| dc.description.abstract | The research was conducted in several small lakes at Bogor regency and
municipality. The objectives of this research was to identify species diversity, the biology
of population and the environment characteristics of fresh water Unionidae mussels.
The research found only two species, Anodonta woodiana dan Pilsbryconcha exilis
which had similarity in the biological aspects of population. Both had highest density in the
outlet ofthe lakes and the population dispersion were cluster, according to Morisita Index.
Most of the A. woodiana population had medium to large sizes, specially population
at the middle and outlet of the lakes. These morphometric sizes tend related to the high
contents of DO, Ca, BOD, pH and sandy substrate. Most of the P. exilis population had
medium sizes, specially population at the outlet of the lakes. These morphometric sizes tend
related to the deep and clear water with high contents of TOM, COD and muddy substrate.
In both species there were no tend of the obesity, relative height and reproduction condition
to the environment characteristics.
Part of the A. woodiana population (46,11%) found in first stadium of gravidity (no
larvae inside) followed by fourth stadium of gravidity (brood mature larvae). Almost all of
the P. exilis population (93,96%) found in first stadium of gravidity (no larvae inside). | |
