Hepranchias perlo (Bonnaterre, 1788)

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

Hepranchias perlo

TL ranged between 27 and 117 cm for males and between 20 and 124 cm for females. Common TL ranged from 60 to 100 cm for males and from 55 to 100 cm for females. H. perlo was presented in all months through year except February. Percentage of females catches was 53.2%. There was a significant difference between caught seasons (X 2 = 16.400, P = 0.001), peak of season landing was in spring ( Fig. 2b ) with a high percentage of juveniles ( Fig. 3b ). [ 17] reported that males and females of H. perlo maturing at 81 cm TL and 97 cm TL, respectively in Syrian marine waters. Therefore, about 50% of males and 74% of females were immature of catches ( Fig. 4b ).

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