Data/hora: 14/06/2024 17:51:15

Provedor de dados: | 104
País: | Brazil
Título: | Occurrence of Macrobrachium amazonicum (Heller) (Decapoda, Palaemonidae) in Leopoldo's inlet (Ressaco do Leopoldo), upper Paraná River, Porto Rico, Paraná, Brazil
Autores: | Bialetzki,Andréa; Nakatani,Keshiyu; Baumgartner,Gilmar; Bond-Buckup,Georgina.
Data: | 1997-01-01
Ano: | 1997
Palavras-chave: | Decapoda; Palaemonidae; Macrobrachium amazonicum; Temporal distribution; Nychthemeral variation; Paraná River.
Resumo: | Studies on the occurrence, temporal distribution and nychthemeral variation of Macrobrachium amazonicum (Heller, 1862) were undertaken in Leopoldo's Inlet, upper Paraná River, Porto Rico, Paraná, Brazil. Seventeen thousand and sixty specimens (11,786 larvae and 5,274 juveniles) were captured with a conicalcylindrical plankton net of mesh 0.5mm in monthly samples between February 1991 and February 1992. Results show that the greatest densities of larvae (301.83 larvae/10m³) and juveniles (168.8/10m³) of this species were caught in December 1991. Largest captures were made during the night. With regard to abiotic factors water temperature ranged from 20º to 30ºC, pH ranged from 5.66 to 7.37 and electric conductivity ranged from 51.83 to 65.33µS/cm. Relationship between the density of larvae and juveniles and abiotic factors was calculated by the Principal Components Analysis (PCA) which revealed the influence of some limnological variables especially on the distribution of larvae.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000200011
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S0101-81751997000200011
Formato: | text/html
Fonte: | Revista Brasileira de Zoologia  v.14 n.2 1997
Fonte: | info:eu-repo/semantics/openAccess