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| Format: | Artículo científico |
| Language: | en |
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Universidad de Córdoba
2016
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| Online Access: | https://www.redalyc.org/articulo.oa?id=69343172012 https://www.redalyc.org/journal/693/69343172012/ https://www.redalyc.org/journal/693/69343172012/html/ https://www.redalyc.org/journal/693/69343172012/69343172012.epub https://www.redalyc.org/journal/693/69343172012/movil |
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| _version_ | 1866815645505552384 |
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| author | Hernando Ramírez-Gil |
| author_facet | Hernando Ramírez-Gil |
| contents | Spatial and temporal length distribution of Zungaro zungaro caught in the Orinoco River Basin of Colombia Hernando Ramírez-Gil Veterinaria Overfishing river fisheries population dynamics sexual selection (Source: ASFA) Objetive. To determine the effect of fishing on capture size of both male and female Zungaro zungaro catfish, historical records of size and spatial distribution of the species were analyzed from the Orinoco Basin in Colombian. Materials and methods. Information was collected by sampling fishing port landings in the region between 1979 and 2011. Each specimen was measured, weighed and sexed. With 5411 records, the average size at capture were compared in time and among the different ports. Size at 50% maturity was estimated by quinquennium. Results. The average commercial capture sizes of Z. zungaro ranged from 35 to 161 cm standard length, with differences between males and females. From 1979 to 2011, in Puerto Lopez, the size at sexual maturity decreased from 123.8 to 83.4 cm in females and from 93.3 to 61 in males. In the annual cycle the greater average capture size in females was from April to July and for males from May to June. Average annual length is higher in the higher parts of the Meta and Guaviare river drainages. In the last quinquennium the size at 50% maturity had fallen 10 cm in females and 5 cm in males and it is higher than the average capture size. Conclusions. Populations of Z. zungaro in the Colombian Orinoco River Basin have been affected by overfishing and selective fishing of females. 2016 artículo científico 0122-0268 https://www.redalyc.org/articulo.oa?id=69343172012 https://www.redalyc.org/journal/693/69343172012/ https://www.redalyc.org/journal/693/69343172012/html/ https://www.redalyc.org/journal/693/69343172012/69343172012.epub https://www.redalyc.org/journal/693/69343172012/movil en http://www.redalyc.org/revista.oa?id=693 Revista MVZ Córdoba application/pdf Universidad de Córdoba Revista MVZ Córdoba (Colombia) Num.1 Vol.21 |
| format | Artículo científico |
| id | redalyc_69343172012 |
| language | en |
| publishDate | 2016 |
| publisher | Universidad de Córdoba |
| spellingShingle | Spatial and temporal length distribution of Zungaro zungaro caught in the Orinoco River Basin of Colombia Hernando Ramírez-Gil Veterinaria Overfishing river fisheries population dynamics sexual selection (Source: ASFA) Spatial and temporal length distribution of Zungaro zungaro caught in the Orinoco River Basin of Colombia Hernando Ramírez-Gil Veterinaria Overfishing river fisheries population dynamics sexual selection (Source: ASFA) Objetive. To determine the effect of fishing on capture size of both male and female Zungaro zungaro catfish, historical records of size and spatial distribution of the species were analyzed from the Orinoco Basin in Colombian. Materials and methods. Information was collected by sampling fishing port landings in the region between 1979 and 2011. Each specimen was measured, weighed and sexed. With 5411 records, the average size at capture were compared in time and among the different ports. Size at 50% maturity was estimated by quinquennium. Results. The average commercial capture sizes of Z. zungaro ranged from 35 to 161 cm standard length, with differences between males and females. From 1979 to 2011, in Puerto Lopez, the size at sexual maturity decreased from 123.8 to 83.4 cm in females and from 93.3 to 61 in males. In the annual cycle the greater average capture size in females was from April to July and for males from May to June. Average annual length is higher in the higher parts of the Meta and Guaviare river drainages. In the last quinquennium the size at 50% maturity had fallen 10 cm in females and 5 cm in males and it is higher than the average capture size. Conclusions. Populations of Z. zungaro in the Colombian Orinoco River Basin have been affected by overfishing and selective fishing of females. 2016 artículo científico 0122-0268 https://www.redalyc.org/articulo.oa?id=69343172012 https://www.redalyc.org/journal/693/69343172012/ https://www.redalyc.org/journal/693/69343172012/html/ https://www.redalyc.org/journal/693/69343172012/69343172012.epub https://www.redalyc.org/journal/693/69343172012/movil en http://www.redalyc.org/revista.oa?id=693 Revista MVZ Córdoba application/pdf Universidad de Córdoba Revista MVZ Córdoba (Colombia) Num.1 Vol.21 |
| title | Spatial and temporal length distribution of Zungaro zungaro caught in the Orinoco River Basin of Colombia |
| topic | Veterinaria Overfishing river fisheries population dynamics sexual selection (Source: ASFA) |
| url | https://www.redalyc.org/articulo.oa?id=69343172012 https://www.redalyc.org/journal/693/69343172012/ https://www.redalyc.org/journal/693/69343172012/html/ https://www.redalyc.org/journal/693/69343172012/69343172012.epub https://www.redalyc.org/journal/693/69343172012/movil |