Identificación de las especies: Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualaniensis e Illex argentinus (Ommastrephidae) a través de medidas morfológicas de sus picos

Autores/as

  • Xinjun Chen College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of the Shanghai Education Commission for Oceanic Fisheries Resources Exploitation - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources (Shanghai Ocean University), Ministry of Education
  • Huajie Lu College of Marine Sciences, Shanghai Ocean University
  • Bilin Liu College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of the Shanghai Education Commission for Oceanic Fisheries Resources Exploitation - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources (Shanghai Ocean University), Ministry of Education
  • Yong Chen School of Marine Sciences, University of Maine - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources (Shanghai Ocean University), Ministry of Education
  • Siliang Li College of Marine Sciences, Shanghai Ocean University
  • Ma Jin College of Marine Sciences, Shanghai Ocean University

DOI:

https://doi.org/10.3989/scimar.03408.05B

Palabras clave:

medidas morfológicas de los picos, clasificación de especies, Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualaniensis, Illex argentinus

Resumen


Las cuatro especies de calamares: Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualaniensis e Illex argentinus, sometidas a una importante presión pesquera, juegan un papel significativo dentro de los ecosistemas marinos a los que pertenecen. Al ser los picos de estas especies resistentes, las medidas de diversos aspectos de su morfología pueden servir para identificarlas en análisis de contenidos estomacales de sus depredadores. Ello permite obtener una información crucial sobre la dinámica trófica de los ecosistemas. En el presente estudio, las medidas realizadas en los picos superior e inferior de los Ommastrephidae se han normalizado mediante un modelo de crecimiento alométrico, para evitar la influencia del efecto tamaño de los individuos. A continuación, mediante un análisis discriminante, se han estudiado las diferencias morfológicas entre las cuatro especies, así como entre machos y hembras. Las medidas que presentaban mayores variaciones eran la anchura y longitud del rostro superior. Mediante funciones discriminantes lineales de las medidas morfológicas normalizadas de sus picos, se han conseguido clasificar las cuatro especies de Ommastraphidae, con una fiabilidad superior al 97%. Asimismo, a través de sus medidas morfológicas, se ha encontrado un claro dimorfismo sexual en los picos de O. bartramii e I. argentinus. El presente estudio sugiere que las medidas morfológicas pueden ser útiles para clasificar correctamente los Ommastrephidae a nivel de género, y puede permitir identificar la especie en contenidos estomacales de depredadores de cefalópodos, lo cual mejorará el conocimiento del papel de los cefalópodos en los ecosistemas marinos en los que se integran.

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Publicado

2012-09-30

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1.
Chen X, Lu H, Liu B, Chen Y, Li S, Jin M. Identificación de las especies: Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualaniensis e Illex argentinus (Ommastrephidae) a través de medidas morfológicas de sus picos. Sci. mar. [Internet]. 30 de septiembre de 2012 [citado 11 de mayo de 2024];76(3):473-81. Disponible en: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1357

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