Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Relationship between Fish Length and Otolith Morphological Characteristics of Sargocentron spiniferum (Forsskål, 1775) from the Southern Red Sea

Version 1 : Received: 2 April 2021 / Approved: 5 April 2021 / Online: 5 April 2021 (10:26:13 CEST)

How to cite: Osman, Y.A.A.; Mahé, K.; El-Mahdy, S.M.; Mohammad, A.S.; Mehanna, S. Relationship between Fish Length and Otolith Morphological Characteristics of Sargocentron spiniferum (Forsskål, 1775) from the Southern Red Sea. Preprints 2021, 2021040092 (doi: 10.20944/preprints202104.0092.v1). Osman, Y.A.A.; Mahé, K.; El-Mahdy, S.M.; Mohammad, A.S.; Mehanna, S. Relationship between Fish Length and Otolith Morphological Characteristics of Sargocentron spiniferum (Forsskål, 1775) from the Southern Red Sea. Preprints 2021, 2021040092 (doi: 10.20944/preprints202104.0092.v1).

Abstract

Otolith morphology analysis is one of the main tools used for fish or fish stock identification. Moreover, otolith shape can also be used in fish dietary studies (stomach content) for the identification of prey fishes and their size according to the relationship between fish and otolith sizes. In the present study, the relationship between fish length and otolith morphological dimensions was investigated for the sabre squirrelfish, Sargocentron spiniferum (Forsskål, 1775) (family: Holocentridae). Samples of 185 fish were collected from the coast of the Red Sea, Egypt. To analyze the relationship between fish and otolith, otolith morphometric measurements (length, width, area, perimeter, weight, sulcus, and ostium) and shape factors (aspect ratio, compactness, form factor, rectangularity, roundness, ellipticity, squareness) describing outline shape were extracted using image analysis. Generalized linear models were applied for the relationship between body length and each otolith morphology feature. From the relationships between the total length of fish and fourteen morphology features, only otolith length, caudal length, and squareness were significantly correlated with fish size. Our results provide more information for the relationship between fish length and otolith morphometric features.

Keywords

Fish size; otolith shape; head side; Sargocentron spiniferum; Red Sea; Egypt

Subject

BIOLOGY, Anatomy & Morphology

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