting the material.

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