High Turbidity Affects Filtration Rate and Pseudofaeces Production of the Mud Clam Polymesoda erosa (Solander 1876) (Bivalvia: Corbiculidae)

Abstract

P. erosa is an economically- and ecologically-important bivalve which thrives in brackishwater mangroves or Nypa zones. Unpredictable weather conditions and unregulated anthropogenic activities in mangrove area could lead to high turbidity conditions and possibly affect the filtering capacity of P. erosa. A laboratory experiment was conducted to determine the effects of turbidity concentration and body size on the filtration rate and pseudofaeces production of P. erosa. Filtration rates significantly increased with higher turbidity concentration up to 750 mg L-1 (P < 0.05). Pseudofaeces production also increased with increasing turbidity concentration (P < 0.05). Body size did not affect the filtration and pseudofaeces production of P. erosa. Results suggest that P. erosa is resilient to highly disturbed, turbid environments and therefore could be a potential candidate species for aquaculture.

Population dynamics of mud clam Geloina expansa (Mousson, 1849) in degraded mangrove area at Kendari Bay, Indonesia

“…Geloina expansa is an accepted name (WORMS 2023) previously known by several other names including: Geloina erosa auct. non Lightfoot, 1786) (as in Peralta and Serrano 2014;Sarong et al 2015), Polymesoda expansa Mousson, 1849 (as in Idris et al 2017;Ong et al 2017) and Polymesoda erosa Lightfoot, 1786 (as in Argente et al 2014;Dolorosa and Dangan-Galon 2014;Yap et al 2014;Duisan et al 2021). These clams bury themselves in the substrate in the mangrove forest (Argente et al 2014).…”

“…non Lightfoot, 1786) (as in Peralta and Serrano 2014;Sarong et al 2015), Polymesoda expansa Mousson, 1849 (as in Idris et al 2017;Ong et al 2017) and Polymesoda erosa Lightfoot, 1786 (as in Argente et al 2014;Dolorosa and Dangan-Galon 2014;Yap et al 2014;Duisan et al 2021). These clams bury themselves in the substrate in the mangrove forest (Argente et al 2014). Geographically, this clam has a wide distribution from all regions of the Indo-West Pacific (Poutiers 1998), including Indonesia (Sarong et al 2015;Bahtiar et al 2022b).…”