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Crescimento de Schizodon Intermedius Garavello & Britski (Ostheichthyes, Anostomidae) do Rio Tibagi (Sertanópolis, Paraná)

1999; Sociedade Brasileira de Zoologia; Volume: 16; Issue: 3 Linguagem: Inglês

10.1590/s0101-81751999000300009

ISSN

1806-969X

Autores

Mário Luís Orsi, Oscar Akio Shibatta,

Tópico(s)

Fish Ecology and Management Studies

Resumo

Growth of Scllizotloll illlermetlillsGaravello & Britski (Ostheichthyes, Anostomidae) fmm Tibagi river (Sertanópolis, Paraná).This work eonsiS1S ofage, growth, and eireuli formalion period determinalion and lhe relalion of reproduclion, lemperalure, and pluviosity on lhe groWlh of S. inlermedills Garavello & Brilski, 1990.The groWlh curve was adjusled by lhe Be.1alanf)!'s expression and lhe relalionship belween weighl and size was made by lhe minimum square melhod lo delermine lhe condilioning faclor.Gonadossomatic index (IGS) was used lo sludy lhe reproduction.The assintolic values for lenglh were 33,94 cm and 44,81 em for males and females, respeclively.The circulus were formed annually and lhe growth was slow and lhe maximum age was delennined lo be nine years.The formation of lhe circuli was influenced by lhe reproduclion, probably allied to other abiotie /àetors like temperature and rain.

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