title: [Does sea-grass biomass control the density of peracarids (Crustacea: Peracarida) in tropical lagoons?].
abstract: We analyzed the time-space variation of the peracarid crustaceans that inhabit seagrasses of the Alvarado Lagoon System, Veracruz, Gulf of Mexico. The organisms were collected from 108 samples in six sites with Ruppia maritima beds (December 1992 to November 1994). The assemblage was composed of 11 species. Eight species of Amphipoda (Hourstonius laguna, Cerapus benthophilus, Apocorophium louisianum, Grandidierella bonnieroides, Leptocheirus rhizophorae, Gammarus mucronatus, Melita longisetosa and Haustorius sp.), one of Isopoda (Cassidinidea ovalis) and two of Tanaidacea (Discapseudes holthuisi and Leptochelia savignyi) were identified. Taxocoenosis, density and biomass of peracarids showed seasonal pulses related to R. maritima biomass, salinity variation, epicontinental affluent and inlets. The species C. ovalis, G. mucronatus, A. louisianum and D. holthuisi were dominant.
authors.affiliation: Laboratorio de Ecología de Crustáceos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de Mexico, Ap. Postal 314, Tlalnepantla, Estado de México. ignacioc@servidor.unam.mx
authors.forename: Ignacio
authors.initials: I
authors.lastname: Winfield
authors.forename: Sergio
authors.initials: S
authors.lastname: Cházaro-Olvera
authors.forename: Fernando
authors.initials: F
authors.lastname: Alvarez
mesh_terms: D035961:Alismatales / Q000145:classification*; D000818:Animals; D018533:Biomass; D033364:Decapoda / Q000145:classification* / Q000502:physiology; D017753:Ecosystem; D008800:Mexico; D011156:Population Density