A REVIEW ON THE PROBLEMS OF LAS DETERMINATION METHODS IN SEA WATER

A review on the problems of LAS determination methods in sea water

Kasım Cemal Güven, Burak Çoban

Turkish Marine Research Foundation (TUDAV), 34820, Beykoz, Istanbul, TURKEY
Department of Chemistry, Faculty of Science and Letters, Zonguldak Bulent Ecevit University, 67100, Zonguldak, TURKEY

Abstract

In this paper, the research made on the factors which influence the determination of LAS in sea water by MBAS and HPLC methods was summarized. These factors are purity of LAB and LAS, degradation, light, storage time, salinity and methods used for analysis. These factors were discussed and a modification on the MBAS method was proposed.

Keywords: LAB, LAS, factors, purity, degradation, MBAS

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CHONDRICHTHYAN SPECIES AS BY-CATCH: A REVIEW ON SPECIES INHABITING TURKISH WATERS

Chondrichthyan species as by-catch: A review on species inhabiting Turkish waters

Elizabeth Grace Tunka Bengil, Nuri Başusta

Marine School, Girne American University, University Drive, Karmi Campus, Karaoglanoglu, Girne, TRNC, TURKEY
Akdeniz Koruma Derneği, Doga Kent Villaları, 3360 sokak, No.7/16, Urla, Izmir, TURKEY
Fisheries Faculty, Firat University, 23119, Elazig, TURKEY

Abstract

Chondrichthyan or cartilaginous species, throughout the world, are found among fisheries by-catch. In this study, 52 studies conducted between 1991 and 2018 in Turkish waters were reviewed to assess the status of chondrichthyan species as by-catch. Geographic coverage was grouped as; Black Sea (the number of studies 5), Sea of Marmara (6), Aegean Sea (25), and Levantine Sea (16). Results showed that there were differences in by-catch amounts when sharks, rays and chimaeras were compared according to geographical grouping. When by-catch ratios of listed species were analyzed it showed that almost half of the by-catch was comprised of small spotted catshark, Scyliorhinus canicula (Linnaeus, 1758), followed by blackmouth catshark, Galeus melastomus Rafinesque, 1810. In case of rays, the most common species of by-catch was thornback ray, Raja clavata Linnaeus, 1758, followed by common stingray, Dasyatis pastinaca (Linnaeus, 1758). Among all reported species concerned, 9 were Critically Endangered, 8 Endangered, 7 Vulnerable, 13 Near Threatened, 8 Least concern, 9 were Data Deficient, according to IUCN Red List, corresponding to half of the Turkish cartilaginous fauna. This review aims to provide on the by-catch of cartilaginous species caused by scientific or commercial fisheries activities in the Turkish waters emphasizing on long-needed conservation action plans for future sustainability of these cartilaginous species.

Keywords: Chondrichthyan species, by-catch, Turkish waters, threatened species

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A STUDY ON MORPHOMETRIC CHARACTERISTICS OF OTOLITH FOR A NEW MAXIMUM LENGTH RECORD OF THE BLUEFISH (POMATOMUS SALTATRIX, LINNEAUS 1766) IN THE SEA OF MARMARA

A study on morphometric characteristics of otolith for a new maximum length record of the bluefish (Pomatomus saltatrix, Linneaus 1766) in the Sea of Marmara

Habib Bal, Telat Yanık, Dilek Türker

Livestock Research Institute, Department of Fisheries, Bandırma, Balıkesir, TURKEY
Department of Aquaculture, Fisheries Faculty, University of Atatürk, Erzurum, TURKEY
Department of Biology, Faculty of Science and Arts, University of Balıkesir, Balıkesir, TURKEY

Abstract

This study reports a third maximum length record for bluefish Pomatomus saltatrix (Linnaeus, 1766) for the Turkish water. The P. saltatrix specimen was captured in the Biga Peninsula in the southwestern Sea of Marmara. Its length was 73.4 cm and weight was 3600 g. The age was determined by the otolith as 6 years old. This is the first study to examine otolith of such a large specimen in Turkey.

Keywords: Bluefish, Pomatomus saltatrix, maximum length, Sea of Marmara

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A NEW RECORD OF IMPERIAL BLACKFISH, SCHEDOPHILUS OVALIS(CUVIER, 1833) FROM THE BAY OF IZMIR (AEGEAN SEA, TURKEY)

A new record of imperial blackfish, Schedophilus ovalis(Cuvier, 1833) from the Bay of Izmir (Aegean Sea, Turkey)

Okan Akyol, Aytaç Özgül

Faculty of Fisheries, Ege University, 35440, Urla, Izmir, TURKEY

Abstract

A specimen of imperial blackfish Schedophilus ovalis was caught on 15 April 2018 from the Gülbahce coasts, Izmir Bay at a depth of 8 m. This ichthyologic note presents the first confirmed record of imperial blackfish from the shallow waters of Izmir Bay, NE Aegean Sea and the third for the Turkish waters.

