Categories
vol-32EXPERIMENTAL LARVAL DEVELOPMENT OF PENAEDAE
SHRIMP, TRACHYPENAEUS CURVIROSTRIS (STIMPSON,
(1860) FROM EGYPTIAN MEDITERRANEAN COAST
ABDEL RAZEK F.A.* AND TAHA S.M.
National Institute of Oceanography and Fisheries, Alexandria, Egypt
*E-mail: [email protected]
Key words: Trachypenaeus curvirostris, laboratory reared Larvae, description of larval
developmental stages.
ABSTRACT
Gravid females of Trachypenaeus curvirostris were collected from Abu-Kir fishing area,
near Alexandria city, and spawned in NIOF hatchery by natural means. This larvae were
reared from hatching to postlarval stage at 27o
C and 40 ppt. The complete larval
development and metamorphosis into post larvae was described. The larvae were reared in
a fiberglass tanks (280L). Larvae from the first zoeal stages to the third zoeal stage were
fed on algae; a mixture of Nannochloropsis oculata, cheatoceros gracilis and Tetraselmis
chii. Larvae from mysis stage to the first post larval stage were fed on Rotifers and newly
hatched nauplii of Artemia. Two naupliar stages, three protozoeal stages, three mysis stages
and one post larval stage were described and illustrated with measurements of body length
of each stage as well as substage. After about 24 days following hatching on the basis of
morphological characteristics, larval stages of T. curvirostries could be distinguished from
parallel stages of closely related species of the family Penaeidae. Shape of the growth
curve, depending on the increase in body length of the different stages and substages during
the rearing period were estimated. Preliminary rearing trials during the nursery phase for a
period of 60 days were described.
