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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Black Spot Disease (fluke disease) ： ウィキペディア英語版 Black Spot Disease (fluke disease) Black Spot Disease is also known as diplopstomiasis or fluke disease. It is a freshwater fish disease caused by flatworm larvae of the species Neascus.〔〔(【引用サイトリンク】title=Fish diseases: Neascus (Black spot disease): Minnesota DNR )〕 It appears as tiny black spots on the skin, fins and flesh of the fish. The life cycle of the parasite typically involves a fish-eating bird, a snail and a fish. The black spot larvae grow to sexual maturity in the infected bird's intestine. The adult worms pass eggs with the bird's droppings. When the eggs reach water, they hatch into free-swimming organisms which then penetrate snails for further development. Finally, after leaving the snails they burrow into the skin of fish and form a cyst. The fish surrounds the cyst with black pigment that gives the disease its name. If an infected fish is consumed by a bird, the cycle repeats itself.〔(【引用サイトリンク】title=DNR: Fish Parasites & Diseases )〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Black Spot Disease (fluke disease)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.