concentration of mercury in selected tissues of the caspian lamprey (caspiomyzon wagneri) migrants in spawning season

Authors

شریف جورابیان شوشتری

sharif joorabian shooshtari department of environment, faculty of natural resources and marine sciences, tarbiat modares university, noor, iran مجتبی شیرود نجفی

mojtaba shirood najafi department of fisheries, faculty of natural resources and marine sciences, noor, iran ندا خسروی

neda khosravi department of fisheries, faculty of natural resources and marine sciences, noor, iran سید محمود قاسم پوری

seyed mahmoud ghasempouri department of environment, faculty of natural resources and marine sciences, tarbiat modares university, noor, iran عباس اسماعیلی ساری

abstract

background: mercury (hg) is considered a global pollutant because hg0 which is the predominant form of atmospheric hg resides in the atmosphere for as long as 0.5 to 2 years. mercury has many negative effects on the reproductive, respiratory, and immune systems. methods: in this study, 24 caspian lampreys (caspiomyzon wagneri) were transported to the university laboratory and then stored in -20 oc until they were dissected. the liver, muscle, skin, ovaries, and testes were all dissected out. all samples were freeze-dried and ground by a mortar and pestle into powder. the specimens were analyzed by a leco ama254 mercury analyzer. results: the order of mercury concentration in the lamprey tissues was as follows: muscle > ovaries > liver > skin > testes. the mean values of mercury in muscle and testes were 192.25 ± 7.10 and 21.42 ± 1.48 hg ng/g dry weight, respectively. there were no significant differences (n = 24) between the sexes in the hg level of most tissues except for gonads. discussion: a comparison with some ammocoetes of jawless fishes shows a 10 times less concentration than other records. this difference probably is due to non-parasitic behavior and use of various sources of nutrition in other species. conclusion: in comparison of other kind of sea lamprey, due to detritivore habits of caspian lamprey on a very specific part of food web (non-live food only in the sea floor), the supposed species can introduce as a special indicator of mercury and heavy metal levels in the aquatic ecosystem.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Concentration of Mercury in Selected Tissues of the Caspian Lamprey (Caspiomyzon wagneri) Migrants in Spawning Season

Background: Mercury (Hg) is considered a global pollutant because Hg0 which is the predominant form of atmospheric Hg resides in the atmosphere for as long as 0.5 to 2 years. Mercury has many negative effects on the reproductive, respiratory, and immune systems. Methods: In this study, 24 Caspian lampreys (Caspiomyzon wagneri) were transported to the university laboratory and then stored in ...

full text

Serum Biochemical Parameters of Caspian Lamprey, Caspiomyzon wagneri During Final Spawning Migration

Serum biochemical parameters are important aspects in the management of endangered species such as Caspiomyzon wagneri. The objective of this survey was to determine some serum ionic and metabolic parameters and those relationships in 22 migratory population of Caspian lamprey in shirood river (a river located at the south of Caspian sea). There was no significant (P<0.05) difference between le...

full text

the effect of the record infancy in crimilly acts of guilties (in karaj city)

چکیده یکی از مهمترین دغدغه های بزرگ جوامع بشری، از دیر باز تا کنون که ذهن پژوهشگران و متخصصان بهداشت روانی و اجتماعی و دولتها رابه خود مشغول داشته، مسأله ی بزهکاری می باشد. شناخت کامل پدیده ی بزهکاری و بزهکار، علل وعوامل سقوط یک انسان، چگونگی درمان وی و درنهایت پیشگیری ازبزهکاری ودریک کلام سالم سازی یک جامعه، رسالت عظیم، انسانی ومقدسی می باشد که با بررسی شخصیت مجرم یعنی[ انسانی که تحت شرای...

15 صفحه اول

Identifying the factors affecting the reduction of Caspian lamprey population (Caspiomyzon wagneri Kessler, 1870) in Shiroud River: The need to adopt management-protection policies

The Caspian lamprey (Caspiomyzon wagneri) is one of the most important ecological and native fish species of the Caspian Sea basin. The present study was conducted to identify the factors affecting the population decline of this species in Shiroud River as one of the important habitats of fish in the southern basin of the Caspian Sea. For this purpose, three stations were selected for sampling ...

full text

analysis of power in the network society

اندیشمندان و صاحب نظران علوم اجتماعی بر این باورند که مرحله تازه ای در تاریخ جوامع بشری اغاز شده است. ویژگیهای این جامعه نو را می توان پدیده هایی از جمله اقتصاد اطلاعاتی جهانی ، هندسه متغیر شبکه ای، فرهنگ مجاز واقعی ، توسعه حیرت انگیز فناوری های دیجیتال، خدمات پیوسته و نیز فشردگی زمان و مکان برشمرد. از سوی دیگر قدرت به عنوان موضوع اصلی علم سیاست جایگاه مهمی در روابط انسانی دارد، قدرت و بازتولید...

15 صفحه اول

the impact of e-readiness on ec success in public sector in iran the impact of e-readiness on ec success in public sector in iran

acknowledge the importance of e-commerce to their countries and to survival of their businesses and in creating and encouraging an atmosphere for the wide adoption and success of e-commerce in the long term. the investment for implementing e-commerce in the public sector is one of the areas which is focused in government‘s action plan for cross-disciplinary it development and e-readiness in go...

My Resources

Save resource for easier access later


Journal title:
iranian journal of toxicology

جلد ۵، شماره ۱۲، صفحات ۴۶۰-۴۶۷

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023