. Bulletin - Southern California Academy of Sciences. Science. ELASMOBRANCH FISHING ALONG THE EAST COAST OF BAJA CALIFORNIA SUR 147 Mobula munkiana o c 0 CD 14 12 10. 70 80 90 100 Disc width (cm) 120 Fig. 3. Size compositions of female (black, n = 20) and male (grey, n = 37) Munk's devil rays sampled from artisanal fishery landings in Baja California Sur during 1998 1999. summer and small sharks more often during autumn-spring. The capture of squids (especially Dosidicus gigas), a primary commercial fishery in Baja California Sur during the course of this study, was widely noted using handline
. Bulletin - Southern California Academy of Sciences. Science. ELASMOBRANCH FISHING ALONG THE EAST COAST OF BAJA CALIFORNIA SUR 147 Mobula munkiana o c 0 CD 14 12 10. 70 80 90 100 Disc width (cm) 120 Fig. 3. Size compositions of female (black, n = 20) and male (grey, n = 37) Munk's devil rays sampled from artisanal fishery landings in Baja California Sur during 1998 1999. summer and small sharks more often during autumn-spring. The capture of squids (especially Dosidicus gigas), a primary commercial fishery in Baja California Sur during the course of this study, was widely noted using handlines during summer and autumn 1999. Artisanal fisheries for sardines or tunas, however, were not observed (CON- APESCA 2003). Because relatively few camps were visited during each season and time spent at each camp was typically less than one day, the extent and activities of artisanal fishing operations in Baja California Sur may not be entirely representative of the actual conditions at the time of survey. In addition to being artisanal fishery targets, elasmobranchs are common bycatch in the industrial drift net fishery for swordfish (Xiphias gladius) and purse seine fishery for yellowfin tuna {Thunnus albacares) (Mendizabal-Oriza et al. 2000). Both of these pelagic fisheries are substantial in Baja California Sur (CONAPESCA 2003). Rays have also been reported as common bycatch in industrial shrimp fisheries off the Gulf of California coast of Baja California Sur (Fitch and Schultz 1978). Sportfishing is a major industry in Baja California Sur and also represents a considerable source of mortality for large sharks in this region (Castillo-Geniz 1992). Field efforts were conducted during winter, spring, and autumn of 1998 and during all seasons of 1999. However, sample sizes were probably insufficient to substantiate species composition during all seasons with the possible exception of spring. The total number of pangas targeting elasmobranchs could not be reliably obtained for
Size: 2601px × 960px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
