Weightlenght relationship and condition factor of Rhamdia hilarii Valenciennes, 1840 ( Osteichthyes, Siluriformes, Pimelodidae )

Authors

  • Massuka Yamane NARAHARA Pesquisador Cientí­­fico - Seção de Biologia Aquática-Divisão de Pesca Interior -  Instituto de Pesca
  • Heloisa Maria GODINHO Pesquisador Cientí­­fico - Seção de Biologia Aquática-Divisão de Pesca Interior -  Instituto de Pesca
  • Nelsy FENERICHVERANI Pesquisador Cientí­­fico - Seção de Biologia Aquática-Divisão de Pesca Interior -  Instituto de Pesca
  • Elizabeth ROMAGOSA Biologista - Seção de Biologia Aquática - Divisão de Pesca Interior - Instituto de Pesca http://orcid.org/0000-0001-5363-4128

Keywords:

NíO CONSTA

Abstract

The weight-length relationship of a sample of 1490 individuals of Rhamdia hilarii can be described by the following equations:

 

Males Wt = 0.0043 x Lt 3.2055

Females Wt = 0.0037 x Lt 3.2538

 

No significant difference between the sexes was indicated by "t" tests being the relation to be expressed by the equation:

Wt.= 0.0039 x Lt 3.2321. The condition factor (K e K1 ) was determined in relation to the months of the year and total length of individuals, considering females and males separately. The greater values were observed during the pre-spawning season. The decrease of K values coincides with the reproduction process.

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Published

2018-06-28

Issue

Vol. 12 No. 4 (1985): BOLETIM DO INSTITUTO DE PESCA

Section

Scientific Article

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