Limnology

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Antibiotic resistance of fecal indicator bacteria from fishponds and nearby water sources in the Ayeyarwady Delta region of Myanmar
Limnology - Tập 22 Số 3 - Trang 357-362 - 2021
Ko, Shane Htet, Anal, Anil Kumar, Sakai, Hiroshi
Antibiotics are widely used for disease prevention in animal husbandry, including on chicken, cow and pig farms. Manure from farm animals can be used as fish food, especially in small-scale fish farming. Antibiotic residues and bacteria from the manure may spread to the fishpond water, which can lead to the emergence of antibiotic-resistant waterborne pathogens. This study focused on the antibioti...... hiện toàn bộ
Assessing the biomass and distribution of submerged aquatic vegetation using multibeam echo sounding in Lake Towada, Japan
Limnology - Tập 14 - Trang 39-42 - 2012
Kazuki Abukawa, Masumi Yamamuro, Zaal Kikvidze, Akira Asada, Chunhui Xu, Kenichi Sugimoto
Here we report on an advanced survey system that combines multibeam echo sounding with underwater photography, which was used to collect accurate data on the distribution and abundance of submerged aquatic vegetation (SAV) in Lake Towada. The use of this system enabled us to visualize the cover, height, and biomass of the SAV over the lake bottom, as well as to distinguish between different compon...... hiện toàn bộ
Grazing on toxic and non-toxic Microcystis aeruginosa PCC7820 by Unio douglasiae and Corbicula fluminea
Limnology - Tập 10 - Trang 1-5 - 2008
Ying Liu, Ping Xie, Xiao-Ping Wu
To explore the potential grazing effects of mussels on Microcystis aeruginosa, a common bloom-forming phytoplankton, Unio douglasiae and Corbicula fluminea were fed with Scenedesmus obliquus, toxic and non-toxic strains of Microcystis aeruginosa as single food and as mixtures in the laboratory. When fed with single foods, U. douglasiae has similar clearance rates on the three algae populations, wh...... hiện toàn bộ
Observation of anoxic water mass in a tropical reservoir: the Cirata Reservoir in Java, Indonesia
Limnology - Tập 9 - Trang 81-87 - 2008
Yuichi Hayami, Koji Ohmori, Kenji Yoshino, Yudhi S. Garno
We conducted a transect survey of water quality and bottom sediments in a large tropical reservoir, the Cirata Reservoir, located on the Citarum River, West Java, Indonesia. In the main basin of this reservoir, the surface water contained high concentrations of chlorophyll a, up to 48 μg l−1, and most of the water body was occupied by thick anoxic water. The thickness of the surface oxygenated wat...... hiện toàn bộ
Genetic diversity of the submerged macrophyte Hydrilla verticillata (L. f.) Royle in a river system in Japan
Limnology - Tập 1 - Trang 27-31 - 2000
T. Nakamura, Y. Kadono
The genetic diversity of Hydrilla verticillata was studied in the Kako River system, Hyogo Prefecture, southwestern Japan, including some of its tributaries. Sex expression (monoecy or dioecy), ploidy level (diploid or triploid), and isoenzyme phenotypes were investigated for plant samples collected from 51 sites along the water course. Monoecious plants occurred at 10 sites and dioecious plants ...... hiện toàn bộ
Horizontal variability and regulation of bacterial production in Lake Biwa, Japan
Limnology - Tập 23 Số 1 - Trang 231-243 - 2022
Kenji Tsuchiya, Noriko Tomioka, Kazuhiro Komatsu, Tomoharu Sano, Ayato Kohzu, Akio Imai, Kazuhide Hayakawa, Takamaru Nagata, Takahiro Okamoto, Tomoyuki Ohara
Grazing impact on the cyanobacterium Microcystis aeruginosa by the heterotrophic flagellate Collodictyon triciliatum in an experimental pond
Limnology - Tập 14 - Trang 43-49 - 2012
Yuki Kobayashi, Yoshikuni Hodoki, Kako Ohbayashi, Noboru Okuda, Shin-ichi Nakano
We estimated the grazing impact of the heterotrophic flagellate Collodictyon triciliatum on the harmful, bloom-forming cyanobacterium Microcystis aeruginosa in an experimental pond during a Microcystis bloom from summer to winter in 2010. For these experiments, we calculated the grazing rates from the digestion rate of C. triciliatum and its food vacuole contents. During the study period, M. aerug...... hiện toàn bộ
Invasive pest spreads beyond the last frontier: Corbicula clam in the Chubut River, Patagonia
Limnology - Tập 24 Số 1 - Trang 1-8 - 2023
Berenice Trovant, Javier Signorelli, Nicolás Battini
Distribution of polychlorinated biphenyls (PCBs), lead, and cadmium in Manko Tidal Flat, Okinawa
Limnology - Tập 5 - Trang 177-183 - 2004
Yutaka Tashiro, Kaneshi Takahira, Hidemi Osada, Haruhiko Fujii, Akira Tokuyama
Concentrations of polychlorinated biphenyls (PCBs), Pb, and Cd in sediment samples from the Manko Tidal Flat, an important area for migratory birds in Okinawa, were analyzed. High concentrations of PCBs were detected in the sediment samples from sites under a bridge at the end of the Manko Flat, whereas Pb and Cd concentrations did not indicate specific pollution. The spatial distribution and homo...... hiện toàn bộ
Benthic diatom and macroinvertebrate assemblages, a key for evaluation of river health and pollution in the Shahrood River, Iran
Limnology - Tập 17 - Trang 95-109 - 2015
Moslem Sharifinia, Abbas Mahmoudifard, Kamyab Gholami, Javid Imanpour Namin, Zohreh Ramezanpour
The pre sent study analyzed the relationships of two different biological assemblages (diatom and macroinvertebrate) when they are used to characterize a set of stations (from reference stations to impacted stations) within the Shahrood River. In particular, we examined the issue of concordance among these assemblages and the physicochemical parameters detected, using both multivariate and multime...... hiện toàn bộ
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