Figures & data
Figure 1. Residual distribution of the ln W = ln a + b ln L regression for females (A) and males (B) of blackmouth catshark from the southern Adriatic Sea.
Figure 2. Double-logarithmic plot of body mass (W) vs. total length (L) for the two development phases of female blackmouth catshark from the southern Adriatic Sea.
Figure 3. Plot of natural logarithm of intercept (ln a) vs. slope (b) for five weight-length relationships of females (A) and males (B) of blackmouth catshark. Open circle and open lozenge indicate outliers. Female regression line: ln a = 6.242 – 4.016 b, n = 4, r = 0.999; male regression line: ln a = 5.533 – 3.802 b, n = 4, r = 0.993. (The a values reported in Capapé et al. (Citation2008) and Ragonese et al. (Citation2009), computed from length in mm, were converted in order to be compared with other a values computed from length in cm; the a values reported in Tursi et al. (Citation1993), affected by a printing mistake (G. D’Onghia pers. comm.), were corrected by a 10−1x factor).
Figure 4. Ovaries of blackmouth catshark from the southern Adriatic Sea in different maturity stages. (A) Section of an immature ovary from an individual with total length (L) 32 cm, showing unyolked oocytes of different size. Haematoxylin and eosin (H&E) staining. (B) Particular of an unyolked oocyte, 1.5 mm in diameter, from an immature specimen 34 cm L. H&E staining. (C) Particular of a yolked oocyte, 4 mm in diameter, from a ripening individual with 48 cm L. H&E staining. (D) Ovary from an individual with 50 cm L showing some mature oocytes 18 mm in diameter. Scale bars: A, 100 µm. B, C, 50 µm. D, 2 cm. Arrowhead, zona pellucida; asterisk, mature oocyte; fc, follicle cell layer; oo, ooplasm; t, theca; uo, unyolked oocyte.
Figure 5. Total length (L) of the female blackmouth catshark from the southern Adriatic Sea at different maturity stages. Vertical broken line: change point.
