Gross morphology and surface ultrastructure of the gills of Odontesthes argentinensis (Actinopterygii, Atherinopsidae) from a Southwestern Atlantic coastal lagoon

Odontesthes argentinensis was collected from Mar Chiquita Coastal Lagoon, the Southernmost coastal Atlantic Lagoon of Argentina. The morphology of the gills was analyzed by scanning electron microscopy. The morphology of the superficial structures of the gill filaments and pharyngeal region of the g...

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Detalles Bibliográficos
Autores principales: Díaz, A.O., Castro, M.G., García, A.M., Díaz de Astarloa, J.M., Figueroa, D.E.
Formato: JOUR
Lenguaje:English
Materias:
Fishes
Gills
Morphology
Odontesthes argentinensis
SEM
animal anatomy
Argentina
article
coastal waters
controlled study
functional morphology
gill
gustatory system
nonhuman
osmoregulation
pharynx
respiratory epithelium
scanning electron microscopy
taste bud
teleost
ultrastructure
Adaptation, Physiological
Animals
Female
Male
Microscopy, Electron, Scanning
Mucous Membrane
Pharynx
Pulmonary Gas Exchange
Respiratory Mucosa
Respiratory Physiological Phenomena
Species Specificity
Taste Buds
Water-Electrolyte Balance
Actinopterygii
Atherinopsidae
Pisces
Teleostei
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00408166_v41_n3_p193_Diaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Odontesthes argentinensis was collected from Mar Chiquita Coastal Lagoon, the Southernmost coastal Atlantic Lagoon of Argentina. The morphology of the gills was analyzed by scanning electron microscopy. The morphology of the superficial structures of the gill filaments and pharyngeal region of the gill arch was discussed and related to their functional aspects. The gills arches are structurally similar to those of other teleosts and bring out the osmoregulatory capacity of this species. The epithelium that covers the surface of the filaments and the pharyngeal region of the gill arch is formed by polygonal pavement cells with conspicuous microridges. These folds in the membrane are not denoted in the epithelium of the respiratory lamellae. Apical crypts of chloride cells are present on the afferent and interlamellar filament surfaces, but are absent elsewhere on the gill arch. The highest density of mucous cells is observed into the gill filament and the pharyngeal region which indicates the existence of a protective strategy of the respiratory lamellae and the pharynx. The epithelium of the gill arches and the rakers is studded with spines. There are taste buds along the whole pharyngeal region that may be associated with their participation in tasting at this zone. © 2008 Elsevier Ltd. All rights reserved.

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