Akademik Veri Yönetim Sistemi
6. International Eurasian Conference onScience, Engineering and Technology (EurasianSciEnTech 2025), Ankara, Türkiye, 25 - 27 Haziran 2025, ss.85, (Özet Bildiri)
Oğuz Yılmaz1* (ORCID: https://orcid.org/0009-0009-6729-5302),
Ali İşmen2 (ORCID: https://orcid.org/0000-0003-2456-0232)
*1Çanakkale Onsekiz Mart University, School
of Graduate Studies, Fisheries and Fish Processing Department, Çanakkale, Türkiye.
2 Çanakkale Onsekiz Mart University, Marine
Science and Technology Faculty, Fisheries and Fish Processing Çanakkale, Türkiye.
*Corresponding
author e-mail: yilmazoguztr@gmail.com
Abstract
Big-scale Sand Smelt, Atherina
boyeri, is an estuarine resident species, which usually lives lower parts
of the rivers, lagoons, and the coastal areas of the seas. The aim of the
present study is to reveal the mean abundance, spatial and temporal variation
of abundance and reveal some biological parameters (length-frequency distribution,
length-weight relationship, otolith-fish size relationship, otolith shape
analyses etc.) of the A.boyeri,
distributed in the coastal waters of the Sea of Marmara. Individuals were
obtained with beach seine sampling at 12 various stations from the coastal
areas of the Marmara Sea between December 2021 and March 2022. A total of 1728
individual were obtained, and ranged in length between 3.07 and 15.30 cm TL and
weighted from 0.05 to 21.15 g. The lowest and the highest mean lengths were
calculated in March (6.24 cm TL) and January (7.30 cm TL), respectively. The mean CPUE (Catch per Unit Effort) and
CPUA (Catch per Unit Area) were detected as 18 ind./haul and 0.48 ind./300 m2,
respectively. The lowest and the highest CPUE were found in March (11.58 ind./haul)
and January (23.75 ind./haul), respectively. The highest abundance was found in
Erdek station, with a 28.4% of the total catch and 61.4 ind./haul mean
abundance. The lowest and the highest mean lengths were found in Erdek (6.00
cm) and Ayazma (10.89 cm), respectively. The
total length-fork length relationship and the length-weight relationship were
calculated as FL:0.927*TL+0.0811 (r2: 0.992) and W=0.005*TL3.054
(r2=0.932), respectively. Otolith length was ranged between
1.010 and 4.198 mm (2.284±0.051 mm) in length. A strong linear relationship was
detected between the total length-otolith length, with a given formula: OL=0.0377*TL-0.397
(r2=0.92). Due to the restricted scientific information related the
fish biology of the A.boyeri stocks
distributed in the Sea of Marmara, the results of the present study may be
useful for the researchers and the fisheries management authority of Türkiye.
Keywords: Abundance, spatial variation,
temporal variation, otolith, size, relationship