Assessment of Corbicula moltkiana Growth by Different Methods on Variation of Substrates in Lake Maninjau, West Sumatera, Indonesia

• Published in: IOP conference series. Earth and environmental science 2021-11, Vol.934 (1), p.12068
• Main Authors: Ibrahim, A, Lukman, Dina, R
• Format: Article
• Language: English
• Subjects: Aquatic animals; Aquatic biota; Baskets; Biota; Corbicula moltkiana; Fisheries; Fishery resources; Gravel; Lakes; Mollusks; Mussels; Population; Population growth; Sampling; Sand; Sand & gravel; Shellfish; Stone; Substrates
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/934/1/012068

Corbicula moltkiana is a mussel species in Lake Maninjau and one of the targeted fisheries resources in the lake. This study aimed to determine the feasibility of a controlled growth experiment of mollusk biota in describing their natural growth. The assessment was carried out in areas with different habitats in shore lake, namely sand and gravel-stone substrates. A consecutive 12 month- sampling was carried out from June 2013 to May 2104 using a Surber sampler at a 1-3 m depth were used to assess the wild population growth. Moreover, the growth of the controlled population was observed by rearing various sizes of mussels in artificial substrate namely three small baskets which installed in the shore area with 1-3 m depth at each station for four months. Monthly sampling was carried out to measure the shell length. The growth of C. moltkiana on wild population by VBGF methods show that at the gravel-stone substrate was higher, but the growth a controlled population in artificial substrate seemed in the sand substrate was higher than that in the gravel-stone substrate. The growth of aquatic biota in a controlled system (especially C. moltkiana ) does not always reflect similar conditions to their wild growth.