Keywords: Imperial blackfish, Schedophilus ovalis, new record, Izmir Bay, NE Aegean Sea

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POSSIBLE INTRUSION OF LAGOCEPHALUS SCELERATUS (GMELIN, 1789) TO THE TURKISH BLACK SEA COAST

Possible intrusion of Lagocephalus sceleratus (Gmelin, 1789) to the Turkish Black Sea coast

Murat Bilecenoğlu, Bayram Öztürk

Department of Biology, Faculty of Arts & Sciences, Aydın Adnan Menderes University, 09010 Aydın, TURKEY
Department of Marine Biology, Faculty of Aquatic Sciences, İstanbul University, 34470 İstanbul, TURKEY
Turkish Marine Research Foundation, P.O. Box: 10, Beykoz, 34820, Istanbul, TURKEY

Abstract

Capture of a single individual of Lagocephalus sceleratus from Türkeli shore (Sinop, Turkey) by an artisanal fisherman appeared in a local newspaper on December 2017, which represents the second occurrence record of the species from the Black Sea. Due to its highly invasive character, urgent and tangible measures (i.e. eradication) are needed to be taken both by Turkey and the neighboring countries.

Keywords: Lagocephalus sceleratus, Black Sea, lessepsian migration

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ADDITIONAL RECORD OF THE TRIPLETAIL FISH LOBOTES SURINAMENSIS (BLOCH, 1790) IN THE NORTHERN TUNISIAN DEEP WATERS (CENTRAL SOUTH MEDITERRANEAN)

Additional record of the tripletail fish Lobotes surinamensis (Bloch, 1790) in the northern Tunisian deep waters (central south Mediterranean)

Moez Shaiek, Sabri Jaziri, Ibrahim Ben Amer

Association Méditerranée Action-Nature (MAN, NGO), 01 rue d’Istanbul, 7000 Bizerte, TUNISIA
Faculty of Natural Resources and Environmental Science, University of Omar Mukhtar, El-Bayda, P.O. Box 919, LIBYA

Abstract

The present study reports the capture and recording of an individual of the tripletail fish Lobotes surinamensis in Esquerquis Bank (northern Tunisia) in February 2017. In Tunisia, it is the first record of the Herculian species in northern deep waters (around 200 meters) after the latest observation of L. surinamensis in 2015 from the coastal water. These reports of the Herculean species, chronologically closer together, lead us to believe that the species was established in the Tunisian waters.

Keywords: Non-indigenous species, Lobotes surinamensis, central Mediterranean, Tunisia

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A NEW RECORD AND RANGE EXTENSION OF AN INVASIVE AMPHIPOD CAPRELLA SCAURA TEMPLETON, 1836 IN TUNISIA, NORTH AFRICA

A new record and range extension of an invasive amphipod Caprella scaura Templeton, 1836 in Tunisia, North Africa

Sahar Chebaane, Moez Shaiek, Rym Zakhama-Sraieb

Association Notre Grand Bleu (NGB, NGO), Diar El Marina, 5000 Monastir, TUNISIA
University of Monastir, Higher Institute of Biotechnology of Monastir, Research Laboratory Bioresources, Biology Integrative and Valorization LR14ES06, Monastir, TUNISIA
Association Méditerranée Action-Nature(MAN, NGO), 01 rue d’Istanbul, 7000 Bizerte, TUNISIA
University of Tunis El Manar, Faculty of Sciences of Tunis, Unity of Research of Bio-ecology and Evolutionary Systematics. S11UR11, Tunis, TUNISIA
University of Manouba, High Institute of Biotechnology of Sidi Thabet, BiotechPôle, BP-66, 2020 Sidi Thabet, Ariana, TUNISIA

Abstract

We report the presence of the invasive amphipod Caprella scaura Templeton 1836 in the Bizerte Lagoon (North of Tunisia) in November 2017. This lagoon is approximately 100 km north from the Tunis Lagoon where the presence of C. scaura was previously recorded in 2014. This new species record is considered as the most northern in the southern Mediterranean. This invasive species was found attached to Cymodocea nodoa leaves, and the presence of adult male and gravid female specimens provides the evidence of a viable population in the site. This study showed that fouling has a positive impact on the settlement success of invasive species. We hypothesize that C. scaura was probably introduced to the Bizerte Lagoon through the fouling community on shellfish farms. We suggest that Bizerte Channel, used as commercial and fishing navigation, is an interesting area for future monitoring studies.

