Pristiophoriformes

>> Classification > Pristiophoriformes > Requin-scie flutian

Pliotrema warreni - Sixgill sawshark - Sechskiemen-Sägehai - Tiburon sierra del Cabo

Requin découvert par Regan en 1906.


Morphologie

 



Museau long orné de chaque côté d'une vingtaine de dents rostrales qui leur donnent l'aspect d'une lame de scie ;

6 paires de fentes branchiales ;

Dents latérales ainsi que par deux longs barbillons prénarinaires ;


Les rares spécimens observés l'ont été en Afrique du Sud et dans l'océan Indien, le long des côtes du Mozambique.


 

 

Caractéristiques
  ____________________________________________________________________________________________________________________________________
  Taille Jusqu'à 140 cm.
  ____________________________________________________________________________________________________________________________________
  Masse  
  ____________________________________________________________________________________________________________________________________
  Nocturne/Diurne  
  ____________________________________________________________________________________________________________________________________
  Alimentation Poissons osseux, crevettes, calmars, poulpes.
  ____________________________________________________________________________________________________________________________________
  Habitat Côtier et benthique, bancs de sable et récifs, il évolue jusqu'à 430 m.
  ____________________________________________________________________________________________________________________________________
  Distribution
Eaux côtières du Kenya au Cap.
  ____________________________________________________________________________________________________________________________________
 

Maturité sexuelle

Atteinte 80 cm pour les mâles et à 110 cm pour les femelles.
  ____________________________________________________________________________________________________________________________________
 

Mode de reproduction

Ovovivipare.
  ____________________________________________________________________________________________________________________________________
  Période de reproduction  
  ____________________________________________________________________________________________________________________________________
  Espérance de vie  
  ____________________________________________________________________________________________________________________________________
  IUCN Liste rouge
  ____________________________________________________________________________________________________________________________________

 


Distribution
  ____________________________________________________________________________________________________________________________________
 

 
  ____________________________________________________________________________________________________________________________________

 

 

Reproduction
  ____________________________________________________________________________________________________________________________________
  De 5 à 7 juvéniles mesurant 35 cm à la naissance.
  ____________________________________________________________________________________________________________________________________

 

 

Dangers
  ____________________________________________________________________________________________________________________________________
  Dangerosité

Aucune.

  ____________________________________________________________________________________________________________________________________
  Degré
  ____________________________________________________________________________________________________________________________________
  Exploitation humaine Captures occasionnelles à la ligne ou au filet.
  ____________________________________________________________________________________________________________________________________

 

 

Particularités
  ____________________________________________________________________________________________________________________________________
 

Il se sert de son rostre pour tuer ses proies.

  ____________________________________________________________________________________________________________________________________

 

 

Classification
  ____________________________________________________________________________________________________________________________________
  Règne Animalia
  ____________________________________________________________________________________________________________________________________
  Embranchement Chordata
  ____________________________________________________________________________________________________________________________________
  Classe Chondrochtyes
  ____________________________________________________________________________________________________________________________________
  Sous-classe Elasmobranchii
  ____________________________________________________________________________________________________________________________________
  Super-ordre Euselachii
  ____________________________________________________________________________________________________________________________________
  Ordre Pristiophoriformes
  ____________________________________________________________________________________________________________________________________
  Famille Pristiophoridae
  ____________________________________________________________________________________________________________________________________
  Genre Pliotrema
  ____________________________________________________________________________________________________________________________________
  Espèce Pliotrema warreni
  ____________________________________________________________________________________________________________________________________

 

 

Photos
  ___________________________________________________________________________________________________________________________________
 

  ___________________________________________________________________________________________________________________________________

 

 

Vidéos
  ___________________________________________________________________________________________________________________________________
 

  ___________________________________________________________________________________________________________________________________