Influence of water management, photoperiod and aeration on growth, survival, and early spat settlement of the hatchery-reared green mussel, Perna viridis

Fedelia Flor C Mero,Lily Anne G Piňosa,Donna C Rendaje,Josel F Cadangin,Christine S Verde,Jean Rose H Maquirang,Mary Jane S Apines-Amar,Fiona L Pedroso

doi:10.1007/s40071-019-0226-9

Fedelia Flor C Mero, Lily Anne G Piňosa + Show 6 more

Open Access

https://doi.org/10.1007/s40071-019-0226-9

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Abstract

In an attempt to induce early spat settlement and improve mussel seed production, this study aims to determine the influence of water management, photoperiod, and aeration, on the growth, survival and settlement of green mussel (Perna viridis). Water in the pediveliger rearing tanks was changed every day, every 3 days and every 5 days for the water-management experiment. Pediveligers were exposed in 24L:0D h (light: dark), 12L:12D h and 0L:24D h conditions for the photoperiod experiment. Three aeration intensities were also tested—mild (10 L h−1), moderate (20 L h−1), and strong (30 L h−1). This study demonstrated that changing water every 3 days was effective in maintaining the rearing water quality and improving the growth and survival of P. viridis larvae. Highest growth and survival rates were observed in P. viridis spats grown in 0L:24D h photoperiod. There was no significant difference in the settlement rate of larvae exposed to different photoperiods. Mild aeration has shown to improve the growth of P. viridis larvae, but higher survival and settlement rates were attained in the strongly-aerated conditions. Therefore, when the larvae start to settle, it is recommended to expose them to darkness, change the water every 3 days and provide a strong aeration to be able to attain high survival and settlement rates, and bigger spats.

Highlights

Asian green mussel Perna viridis, or green mussel is a large mytilid bivalve present along Southeast Asian region encompassing countries like Thailand, Indonesia, Philippines, and in the Indian peninsula (Sallih 2005; Vakily 1989; Hickman 1992)
This study demonstrated that changing water every 3 days was effective in maintaining the rearing water quality and improving the growth and survival of P. viridis larvae
There was no significant difference in the settlement rate of larvae exposed to different photoperiods

Summary

Introduction

Asian green mussel Perna viridis, or green mussel is a large mytilid bivalve present along Southeast Asian region encompassing countries like Thailand, Indonesia, Philippines, and in the Indian peninsula (Sallih 2005; Vakily 1989; Hickman 1992). In the Philippines, mussels are considered economically important bivalve species with more than 50 years of grow-out aquaculture history (Duncan et al 2009). Int Aquat Res (2019) 11:159–172 diminishing spatfall in the natural environment. Factors affecting this trend were hypothesized as a result of global warming, pollution, and other anthropogenic activities (Cebu and Orale 2018; Wang et al 2011; Vijayavel 2010)

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