Seasonal Occurrence of Helminths in Freshwater Fishes

摘要: Publisher Summary This chapter discusses the life cycles and seasonal occurrence of larval cestodes nematodes. The all nematodes are complex, mostly require three hosts, an invertebrate first intermediate host, fish second a suitable definitive which, according to parasite species, can be fish, amphibian, bird, or mammal. Many stages in fishes economic importance, for example, Triaenophorus crassus , Diphyllobothrium dendriticum Ligula intestinalis Digramma interrupta Eustrongylides present public health problem if eaten by man uncooked instance, latum . Studies on helminths lakes reservoirs with thermal pollution from power stations have shown that heated areas there were increases abundance L. speeding up reproductive processes. There is unfortunate scarcity information about variations freshwater tropical regions world.