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Daphnia lumholtzi in North America: Another exotic zooplankter
Author(s) -
Havel John E.,
Hebert Paul D. N.
Publication year - 1993
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1993.38.8.1823
Subject(s) - ecology , biology , zooplankton , temperate climate , population , introduced species , fishery , geography , sociology , demography
Daphnia lumholtzi , whose natural distribution is restricted to Australia, southwest Asia, and Africa, has been detected recently at numerous localities in the southern U.S. The present study establishes that D. lumholtzi populations from two of these localities are allozymically distinct from an Australian population but genetically similar to each other, suggesting they share a common origin not from Australia. The inland distribution of D. lumholtzi suggests it was not introduced in ballast water of large ships. One of the first localities known to have D. lumholtzi is also the first North American site where Nile perch were introduced in 1983. If D. lumholtzi was introduced at this time, it has colonized sites across the southern U.S. extremely rapidly, suggesting that it will soon be common in lakes and reservoirs in warm temperate regions of North America.