. The Biological bulletin. Biology; Zoology; Marine biology. INTERSEXUALITY IN CHERAX 21 Table IV Properties of the gonads and their products in Cherax quadricarinatus intersex individuals compared to those of males, and pre-vitettogenic (P) and vitellogenic (V) females Sample size Ovarian index (n) (GST) Oocyte diameter (Aim) Sperm Intersex 4 ± 292 ± 148= Present Male 6 — — Present Female (P) 8 ± 287 ± 87= Absent Female (V) 5 ±; 1020 ± 292'' Absent Statistical comparisons among groups were done by Simes's multiple test (for GSI) and Duncan's multiple range t
. The Biological bulletin. Biology; Zoology; Marine biology. INTERSEXUALITY IN CHERAX 21 Table IV Properties of the gonads and their products in Cherax quadricarinatus intersex individuals compared to those of males, and pre-vitettogenic (P) and vitellogenic (V) females Sample size Ovarian index (n) (GST) Oocyte diameter (Aim) Sperm Intersex 4 ± 292 ± 148= Present Male 6 — — Present Female (P) 8 ± 287 ± 87= Absent Female (V) 5 ±; 1020 ± 292'' Absent Statistical comparisons among groups were done by Simes's multiple test (for GSI) and Duncan's multiple range test for oocyte diameter. Values marked with the same superscript letters are not significantly different. Oocyte diameter represents mean of 15 oocytes per ovary. in the absence of a male opening on the same side (Fig. 3, A through D). Gonads and their products The GSI of the ovarian component of intersex individ- uals (X2, since they possess only one ovarian lobe) ( ± ) was not statistically different from that of pre- vitellogenic females ( ± ) and was significantly smaller than that of vitellogenic females ( ± ) (Table IV). The diameter of the oocyte in the ovarian component of the intersex individuals (292 ± 148 ^m) was similar to that of immature, pre-vitellogenic females (287 ± 87 ixm) and significantly smaller than that of ma- ture, vitellogenic females (1020 ± 292 ^m, n = 4 ovaries) (Table IV). As in normal males, in intersex individuals the sperm duct contained viable spermatozoa. icant in both male and intersex crayfish (r = and , respectively), but the slopes of the lines were not significantly different (Fig. 2). In intersex crayfish, the endopod of each pleopod was nearly equal in size to the exopod (EWI = + ); a similar endopod/exopod ratio was found in males (EWI = ± ). In females the endopods were longer and wider than the exopods, and the EWIs of immature ( ±) and mature ( ±
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