title: Cadmium toxicity to embryonic-larval development and survival in red sea bream Pagrus major.
abstract: At 18 degrees C and 33 psu, 24 and 48 h LC(50) values of cadmium (Cd) for red sea bream Pagrus major embryos were 9.8 and 6.6 mgl(-1), respectively, while 24, 48, 72, and 96 h LC(50) values for larvae were 18.9, 16.2, 8.0, and 5.6 mgl(-1), respectively, indicating that embryos were more sensitive to Cd toxicity than larvae. Cd concentrations at > or =0.8 mgl(-1) led to low hatchability (0-90% in > or =0.8 mgl(-1) solutions vs. 97-100% in lower ones), delay in time to hatch, high mortality (38-100% vs. 1-10%), morphological abnormality (42-100% vs. 1-10%), reduced length (3.55-3.60 vs. 3.71-3.72 mm) in the embryos and larvae. They were Cd concentration dependent and potential biological significant endpoints for assessing the risk of Cd to aquatic organisms. Heart beat and yolk absorption of the larvae were significantly inhibited at some high concentrations but they were not as sensitive as other endpoints to Cd exposure.
authors: Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, PR China.
authors: Liang
authors: L
authors: Cao
authors: Wei
authors: W
authors: Huang
authors: Xiujuan
authors: X
authors: Shan
authors: Zhizhong
authors: Z
authors: Xiao
authors: Qiyao
authors: Q
authors: Wang
authors: Shuozeng
authors: S
authors: Dou
mesh_terms: D000818:Animals; D019256:Cadmium Chloride / Q000633:toxicity*; D002681:China; D004625:Embryo, Nonmammalian / Q000187:drug effects*; D047108:Embryonic Development / Q000187:drug effects*; D004784:Environmental Monitoring; D005260:Female; D007928:Lethal Dose 50; D008297:Male; D021541:Sea Bream / Q000196:embryology / Q000254:growth & development*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D019256:Cadmium Chloride