Freshwater and brackish water Malacostraca (Crustacea-Arthropoda) fauna of Sinop and Samsun and their ecology
Mehmet Akbulut, M. Ruşen Ustaoğlu, Ekrem Şanver Çelik
Çanakkale Onsekiz Mart University, Fisheries Faculty, Çanakkale,TURKEY
Ege University, Fisheries Faculty, Izmir, TURKEY
Malacostraca fauna collected from freshwater and brackishwater in Sinop and Samsun were studied from 181 stations between February 1999 and September 2000. 19 species and 4 subspecies belonging to 15 genuses were found in 134 stations. In total, 23 taxon were found: 11 Amphipoda, 6 Decapoda, 4 Isopoda, and 2 Mysidacea. Limnomysis benedeni is the first time in Turkish Mysidacea fauna. In this work at the first time recorded group are Gammarus pulex pulex, Gammarus aequicauda, Gammarus uludagi, Gammarus komareki, Gammarus longipedis, Gammarus balcanicus, Echinogammarus ischnus, Orchestia stephenseni Paramysis kosswigi, Idotea baltica basteri, Idotea hectica, Sphaeroma serratum, Palaemon adspersus, Crangon crangon, Potamon ibericum tauricum and Carcinus aestuarii in the studied area. Potamon ibericum tauricum is the most encountered and widespread species.
Keywords: Freshwater, brackish water, Malacostraca, Sinop, Samsun, Turkey
The effect of sodium chloride concentration on the assay of LAS in seawater by MBAS methods
Kartal Çetintürk, Kasım Cemal Güven
Institute of Marine Science and Management, Istanbul University, 34470, Vefa, Istanbul, TURKEY
Present address: TUDAV (Turkish Marine Research Foundation) Beykoz, Istanbul, TURKEY
The effect of salinity in seawater on methylene blue active substance (MBAS) method for LAS determination was investigated. To reproduce the salinity of the Black Sea (18 ‰), Sea of Marmara (24 ‰) and Mediterranean Sea (34 ‰), we used sodium chloride from Aegean Sea, Merck and Baker products. Standard curve of LAS was drown in seawater reproduced in the same salinity. It was found that the purity and concentration of sodium chloride have an effect on the LAS level determined by Standard Methods in sample tested. Merck and Baker sodium chloride give similar results but using common salts, the results are more reliable.
In this work we proposed a modification improve MBAS assay in seawater as follows:
1. Standard LAS solution must be prepared with common salts with the same concentration as seawater tested.
2. The blank chloroform used was prepared applying the procedure of calibration curve of LAS determination by MBAS method omitting LAS.
3. The extraction with chloroform was made 6 times instead of 3 times.
4. The calibration curve of LAS was plotted using common salts instead of distilled water, with the same salinity of seawater examined.
5. Correlation equation were calculated from the equations of different salinity of seawater (18, 24, 34 ‰).
Keywords: LAS, sodium chloride, MBAS method
First record of the lionfish Pterois miles (Bennett 1828) from the Aegean Sea
Cemal Turan, Bayram Öztürk
Marine Science and Technology Faculty, Iskenderun Technical University, Iskenderun, TURKEY
Faculty of Fisheries, Istanbul University, Istanbul, TURKEY
Turkish Marine Research Foundation (TUDAV), P.O. Box: 10, Beykoz, Istanbul, TURKEY
The lionfish Pterois miles (Bennett 1828) was observed by scuba diving in August 2015 at 11 m depth on sandy bottom in Dalyan on the Aegean Sea coast of Turkey. This is a lessepsian species entering the Mediterranean Sea through the Suez Canal. All urgent measures such as killing, eliminating and fishing are proposed to avoid the expansion of this venomous fish species in the Turkish waters and adjacent area.
Keywords: Aegean Sea, lessepsian migration, Pterois miles, Suez Canal,Turkey
First record of the moon crab Ashtoret lunaris (Forskål 1775) from Turkish waters
Cemal Turan, Ali Uyan, Deniz Ergüden, Mevlüt Gürlek, Servet A. Dogdu, Necdet Uygur
Marine Sciences and Technology Faculty, Iskenderun Technical University, TR31220 Iskenderun, Hatay, TURKEY
Maritime Vocational School, Iskenderun Technical University, Iskenderun, Hatay, TURKEY
The first record of the moon crab Ashtoret lunaris (Forskål 1775) is reported for the Turkish waters. Four specimens of A. lunaris were captured in Iskenderun Bay, Northeastern Mediterranean coast of Turkey at depth about 17m by gill net on 18 August 2015. The moon crab is the first non-native crab from the family Matutidae established in the Turkish coast.
Keywords: Moon crab, Ashtoret lunaris, first record, Turkish waters, lessepsian migrant
On the occurrence of Paradella dianae (Isopoda) in Fethiye Bay (Levantine Sea)
Fevzi Kırkım, Tahir Özcan,Tuncer Katağan
Department of Hydrobiology, Fisheries Faculty, Ege University, 35100 Bornova, Izmir, TURKEY
Department of Marine Sciences, Marine Sciences and Technology Faculty, İskenderun Technical University, 31200, Iskenderun, Hatay, TURKEY
A single specimen of Paradella dianae (Menzies 1962) (Isopoda, Flabellifera, Sphaeromatidae) was collected at the depths ranging 0-5 m on the rocky bottom of the Cape Dogan in Fethiye Bay on the Levantine Sea coast of Turkey on 9 July 2008. The alien isopod, P. dianae, is reported from Turkish coast for the first time.
