Spawning and larvae production of common pandora,
Pagellus erythrinus L.
Y.
Guner, O. Ozden, M. Altunok, E. Koru, V. Kizak-2004
Israeli
Journal of Aquaculture – Bamidgeh, 56(3): 209-217
Abstract:
Spawning of the common pandora (Pagellus erythrinus L.) in captivity
was studied at ambient temperature (21.2 +/- 1.2 °C) during the breeding
season in 1998. Broodstock were cultivated in net fishpens and spawned in
large fiberglass tanks (10 m diameter) between June and July. Approximately
33.2 million eggs were collected from 30 mature 4-7 year old females, 97% of
which were buoyant healthy eggs with diameters ranging 753-801 µm. The eggs
were incubated at 19, 21, or 23 °C and development and morphological
changes were observed until day 50. The best hatching rate (88.9%) was
obtained at 19 °C. Swim bladder inflation occurred 8-20 days after
hatching. The average survival at day 50, at an initial density of 40
larvae/l, was 3.2%. Exogenous feeding began on day 3. Larvae were first fed
rotifers, Brachionus plicatilis, and later Artemia nauplii. Larvae completed
yolk absorption 78 hours after hatching. A green water environment was
maintained by introducing cultured microalgae (Nannochloropsis oculata and
Tetraselmis suecica). Larvae (13.3 mm) transformed into juveniles (18.71 mm)
29-37 days after hatching.
(Ege
Univ., Fac. Fisheries, Dept.
Aquaculture, Bornova Kampus, Tr-35100 Izmir, Turkey, e-mail: guner@sufak.ege.edu.tr)