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Here are some of the sharks existing in Portuguese territorial waters, representing their relative sizes. More here.
Thanks for the submission!
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Undersea, Vikki Chu
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A great postcard from WildAid, for all you shark geeks out there - Happy Sunday!
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Galeus glaucus now called Prionace glauca the blue shark by BioDivLibrary on Flickr.
Blue sharks give birth to live young and can deliver up to 135 pups per litter. Courtship is believed to involve biting by the male, as mature specimens can be accurately sexed according to the presence or absence of bite scarring. Female blue sharks have adapted to the rigorous mating ritual by developing skin 3 times thicker than male skin.
The blue shark is listed as Near Threatened by the IUCN
The Plagiostomia : Sharks, skates, and rays
Cambridge, U.S.A. :Printed for the Museum,1913.
biodiversitylibrary.org/page/4371365 -
The Plagiostomia : Sharks, skates, and rays by BioDivLibrary on Flickr.
Cambridge, U.S.A. :Printed for the Museum,1913.
biodiversitylibrary.org/page/4371377 -
n184_w1150 by BioDivLibrary on Flickr.
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n180_w1150 by BioDivLibrary on Flickr.
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Studies on the trigeminal innervated muscles of n of the Selachii (sharks and rays) in consideration of their relations to neighboring organs by BioDivLibrary on Flickr.
Untersuchungen über die vom n. Trigeminus innervierte Muskulatur der Selachier (Haie und Rochen) unter Berücksichtigung ihrer beziehungen zu benachbarten Organen,.
Helsingforsiae,ex Officina typographica Societatis litterariae fennicae,1909.
biodiversitylibrary.org/page/16010565 -
Studies on the trigeminal innervated muscles of n of the Selachii (sharks and rays) in consideration of their relations to neighboring organs by BioDivLibrary on Flickr.
Untersuchungen über die vom n. Trigeminus innervierte Muskulatur der Selachier (Haie und Rochen) unter Berücksichtigung ihrer beziehungen zu benachbarten Organen,.
Helsingforsiae,ex Officina typographica Societatis litterariae fennicae,1909.
biodiversitylibrary.org/page/16010573
