Currently, the reproductive mode of Indonesian endemic species Corbicula tobae from Lake Toba is yet to be investigated. In this study, we describe, for first time, based on a series topotype specimens, combining anatomical and histological data. According our data, C. dioecious species, incubating D-shaped larvae in inner demibranchs having monoflagellate sperm. The head spermatozoon differs t...

Hydrochemical parameters of water in ecosystems Gijdivan district Bukhara region: O2 content 4,9 ± 0,5 mg / l, Cl2 312 14 mineralization - 992-1402 l and oil products about 0,6-0,8 it turned out that the amount these elements exceeds permissible norm. The following conclusions were made on basis study status species listed “Red Book” aquatic lower reaches Zarafshan river. We found population Co...

Average methylmercury levels in five Savannah River tributary streams, sampled 11 times over 2 years (0.170 ng/l), were nearly twice as high as in the Savannah River (0.085 ng/l). Total mercury levels in the tributaries (2.98 ng/l) did not differ significantly from the river (2.59 ng/l). All of the tributaries drained extensive wetlands that would be expected to support comparatively high rates...