IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
USE OF THE FLUOROCHROME CALCEIN AS AN IN SITU GROWTH MARKER IN BRACHIDONTES RODRIGUEZII (D?ORBIGNY, 1846)
Autor/es:
TORROGLOSA, M. E.; OJEDA, M.; GIMÉNEZ, J.
Reunión:
Congreso; Mollusca 2014 El Encuentro de las Américas; 2014
Resumen:
A
capture- mark and recapture study was done in order to evaluate size increment
in the nature. B. rodriguezii
inhabits the intertidal zone with differentiated exposition into the water. The
flourochrome calcein was used in situ experiment. Field experiment was carried out
in Villa Gesell (56° 53´W -37º 16´S) a sandy beach with artificial substrates (fishing
dock) during summer. Specimens were collected by hand and calcein
solution was applied by immersion during four hours. Then small cages with the marked
mussels inside were attached again to the artificial substrate. After one
month, cages were removed. For growth estimations, marked valves were sectioned
sagitally, polish and observed through a fluorescence microscope at 450 to 490
nm. Growth rates estimations indicated a differential growth along the substrate,
related with the water exposition,. Mussels exposed to the water only in high tide showed a less
increment in length than mussels exposed to the water during the low and high
tide. Relationship between growth rates and shell length was best described by a
logarithmic function.