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Rate of Development and Viability of Hybrids Between Drosophila Pavani and Drosophila Gaucha under Competitive Conditions
Author(s) -
Brncic Danko,
Budnik Myriam
Publication year - 1974
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1935158
Subject(s) - hybrid , biology , sibling species , drosophila (subgenus) , sibling , zoology , ecology , botany , genetics , economics , gene , management
In experiments on competitive ability of the preadult hybrids between the sibling species, Drosophila pavani and D. gaucha with a limited supply of food and space, the egg—to—adult survival of the hybrids is higher than that of the corresponding parental species, when the preadults are reared alone. When these hybrids are reared together with the parental species, there is a decrease in their variability, especially with respect to D. gaucha. The developmental period of the hybrids tends to shorten in the presence of D. gaucha, but in the presence of D. pavani and at high densities the hybrids show prolonged development. On the other hand, D. pavani and D. gaucha increase their viability significantly in the presence of the hybrids at high densities. The conclusion is that the growth of hybrids is strongly interfered with the presence of the parental species under overcrowded conditions, while the parental species, D. pavani and D. gaucha, are facilitated."