Guillen JL, Endo M, Turnbull J, Kawatsu H, Richards R & Aoki T (1993) Depressed Growth Rate and Damage to the Cartilage of Red Sea Bream Larvae Associated with Exposure to Ammonia. Nippon Suisan Gakkaishi, 59 (7), pp. 1231-1234. https://doi.org/10.2331/suisan.59.1231
A depressed growth rate in the absence of pathological changes was observed in the larvae of a marine teleost, red sea bream Pagrus major, exposed to 0.002 and 0.02mg/l NH3-N (non-ionized ammonia) for 72 hours. Such levels of ammonia are frequently encountered in practical larval culture facilities in Japan and may have a detrimental effect on production. In a second experiment a histological study revealed that three-day-old larvae exposed to 0.05, 0.08, and 0.15mg/l NH3-N for 24 hours developed cytoplasmic vacuoles in the chondrocytes. The possible causes of such pathology and its relationship to the observed depression in the growth rate are discussed.
; Fish culture; Aquaculture
Nippon Suisan Gakkaishi: Volume 59, Issue 7