for the purpose of a longline survey of sharks between Long Island and Delaware Bay from late August to early October 1961 (Casey, 1985) Over 300 sharks were caught in the survey, including white sharks, Carcharodon carcharias; tiger sharks, Galeocerdo cuvier; dusky sharks, Carcharhinus obscurus
, and other large species which were considered potentially dangerous to swimmers (Casey, 1985).
2006), Hydrolagus colliei (Reum et al, 2008) y de manera reciente en Carcharhinus obscurus
(Bejarano-Alvarez & Galvan-Magana, 2013).
This species has longterm sperm storage, a characteristic of nomadic sharks, such as Prionace glauca and Carcharhinus obscurus
, that can store sperm in specialized tubules for months or years.
Isolation, crystal structure and synthesis of arsenobetaine, a constituent of the Western rock lobster, Panulirus cygnus, the dusky shark, Carcharhinus obscurus
, and some samples of human urine.
Other shark species with this type of sperm storage are Carcharhinus obscurus
and Sphyrna lewini (Pratt 1993).
2001), and Dusky Sharks, Carcharhinus obscurus
, that had been taken incidentally in Japanese tuna fisheries in the Gulf of Mexico in the same decade, the shark stocks in the southeastern U.
Demographic analyses of the dusky shark, Carcharhinus obscurus
, in the Northwest Atlantic incorporating hooking mortality estimates and revised reproductive parameters.
Silk snapper Lutjanus vivanus Longtail bass Hemanthias leptus Dusky shark Carcharhinus obscurus
Bigeye sixgill shark Hexanchus nakamurai Atlantic croaker Micropogonias undulatus Smooth puffer Lagocephalus laevigatus Largescale lizardfish Saurida brasiliensis Atlantic spadefish Chaetodipterus faber Hardhead catfish Arius felis Grunt (family) Haemulidae Goldface tilefish Caulolatilus chrysops Southern stingray Dasyatis americana Cusk-eel (family) Ophidiidae Barracuda (genus) Sphyraena sp.
The most abundant species in the gillnet catches was a targeted shark, Carcharhinus obscurus
, which contributed more than a third to the total elasmobranch catch.
5 Percent Percent Taxonomic caught in caught in group EGM SA Selachimorpha (n = 20,242): Rhizoprionodon terraenovae, sharpnose shark 42 27 Galeocerdo cuvier, tiger shark 13 53 Carcharhinus limbatus, blacktip shark 74 22 Carcharhinus plumbeus, sandbar shark 31 36 Carcharhinus acronotus, blacknose shark 92 3 Ginglymostoma cirratum, nurse shark 71 28 Mustelis canis, smooth dogfish 15 4 Sphyrna lewini, scalloped hammerhead 64 29 Carcharhinus obscurus
, dusky shark 37 10 Carcharhinus falciformis, silky shark 42 47 Carcharhinus leucas, bull shark 81 17 Carcharhinus brevipinna, spinner shark 84 3 Carcharias taurus, sand tiger shark 0 4 Sphyrna mokarran, great hammerhead 64 21 Negaprion brevirostris, lemon shark 70 30 Carcharhinus signatus, night shark 26 62 Carcharhinus sp.
Rapid and simultaneous identification of body parts from morphologically similar sharks Carcharhinus obscurus
and Carcharhinus plumbeus (Carcharhinidae) using Multiplex PCR.
Age and growth estimates for the dusky shark, Carcharhinus obscurus
, in the western North Atlantic Ocean.