Yazar "Ok, Meltem" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Assessment of spatiotemporal distribution of benthic marine litter for the southern Black Sea coasts of Türkiye
    (Pergamon-Elsevier Science Ltd, 2025) Dagtekin, Murat; Kasapoglu, Nazli; Ok, Meltem; Ilhan, Salih; Buyukdeveci, Ferhat; Erik, Gokhan; Ozsandikci, Ugur
    This study investigates the prevalence and characteristics of benthic marine litter along the southeastern Black Sea coast. A two-year seasonal trawling survey (2017-2018) was conducted between & Ccedil;ayagzi Cape and & Uuml;nyeTas,kana Cape across three depth ranges to evaluate litter density and composition in accordance with the Marine Strategy Framework Directive (MSFD). The results indicate an average litter density of 48,744.69 +/- 7543.02 items/km2 and 151.35 +/- 14.04 kg/km2, with plastic accounting for over 50 % of the total debris. Statistical analyses of seasonal and depth variations revealed no significant differences in overall litter density; however, plastic items such as bags (36.4 %) and bottles (18.97 %) predominated consistently. The findings highlight the significant contribution of Turkey's coastline to regional marine litter, driven by intensive urban and industrial activities, further compounded by riverine inputs from major rivers discharging into the Black Sea. The study underscores the urgency of enhanced international collaboration and the development of comprehensive regional strategies to combat marine pollution. Insights into the distribution and density of benthic marine litter are critical for informing effective policy measures and raising public awareness to address the pervasive issue of marine litter in the Black Sea basin.
  • [ X ]
    Öğe
    Length-weight relationships of 28 fish species caught from demersal trawl survey in the Middle Black Sea, Turkey
    (Tubitak Scientific & Technological Research Council Turkey, 2022) Dagtekin, Murat; Genc, Yasar; Kasapoglu, Nazli; Erik, Gokhan; Misir, Devrim Selim; Ilhan, Salih; Ok, Meltem
    This study provides updated the length-weight relationships and Fulton's condition factor of 28 fish species belonging to 23 families from the Black Sea. Samples were collected along the depths between 0-100 meters by demersal trawl surveys conducted seasonally from May 2017 to September 2019. A total of 83,885 specimens were collected. The length-weight relationships and Fulton's condition factor, minimum, maximum and mean lengths, total weights, descriptive statistics, and growth type were provided for all the species. The results indicate that LWR parameters of b varied from 2.2039 to 3.737 and Fulton's condition factor varied between 0.004 and 1.18. These findings could be useful for monitoring and management of sustainable fisheries and habitat health.