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Fecundidade e tipo de desova do tamuatá, Hoplosternum littorale Hancock (Osteichthyes, Siluriformes) no Rio Curiaú, Macapá, Amapá Zoologia
Sá-Oliveira,Júlio César; Chellappa,Sathyabama.
During June 1999 to June 2000 one hundred and forty seven females of Hoplosternum littorale Hancock, 1828 were collected from the Curiaú River, Macapá, Amapá, Brazil. The objective of this study was to determine the fecundity and the type of spawning of H. littorale. Analysis of the percentage distribution of the oocyte diameter softh e females, in five different stages of gonadal development, showed that this species is a total spawner. There were two different size graups of oocytes with synchranic development. The total fecundity varied from 9, 144 to 31, 698 mature oocytes.The fecundity, when related to total length and weight, showed that it increases with the enhance in total length and weight.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Osteichthyes; Siluriformes; Hoplosternum littorale; Fecundity; Typeof spawning.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000400009
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Ultraestrutura da espermatogênese do tamoatá, Hoplosternum littorale (Hancock) (Teleostei, Callichthyidae) do rio Amazonas Zoologia
Matos,E; Matos,P; Oliveira,E; Azevedo,C.
Sequential cytological modifications of Hoplosternum littorale (Hancock) spermatogenesis were studied with electron microscopy from the spermatocyte to the mature spermatozoon. Five stages of spermatical maturation were described. The spermatozoon is one of the primitive tupe, with head without acrosome and a tail with a type pattern.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Teleostei; Callichthyidae; Hoplosternum littorale.
Ano: 1993 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000200004
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DISTRIBUTION AND FEEDING ECOLOGY OF THE AFRICAN TILAPIA Oreochromis mossambicus (TELEOSTEI, PERCIFORMES, CICHLIDAE) IN SURINAME (SOUTH AMERICA) WITH COMMENTS ON THE TILAPIA-KWIKWI (Hoplosternum littorale) (TELEOSTEI, SILURIFORMEs, CALLICHTHYIDAE) INTERACTION Acta Amazonica
Η. ΜΟL,Jan; VAN DER LUGT,Frank L..
The geographical distribution of the African Tilapia Oreochromis mossambicusin Suriname is restricted to a narrow strip of land along the Atlantic coast. Within the coastal plain, O. mossambicusoccurs in brackish lagoons, oligohaline canals, and shell-sand pit lakes. Physico-chemical characteristics and phytoplankton composition of representative Tilapia water bodies are described. Blue-green algae and fine flocculent detritus are dominant food items in the diet of the Tilapia, while Rotifera and microcrustacea are also important in the diet of larvae and juveniles. Intraspecific diet overlap among ontogenetic stages of the Tilapia did not differ significantly from 1, which means that these diets showed complete overlap. Interspecific diet overlap between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oreochromis mossambicus; Hoplosternum littorale; Distribution; Diet overlap; Competition; Suriname.
Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671995000200101
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