ILPLA   05424
INSTITUTO DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Density as a growth modulator in the culture of the ornamental caridean shrimp Neocaridina navidi (red shrimp)
Autor/es:
COLPO K; SGANGA D; VÁZQUEZ, NICOLÁS DARÍO; LÓPEZ GRECO LS
Lugar:
CABA
Reunión:
Jornada; VII Jornadas de Jóvenes Investigadores; 2017
Institución organizadora:
Facultad de Ciencias Veterinarias, UBA
Resumen:
The effect of density on growth, sexual proportion, survival, and biochemical composition of the red cherry shrimp, Neocaridina davidi, was studied to determine optimum rearing conditions in this ornamental species. Furthermore, it was tested whether gender segregation affected N. davidi growth and survival. For experiment 1 (effect of density), recently hatched juvenile shrimps were kept at three different densities: 2.5, 5 and 10 shrimp.L-1 (D2.5, D5 and D10 respectively). For experiment 2 (effect of gender segregation), 30-day juveniles were reared in three conditions: monosex culture with only females, monosex culture with only males and in a mixed culture (females:males 1:1) at 5 shrimp.L-1 density. Experiments lasted 90 days, and shrimps were weighted either every 30 days (exp. 1) or 15 days (exp. 2). At the end of the growth period, females at D2.5 weighted 45% more than females stocked at D10, whereas females from D5 did not differ from those of other densities. Males at D2.5 weighted 29% more than D5 and D10. Survival was high and unaffected by treatment. Sexual differentiation did not differ among treatments. Females from D2.5 had the lower lipid and protein content, which might occur if they had a higher reproductive frequency. Males from D2.5 had higher content of proteins, probably due to their greater size. Gender segregation had no effect over growth and survival; females grew up to a larger size than males both in monosex and mixed culture. Given to their not aggressive behavior and the lack of cheliped weaponry, N. davidi is highly tolerant to a high density condition, which makes it feasible as an ornamental species. Under culture conditions it is recommended that shrimp should be stocked at a density of 2.5 shrimp.L-1 to obtain larger females and males. Gender segregation is not necessary for optimal growing of the species.