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Intraspecific Variation in Osmotic Abilities of Cyprinodon Variegatus Lacepede from the Texas Coast
Author(s) -
Martin F. Douglas
Publication year - 1968
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1934510
Subject(s) - intraspecific competition , biology , ecology , salinity , population , ontogeny , zoology , demography , sociology , genetics
Three populations of Cyprinodon variegatus Lacepede were compared as to their abilities to withstand sudden osmotic shocks. A population from an area having large daily and seasonal changes in salinity showed a much greater tolerance than two populations from more stable environments. This difference in ability seems to be largely due to factors experience during ontogeny and rearing of the individuals tested.