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Effects of salinity on the larvae of some Afrotropical anopheline mosquitoes
Author(s) -
COETZEE MAUREEN,
SUEUR DAVID LE
Publication year - 1988
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1111/j.1365-2915.1988.tb00212.x
Subject(s) - biology , theobald , larva , instar , salinity , bionomics , environmental factor , ecology , zoology
. Laboratory experiments showed that the larvae of some freshwater‐breeding Afrotropical anopheline species exhibit various degrees of tolerance to 25% sea‐water. At 24 o C, survival rates from egg to fourth instar larva were significantly less in salt‐water than in freshwater for four species: 39.5% versus 55.4% for Anopheles tenebrosus Dönitz, 31.9% versus 86.2% for An. mousinhoi De Meillon & Pereira, 3.5% versus 67.9% for An. pharoensis Theobald and 3.9% versus 41.9% for An. quadriannulatus (Theobald). Conversely, An. merus Dönitz showed a significantly better survival rate of 46.4% in 25% sea‐water compared with 15.5% in freshwater. Simulated winter conditions did not significantly change these differential survival rates of An. merus. Effects of salinity on the anal papillae of third instar larvae are discussed.