Population structure of Phalloceros caudimaculatus (Hensel, 1868) (Cyprinodontiformes, Poeciliidae) collected in a brook in Guarapuava, PR
Document title: Population structure of Phalloceros caudimaculatus (Hensel, 1868) (Cyprinodontiformes, Poeciliidae) collected in a brook in Guarapuava, PR
Journal: Brazilian archives of biology and technology
Database: PERIÓDICA
System number: 000346662
ISSN: 1516-8913
Authors: 1
1
1
2
1
Institutions: 1Universidade Federal do Parana, Departamento de Biologia Celular, Curitiba, Parana. Brasil
2Faculdade de Ciencias Biomedicas de Cacoal, Cacoal, Rondonia. Brasil
Year:
Season: May
Volumen: 50
Number: 3
Pages: 417-423
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The population structure of Phalloceros caudimaculatus was studied in a brook (sites A and B) existing in the CEDETEG - Guarapuava/PR. Fourteen length classes of 3 mm amplitude were defined for P. caudimaculatus. The widest length amplitude and the average and maximum sizes were observed in females. Females were significantly more predominant in the whole sample and more frequent in all length classes. The sexual proportion data, showed that the number of females was superior to that of males throughout most of the year. Young occurrence peaks were registered in November and March. Pregnant females were present from March to April, from July to August and in January, characterizing the reproductive season. At sampling site A, a higher occurrence of pregnant females and young was observed
Portuguese abstract A estrutura populacional de Phalloceros caudimaculatus foi estudada em um riacho (pontos A e B) existente no CEDETEG - Guarapuava/PR. Para P. caudimaculatus foram encontradas 14 classes de comprimento com amplitude de 3,0mm. A maior amplitude de comprimento e os maiores tamanhos médios e máximos foram observados nas fêmeas. As fêmeas foram significativamente predominantes na amostra total e mais abundantes em todas as classes de comprimento. Pela proporção sexual pode-se detectar que o número de fêmeas é superior ao de machos a maior parte do ano. Os picos de ocorrência de jovens foram registrados nos meses de novembro e março. As fêmeas grávidas estiveram presentes nos bimestres de março-abril, julho-agosto e no mês de janeiro, caracterizando a época reprodutiva. No ponto de coleta A foi observado uma maior ocorrência de fêmeas grávidas e de jovens
Disciplines: Biología
Keyword: Ecología,
Peces,
Peces de agua dulce,
Estructura de la población,
Distribución por talla,
Proporción sexual,
Phalloceros caudimaculatus,
Poeciliidae
Keyword: Biology,
Ecology,
Fish,
Freshwater fish,
Population structure,
Size distribution,
Sex ratio,
Phalloceros caudimaculatus,
Poeciliidae
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