There is a lack of basic biological information on the shark species caught in the region around the "Tres Smooth hammerhead Sphyrna zygaena (35%), silky shark Carcharhinus falciformis (27%) and blue shark Prionace glauca (25%) were the most important species of 2 004 sharks observed at La Cruz de Huanacaxtle. At Isabel Island, the most important species of 7 464 sharks sampled were S. lewini (49%) and Pacific sharpnose shark Rhizoprionodon longurio (45%). This paper describes the shark species caught at these islands, the catch per unit effort of the principal species throughout the fishing season, their length frequency distributions and percent mature, and gear selectivity issues.

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Resilience of Sphyrna lewini, Rhizoprionodon longurio, and Carcharhinus falciformis at the entrance to the Gulf of California after three decades of exploitation Resiliencia de Sphyrna lewini, Rhizoprionodon longurio y Carcharhinus falciformis en la entrada del golfo de California después de tres décadas de explotación