Abstract
A set of feeding trials was carried out for different microalgal species and processed diets for the culture of the New Zealand pipi, Paphiesaustralis. Five microalgal species (Isochrysisgalbana clone T-ISO, Pavlovalutheri, Tetraselmissuecica, Chaetocerosmuelleri, and Thalassiosirapseudonana clone 3H) and three formulated diets (baker’s yeast, wheat flour, and corn flour) were fed to spat, juvenile, and adult pipi for 21 days. Unfed pipi were used in the control group. The spat and juvenile pipi showed the major shell increase with I. galbana, while the greatest wet weight increase was obtained with P. lutheri. The shells of adult pipi grew better with corn flour and P. lutheri-fed group obtained the greatest wet weight. Results of proximate analysis in adult pipi revealed that proteins and lipids were accumulated in the tissue for all fed groups, while carbohydrate levels depleted in all treatments including the control group. It is suggested that the gonads have developed during the experiment.
Highlights
One of the main constraints in bivalve rearing for aquaculture purposes is the production of appropriate diets, including live and formulated feeds
Numerous studies have investigated the nutritional value and feeding applications of a number of microalgal species (Webb and Chu 1983; Hooker 1995; Galley et al 2010). Many of these microalgal species are regularly used in hatchery production, including Tetraselmis suecica, T. chuii, Nannochloropsis atomus, N. oculata, Isochrysis galbana (T-ISO clone), Pavlova lutheri, P. salina, N
Wet weight gains were greatest for spat fed P. lutheri (125.14 ± 8.69 mg/ind.), which was significantly different from the other treatments (p [ 0.05) (Fig. 1b)
Summary
One of the main constraints in bivalve rearing for aquaculture purposes is the production of appropriate diets, including live (microalgae) and formulated feeds. The high variability in nutritional requirements among bivalve species, even within the same genus has made it difficult to generalise diet formulation techniques across species (Coutteau and Sorgeloos 1992). Numerous studies have investigated the nutritional value and feeding applications (e.g., ration size, cell concentration) of a number of microalgal species (Webb and Chu 1983; Hooker 1995; Galley et al 2010). Many of these microalgal species are regularly used in hatchery production, including Tetraselmis suecica, T. chuii, Nannochloropsis atomus, N. oculata, Isochrysis galbana (T-ISO clone), Pavlova lutheri, P. salina, N. Mamat Faculty of Applied Sciences, Universiti Teknologi MARA Perlis, 02600 Arau, Malaysia
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