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.
SUMMARY:The otolith morphology, biometry and the relationship between the otolith size and fish length were examined. The weight, length, width, area and perimeter were recorded for each pair of otoliths. The values of form factor (FF), roundness (RD), aspect ratio (AR), circularity (C), rectangularity (R) and elipticity (E) were calculated and the relationships between otolith length (OL) and shape indices were showed with graphics. According to paired t-test results, difference between right and left otoliths was important statistically (P<0.05), except otolith length. It is the first time, the difference of otolith variables were observed not only right and left pairs but also females and males of fish a member of Cyprinidae. While the otolith weight had the lowest coefficient of determination (r 2 ) such as 0.69; 0.59; 0.65, otolith length had the highest 0.80; 0.81; 0.80, for female, male and all specimens, respectively. In addition, SEM images were firstly shown for otoliths of B. tauricus to determine the otolith morphology.
The lower Melet River is a drinking water source that is surrounded by hazelnut grove, agricultural lands, resulting in the accumulation of genotoxic agents such as mining activities, various domestic and agricultural wastes. Therefore, it receives many domestic and agricultural wastes that contain the genotoxic agent. This study was aimed to assess the heavy metal concentrations in water, sediment, and bioaccumulation in the tissues of Alburnus chalcoides. Comet assay and micronucleus test were used to evaluate the genotoxic effects on the blood cells of A. chalcoides. The concentrations of heavy metals and metalloid in the water, in the sediments and in the muscle of fish were in the
This study focuses on the relationships between otolith measurements and total length; otolith shape indices and the total length; among otolith measurements for three Atherina boyeri populations (Lake Eğirdir, Lake İznik, and Hirfanlı Dam Lake) to determine regional variations of these populations in Turkey. 356 specimens with 41.0-103.6 mm total length of three A. boyeri populations were examined and their otoliths were extracted and measured. Otolith width is the strongest indicator for the three A. boyeri populations although the otolith length, width, and weight are good indicators for the fish length in the different populations. The linear relationship was determined between A. boyeri total length and sagittal otolith sizes in the three populations. However, the best model for the relationships among otolith sizes can be change depends on populations differentiation. Exponential model is the best model for Lake Eğirdir population while the linear model is the best model for Lake İznik and Hirfanlı Dam Lake populations.
Bu çalışmada, Marmara Denizi’nin Tekirdağ açıklarında yayılım gösteren P. acarne türünün boy-ağırlık ve boy-boy ilişkileri ile kondisyon faktörü değerlerinin belirlenmesi amaçlanmıştır. 2017 ve 2018 yılları arasında yerel balıkçılarla koordineli bir çalışmanın sonucunda elde edilen toplam 294 balık bireyi incelenmiştir. Balık bireylerinin total boy(TB), çatal boy ve standart boy ölçümleri 0,1 cm hassasiyette yapılmıştır. Balıkların ağırlıkları(W) ise 0,1 g hassasiyetle belirlenmiştir. Yapılan t testi sonucunda dişi ve erkek bireylerin ölçümleri arasında istatistiksel fark olmadığı için bu çalışmada dişi ve erkek bireyler beraber değerlendirilmiştir. Eşey ayrımı gözetilmeden değerlendirilen P. acarne bireyinin minimum kondisyon faktörü değeri 0,9954 ve maksimum kondisyon faktörü değeri ise 1,4539 olarak hesaplanmıştır. P. acarne’nin boy-ağırlık ilişkisi denklemi ve korelasyon katsayısı sırasıyla W=0,02TB2,8142 ve r²=0,8409 olarak belirlenmiştir. Boy-ağırlık ilişki denklemindeki “b” değerinin %95’lik güven aralığı 2,8109-2,8164 olarak bulunmuştur. P. acarne türünün bu habitatta negatif allometrik bir büyüme gösterdiği belirlenmiştir. P. acarne türünün çatal boy-total boy, standart boy-total boy ve standart boy-çatal boy ilişkileri denklemleri ve korelasyon katsayıları sırasıyla y=0,7767x+0,1565 (r²=0,8910), y=0,8833x+0.2836 (r²=0,9185) ve y=0,8273x+0,4961 (r²=0,8585) olarak belirlenmiştir. Belirlenen popülasyon parametreleri P. acarne türünün Marmara Denizi Tekirdağ popülasyonu için ilk verilerdir.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.