2024-03-28T17:57:47Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/493382019-06-11T12:28:51Zcom_10261_77com_10261_8col_10261_330
DIGITAL.CSIC
author
Araujo, Rafael
author
Cámara, Nicolás
author
Ramos, M. Ángeles
2002
Journal of Morphology 254(3): 259-265 (2002)
0022-2887
http://hdl.handle.net/10261/49338
10.1002/jmor.10031
The metamorphosis of the glochidiumof the
critically endangered Margaritifera auricularia in the gills of a host is studied here for the first time. Siberian
sturgeon, Acipenser baeri, were infected with glochidia and regularly inspected using scanning and optical microscopy.
The mature glochidia immediately attach to the epithelium of the sturgeon gill filaments, piercing the secondary lamellae and the connective tissues, blood cells,
and vessels within the lamellae. Once the epithelium is pierced, overlapping host lamellae cover the glochidium
and form a cyst. Metamorphosis takes place inside the cyst. Sixteen days after infection the glochidium becomes
spherical in shape and the larval muscle is reabsorbed. The two adductor muscles of the juvenile are observed 34 days after infection at 16–20°C. Metamorphosis is complete in approximately 51 days at 18–22°C and in 65 days at 16–17°C. Released juveniles have a spherical shell with
a thin rim of new shell material and a finely ciliated foot.
Juvenile mean measurements are: length 190 m, width 193 m, and height 210 m. J. Morphol. 254:
259–265, 2002. © 2002 Wiley-Liss, Inc.
eng
closedAccess
Margaritifera
Glochidium
Metamorphosis
Freshwater mussels
Glochidium Metamorphosis in the Endangered Freshwater Mussel Margaritifera auricularia (Spengler, 1793): A Histological and Scanning Electron Microscopy Study
artículo