INVESTIGADORES
CRESPO enrique alberto
artículos
Título:
Record of a specimen of Shepherd´s Beaked Whale (Tasmacetus shepherdi) from the coast of Santa Cruz, Argentina, with notes on age determination
Autor/es:
CRESPO, E. A.; FLORENCIA GRANDI, MARÍA; ALEJANDRO BUREN,; ANÍBAL GARCÍA, NÉSTOR; MARTÍN SVENDSEN, GUILLERMO; LAURA DANS, SILVANA
Revista:
The Latin American journal of aquatic mammals
Editorial:
SOLAMAC
Referencias:
Lugar: Rio de Janeiro; Año: 2005 vol. 4 p. 97 - 100
ISSN:
1676-7497
Resumen:
In
September 2003 a
specimen of Shepherds beaked whale, Tasmacetus
shepherdi, was found stranded on a beach close to
Santa Cruz lighthouse (50º 09
S, 68º 21
W) in the vicinity of Puerto Punta Quilla (Provincia de Santa Cruz,
Argentina). The specimen was determined as a male because the tusks were eroded,
evidence of eruption in life (Moore, 1968). Vertebral epiphyseal fusion was
complete and the pulp cavities of the teeth were filled, indicating that the
animal was physically adult (Moore, 1968).Four
teeth were used for age determination. The tusks were cut on a sagital and
lingua-bucal medial plane, while a right mandibular tooth was sectioned
sagitally. Teeth were decalcified in RDO, a commercial mixture of acids, and
sectioned on a freezing microtome, at 18μm
thick. Sections were stained with Mayers Haematoxylin and mounted with
Canadian balsam (Perrin et al., 1980;
Crespo et al., 1994). The
reading of the cementum layers in the right mandibular tooth was 23 GLGs.