Effects of diet on Nephrops norvegicus (L.)
larval and postlarval development, growth, and elemental composition
G.
Rotlant, M. Charmantier Daures, G. Charmantier, K. Anger, F. Sarda-2001
Journal of Shellfish Research, 20(1): 347-352
(from Current Contents)
Abstract :
Few studies have been conducted on the culture of
Nephrops norvegicus larvae and none of them have permitted significant
numbers of postlarvae to be obtained (stage IV). The goal of this study was
to determine a suitable diet for rearing N. norvegicus to juvenile stage V.
Survival, molting periodicity, growth, and elemental composition (CHN) of
the young postembryonic stages were used as criteria of physiological
condition. Four different diets, fresh enriched nauplii of Artemia (FENA),
artificial feed for shrimp (AF), commercial frozen mussels (M), and
commercial frozen adult Artemia (FAA) were tested from hatching to stage V
at ambient temperature (14-16°C). Five day old stage I larvae fed with AF,
M or FAA showed a similar biomass as freshly hatched larvae, indicating that
the energy derived from food only allowed them to survive but not to gain
length. FENA was the only diet that resulted in development to stage V.
Larvae fed with FENA presented the shortest time of development, the highest
rate of survival, and the highest growth rates in size and biomass.
(CSIC, Inst Ciencias Mar, Passeig Joan Borbo S-N,
E-08039 Barcelona, Spain, e-mail: guio@icm.csic.es)