Document Detail

Aspects of the reproductive biology of the shortfin Mako, Isurus oxyrinchus (Elasmobranchii Lamnidae), in the southeastern region of Brazil.
MedLine Citation:
PMID:  12489396     Owner:  NLM     Status:  MEDLINE    
Uteri from four pregnant females and two newborn of shortfin mako, Isurus oxyrinchus, were collected in the southeastern region of Brazil, during September, October, and November of 1993 and 1994. All embryos were near-term with developing dentition and inner organs. Total length ranged from 64.5 to 72.0 cm, and the maximum number of embryos observed in a litter was 20. These observations further confirmed oophagy as a form of nutrition in this species, and its periodicity. The presence of teeth in the embryos' stomachs suggest that tooth replacement begins in the uterine phase.
F E S Costa; F M S Braga; C A Arfelli; A F Amorim
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Publication Detail:
Type:  Journal Article     Date:  2002-08-26
Journal Detail:
Title:  Brazilian journal of biology = Revista brasleira de biologia     Volume:  62     ISSN:  1519-6984     ISO Abbreviation:  Braz J Biol     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-12-19     Completed Date:  2003-03-03     Revised Date:  2007-09-06    
Medline Journal Info:
Nlm Unique ID:  101129542     Medline TA:  Braz J Biol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  239-48     Citation Subset:  IM    
Instituto de Biociências, Unesp. Rio Claro.
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MeSH Terms
Animals, Newborn
Embryo, Nonmammalian / anatomy & histology*,  physiology
Sharks / embryology*

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