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Effect of Mercury on Survival, Metabolism and Behaviour of Larval Uca Pugilator (Brachyura)

Patricia J. DeCoursey and Winona B. Vernberg
Oikos
Vol. 23, No. 2 (1972), pp. 241-247
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3543412
Stable URL: http://www.jstor.org/stable/3543412
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effect of Mercury on Survival, Metabolism and Behaviour of Larval Uca Pugilator (Brachyura)
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Abstract

A battery of tests was used to determine the effects of three dilute mercuric chloride solutions on larval stages (Zoea I, III, V) of the fiddler crab Uca pugilator (Bosc). The influence of both acute and chronic exposures on viability, oxygen consumption, and swimming activity was measured. No stage V and only a few stage I or III larvae were able to survive a concentration of 9· 10-7 M HgCl2 (0.18 ppm Hg) longer than 24 hr; an exposure as short as 6 hr resulted in reduced metabolism and swimming rate of all stages. Although concentrations of 9· 10-9 M HgCl2 (0.0018 ppm) and 9· 10-11 M HgCl2 (0.000018 ppm) were sublethal, 24-hr exposures did affect metabolism and swimming. Some larvae reared in the more dilute mercury solutions developed to the megalopa stage, but survival was reduced in relation to the mercury concentration. The data from all tests suggest that toxicity of mercury increases with larval age. /// Применяли серию тестов для определения влияния растворов хлорида ртути трех разведений личиночныр стадии стадии (зоез I,III,V возрастов) крабов Ucapugilator (Воѕс.) Исследовали влияние короткого и длительноро действия хлорида ргути на выживаемость, потребление кислорода и активность плавания. Лишь некоторые некоторые личинки І и III возраста были способны переносить концентрацию 9× 10-7 M HgCl2 (0,18 ppm Hg) дольше одних суток- При 6-часовом действии препарата понижается активности метаболизма и двигательная активность у всех сгадий. Хотя концентрации 9× 10-9 M HgCl2 (0,0018 ppm Hg) и 9× 10-11 M (0,000018 ppm Hg) сублетальны, 24-часовое действие препарата отражается на активности метаболизма и плавания. Некоторые личинки, выведенные при действии более слабых растворов ртути, развивались до стадии мегалопы, прекращение процесса развития ускорялось с повышением концентрации ртути. Результаты опытов показали, что токсичность ртути повышается с возрастом личинок.

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