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dc.contributor.author
Lattuca, María Eugenia
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dc.contributor.author
Lozano, Ismael Esteban
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dc.contributor.author
Brown, Daniel Roberto
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dc.contributor.author
Renzi, M.
dc.contributor.author
Luizon, Carlos Adrián
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dc.date.available
2016-04-28T20:19:49Z
dc.date.issued
2015-03
dc.identifier.citation
Lattuca, María Eugenia; Lozano, Ismael Esteban; Brown, Daniel Roberto; Renzi, M.; Luizon, Carlos Adrián; Natural growth, otolith shape and diet analyses of Odontesthes nigricans Richardson (Atherinopsidae) from southern Patagonia; Elsevier; Estuarine, Coastal and Shelf Science; 166; Part A; 3-2015; 105-114
dc.identifier.issn
0272-7714
dc.identifier.uri
http://hdl.handle.net/11336/5441
dc.description.abstract
Age and growth, otolith shape and diet of Odontesthes nigricans were analysed in order to provide an insight into the life history of the species and furthermore, to assess their possible use as a tool for discriminating silverside populations from the South Atlantic Ocean (Punta María) and Beagle Channel waters (Varela Bay). The age and growth analysis was performed by counting daily increments and annual marks in sagittae otoliths. Length-at-age data of individuals <65 mm standard length (SL) were fitted to the Laird–Gompertz model (SLt = 6.22 exp 2.45 [1−exp (−0.02t)]), which provided an excellent description of the pattern of daily growth for O. nigricans juveniles from Varela Bay. The spawning period was also assessed through back-calculation of hatching dates and it extended from November to February. The count of annual marks in larger individuals identified 7 year classes (0+ to 6+) in Varela Bay and 6 year classes (0+ to 5+) in Punta María. The von Bertalanffy growth model explained more than 95% of the growth patterns observed in O. nigricans from Varela Bay (SLt = 245.49 [1 − exp −0.24(t+0.46)]) and Punta María (SLt = 345.09 [1 − exp −0.15(t+0.31)]). Particularly, k and SL∞ varied significantly between sampling sites; reaching Punta María a larger SL∞ value with a lower k. Otolith shape variation was also explored using elliptical Fourier analysis and it showed significant differences between Varela Bay and Punta María populations. Furthermore, gut content analysis characterized O. nigricans as an invertebrate predator, being benthic organisms the most important components of its diet, which also showed significant site dependence. The use of all these analyses contributed to a holistic approach which maximized the likelihood of correctly identifying both O. nigricans populations in the southernmost limit of the species distribution.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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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
Odontesthes Nigricans
dc.subject
Age Determination
dc.subject
Otoliths
dc.subject
Feeding
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.title
Natural growth, otolith shape and diet analyses of Odontesthes nigricans Richardson (Atherinopsidae) from southern Patagonia
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-05-06 15:52:43.262787-03
dc.journal.volume
166
dc.journal.number
Part A
dc.journal.pagination
105-114
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Lattuca, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Tecnológica Nacional. Facultad Regional Río Grande; Argentina
dc.description.fil
Fil: Lozano, Ismael Esteban. Ministerio de Agricultura, Ganaderia, Pesca y Alimento; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Brown, Daniel Roberto. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
dc.description.fil
Fil: Renzi, M.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
dc.description.fil
Fil: Luizon, Carlos Adrián. Universidad Tecnológica Nacional. Facultad Regional Río Grande; Argentina
dc.journal.title
Estuarine, Coastal and Shelf Science
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0272771415000979
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.ecss.2015.03.019
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