Keywords: Paradella dianae, isopod, alien species, Fethiye Bay, Levantine Sea
Record of reticulated leatherjacket, Stephanolepis diaspros Fraser-Brunner, 1940 (Tetradontiformes: Monacanthidae) from Izmir Bay, Aegean Sea, Turkey
Okan Akyol, Aytaç Özgül
Faculty of Fisheries, Ege University, 35440, Urla, Izmir, TURKEY
A specimen of lessepsian Stephanolepis diaspros, 177 mm in total length, was caught on 27 October 2014 by a commercial trammel net off Urla coast in Izmir Bay on sandy bottom at a depth of 6 m. This record is not only the first one but also the fifth lessepsian fish species found in Izmir Bay in the northern Aegean Sea.
Keywords: Reticulated leatherjacket, Stephanolepis diaspros, lessepsian, Izmir Bay, Aegean Sea
First record of Lutjanus fulviflamma (Osteichthyes: Lutjanidae) in the Mediterranean Sea
Adriana Vella, Noel Vella, Sandra Agius Darmanin
Conservation Biology Research Group, Department of Biology, University of Malta, Msida MSD2080, MALTA
This paper presents the first record of Dory snapper, Lutjanus fulviflamma in the Mediterranean Sea. The specimen was caught from Valletta Waterfront, Malta (Central Mediterranean) on the 15th of December 2013. The species was identified through morphometric and meristic characters. Genetic analyses of the mitochondrial DNA sequences (COI, CO2, ND4 and Cytb) verified the species’ identity, while phylogenetic analyses revealed that the specimen was of East African origin possibly finding its way into the Mediterranean Sea as a Lessepsian migrant through the Suez Canal due to the ongoing Erythrean invasion.
Keywords: Lutjanus fulviflamma, alien, genetics, Mediterranean, Malta
Bioeroding sponge species (Porifera) in the Aegean Sea (Eastern Mediterranean)
Alper Evcen, Melih Ertan Çınar
Department of Hydrobiology, Faculty of Fisheries, Ege University, 35100 Bornova, İzmir, TURKEY
In the present study, a total of 11 bioeroding sponge species belonging to 4 families were found on rocky substrata in Ildırı Bay (eastern Mediterranean), five of which (Dotona pulchellamediterranea, Volzia albicans, Delectona madreporica, Siphonodictyon infestum and Thoosa mollis) are new records for the eastern Mediterranean fauna. The most abundant and frequent species in the area were Chondrosia reniformis, Spirastrella cuntatrix and Cliona celata. The morphological and distributional features of the species that are new to the Turkish marine fauna are presented. In addition, a checklist of the bioeroding sponge species reported from the Mediterranean coasts to date is provided.
Keywords: Bioerosion, boring sponges, biodiversity, Mediterranean, Aegean Sea, Turkey
Records of predatory, con-specific and human induced mauls on fish from the Northeast Atlantic and Black Sea
Violin Stoyanov Raykov, João Pedro Barreiros
Institute of Oceanology, Bulgarian Academy of Sciences, 40 Parvi mai str., 9000 Varna, BULGARIA
CE3C – Centre for Ecology, Evolution and Environmental Changes / Azorean Biodiversity Group and Universidade dos Açores – Departamento de Ciências Agrárias, 9700-042 Angra do Heroísmo, PORTUGAL
Present study aims to describe records of mauled and con-specific injures in various fish inhabiting different environment and to discuss possible impacts on fish behavior and ontogenesis. The fish specimens were collected from the Black Sea and Azores Islands (NE Atlantic). Individuals of European flounder, Pleuronectes flesus, common stingray, Dasyatis pastinaca and turbot, Scophthalmus maximus with missing dorsal and caudal fins and flesh, were found in the Black Sea. Specimens with severe mauls of the ocean sunfish, Mola mola, almaco jack, Seriola rivoliana and sargo, Diplodus sargus were recorded from the Azores Islands. All of them were caught alive and survived severe mauls caused by predators or by accidents with propellers, fishing nets. The NE Atlantic records, although possibly caused by natural predation, are more probably than not the result of negative interactions with human activity. Numerous records of mauled fish species from both regions show that the problem with adverse effects of fisheries is quite important. Predatory and con-specific injuries obviously are compatible with basic fish vital functions of described cases. The problem with negative anthropogenic interactions seems to be insufficiently investigated and need more attention by responsible managers and decision makers.
Keywords: Black Sea, North Atlantic, mauls, predation, human activity
Blocking of the upper layer flow in the Çanakkale (Dardanelles) Strait and its influence on fish catches
Murat Gündüz, Emin Özsoy
Institute of Marine Sciences and Technology, Dokuz Eylül University, Izmir, TURKEY
Institute of Marine Sciences, Middle East Technical University, Erdemli, TURKEY
Migrating fish are challenged by a series of physical barriers as they pass through the Turkish Straits System (TSS) such as the strong mixing zones and blocking of water transport in the Straits. The possible influence of the Çanakkale (Dardanelles) Strait blocking on fish migration is investigated. For this purpose, a numerical ocean model of the TSS has been implemented to predict transports of water at the Çanakkale (Dardanelles) Strait. Results are used to investigate the relationship between the blocking events and wind stress magnitude and direction in the North Aegean Sea. The analysis showed that upper layer blocking occurs when the wind stress magnitude exceeds a certain threshold in the 0-70° sector. Inter-annual time-series of upper layer blocking events deduced from wind stress for the 1979-2013 periods was used as proxy variable found to be highly correlated with the fish catch in the Aegean Sea and the Black Sea.
Keywords: Çanakkale Strait, blocking events, Aegean Sea, fish catch