Prey-specific index of relative importance (%PSIRI) of the overall diet of blue sharks (Prionace
glauca) sampled in northern Peru between February and December 2015, by size class and longitude of fishing ground.
Biologists at the SWFSC also designed a protocol for collection of life history and distribution data on swordfish, marlins (primarily striped marlin, Tetrapturus audax), and pelagic sharks (primarily common thresher, Alopias vulpinus; shortfin mako, Isurus oxyrinchus; and blue, Prionace
Results of NMFS's Cooperative Shark Tagging Program reveal that the blue shark (Prionace
glauca) is the only species with recorded movements of over three thousand nautical miles.
Entre agosto de 1995 y agosto de 1997, se llevaron a cabo 26 campanas de pesca en el Pacifico de Nicaragua Utilizando el palangre como arte de pesca y un batiter-mografo, fue posible relacionar algunas variables fisica con la distribucion espacial y vertical de las diferentes especies de tiburun capturadas: thresher (Alopias vulpinus) azul (Prionace
glauca), gris (Carcharhinus falciformis) y martillo (Sphyrna lewini), La distribuciun espacial de todas las especies mostro una significativa aglomeracion en el extremo sureste del Pacifico nicaraguense, justo en el area de influencia del afloramiento estacional del Golfo de Papagayo.
Movement of blue shark, Prionace
glauca, in the north-east Atlantic based on mark-recapture data.
Thus, the principal goal of this study was to compare the trophic position of two sharks Prionace
glauca (Linnaeus, 1758) and Isurus oxyrinchus (Rafinesque, 1810) -both well known as top predators in the southeastern Pacific waters (SEP)-, in two periods of time.
Artisanal shark catches are dominated by hammerheads, Sphyrna spp., but also include bull sharks, Carcharhinus albimarginatus; tiger sharks, Galeocerdo spp.; black tip, Carcharhinus limbatus', white tip, Carcharhinus albimarginatus; thresher, Alopias superciliosus; and blue sharks, Prionace
glauca (Teplitzky, 2005).
Other species that have occasionally harmed humans are the blue shark (Prionace
glauca), shortfin mako, great hammerhead shark (Sphyrna mokarran), oceanic whitetip shark (Carcharhinus longimanus), lemon shark (Negaprion brevirostris), dusky shark (Carcharhinus obscurus), gray reef shark (Carcharhinus amblyrhynchos), bronze whaler shark (Carcharhinus brachyurus), blacktip reef shark (Carcharhinus melanopterus), and blacktip shark (Carcharhinus limbatus).
This is especially the case for more internally hooked fish as has been reported for blue sharks (Prionace
glauca; Borucinska et ah, 2001; Borucinska et al., 2002) and lemon sharks (Danylchuk et al., 2014).
Preliminary studies on the age and growth of the blue shark, Prionace
glauca, common thresher, Alopias vulpinus, and shortfin mako, Isurus oxyrinchus, from California waters.
One of the earliest works on fishes in North America is Smith's "Natural History of the Fishes of Massachusetts" (1833) which included eight species of sharks (and four rays), most of which can clearly be identified: Smooth Dogfish, Mustelus canis\ Spiny Dogfish, Squalus acanthi as', White Shark, Carcharodon carcharias; Blue Shark, Prionace
glauca; Common Thresher, Alopias vulpinus; Hammerhead Shark, Sphyrna sp.; and Basking Shark, Cetorhinus maximus.
Furthermore, for studies that have used longer-term popup satellite tags, mortality was reported to occur shortly after release: 87% of mortalities happened within 60 min for dusky sharks (Carcharhinus obscurus) and sandbar sharks (Marshall et al., 2015); 100% of mortalities occurred within 4 h for common thresher sharks (Heberer et al., 2010); >50% for blue sharks (Prionace
glauca), shortfin makos, and porbeagles (Lamna nasus) died within 6 h of release (Campana et al., 2016); and >50% of silky sharks died within 1 day of release (Hutchinson et al., 2015).