Carcharhinus plumbeus (Nardo, 1827)

Alkusairy, Hasan & Saad, Adib, 2018, Species Composition, Diversity and Length Frequency of By-Catch Sharks from the Syrian Coast, International Journal of Research Studies in Zoology 4 (1), pp. 11-21 : 15

Carcharhinus plumbeus

TL ranged between 46 and 250 cm for males and between 45 and 300 cm for females. Common TL ranged from 125 to 150 cm for males and from 135 to 160 cm for females. C. plumbeus was recorded in all months through year. Females contributed 66.8% of species catches. A significant difference between caught seasons was founded (X 2 = 11.644, P = 0.009), peak of season landing was in autumn ( Fig. 2c ), a high percentage of juveniles was recorded in winter ( Fig. 3c ). Males and females of C. plumbeus maturing at 160 cm and 172 cm TL, respectively in Mediterranean Sea (Tunisian coast) [ 18]. Based on this information, about 85% of males and 88% of females were immature of catches ( Fig. 4c ).

Figures

Figure 2. Changes of caught specimens number per season; (a) H. griseus,(b); H. perlo, (c); C. plumbeus, (d); M. mustelus (e); G. melastomus, (f); S. blainvillei, (g); C. moluccensis, (h); C. granulosus

Figure 3. Size (TL) variations of abundant and common of by-catch sharks per season off Syria coast. Males (gray), females (white): (a); H. griseus,(b); H. perlo, (c); C. plumbeus, (d); M. mustelus (e); G. melastomus, (f); S. blainvillei, (g); C. granulosus, (h); C. uyato

Figure 4. Total length (TL) frequency distributions (percent of species catch) of the abundant and common bycatch sharks off Syrian coast. Males (black), females (white). Vertical lines indicate maturity size of males (sporadic) and females (continuous) following literature: (a); H. griseus,(b); H. perlo, (c); C. plumbeus, (d); M. mustelus (e); G. melastomus, (f); S. blainvillei, (g); C. granulosus, (h); C. uyato