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Population structure and somatic indexes of Hypostomus cf. ancistroides (Siluriformes, Loricariidae) collected from the Bonito river, Ivaí river basin, Turvo, Paraná BABT
Viana,Douglas; Wollf,Luciano Lazzarini; Zaleski,Tânia; Romão,Silvia; Bertoldi,Gustavo; Donatti,Lucélia.
This study aimed to provide information about the population structure and somatic index of Hypostomus cf. ancistroides collected from the Bonito river, located in the Ivaí river basin. The length-weight relationship was isometric for both the sexes. The length structure analysis showed that the larger individuals (from 18.1cm to 27.0cm in length) predominated, and the lowest abundances occurred at the size extremes (9.1-12cm and 27.1-30.0cm). The reproduction period occured between October and January for the females and between November and January for the males. The liver somatic index cannot be used as an indicator of the reproduction period in either of the sexes, due to no correlation between the liver somatic index and the gonad somatic index. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gonad somatic index; Liver somatic index.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300008
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Blood parameter analysis and morphological alterations as biomarkers on the health of Hoplias malabaricus and Geophagus brasiliensis BABT
Romão,Silvia; Donatti,Lucélia; Freitas,Matheus O.; Teixeira,Josiane; Kusma,Josiana.
This study aimed to assess the influence of the environment on fish health. Samples of Hoplias malabaricus and Geophagus brasiliensis, were collected from three different environments: area I was urban and areas II and III were rural. Analyses of red blood cell count, microhematocrit, hemoglobin concentration, white blood cell count and differential white cell count in blood smear were carried out. Mean corpuscular volume and mean corpuscular hemoglobin concentration were calculated. To analyze morphological alterations, gills, liver, kidney and gonads were submitted to routine histological processing. Individuals collected from area III had slightly lower blood indices than collected from area I . Severe kidney changes, degeneration of and crystallization...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Bioindicators; Biomarkers; Morphological alterations; Hematology.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400012
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