. The Biological bulletin. Biology; Zoology; Marine biology. 18 A. SAGI ET AL. e 25 + E 10 â male *; isx. nipatch = +;pro ^. h- h Isx patch = +*pro I 1 1 fâ 25 30 40 45 50 55 60 65 70 Propoilus length (nun) Figure 2. Regression line for red patch length vs. propodus length in 7-month-old intersex and male Cherax quadricarinatus. moved to 400-m^, 1-m-deep earthen ponds at the Dor Fish Culture Research Station. The crayfish were har- vested after 6 months: 1058 individuals were examined externally, and their sex was determined according to the presence or absence o
. The Biological bulletin. Biology; Zoology; Marine biology. 18 A. SAGI ET AL. e 25 + E 10 â male *; isx. nipatch = +;pro ^. h- h Isx patch = +*pro I 1 1 fâ 25 30 40 45 50 55 60 65 70 Propoilus length (nun) Figure 2. Regression line for red patch length vs. propodus length in 7-month-old intersex and male Cherax quadricarinatus. moved to 400-m^, 1-m-deep earthen ponds at the Dor Fish Culture Research Station. The crayfish were har- vested after 6 months: 1058 individuals were examined externally, and their sex was determined according to the presence or absence of male or female genital openings. Individuals that had both male and female openings (total of 13) were classified as intersex. Six intersex individuals, harvested from a different population grown under similar Morphological properties of Cherax quadricarinatus intersex individuals compared to males and immature and mature females Sample size Red («) patch EWI Setation Intersex 16 + ±; Plumose Male 6 + + ; Plumose Immature Female 8 - ±; Plumose Mature Female 9 " ±' Simple and Plumose EWI = endopod width index ± SD. Values sharing the same superscript letters are not significantly different according to Sime's multiple test. conditions, were kept in aquaria at the Ben-Gurion Uni- versity laboratory for an additional 12 months. These crayfish were fed daily with fresh ground fish flesh and vegetables, temperature in the aquaria was 27° ± 2°C, and water quality was maintained by recirculating the water through a gravel biofilter. At the age of 19 months, these animals were examined as described below. Morphological observations The following morphological variables were recorded at the time of harvest (age 7 months) for each intersex individual (« = 13), for random control samples of females and males {n = 50 of each sex) from the same population, and for the 19-month-old individuals {n = 6): bo
Size: 1609px × 1552px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
