![]() Eleven (78.6% out of 14 fish were infected, with a mean intensity (range of 14.4 (1-55 worms. (Nematoda, Anisakidae is described from the intestine of Cauque mauleanum ( Steindachner ( Pisces: Atherinidae from Lake Panguipulli (39Â✤3'S 72Â✡3'W, Chile. On a New Species of Hysterothylacium (Nematoda: Anisakidae from Cauque mauleanum ( Pisces: Atherinidae by Brightfield and Scanning Electron Microscopyįull Text Available Hysterothylacium geschei n. This species probably selects the food to be swallowed through its chemical receptors and retains it with the help of spines and mucous secretion this way protecting the gills filaments against the rubbing of particles over them. This fish seems not to be a filtering one according to: its short and simple gill rakers presence of several taste buds turned towards the mouth opening evidence of spines on the external side of the arches and an abundant secretion of mucous in the pharyngeal region. The chloride cells are abundant, specially on the distal portion of the primary lamellae, and bring out the osmo regulatory capacity of this species. A great quantity of mucous secretory cells and of microridges, along with the pavement cell surface of the primary lamellae and branchial pharyngeal region, indicate the existence of a protection strategy of the respiratory lamellae. The morphology of the superficial structures of the gill filaments and pharyngeal region of the gills arches was discussed and related to their functional aspects. Ultrastructure (SEM of the gills of Prochilodus Scrofa Steindachner ( Pisces, Teleosteiĭirectory of Open Access Journals (Sweden)įull Text Available Gills arches of the freshwater fish Prochilodus scrofa Steindachner, 1881 (Lt= 8.0-12.4cm were removed to be analyzed in a scanning electron microscope.
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