Potamotrygon Breeding Information:
Reproductive Aspects of Freshwater Stingrays
Patricia Charvet-Almeida
The
Potamotrygonidae Family is widely distributed in several river basins of
the Neotropical region and encloses approximately 20 valid species
(Rosa, 1985). Due to these species diversity and wide range of
distribution, not all of them have been analyzed and data collecting /
analysis is still under way. Freshwater stingrays have been considered
completely adapted to freshwater environments because they have the
ability to osmoregulate and reproduce in such habitats (Thorson et al,
1983).
Potamotrygonids present a reproductive mode described as matrotrophic viviparity with development of trophonemata (Thorson et al., 1983). The reproductive aspects of freshwater stingrays species have been poorly studied and limited knowledge related to the reproductive characteristics of this group is available.
The observation of reproductive aspects of freshwater stingrays is essential to provide important data to contribute to the understanding of population dynamics of these stingrays and to provide adequate management and conservation plans.
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