Morfologia e ultraestrutura de arcos branquiais de juvenis de Mugil platanus Günther (Pisces, Mugilidae)

Gill arch surface morphology and ultrastructure of juvenile Mugil platanus Günther (Pisces, Mugilidae)

Gill arch; Mugil platanus; morfology; surface ultrastructure

Morfologia e ultraestrutura de arcos branquiais de juvenis de Mugil platanus Günther (Pisces, Mugilidae)

Gill arch surface morphology and ultrastructure of juvenile Mugil platanus Günther (Pisces, Mugilidae)

José Claro da Fonseca Neto^I,II; Henry Louis Spach^I

^ICentro de Estudos do Mar, Universidade Federal do Paraná. Avenida Beira Mar, 83255-000 Pontal do Paraná, Paraná, Brasil

^IICurso de Pós-graduação em Zoologia, Departamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-990 Curitiba, Paraná, Brasil

ABSTRACT

Scanning electron microscopy revealed that the gill arch surface from juveniles of Mugil platanus Günther, 1880 is similar to that reported for others euryhaline teleosts. Two filament rows (about 41-49 filament per row) extend posteriorly, and two rows of rakers (about 42-46 rakers per row) extended anteriorly from each arch. Respiratory lamellae protrude along both sides of each filament (37/mm), from the base to the apex. The distribution, sizes and structure of various surface cells were also described. Except for the respiratory lamellae, the surface of whole gill arch is covered by a mosaic of pavement cells, which measure about 6,94X4,61µm and exhibit concentrically arranged surface ridges. The anterior pharyngeal surfaces of the raker of the first arch and the ventral part of the second, smooth secondary projections are present which are replaced by spiny secondary projections on the dorsal part of the second arch, and entire third and fourth arches. Taste buds are especially prominent between smooth projections. Apical ciypts of chloride cells oceur mostly at the afferent surface of the gill filament.

Key words: Gill arch, Mugil platanus, morfology, surface ultrastructure

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

AGRADECIMENTOS. Agradecemos a CAPES, ao Centro de Estudos do Mar, Universidade Federal do Paraná (UFPR), ao Curso de Pós-Graduação em Zoologia, UFPR, ao Centro de Microscopia Eletrônica, UFPR, ao do Laboratório de Microscopia Eletrônica do Instituto de Física, Universidade de São Paulo.

Recebido em 11.XII.1997; aceito em 12.IV.1999.

• Braga, F.M. de S. 1982. Variação no número de rastros branquiais entre espécies de Mugil Linnaeus (Mugilidae, Teleostei) do litoral brasileiro. Dusenia, Curitiba, 13 (2):81-911.
• Dunel-Erb, S. & P. Laurent. 1980. Ultrastructure of marine teleost gill epithelia: SEM and TEM study of the chloride cell apical membrane. Jour. Morphol., New York, 165:175-186.
• Franklin, C.E. 1990. Surface ultrastructural changes in the gills of sockeye salmon (Teleostei: Oncorhynchus nerka) during seawater ransfer. Comparation of sucessful and unsuccessful seawater adaptation. Jour. Morphol., New York, 206:13-23.
• Gray, I.E. 1954. Comparative study of the gill area of marine fishes. Biol. Bull., New York, 107:219-255.
• Hossler, F.E.; J.R. Ruby & T.D. McWiwain. 1979a. The gill arch of the mullet, Mugil cephalus. I. surface ultrastructure. Jour. Exp. Zool., New York, 208:379-398.
• ______. 1979b. The gill arch of the mullet, Mugil cephalus. II. Modification in surface ultrastructure and Na-K-ATPase content during adaptation to various salinities. Jour. Exp. Zool., New York, 208:399-406.
• Hossler, F.E. & L.H. Merchant. 1983. Morphology of taste buds on the gill archses of the mullet Mugil cephalus,and the Fundiam heteroclitus. Amer. Jour. Anat., New York, 166:299-312.
• Hughes, G.M. 1966. The dimension of the fish gills in relation to their function. Jour. Exp. Biol. 45:177-195.
• ______. 1979. Scanning electron microscopy of the respiratory surfaces of trout gills. Jour. Zool. 188:443-453.
• ______. 1984. General anatomy of the gills, p.1-72. In: W.S. Hoar & D.J. Randall (Eds). Fish Physiology. New York, Academic Press, Vol. 10A.
• Hughes, G.M.; S.F. Perry & Piiper. 1984. Quantitative anatomy of the gills of the larger spotted dog fish (Scyliorhinus stellavis). Jour. Exp. Biol. 98:277-288.
• Laurent, P. 1984. Gill internal morphology, p.73-183. In: W.S. Hoar & D.J. Randall (Eds) Fish Physiology. New York, Academic Press, Vol. 10A.
• Laurent, P. & S. Dunel. 1980. Morphology of gill epithelia in fish. Amer. Jour. Physiol. 238:174-159.
• Ojha, J.; A.K. Mishra & S.D. Munshi. 1987. Interspecific variations in the surface ultrastructure of gills of freshwater mullets. Japan. Jour. Ichthyol. 33 (4):388-393.
• Schimidt-Nielsen, K. 1990. Animal Physiology- adaptation and environment. Cambridge, Cambridge Univ. Press, 4^th ed., 602p.
• Snedecor, G.M. & W.G. Cochran. 1980. Statistical methods. Iowa State Univ. Press, Iowa, 7^th ed., 507p.
• Sperry, D.G. & R.J. Wassersug. 1977. A proposed function for microrridges on epithelial cells. Anat. Rec. 185:253-258.

Datas de Publicação

• Publicação nesta coleção
  01 Jul 2009
• Data do Fascículo
  Jun 1999

Histórico

• Recebido
  11 Dez 1997
• Aceito
  12 Abr 1999