Naslov
Aquaculture of bearded horse mussel (Modiolus barbatus) and Noah's ark shell (Arca noae) - is it feasible?

Autori
Peharda, Melita ; Ezgeta-Balić, Daria ; Davenport, John

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
AQUA 2012 / New, Michael - Prag : World Aquaculture Society, 2012, 859-859

Skup
AQUA 2012

Mjesto i datum
Prag, Češka Republika, 01.09.2012. - 05.09.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
aquaculture; bivalve; Modiolus barbatus; Arca noae; growth; stomach contents

Sažetak
To assess the potential of Modiolus barbatus and Arca noae for introduction to aquaculture, we analyzed their survival and growth rates under two experimental conditions - suspended culture and on-bottom culture. Furthermore, we investigated feeding on zooplankton by these two species in experimental suspended culture and in their natural benthic environment. Fieldwork was conducted in Mali Ston Bay, the most important aquaculture area for black mussels (Mytilus galloprovincialis) and European flat oysters (Ostrea edulis) in the eastern Adriatic Sea. Specimens of M. barbatus and A. noae used in experiments were collected from natural populations in December 2009, marked with plastic tags, and randomly divided into two groups - one was suspended in the water column, while the other was placed in plastic cages that were anchored to the seabed location where these two species co-occur in natural populations. Differences were observed in terms of survival of tagged M. barbatus and A. noae during a one year study period - specimens of the bearded horse mussel exhibited much better survival rates both in suspended culture and in on bottom cages than did Noah's Ark shells. Growth of A. noae under both culture conditions was essentially negligible, while M. barbatus grew several times faster in suspended culture than on the bottom. Obtained values of growth constant K and Linf for M. barbatus suspended culture were 0.453 year-1 and 55.87 mm, while corresponding values for on bottom culture were 0.092 year-1 and 58.64 mm, respectively. Zooplankters were present in the stomachs of 86% of both M. barbatus and A. noae collected from suspended culture while those values were lower for same species from their natural environment 62% and 55%, respectively. Further on, lower mean numbers of zooplankters in stomach were recorded in the M. barbatus and A. noae from sea bed (3.5±3.9 ind. stomach-1 and 3.4±3.3 ind. stomach-1) in comparison with those suspended in the water column (29.6±56.7 ind. stomach-1 and 14.4±31.3 ind. stomach-1). Most abundant taxa were bivalve larvae followed by tintinnids, undentified eggs, copepods and gastropod larvae. There were significant differences in community composition of ingested zooplankton between specimens kept in suspended culture from those in natural population. During this study we observed so far the highest number of bivalve larvae per stomach in the specimen of M. barbatus kept suspended in water column (296 bivalve larvae). In conclusion, this study clearly shows that M. barbatus is a promising candidate for introduction to aquaculture, while A. noae is not.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Biotehnologija

POVEZANOST RADA