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dc.contributor.author
Araya, Patricia R.
dc.contributor.author
Agostinho, Angelo A.
dc.contributor.author
Bechara, Jose Alfredo
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dc.date.available
2018-06-04T21:23:25Z
dc.date.issued
2005-08
dc.identifier.citation
Araya, Patricia R.; Agostinho, Angelo A.; Bechara, Jose Alfredo; The influence of dam construction on a population of Leporinus obtusidens (Valenciennes, 1847) (Pisces, Anostomidae) in the Yacyretá Reservoir (Argentina); Elsevier Science; Fisheries Research; 74; 1-3; 8-2005; 198-209
dc.identifier.issn
0165-7836
dc.identifier.uri
http://hdl.handle.net/11336/47261
dc.description.abstract
A field study of age, growth and mortality of the “boga”, Leporinus obtusidens (Valenciennes, 1847) was carried out in the Yacyretá Reservoir, High Paraná River, Argentina. We compared age-structure, length–weight relationships and condition factor coefficients in phases previous (1990–1994) and subsequent (1995–1998) to the reservoir filling. In addition, we estimated total and natural mortality, as well as the growth and yield parameters for the whole study period. Comparisons were carried out in four sampling points within the river main channel. Fish were sampled monthly with nine gillnets ranging from 40 to 160 mm of total mesh opening (opposed knots). A scale study showed an age range comprised between 1 and 13 years, with ages 4 and 5 the most abundant before reservoir filling, whereas ages 2 and 3 were more frequent afterward. The weight–standard length relationship showed a higher growth during the second phase of reservoir filling. Maximum condition factor was registered before the spawning period (August and September), being higher after the impoundment, and particularly in the sampling site located within the reservoir. The von Bertalanffy growth coefficient, K, reached 0.12 in both sexes, while the asymptotic length, L∞, was 578 and 547 mm, in females and males, respectively. Natural mortality according to Pauly's equation reached 0.178 year−1, and the total mortality was 0.36 year−1. The Beverton and Holt yield per recruitment (Y/R) was estimated as 246.54 g, with a maximum sustainable yield of 248.00 g. This result suggests that the species had higher condition after impoundment and is fished near its maximum capacity in the reservoir.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.subject.classification
Agricultura
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dc.subject.classification
Agricultura, Silvicultura y Pesca
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
The influence of dam construction on a population of Leporinus obtusidens (Valenciennes, 1847) (Pisces, Anostomidae) in the Yacyretá Reservoir (Argentina)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-05-21T16:56:46Z
dc.journal.volume
74
dc.journal.number
1-3
dc.journal.pagination
198-209
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Araya, Patricia R.. Universidad Nacional de Misiones; Argentina
dc.description.fil
Fil: Agostinho, Angelo A.. Universidade Estadual de Maringá; Brasil
dc.description.fil
Fil: Bechara, Jose Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias. Instituto de Ictiología del Nordeste; Argentina
dc.journal.title
Fisheries Research
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.fishres.2005.02.007
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0165783605000640
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