Population dynamics of Potamocorbula faba Hinds, 1843 (Bivalvia: Corbulidae) in Permisan Bay, Sidoarjo, Indonesia

Potamocorbula faba is a benthic species that can be found scattered in high intertidal zone of
Permisan bay, Sidoarjo, Indonesia. Some variables in population dynamics, such as asymptotic length
(L∞), growth coefficient (K), mortality rate (Z, F and M), exploitation rate (E) and recruitment pattern of
P. faba were estimated from length frequencies analyses by means of FAO-ICLARM Stock Assessment
Tools (FISAT). Results showed that growth performance index (φ) was 2.34, asymptotic length (L∞) was
16.40 mm and growth coefficient (K) was predicted to be 0.81 year-1. Total mortality (Z) for P. faba was
2.17 years-1, while fishing mortality (F) was 0.27 year-1 and natural mortality (M) was 1.90 year-1. Total
mortality rate was quite high due to habitat destruction by pollutant. Reproduction strategy of P. faba
indicates recruitment occurred every month. Overall during the course of the study, there have been two
different peaks, i.e. major recruitment commenced in March 2015 (24.32%) and the minor one was in
October 2014 (4.16 %).