
%0 Journal Article
%A Moreno, JA 
%A Moron, JQ 
%T Comparative study of the Genus <I>Isurus</I> (Rafinesque, 1810), and description of a form (Marrajo Criollo) apparently endemic to the Azores
%J Marine and Freshwater Research
%D 1992/02/01
%V 43
%N 1
%P 109-122
%K 
%R https://doi.org/10.1071/MF9920109
%U https://www.publish.csiro.au/paper/MF9920109 
%X Numerous captures of mako sharks (Isurus sp.) are made annually by the Spanish longline fishing  fleet in the north-eastern Atlantic Ocean and the western Mediterranean Sea. Sampling of catches  allowed us to compare the morphology of two species of Isurus (I. Oxyrinchus and I. Paucus) and to  document the variations due to size or sex observed in populations exploited by the different  fisheries. The distinctive features of a form apparently endemic to the Azores ('marrajo criollo')  are defined, and the form's taxonomic identity is discussed. This form is possibly a distinct population  of shortfin mako (I. Oxyrinchus). The presence of longfin mako (I. Paucus) is confirmed in waters off  north-western Morocco, and this species is recorded for the first time off the Iberian peninsula. 
