Catch per Unit Effort and Mortality Rates of Two Sparid Species, Pagellus acarne and Pagellus erythrinus from Bottom Trawl Fishery in Izmir Bay, Aegean Sea

Gurbet, Rasit
Yalcin, Esin
This study was carried out by using experimental trawl surveys in Izmir bay (Aegean sea) with seasonal basis between 2007 and 2009. A total of 707 specimens of P. acarne sampled were ranged from 7 cm (7.5 g) to 19.8 cm (137.5 g) with average 12.4 +/- 0.06 cm FL (35.2 +/- 0.57 g) while a total of 11 27 P. erythrinus specimens were also ranged from 4.6 cm (1.8 g) to 22.3 cm (247.8 g) with average 13.1 +/- 0.09 cm FL (50.8 +/- 1.02 g). The maximal CPUE was found in Autumn (0.53 +/- 0.14 kg h(-1)) for P. acarne while in Spring (1.29 +/- 0.47 kg h(-1)) for P. erythrinus. The high exploitation rates (E = 0.65 year(-1) for P. acarne and E = 0.61 year(-1) for P. erythrinus) indicates the over-fishing on both Pagellus populations in the Aegean sea.


Seasonal Changes in the Composition and Abundance ofZooplankton in the Seas of the Mediterranean Basin
Kovalev, Av; Mazzocchı, Mg; Toklu Alıçlı, Benin; Skryabın, Va; Kıdeyş, Ahmet Erkan (2003-01-01)
Seasonal changes in the composition, abundance and biomass of zooplankton in the seas of the Mediterranean basin (the Mediterranean, Black and Azov seas) have been reviewed using our own data and data from the literature. In the deep-water central regions of the seas, the seasonal cycle of zooplankton abundance is characterised by one maximum occurring in spring or summer. In the coastal regions, two to three peaks (spring, summer and autumn) exist for the zooplankton abundance. The amplitude of seasonal fl...
Distribution of the alien ctenophore Mnemiopsis leidyi in the Caspian Sea in August 2001
Kıdeyş, Ahmet Erkan (2003-01-01)
In this study, spatial and vertical distributions of the invasive ctenophore Mnemiopsis leidyi in the Caspian Sea were evaluated by using data collected at 41 stations during the August 2001 cruise. A comparison of data from different depths revealed that M. leidyi were generally confined to surface waters. The maximum size of the ctenophore was only 41-45 mm, and the bulk of individuals (85.5%) were < 10 mm in length. The average and maximum biomasses of M. leidyi were calculated as 120 and 351 g wet weigh...
Determinants of temperature and salinity in the Levantine Sea using in-situ data
Serimözü, Cem; Taşıran, Ali Cevat; Sustainable Environment and Energy Systems (2019-8)
The Levantine Sea, part of the Eastern Mediterranean where international interests collide and exposed to rising anthropogenic pressure, is our focus in this study. Additionally, four of its sub-regions: Cilician and Levantine Basins, Coastal Nile Delta and Rhodes Gyre are chosen. On account of the relative scarcity of scientific studies of these regions, we aimed to contribute to the investigation of Sea Water Temperature and Salinity, two critical oceanographic parameters in the context of climate change....
Climate variability and deep water mass characteristics in the Aegean Sea
Georgiou, S.; Mantziafou, A.; Sofianos, S.; Gertman, I.; Ozsoy, E.; Somot, S.; Vervatis, V. (2015-01-15)
The main objective of this study is to investigate the variability of the thermohaline characteristics of the deep-water masses in the Aegean Sea and the possible impact of the regional atmospheric forcing variability by analyzing the available oceanographic and atmospheric datasets for the period of 1960-2012. During this period the variability of the deep water characteristics of the Aegean sub-basins is found to be very large as well as the diversity of the deep water characteristics among the sub-basins...
Length-weight relationships of 28 fish species caught from demersal trawl survey in the Middle Black Sea, Turkey
Dagtekin, Murat; Genc, Yasar; Kasapoglu, Nazli; Erik, Gokhan; Misir, Devrim Selim; Ilhan, Salih; Ok, Meltem; Altuntas, Cemil; ÖZSANDIKÇI, UĞUR; Buyukdeveci, Ferhat; Kaya, Tugba; Cebeci, Ayse; Saltan, Asiye Nur; Hasimoglu, Atila; Firidin, Sirin; Ozdemir, Muhammed Dogan (2022-01-01)
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 al...
Citation Formats
R. Gurbet, O. AKYOL, and E. Yalcin, “Catch per Unit Effort and Mortality Rates of Two Sparid Species, Pagellus acarne and Pagellus erythrinus from Bottom Trawl Fishery in Izmir Bay, Aegean Sea,” JOURNAL OF ANIMAL AND VETERINARY ADVANCES, pp. 113–118, 2012, Accessed: 00, 2020. [Online]. Available: