Dentex maroccanus Valenciennes, 1830 Otolith Morphology, Age, and Growth in the Aegean Sea (E. Mediterranean)

Autor(en)

Aglaia Legaki, Isabella Leonhard, Chryssi Mytilineou, Aikaterini Anastasopoulou

Abstrakt

Otoliths are important structures for balance and hearing of fish and constitute a useful
tool in fisheries science. This study provides, for the first time in the Mediterranean, information on
the otolith morphometrics of Dentex maroccanus, collected from the South Aegean Sea, and enriches
the existing information on its age and growth by sex. The otolith shape variables examined showed
a more circular to square otolith shape, related to the body size. Significant differences between
sexes were detected for the otolith Area, Diameter, Perimeter, and Radius. Exponential regressions
were used to examine the relationship of the otolith variables with total body length, from which
five showed a strong correlation (Diameter, Width, Radius, Area, and Perimeter). The eviscerated
weight–length relationship exhibited an isometric growth for both sexes, whereas when total weight
was applied, a positive allometric growth was found for females. Sagittal otolith readings revealed
four age groups for females and five for males. A Bhattacharya method was used for age validation.
Von Bertalanffy growth parameters were as follows: L∞ = 23.08, k = 0.27, t0 = −1.93 for females and
L∞ = 24.07, k = 0.24, t0 = −2.26 for males. This research offers valuable biological information for
Dentex maroccanus useful in fisheries science.

Organisation(en)

Institut für Paläontologie

Journal

Animals

ISSN

2076-2615

Publikationsdatum

11-2024

Peer-reviewed

Ja

ÖFOS 2012

106001 Allgemeine Biologie

Schlagwörter

Sustainable Development Goals

SDG 14 – Leben unter Wasser

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/c22f38f7-0a7e-4902-a565-03865a99d3d8