Bone mineral composition of the pectoral fins of Sotalia guianensis, from the Espírito Santo coast
Keywords:
Bone mineral composition, Pectoral fin, guiana dol´phinAbstract
Sotalia guianensis is an odontoceti cetacean that is broadly distributed on Central and South American coasts, from Honduras to Brazil, and is currently categorized as “Near threatened” by the IUCN. Previous studies proved that the mineral content increases with bone maturation and decreases after reaching maturity. Therefore, this study evaluated the mineral composition of 33 specimens of S. guianensis and verified if this factor influences bone development. The ages of the animals were estimated by counting the annual growth layers on the teeth. Bone mineral content (BMC) analysis was performed by atomic emission spectrometer. To evaluate the correlation between BMC and the variables age and total length, the Spearman correlation test was carried out. The average Ca was 360.2μg g-1, the average P was 171μg g-1, and the average magnesium was 3.34μg g-1. The analysis of the bone mineral composition of the S. guianensis species showed a low statistical correlation with age and total length; however, a higher concentration of P was observed in immature individuals compared to the mature ones.
References
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