Results 31 to 40 of about 9,474 (259)

Directional bilateral asymmetry in otolith morphology may affect fish stock discrimination based on otolith shape analysis [PDF]

ICES Journal of Marine Science, 2018
AbstractOtolith shape analysis is an efficient fish stock identification tool. However, most applications used left and right otoliths or only one of them arbitrarily chosen without testing for biases resulting from potential directional bilateral asymmetry (DA) in otolith shape, i.e.
Mahé, Kélig, Ider, Djamila, Massaro, Andrea, Hamed, Oussama, Jurado-Ruzafa, Alba, Gonçalves, Patrícia, Anastasopoulou, Aikaterini, Jadaud, Angelique, Mytilineou, Chryssi, Elleboode, Romain, Ramdane, Zohir, Bacha, Mahmoud, Amara, Rachid, Pontual, Hélène, Ernande, Bruno   +14 more
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Otolith mineralogy affects otolith shape asymmetry: a comparison of hatchery and natural origin Coho salmon (Oncorhynchus kisutch)

Journal of Fish Biology, 2023
AbstractMany aspects of natural and hatchery origin salmonid genetics, physiology, behaviour, anatomy and life histories have been compared due to the concerns about what effects domestication and hatchery rearing conditions have on fitness. Genetic and environmental stressors associated with hatchery rearing could cause greater developmental ...
Micah J. Quindazzi, Leigh P. Gaffney, Emma Polard, Nick Bohlender, Will Duguid, Francis Juanes   +5 more
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Ontogenetic and sexual variation in the sagitta otolith of Menticirrhus americanus (Teleostei; Sciaenidae) (Linnaeus, 1758) in a subtropical environment [PDF]

Papéis Avulsos de Zoologia, 2020
This study aimed to verify variations in the form of the sagitta otolith of Menticirrhus americanus as to their ontogeny, sex and stage of such structure. Ontogenetically were found significant differences (p < 0.05) for all shape indices (aspect ratios,
Barbara Maichak de Carvalho, Alejandra Vanina Volpedo, Luís Fernando Fávaro   +2 more
doaj   +1 more source

Otolith shape lends support to the sensory drive hypothesis in rockfishes [PDF]

Journal of Evolutionary Biology, 2016
AbstractThe sensory drive hypothesis proposes that environmental factors affect both signalling dynamics and the evolution of signals and receivers. Sound detection and equilibrium in marine fishes are senses dependent on thesagittaeotoliths, whose morphological variability appears intrinsically linked to the environment.
Tuset, V. M., Otero Ferrer, J. L., Gómez Zurita, J., Venerus, Leonardo Ariel, Stransky, C., Imondi, R., Orlov, A. M., Ye, Z., Santschi, L., Afanasiev, P. K., Zhuang, L., Farré, M., Love, M.S., Lombarte, A.   +13 more
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Otolith Morphometric and Shape Distinction of Three Redfin Species under the Genus Decapterus (Teleostei: Carangidae) from Sulu Sea, Philippines

Fishes, 2023
Otoliths are paired calcified structures in the inner ear of teleosts that function in hearing and balance. In this study, the use of otolith morphometrics and shape analysis were explored to delineate the redfin species under the genus Decapterus from ...
Christian James C. Morales, Kyle Dominic E. Barnuevo, Emmanuel S. Delloro, Roxanne A. Cabebe-Barnuevo, Jenylle Kate S. Calizo, Sanny David P. Lumayno, Ricardo P. Babaran   +6 more
doaj   +1 more source

Shapes of otoliths in some Baltic fish and their proportions

Oceanological and Hydrobiological Studies, 2019
Abstract Otoliths are bony structures inside the fish labyrinth. They are used to determine the age of fish and to identify species based on their remains. The objective of this study was to describe the shape of otoliths in adult European perch (Perca fluviatilis), Atlantic herring (Clupea harengus), European sprat (Sprattus sprattus ...
Mariusz R. Sapota, Violetta Dąbrowska
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Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (Sparus aurata Linnaeus, 1758)

Fishes, 2022
Otolith morphological variability is used as a reliable indicator to discriminate fish that experience different environmental conditions during their lifetimes.
George Geladakis, Chara Kourkouta, Stylianos Somarakis, George Koumoundouros   +3 more
doaj   +1 more source

Ensembles of wrappers for automated feature selection in fish age classification [PDF]

, 2017
In feature selection, the most important features must be chosen so as to decrease the number thereof while retaining their discriminatory information. Within this context, a novel feature selection method based on an ensemble of wrappers is proposed and
Bermejo Sánchez, Sergi
core   +2 more sources

Otolith shape classification for fish stock discrimination

International Image Processing, Applications and Systems Conference, 2014
The shape analysis of otoliths, which are calcified structures in the inner ear of teleostean fishes, is known to be particularly relevant to address species identification and stock discrimination. Generally, scientists use classical methodologies of statistical analysis and shape recognition such as Fourier shape descriptors and Principal Component ...
Soria Pérez, José Antonio, Nasreddine, Kamal, Parisi Baradad, Vicenç, Ferrer Arnau, Luis Jorge, Benzinou, Abdesslam   +4 more
openaire   +2 more sources

Relationships between Fish Sizes and Otolith Sizes of Whiting (Merlangius merlangus Linnaeus, 1758) from the Western Black Sea

Aquatic Sciences and Engineering, 2020
The objective of this study was to determine the regressions between otolith sizes and shape indices vs. fish length, and weight of whiting, Merlangius merlangus (Linnaeus, 1758), from the Black Sea. Samples were collected randomly from commercial bottom
Taner Yıldız
doaj   +1 more source