The species of the genus Sphyrna
are usually identified in longline fishing logbooks only as "hammerhead", which hinders the understanding of their geographic distribution, abundance, and importance in fisheries catches, thus contributing to a higher risk for these species (Gallagher et al.
La especie Sphyrna
media se registra en el Pacifico mexicano y es la unica que habita en ambos litorales del continente americano; sin embargo, su distribucion en el Atlantico occidental se restringe al sur del istmo de Panama y se requiere un estudio que formalice su posicion taxonomica.
The ecology of the scalloped hammerhead shark Sphyrna
lewini, in Hawaii.
Kajiura SM, Tyminski JP, Forni JB, Summers AP (2005) The Sexually Dimorphic Cephalofoil of Bonnethead Sharks, Sphyrna
Artisanal shark catch Scientific name % of catch Sphyrna
Age and growth studies of Sphyrna
lewini have been carried out at a regional level throughout the world by several authors (Chen et al.
Sinonimia: para un detallado analisis de la sinonimia de la especie Sphyrna
zygaena (Linnaeus, 1758), ver Antunes & Jonet, 1970 y Laurito, 1999.
However, there are species of shark, unique to coral reefs, which patrol the waters along the seaward face of reefs, frightening fish, swimmers and divers alike, though other species just visit the reefs (Carcharhinus leucas, Negaprion brevirostris, Gynglimostoma cirratum, Triaenodom obesus, Sphyrna
Castro (2011) reports a 45 cm juvenile nurse shark from the stomach of a 234 cm lemon shark, Negaprion brevirostris (Poey, 1868) and commented on the underwater observation of the simultaneous pursuit of an adult nurse shark by Sphyrna
mokarran (Ruppell, 1837) and Carcharhinus leucas (Valenciennes, 1839), where both sharks failed to attack and the potential prey evaded.
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
The scalloped hammerhead shark Sphyrna
lewini (Griffith & Smith, 1834) is a semi-oceanic species globally distributed in coastal, warm temperate and tropical seas.
Among the primary species in observed landings were the scalloped hammerhead, Sphyrna