. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. 30 BULLETIN OF THE BUREAU OF FISHERIES but its lower lobe is relatively shorter than in either tiger or blue shark. The dusky shark is further distinguished from the latter by its blunt rounded nose and broad flat head. The upper teeth are broad, triangular, serrate, and with concave outer edges; the lower teeth are narrower, more pointed, with broad bases, and stand more erect. Size.—This shark occasionally reaches a length of 14 feet, but the larger specimens caught in the traps are us
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. 30 BULLETIN OF THE BUREAU OF FISHERIES but its lower lobe is relatively shorter than in either tiger or blue shark. The dusky shark is further distinguished from the latter by its blunt rounded nose and broad flat head. The upper teeth are broad, triangular, serrate, and with concave outer edges; the lower teeth are narrower, more pointed, with broad bases, and stand more erect. Size.—This shark occasionally reaches a length of 14 feet, but the larger specimens caught in the traps are usually only 6 to 9 feet long. The relation of length to weight may be judged from the fact that one 11 feet 6 inches in length weighed 650 pounds. Color.—Gray brown above; whitish below. It is said that this shark is some- times blue above. General range.—Middle Atlantic; from North Carolina to Portland, Me., on the coast of North America. Occurrence in the Gulf of Maine.—Like several other sharks the shovelnose is sufficiently plentiful all along the shores of southern New England, as far east as. Fig. 8.—Dusky shark (Carcharhinus obscurus) Cape Cod, throughout summer and early autumn, to be well known to the local fishermen. At Woods Hole, for example, it is very common, but it rarely strays into the colder waters beyond the cape. The localities within the Gulf of Maine where it has been definitely recorded are Crab Ledge off Chatham, Nahant, Massa- chusetts Bay, and Cod Ledge near Cape Elizabeth (the most northerly occurrence yet known), where one was caught in 1S64 by Capt. B. J. Willard. So rare are these stragglers that neither of the writers has ever seen one in the Gulf. In short, it has no place in the fauna of the latter except as a stray. Neither recorded cap- ture nor fishermen's report credits it to Georges or to Browns Bank. Food.—The shovelnose is a bottom swimmer, feeding chiefly on fish and squid but also eating the larger Crustacea, dinners, menhade
Size: 2713px × 921px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookcollectionbiodiversity, bookdecade1920
