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On the possibility of separating the sexes of the olive fruit fly Dacus oleae (Gmel.) in the pupal stage by weight
Author(s) -
Thomou H.,
Tzanakakis M. E.
Publication year - 1964
Publication title -
zeitschrift für angewandte entomologie
Language(s) - French
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0044-2240
DOI - 10.1111/j.1439-0418.1964.tb02973.x
Subject(s) - dacus , pupa , biology , sexing , tephritidae , body weight , humanities , horticulture , pest analysis , botany , zoology , art , larva , endocrinology
Summary The present work was aimed at clarifying whether sexing of Dacus oleae on the basis of pupal weight — as recently reported by other authors — was possible. The results of following the weight of 380 individuals during the pupal stage, have shown that by taking extreme weight groups we can obtain predominantly males in the light‐weights, and females in the heavy‐weights. However, the overlapping of the frequency distribution curves of the two sexes was such, that did not suggest the possibility of a practical way of separating them during the pupal stage by weight, irrespective of the age of the pupae. Résumé Les auteurs ont voulu clarifier, si une différentiation les sexes de Dacus oleae au stade pupaire, par poids était possible, comme d' autres auteurs l' avaient récemment annoncé. Après avoir observé le poids de 380 individus pendant le stade pupaire, les auteurs ont conclu que dans les poids les plus légers, la majorité des pupes se compose de males, tandis que dans les poids les plus lourds la plus part des pupes sont des femelles. Cependant les courbes de distribution pour les deux sexes se superimposent d' une façon telle qui ne permait pas de séparer les males des femelles par poids de la pupe, n' importe quel son âge.

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