Medusae (Cnidaria) from the Yucatan Shelf and Mexican Caribbean
Abstract:The abundance and distribution of 43 species of hydromedusae and 3 species of scyphomedusae from the Yucatan shelf and Mexican Caribbean were studied. Zooplankton samples and hydrographic data were collected during two cruises: Proibe III and Proibe IV, conducted during April and October 1985 respectively. Collections were obtained at 114 stations (oblique tows 0–200 m), with a Bongo net of O.50-mm mesh. The identified medusan fauna is characteristic of tropical and subtropical waters. The hydro medusae Aglaura hemistoma and Liriope tetraphylla and the scyphomedusa Nausithoe punctata were the most representative species in the study area at both times. The rest of the species were registered in reduced numbers and never occurred at values over 1% of the total medusan population. Several of these species were ubiquitous, such as Bythotiara depressa, a deep water continental shelf hydromedusa which had not previously been found south of the Gulf of Mexico, and Phialidium simplex which extends its northern geographical range into the Mexican Caribbean.
Document Type: Research Article
Publication date: 1992-11-01
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