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Photograph by David Doubilet/NGS
Whale sharks are the world's largest living fish species, growing up to 40 feet (12 meters) long.
They move near the surface, feeding on the plankton and krill that mass in these waters during the winter months. Around the world, shark populations have declined dramatically in recent years, mainly due to overfishing.
Most at risk are migratory sharks, including whale sharks, which are known to travel more than 8,000 miles (12,875 kilometers) across the Pacific Ocean, from Mexico to the Tonga Islands, according to Zeb Hogan, a fisheries biologist with the University of Reno in Nevada. "Every time a migratory shark moves from one spot to another, there's a greater chance that it might be targeted by fishermen or subject to habitat destruction," Hogan said.
Stefan Lovgren in La Paz, Mexico
READ MORE AT: http://news.nationalgeographic.com/news/2008/01/080117-whale-sharks.html
2 comments:
Como supongo que sabes hay dos tipos de peces: los de esqueleto cartilaginoso (tiburones, rayas y quimeras) y el resto.
Una característica de los primeros es que la gran mayoría son vivíparos, lo que los hace más sensibles a su exterminio por pesca abusiva.
Querido amigo, estamos desertizando el planeta en su parte no cubierta por agua, y estamos esquilmando el mar que, a fin de cuentas, es nuestra fuente de vida.
Repito mi idea de que somos una especie muy dañina para Gaya. Y esto lo acabaremos pagando. Ya lo estamos haciendo.
Sahha
Querido Julio, eres una fuente de saber y de la razón correctamente expuesta. Qué placer.
Estoy contigo.
Sahha.
Daniel.
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