Nereididae of the Suez Canal—Potential Lessepsian Migrants?
Abstract:Herein I present data on Nereididae of the Suez Canal from unreported Israeli and Norwegian expeditions. The list of species and their distributions includes unpublished Suez Canal material collected by Crossland in 1904 and 1928, and by the Cambridge Expedition of 1924. Pseudonereis gallapagensis Kinberg and Leonnates jousseaumei Gravier are recent Suez Canal records. A previously reported Leonnates sp. fragment is tentatively attributed to the Lessepsian migrant species, L. persica (Fauvel). Of the 20 nereidid species reported fro the Canal, 16 have Red Sea distributions, 4 have Mediterranean and Red Sea records. “Filtering” of Red Sea species by and within the Canal is examined. Of 39 species, s.l., reported for the Red Sea, 8 of 24 species delined as common were not found in the Canal—these included 5 of the 20 common species of the Gulf of Suez. Within the Canal, five Red Sea species were blocked in the southern section below Lake Timsah. Pseudonereis anomala Gravier, the most widely distributed of six Lessepsian migrant Nereididae, was not found in the northern part of the Canal. However, four Lessepsian migrants were found in Lake Timsah or north of it. Faunistic and ecological data are analyzed for the migrants and for some abundant euryhaline non-migrant species. The implications for the process of Lessepsian migration are discussed.
Document Type: Research Article
Publication date: March 1, 1991
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