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Biometric Relationships between Otolith and Fish Size of the Main Demersal Resources of North Patagonia, Argentina

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Abstract—

Allometric power equations are generated using otolith length and width in order to estimate the total length of five demersal species inhabiting the San Matias Gulf, the second largest gulf in Argentina. The selected fish species are economically important resources in Argentina and have been identified as prey for the system’s main predators. A total of 2795 specimens were sampled, and data were fitted using the nonlinear least squares analysis. It is shown that the length and width of the otolith are good predictors of the total fish length. A slightly better regression fit is observed when otolith length was considered as a predictor. Statistically significant morphometric differences in regression models were observed between sexes, except for Acanthistius patachonicus. Results are discussed and compared with those reported by other authors.

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ACKNOWLEDGMENTS

We acknowledge to the people who collaborated in obtaining and processing the samples. This study was carried out thanks to the logistical support of the Escuela Superior de Ciencias Marinas of the Universidad Nacional del Comahue.

Funding

This work was supported by the projects “Elaboración y ejecución de programas para definiciones de planes de manejo de recursos de la pesca en la Plataforma Continental Argentina” STAN CONICET (ST 2872), PICT-2014-1671 and PICT-2015-0534. MAR, NSR and RAG are supported by CONICET.

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Authors and Affiliations

  1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, 2290 (C1425FQB) CABA, ), Godoy Cruz, Argentina

    M. A. Romero, N. S. Ruiz & R. A. González

  2. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos “Almirante Storni” (CIMAS), Rio Negro, Güemes 1030 (8520) San Antonio Oeste, Argentina

    M. A. Romero & R. A. González

  3. Escuela Superior de Ciencias Marinas (ESCiMar), Universidad Nacional del Comahue, Rio Negro, San Martín 247 (8520) San Antonio Oeste, Argentina

    M. A. Romero, A. I. Medina & R. A. González

  4. Instituto de Desarrollo Costero “Dr. H.C. Héctor E. Zaixso” (IDC), Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Chubut, Ruta no. 1 s/n (9000) Comodoro Rivadavia, Argentina

    N. S. Ruiz

Authors
  1. M. A. Romero
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  2. N. S. Ruiz
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  3. A. I. Medina
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  4. R. A. González
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Corresponding author

Correspondence to M. A. Romero.

Ethics declarations

Conflict of interest. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Statement of the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Romero, M.A., Ruiz, N.S., Medina, A.I. et al. Biometric Relationships between Otolith and Fish Size of the Main Demersal Resources of North Patagonia, Argentina. J. Ichthyol. 60, 411–421 (2020). https://doi.org/10.1134/S0032945220030157

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  • DOI: https://doi.org/10.1134/S0032945220030157

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