Jaquemet S., Smale M.J., Blaison A., Guyomard D., Soria Marc. (2012). First observation of a pregnant tiger shark (Galeocerdo cuvier) at Reunion Island, Western Indian ocean [short note]. Western Indian Ocean Journal of Marine Science, 11 (2), p. 205-207. ISSN 0856-850X.
Titre du document
First observation of a pregnant tiger shark (Galeocerdo cuvier) at Reunion Island, Western Indian ocean [short note]
Année de publication
2012
Type de document
Article
Auteurs
Jaquemet S., Smale M.J., Blaison A., Guyomard D., Soria Marc
Source
Western Indian Ocean Journal of Marine Science, 2012,
11 (2), p. 205-207 ISSN 0856-850X
The tiger shark Galeocerdo cuvier is a common predator in tropical oceans although its biology is still not well documented, especially in the western Indian Ocean. We report the first observation of a pregnant tiger shark captured at Reunion Island in November 2012. A total of 42 embryos without external yolksacs, measuring 750-846 mm in total length, were found in the two uteri. The sex ratio was nearly 1:1 and males and females did not differ in size or weight. Although the embryos were fully formed, the teeth had not yet erupted through the gums, suggesting that birth would take place a few weeks later. This information is in agreement with observations made in other locations, including the limited data available for this region, suggesting that mating occurs in late winter and parturition in summer.
Plan de classement
Poissons [034BIOVER01]
Descripteurs
POISSON MARIN ; CYCLE DE REPRODUCTION ; EMBRYOLOGIE ; REQUIN
