Diel activity patterns of sixgill sharks, Hexanchus griseus: the ups and downs of an apex predator.
Primer registro del tiburon canabota Hexanchus griseus (Bonnaterre, 1788) (Chondrichthyes: Selachii-morpha) en la costa occidental de Baja California Sur, Mexico.
Chordata Haeckel, 1874 Chondrichthyes Huxley, 1880
Hexanchus agassizi Cappetta, 1976 Macrorhizodus praecursor (Leriche, 1905) Woellsteinia kozlovi Adnet, 2006 Anomotodon sp.
Keywords: Shark,
Hexanchus griseus, Echinorhinus brucus.
Taxon Stratigraphy (Allomember) CHONDRICHTHYES HEXANCHIDAE Heptranchias howelli Cucullaea I
Hexanchus sp.
Requiem sharks NI Alopias superciliosus Bigeye thresher Zorro Carcharhinus limbatus Blacktip shark Canalero Squalus cubensis Cuban dogfish Galludo, gallo
Hexanchus nakamurai Bigeye sixgill shark Marrajo Mustelus canis Dusky smoothhound Boquidulce Sphyrna zygaena Smooth hammerhead Cabeza de martillo Nombre cientifico PD PC Total Carcharhinus perezii 39 39 Isurus oxyrinchus 27 27 Isurus paucus 23 23 Sphyrna mokarran 1 20 21 Carcharhinus falciformis 17 3 20 Carcharhinus leucas 1 19 20 Carcharhinus longimanus 18 18 Galeocerdo cuvier 11 11 Prionace glauca 9 9 Negaprion brevirostris 9 9 Carcharhinus signatus 8 8 Carcharhinus spp.
Jack (family) Carangidae Graysby Cephalopholis cruentata Tattler Serranus phoebe Squirrelfishes (family) Holocentridae Rainbow runner Elagatis bipinnulata Black margate Anisotremus surinamensis Bigeye scad Selar crumenophthalmus Bluntnose sixgill shark
Hexanchus griseus Red hind Epinephelus guttatus Grouper (genus) Mycteroperca Scorpionfish Scorpaena sp.
Corona alta y levemente oblicua
Hexanchus griseus 6 (5) Dientes inferiores altos y cortos, sin forma de sierra, una cuspide baja y tres a cuatro cuspides curvadas laterales.
Las restantes especies de elasmobranquios, en orden de importancia, fueron tollo de cachos (Squalus acanthias Linnaeus), tollo comun (Mustelus mento Cope), raya espinuda (Dipturus trachyderma), pejegallo (Callorhynchus callorhynchus Linnaeus) y tiburon gris (
Hexanchus griseus Bonaterre) (Tabla 2).
The rest of the shark species identified were the porbeagle (Lamna nasus), bigeyed thresher shark (Alopias superciliosus), smooth hammerhead (Sphyrna zygaena), bluntnose sixgill shark (
Hexanchus griseus), sandbar shark (Carcharinus plumbeus), longnose spurdog (Squalus blainvillei), smoothhound (Mustelus mustelus), and basking shark (Cetorhinus maximus).
These included Raja spp., Scyliorhinus spp., Torpedo spp., Isurus oxyrinchus, Galeus melastomus, Dasyatidae,
Hexanchus griseus, Lamna nasus, Cetorhinus maximus, Echinorhinus brucus, and Etmopterus spp.
paucus Longfin mako Lamna nasus Porbeagle Odontaspididae Carcharius taurus Sand tiger Orectolobiformes Ginglymostomatidae Ginglymostoma cirratum Nurse Hexanchiformes Hexanchidae
Hexanchus vitulus Bigeye sixgill Heptranchias perlo Sevengill Squaliformes Squalidae Squalus acanthias Spiny dogfish Squatiniformes Squatinidae Squatina dumeril Atlantic angel Heterodontiformes Heterodontidae Heterodontus francisci Horn shark Order Family and species Code (n) Carcharhiniformes Carcharhinidae Carcharhinus acronotus Cacr003(3) C.
Even more unusual was a school of six or eight extremely large Cooke spiny sharks, Echinorhinus cookei and six-gill sharks,
Hexanchus griseus, all about 3 m long, that were observed on all three P-IV dives, swimming back and forth, milling over the summit.
Depth telemetry from the sixgill shark,
Hexanchus griseus, at Bermuda.
Unfortunately, the vertebral centra of a number of sharks, including bluntnose sixgill sharks (
Hexanchus griseus), are too poorly calcified to provide age information (Cailliet, 1990).