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    A participatory approach to tagging and monitoring as an initial step in developing a sturgeon conservation strategy along the Turkish Black Sea Coast
    (Wiley-Blackwell, 2011) Tiril, S. Ustaoglu; Zengin, M.; Akbulut, B.; Memis, D.; Alagil, F.; Dagtekin, M.
    The objective of this study was to organise a national mechanism that would allow to effectively promote and control the gentle handling and release of accidentally caught sturgeons with the participation of the fishery while at the same time testing the effectiveness of such measures through tagging and continuous monitoring. A second objective was to develop through this exercise a participatory conservation strategy for sturgeons which is jointly executed by the research institutions, governmental agencies and commercial fishery. The samples of Acipenseridae which were captured accidentally in the fishing nets from the commercial fishers were released to sea after tagging with plastic T-bar tag and all the information about the fish species such as fish weight and length, capture locality, depth were recorded. Within these applications, carried out in collaboration with the Fisheries Cooperatives and fishermen in the Black Sea region, 99 fish (9, 22, 48 and 20 for the years 2006-2009, respectively) were tagged and released to the sea. Five of the tagged fish were re-captured and released again after recording the information on the tags.
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    Öğe
    Stimulating sturgeon conservation and rehabilitation measures in Turkey: an overview on major projects (2006-2009)
    (Wiley, 2011) Akbulut, B.; Zengin, M.; Ciftci, Y.; Tiril, S. Ustaoglu; Memis, D.; Alkan, A.; Cakmak, E.
    The aim of this report is to provide an overview of the current status of efforts on the potential rehabilitation of sturgeon populations in Turkish waters, describing the structure and the outcome of projects carried out since 2006 and identifying the strategic needs for sturgeon conservation measures at a national level. It is well known that there were six sturgeon species occurring around Turkish Black Sea coasts while entering the rivers, mainly Kizilirmak, Yesilirmak, Sakarya and Coruh Rivers for spawning. Anadromous sturgeon species have been strictly protected throughout Turkey since 1997. Conservation and management measurements have been implemented since 1970s. However, this was apparently with little success as stocks continued to decline and habitats deteriorated further, threatening the stocks with extinction. At the same time the needs for survival are not well documented. A project was initiated on 30 January 2006, consisting of seven-work packages including studies on population structure, reproduction, habitat assessment, genetic variability between and within stocks and the development of protective management strategies and plans. The work covered the Turkish Black Sea coastline and the rovers Yesilirmak, Kizilirmak, Coruh and Sakarya. Actively sampled and / or accidentally caught specimens have been tagged by T-bars and released after measurements and tissue sampling for genetic analyses. In addition, broodstocks of Russian sturgeon (Acipenser gueldenstaedtii), Beluga (Huso huso), and stellate (A. stellatus) are being built by rearing fish at the Central Fisheries Research (Yomra, Trabzon, Turkey) Institute. Reproduction studies have mainly focused on sperm collection, cryopreservation and induced spawning as well as on larval rearing.