Gonadal Development and Fecundity of Swimming Crab Portunus segnis (Forskal, 1775) in Coastal Waters of Balochistan, Pakistan
Gonadal Development and Fecundity of Swimming Crab Portunus segnis (Forskal, 1775) in Coastal Waters of Balochistan, Pakistan
Shazia Rasheed1,*, Ehsan Ullah Mengal1, Robina Manzoor2 and Azra Bano1
Fig. 1.
Measurement of Short Carapace Width (SCW) for study of reproductive biology of Portunus segnis.
Fig. 2.
Macroscopic appearance of female ovary to show different maturity stages of female P. segnis, (A) immature, (B) maturing, (C) fully mature, (D) spent.
Fig. 3.
Egg stages of berried female crab of P. segnis. Stage I: The egg mass light yellow to deep yellow. Stage II: Gray colour egg mass. Stage III: Black colour egg mass.
Fig. 4.
Percentage of gonad maturity stages in male (A) and female (B) P. segnis.
Fig. 5.
The logistic curves of 50 % maturity in various size classes of the male (A) and female (B) Portunus segnis (N = 110).
Logistic model: y = a / (1+b × exp (-cx))
Coefficient data: Male; a= 9.95274370365E+001; b= 1.95578686191E+007; c= 2.12857746078E-001; Standard error: 4.7234002; Correlation Coefficient: 0.9962958.
Female; a = 1.00217211735E + 002; b= 2.01356887217E + 005; c= 1.56928940609E-001; Standard error: 1.6418724; Correlation coefficient: 0.9994943.
Fig. 6.
Comparison between short carapace width (SCW) (A) and total body weight (B) and fecundity of Portunus segnis.
Equation 1
August 2023
Vol. 55, Iss. 4, Pages 1501-2000
