Naslov
INTERACTION BETWEEN Ceratothoa oestoides AND Dicentrarchus labrax IN AQUCULTURE (EASTERN ADRIATIC SEA, CROATIA)

Autori
Kolega, Matko ; Čolak, Slavica ; Barić, Renata ; Mejdandžić, Danijel ; Vrkljan, Josip ; Mustać, Bosiljka ; Petani, Bruna ; Župan, Ivan ; Šarić, Tomislav

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

Skup
Aqua 2018 World Press Conference

Mjesto i datum
Montpellier, Francuska, 25.08.2018. - 29.08.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Ceratothoa oestroides ; Dicentrarchus labrax ; farming conditions ; Adriatic Sea ; fecundity

Sažetak
The cymothoid isopod (Ceratothoa oestroides, Risso 1916) is protandric hermaphroditic parasite. It is parasitizing in the buccal cavity and can cause significant production losses in cage reared sea bass (Dicentrarchus labrax). Biology of this parasite is often studied in laboratory conditions, while the literature data on the biology of this parasite in farming conditions are scarce. Therefore, the aim of this study is to collect data on the biology C. oestroides in the sea bass cage farming conditions in the Adriatic Sea. The experiment was carried out at farm within 14 commercial net cages of 16 m diameter stocked with 200.000 fingerlings. Visual control of the entire population of fish in each cage was carried out consecutively between 2300 and 4700 degreedays (DD) of production. Total of 100 infected individuals were excluded at each sampling. Afterwards, biometric analyses were performed on infected fishes and on C. oestroides males and females. Sexual maturity and fecundity on C. oestroides females was determined. In addition, sea temperature were recorded daily. Fish infected with C. oestroides were found in all cages. Overall, the percentage of infection ranged from 0.19% to 2.53%. Also, mature females were found in all cages, in range from 2% to 18%. Pearson correlation coefficient showed that there was a statistically significant and moderate positive correlation between DD and length of female parasites (r = 0.512, p <0.001) and statistically significant and strong positive correlation between DD and length of male parasites (r = 0.601 ; p <0.001 ; Figure 1). A statistically significant but weak positive correlation between the length of the female parasites and the number of pulli which it contains (r = 0.375, p <0.001), as well as statistically significant strong positive correlation between the length of the fish and the length female (r = 0.678, p <0.001) and male (r = 0.607, p <0.001) parasites were also established. However, the correlation between DD and percentage of mature females was not established. The obtained data represent a further basis for considering the biology of this parasite in farm conditions in Adriatic Sea.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Veterinarska medicina, Biotehnologija

POVEZANOST RADA