Geometric morphometrics, Fourier analysis of otolith shape, and nuclear-DNA markers distinguish two anchovy species (Engraulis spp.) in the Eastern Mediterranean Sea

Download

index.pdf

Date

2014-11-01

Author

Karahan, Arzu
Gücü, Ali Cemal
Ozkan, Emel
Orek, Yesim Ak
ACAN, Sinan Can
KOBAN, Evren
TOGAN, Inci

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

208
views

204
downloads

Two anchovy forms identified from their external morphology and designated as 'Silver' and 'Blue' anchovies were captured in Mersin Bay (Eastern Mediterranean Sea). Silver anchovy seemed to inhabit shallower waters (9-77 m) than Blue anchovy (majority at depths of 69-111 m). Significant differences in body shape, which was analyzed through geometric morphometrics, and in otolith shape, examined using Fourier analysis, separated the two forms. Length polymorphisms at two intron and 9 microsatellite loci showed strong genetic differences between the two forms. Mersin-Bay Blue anchovy were genetically related to Engraulis encrasicolus from the Western Mediterranean Sea. Mersin-Bay Silver anchovy possessed an original genetic composition that distinguished them from both E. encrasicolus and Engraulis albidus at the two intron loci, while presenting affinities to E. albidus based on microsatellite markers. Mersin-Bay Silver anchovy were assigned to the latter species, of which they are considered as a geographically isolated population. This is the first record of E. albidus in the Levantine basin and confirmation of its presence in the Eastern Mediterranean Sea. These results have implications for the management of anchovy populations and their habitats.

Subject Keywords

Engraulis albidus, E. encrasicolus, Introns, Microsatellites, Mersin Bay

URI

https://hdl.handle.net/11511/30933

Journal

FISHERIES RESEARCH

DOI

https://doi.org/10.1016/j.fishres.2014.05.009

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Vertical distribution of marine cyanobacteria Synechococcus spp. in the Black, Marmara, Aegean, and eastern Mediterranean seas Uysal, Zahit (2006-01-01) The vertical distributions of the unicellular cyanobacteria Synechococcus were studied in several highly contrasting seas: the Black Sea, Sea of Marmara, Aegean Sea, and Mediterranean Sea. Cell abundances varied significantly on both vertical and horizontal scales in all physically and spatially discrete water masses. Epifluorescence microscope cell counts from all seas clearly showed that majority of the population remains suspended in the surface-mixed layer and decreases gradually towards the base of the...
Riverine Microplastic Loading to Mersin Bay, Turkey on the North-eastern Mediterranean Ozguler, Ulku; DEMİR, AYDENİZ; Kayadelen, Gulsah Can; Kıdeyş, Ahmet Erkan (2022-07-01) Microplastics sampled downstream from a total of eight rivers were analysed as the first attempt to determine microplastic composition in rivers and load to Mersin Bay, in the north-eastern Mediterranean Sea. With a share of 83.5%, fibres were the dominant category from all samples. Basic characteristics (form, colour, average size, polymer) of microplastics from these rivers were similar to those reported from the marine environment in Mersin bay. The overall average number of microplastics calculated for ...
Understanding the Impact of Environmental Variability on Anchovy Overwintering Migration in the Black Sea and its Implications for the Fishing Industry Güraslan, Ceren; Fach Salihoğlu, Bettina Andrea; Oğuz, Temel (2017-01-01) Black Sea anchovy (Engraulis encrasicolus) undertake extensive overwintering migrations every fall from nursery grounds to warmer overwintering areas located on the south-eastern coast of the Black Sea. During migration and particularly upon arrival at the Anatolian coast, they support an important fishery and valuable source of income for the regional community. Black Sea anchovy have undergone significant stock fluctuations partly related to climatic conditions, for example, migrating anchovy schools arri...
Seismic stratigraphy of Late Quaternary sediments of western Mersin Bay shelf, (NE Mediterranean Sea) Okyar, M; Ergin, M; Evans, G (Elsevier BV, 2005-10-15) High-resolution shallow seismic-reflection profiles obtained from the western Mersin Bay have revealed the existence of the two distinct depositional sequences (C and B) lying on a narrow and relatively steeply-sloping continental shelf which mainly receives its sediments from the ephemeral rivers. The upper Holocene sedimentary sequence (C) is characterized by stratified (simple to complex) to chaotic reflection configurations produced by the development of a prograding wedge of terrigenous sediment. Parti...
Molecular evolution and phylogeography of the eastern mediterranean water frog (pelophylax) complex Akın Pekşen, Çiğdem; Bilgin, Cemal Can; Plötner, Jörg; Department of Biology (2015) Water frogs (genus Pelophylax) in the eastern Mediterranean region represent a genetically and phylogenetically diverse group. Their dependence on freshwater habitats makes them highly sensitive to geological and climatic changes. Thus they are an ideal group to study the effect of past geological processes on molecular evolution of protein-coding and non-coding genes on the genome and on patterns of phylogeography in the eastern Mediterranean region. In the first study, the complete sequence of water frog ...

Citation Formats

A. Karahan et al., “Geometric morphometrics, Fourier analysis of otolith shape, and nuclear-DNA markers distinguish two anchovy species (Engraulis spp.) in the Eastern Mediterranean Sea,” FISHERIES RESEARCH, pp. 45–55, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30933.