Keywords: Caprella scaura, invasive species, new record, Bizerte Lagoon, Tunisia

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PRELIMINARY ASSESSMENT OF THE EFFECT OF DIETARY PELARGONIUM SIDOIDES EXTRACT ON THE HAEMATOLOGICAL PROFILE OF COMMON CARP, CYPRINUS CARPIO LINNEAUS, 1758

Preliminary assessment of the effect of dietary Pelargonium sidoides extract on the haematological profile of common carp, Cyprinus carpio Linneaus, 1758

Funda Turan, Armağan Gezer

Faculty of Marine Science and Technology, Iskenderun Technical University, P.O. Box: 31200 Iskenderun, Hatay, TURKEY

Abstract

A preliminary study was conducted to evaluate the effect of the Pelargonium sidoides extract on the haematological profile of common carp, Cyprinus carpio. The fish (mean body weight 0.67±0.05 g) were fed with experimental diets prepared by using the supplementation of P. sidoides extract (0, 1, 3 and 5 ml 100 g-1) for 90 days. The highest hemoglobin concentration was registered in 3 ml 100 g-1 P. sidoides extract-supplemented diet (10.50±0.45 g l-1) and 5 ml 100 g-1 P. sidoides extract-supplemented diet (11.02±0.20 g l-1). Among the P. sidoides extract-supplemented groups, the highest white blood cell values were also found in 5 ml 100 g-1 P. sidoides extract-supplemented diet (28.98±1.62 G l-1). The highest values of mean corpuscular hemoglobin concentration (P < 0.05) were detected in 5 ml 100 g-1 P. sidoides extract-supplemented diet. Red blood cell, hematocrit, mean corpuscular volume and mean corpuscular hemoglobin levels were not affected by any of the experimental diets (P>0.05). The results of the present work have demonstrated that P. sidoides extract-based diet affect basic haematological profile of common carp.

Keywords: Common carp, Cyprinus carpio, Pelargonium sidoides, haematological profile

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THE MICROPHYTOBENTHOS DIATOMS OF THE SHALLOW WATERS OF THE BLACK AND AZOV SEA ECOSYSTEMS (1987–2017)

The microphytobenthos diatoms of the shallow waters of the Black and Azov Sea ecosystems (1987–2017)

Larisa Ryabushko, Daria Balycheva, Anna Bondarenko

A.O. Kovalevsky Institute of Marine Biological Research Academy of Sciences, Sevastopol, RUSSIA

Abstract

The paper summarizes original studies of species composition and quantitative data (abundance and biomass) of microphytobenthos diatoms of the different ecotopes of some protected areas of the Black and Azov ecosystems of the Crimean shallow waters (1987-2017). In total, 251 taxa were detected, which include benthic (194), benthoplanktonic (40) and planktonic (17) ones. 21 harmful species were identified, 18 of them causing the algal bloom. From all benthic and benthoplanktonic species, 75 taxa were in both seas, 221 taxa were found in the Black Sea and 92 ones were identificated in the Sea of Azov. These species belong to the three classes of Coscinodiscophyceae (18), Fragilariophyceae (35) and Bacillariophyceae (181) and represent 24 orders, 42 families and 71 genera. Marine (49.5% and brackish-marine (27.0%) species prevail, 64 taxa are indicators of organic pollution of water. The group of saprobiont species (64.0%), which is a typical for mesotrophic waters, i.e. those with moderate organic pollution, dominated. The phytogeographical elements of the diatom flora are identified as cosmopolitan (25.0%), boreal-tropical (25%), boreal (22%), arctical-boreal-tropical (19%), and arctical-boreal (9%) species. For the first time quantitative data of diatoms are presented. Comparative qualitative and quantitative data of benthic communities are discussed.

Keywords: Diatoms, microphytobenthos, protected areas, Black Sea, Azov Sea

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SIGHTINGS OF SMALL DELPHINIDS IN THE SOUTHERN ÇANDARLI BAY (AEGEAN SEA) BETWEEN 2015 AND 2018

Sightings of small delphinids in the southern Çandarlı Bay (Aegean Sea) between 2015 and 2018

Vahit Alan, Gökhan Kaboğlu, Barış Akçalı, Fethi Bengil, Bahar Ubay, Harun Güçlüsoy

Institute of Marine Sciences and Technology, Dokuz Eylül University, Haydar Aliyev Bul. No: 32 35340 İnciraltı, İzmir, TURKEY
Akdeniz Koruma Derneği (Mediterranean Conservation Society), Doğa Park Villaları No: 16 Kalabak, Urla, İzmir, TURKEY
Marine School, Earth System Science Research Center, Girne American University, Girne, TRNC, via TURKEY
STAR Refinery Siteler Mah. Aygaz Cad. No: 21/1 35800 Aliağa, İzmir, TURKEY

Abstract

This study was performed in the southern part of Çandarlı Bay between May 2015 and May 2018. The aim of the research was to determine the existing cetacean species and their distribution. Cetacean monitoring surveys were conducted biannually for three years, and the presence of bottlenose dolphin Tursiops truncatus and common dolphin Delphinus delphis were detected by visual observations. Total encounter rate of delphinids in the study was 1.7567 sightings per 100 km. The main reason for such a low encounter rate is considered as that the study area is in an industrial zone.

Keywords: Cetacean, monitoring, encounter rate, bottlenose dolphin, common dolphin

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