Location records of the endemic bivalve species Corbicula linduensis and the introduced bivalve species Sinanodonta woodiana in Lake Lindu, Central Sulawesi, Indonesia.
The population of the endemic mussel Corbicula linduensis has decreased so that it is threatened with extinction in Lake Lindu. Therefore, information on the existence of this mussel needs to be re-observed as one of the bases for carrying out species conservation and habitat protection. In addition, Lake Lindu also contains the introduced mussel Sinanodonta woodiana which has been reported to have become an invasive species in several freshwater bodies in the world. Based on this, it is necessary to observe the status of this introduced mussel in Lake Lindu. The purpose of the study was to re-examine the location of the habitat of C. linduensis and the invasion of S. woodiana in Lake Lindu, Central Sulawesi. The results showed that C. linduensis was only found on the shores of the lake near the outlet and the banks of the Uwe Rawa River which is the outlet of Lake Lindu. This mussel lives in a substrate dominated by gravel and rock fragments with a little coarse sand on the banks of the Uwe Rawa River which has water the color of young tea. The largest Corbicula linduensis collected had a shell length of 3.01 cm. Then the soil layer containing the composition of C. linduensis shells in Sowea Wongko, the southern coast of Bola Island, Lake Lindu, shows that this shellfish was abundant in the past. Currently, the introduced S. woodiana shellfish has been invasive and is found living almost all along the coast of Lake Lindu because it is supported by its life cycle strategy. This shellfish can be found in three types of basic substrates, namely coarse sand, a mixture of coarse sand and mud, and mud in waters with a water depth of <3 m. The largest Sinanodonta woodiana collected had a shell length of 15.19 cm. We suspect that this shellfish entered Lake Lindu accidentally with introduced fish that were parasitized by S. woodiana larvae (glochidia).
