Parasitological Biodiversity Of Juvenil Mugil Liza From Two Sites In The Samborombon Bay, Argentina

MONTES M MARTIN; MARTORELLI, SERGIO R.

Nashville, Tennessee

Congreso; Aquaculture 2013; 2013

World Aquaculture Society

The objective of this study was to estimate the parasitological biodiversity in juveniles of mullets (Mugil liza) in two different feeding areas from SamborombBay (35 57This place is one of the most extensive, rich and important wetland of Argentina, and was declared Ramsar Site in 1997. Samples of juvenile mullets were collected from two sites between 2009 and 2010: site 1- Ajo River (A.R) in the south of the bay (n= 148 mullets), and site 2-Salado River Channel (S.R.C) in the north (n= 130 mullets). Fish were fixed in 10% formalin and revised for parasites under stereomicroscope. We found a total of thirteen species of parasites: six digenean (metacercariae and adults), three copepods, three monogenean, and one acanthocephalan. In this study we used Bayesian statistics to calculate the prevalence (mean and credible interval) from the two sites (Table 1) and then, the diversity indexes was calculated using the WinBUGS software (Table 2). The Deviance Information Criterion (DIC) was calculated for a LogNorm and Gammab models. The DIC value was 179.07 for Gamma model, and 196.2 for LogNorm model. This indicating that the gamma model seemsb to be the best model between them. The Pielou and complementary Simpson index reveal a better equitability in S.R.C, despiten higher species richness in A.R. But, when analyzes the Shannon-Wiener index, we conclude that the S.R.C is more diverse. Thensimilarity between sites is 78%. The differences between sites seem to be due to bigger marine influence in site 1. Site 2 is moren influenced by La Plata River mouth.