Effect of Cadmium (Cd) on The Structure of Gill and Epipodite of Penaeid Shrimp, Penaeus japonicus Bate (Crustacea, Decapoda)

Abstrak

Efek toksisitas sublethal cadmium terhadap struktur insang dan epipodite dari udang Penaeus japonicus dipelajari. Setelah pemaparan selama 4 hari, kadmium merubah struktur insang dari udang, akumulasi hemocyte dalam vena dan Iamela, epithelium insang mengalami disorganisasi dan kanal hemolympha distal menjadi buntu. Struktur dari epipodite juga terganggu: cadmium menyebabkan nekrosis pada permukaan. Kerusakan struktur insang dan epipodit ini menjadi argumen penurunan kapasitas hypo- dan hyper-osmoregulasi udang ini. Kata kuncl: kadmium, struktur, Penaeus japonicus, insang, epipodite. The effect of sublethal toxicity of cadmium on the structure of gill and epipodtte of the shrimp Penaeus japonicus was studied. After 4 days of exposure, cadmium affected the gill structure of shrimp: hemocyte accumulate in vessels/channelsand lamellas, the gill epithelium is disorganised and the distal hemolymphatic lacuna is clogged. The structure of epipodites is also altered: cadmium causes superficial necrosis. The damage of gill and epipodite structure becomes a reason on the decrease of hypo- and hyper­ osmoregulatory capacity in this shrimp.Keywords: cadmium, structure, Penaeus Iepontcus. gill, epipodite.