Effect of
sediment on growth and survival of post-larval Litopenaeus stylirostris
(Boone, 1931)
L.C. Méndez, I.S Racotta, B. Acosta, G.
Portillo-Clark-2004
Aquaculture
Research, 35(7):
652
Abstract:
The sediments from four areas that are
used or will be used for shrimp culture were evaluated for their effect on
post-larvae growth of Litopenaeus stylirostris. Texture, organic
matter, total, and bio-available fraction of phosphorus, manganese, iron,
zinc, copper, and cadmium of the sediments were measured. A positive
significant correlation was obtained between total and bio-available
concentrations of iron, cadmium, and manganese, but not for copper,
phosphorus, or zinc. Significant differences in final weight, survival
rates, and shrimp yield were obtained among treatments. The highest survival
rates were obtained with sediments that had the highest manganese levels.
This survival high rate was significantly correlated with total manganese
content of the sediment (r=0.92). The highest final weight were
obtained in treatments with sediments containing higher levels of
phosphorus, which was reinforced by a significant positive correlation
between final weight and total and bio-available phosphorus (r=0.94
and 0.95 respectively), while final weight seems adversely affected by high
concentrations of copper (r = -0.83)
in the sediment. Texture of the sediment influenced shrimp yield, with lower
values for sandy sediments relative to silty sediments.
(Centro de Investigaciones Biológicas del
Noroeste (CIBNOR), Mar Bermejo 195, Col. Playa Palo de Santa Rita, La Paz,
B.C.S. 23090, México. E-mail: lmendez@cibnor.mx)