Using otolith shape and morphometry to identify four Alburnus species (A. chalcoides, A. escherichii, A. mossulensis and A. tarichi ) in Turkish inland waters

Abstract

Using otolith shape and morphometry to identify four Alburnus species (A. chalcoides, A. escherichii, A. mossulensis and A. tarichi) in Turkish inland waters Summary Asteriscus otolith shapes as well as their morphometry and shape contours were investigated in order to identify four allopatric Alburnus species: A. chalcoides (G€ uldenst€ adt, 1772) (Ordu), A. escherichii Steindachner, 1897 (Eskis ßehir), A. mossulensis Heckel, 1843 (Tunceli), and A. tarichi (G€ uldenst€ adt, 1814) (Van) in Turkish inland waters. These were compared using the shape indices (form factor, roundness, circularity, ellipticity, rectangularity and aspect ratio), and the morphological characters [otolith weight (OWE), otolith length (OL), otolith width (OW), otolith perimeter (OP), and otolith area (OA)]. The overall canonical discriminant analysis (CDA) classification score was 93.8%, with the lowest score for A. escherichii (82.5%) and the highest for A. chalcoides (100%). The otolith shapes, morphology and shape contours of all sampled fish were a clear species differentiator, thereby demonstrating that the otolith shape is species-specific. The current study presents for the first time comprehensive variation information on interspecific leftright asteriscus otoliths in males and females of each Alburnus species: A. chalcoides from Ordu, A. escherichii from Eskis ßehir, A. mossulensis from Tunceli and A. tarichi from Van, based on a total of 307 individuals. Scanning electron microscopy (SEM) images, shape contours and other otolith characters vary within the same genus; these differences should be investigated not only in other freshwater fish species or genera but also in the same species living in different habitats. In addition, further investigation is required not only with respect to the morphometry, biometry, shape, geometry, and shape contours of the otoliths, but also regarding the genetic methods for robust identification of various sympatric and allopatric fish populations. U.S.

Sagittal Otolith Morphology of Sharpsnout Seabream Diplodus puntazzo (Walbaum, 1792) in the Aegean Sea

“…Otolith morphology was indicated species and genus diagnostic in marine and freshwater species (Bostanci et al;Tuset et al, 2015). Small differences in left and right sagittal otolith shape and shape indices were determine in D. puntazzo inhabiting the Aegean Sea (Tables II and III).…”

“…Due to the combined effects of genetics and environment, fish with different life histories often show variation in otolith morphology and shape. Therefore, the characteristics have been considered crucial criteria in fisheries (Bostanci et al, 2015). Their species specific properties have been extensively used to identification, discrimination, and ageing (Cardinale et al, 2004) in freshwater and marine species.…”

“…Their species specific properties have been extensively used to identification, discrimination, and ageing (Cardinale et al, 2004) in freshwater and marine species. Studies of otolith morphology, contour shape have recently increased more and more in importance with the development of digital techniques, image analysis systems and shape analysis methods (Zhuang et al, 2014;Bostanci et al). The otoliths and the techniques-methods have proven to be a powerful time-and cost-efficient in the identification of various freshwater and marine species (Sadighzadeh et al, 2012;Tuset et al, 2013;Bostanci et al).…”

Otolith Shape Analysis of Bluefish, Pomatomus saltatrix (Linnaeus, 1766) in the Black Sea Region (Samsun, Turkey)

“…Otoliths are calcified structures involved hearing and balance system, and also they are flight recorders of fishes (Lecomte-Finiger, 1999) containing reliable fingerprints that are considered as an invaluable source of information for reconstructing a fish's entire life cycle (Campana and Thorrold, 2001). In recent years, otoliths are preferred in many studies (Short et al 2006;Bostancı et al 2015;Zengin et al, 2015;Pavlov 2016;Moreira et al, 2019), because otolith shape is species specific.…”

“…Stock identification is a basic requirement to describe the stock status and to support better stock assessment of fishery (Cadrin et al, 2005).Otolith shape analysis is a basic method for seperating fish stocks. Also there are a lot of studies about intraspecific variations of fish stocks from otolith shape (Vignon and Morat, 2010;Bostancı et al 2015;Zengin et al, 2015;Hüssy et al, 2016;Avigliano et al, 2017;Saygin et al, 2017;Bostancı and Yedier, 2018;Song et al, 2018;Yedier et al, 2019). Otoliths are innate data archives that document information in their microstructure and chemistry at different spatial and temporal scales related to their growth and environment (Miyan et al, 2016).…”