scholarly journals Genetic influence of the dam isolations in the Kamo and Nakayama River systems on the common fresh water goby populations Rhinogobius spp.

2012 ◽  
Vol 15 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Motohiro TAKAGI ◽  
Ippei SEKIYA ◽  
Ryohei SHIBAKAWA ◽  
Takaaki SHIMIZU ◽  
Ryota KAWANISHI ◽  
...  
Keyword(s):  
Fresh Water ◽  
Genetic Influence ◽  
River Systems ◽  
The Common

EVALUATION OF PTYCHOBOTHRIDEAN CESTODES USING RANDOM AMPLIFIED POLYMORPHIC DNA (RAPD) MARKERS FROM FRESH WATER FISHES IN GODAVARI BASIN (M.S.) INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
SUNITA BORDE ◽  
ASAWARI FARTADE ◽  
AMOL THOSAR ◽  
RAHUL KHAWAL
Keyword(s):  
Fresh Water ◽  
Rapd Markers ◽  
Random Amplified Polymorphic Dna ◽  
Band Pattern ◽  
Genomic Variation ◽  
Polymorphic Band ◽  
Rapd Profile ◽  
Band Size ◽  
Pcr Product ◽  
The Common

Ptychobothridean genera like Senga and Circumoncobothrium are the common parasites of fresh water fishes. The genotypic study of these parasites was taken by RAPD. The RAPD profile of these two parasites were not similar to each other as depicted by the band pattern in picture. These results suggest the presence of inter-specific polymorphism among cestode parasites of two different genera for RAPD analysis. The present study demonstrated that genetic differentiation of cestode parasites could be accomplished on the basis of genomic variation with polymorphic band pattern using RAPD. All the detected bands (PCR product) were polymorphic and band size ranged from 500-5000 bp in length. The RAPD of profiles using GBO-31, GBO-32, GBO-33, GBO-34, GBO-35 and GBO-36. Primers were able to characterize inter-specific polymorphism among the two genus ( Senga and Circumoncobothrium ). Genetic analysis suggests that Senga and Circumoncobothrium show genetic diversity with respect to RAPD patterns using all the six primers used for the present study. The genetic distance between the analyzed genuses ranged from 0.14 to 0.80. The differentiation of the two parasites on the basis of genetic markers could greatly facilitate study on the biology of these parasites.

2. Communication relative to the Fresh-Water Limestone of Burdiehouse, near Edinburgh, belonging to the Carboniferous Group of Rocks

1845 ◽  
Vol 1 ◽  
pp. 33-35 ◽  
Author(s):  
Hibbert
Keyword(s):  
Fresh Water ◽  
Marine Origin ◽  
North East ◽  
South West ◽  
Water Origin ◽  
The Common ◽  
Firth Of Forth ◽  
Carboniferous Limestone

In his paper, the author explains that the limestone in question, which is confounded with the common carboniferous or mountain limestone of marine origin, is, in his opinion, of fresh-water origin.On an irregular line extending from Joppa on the coast of the Firth of Forth, in a south and south-west direction to the Pentland Hills, strata of mountain or carboniferous limestone crop out at intervals; and their marine origin is indicated by encrinites, the Productus, &c., and corallines. This limestone is developed with least interruption between Edmonstone and Muirhouse, where it is from twelve to twenty feet thick. At this part of the line may be seen fractures and elevations of the strata of limestone and superincumbent shale and sandstone, evidently occasioned by a sudden and violent uplifting force acting from north-east to south-west, and causing the uplifted strata to dip south-east at an angle of 25°. These uplifted beds, between Edmonstone and Muirhouse, and subsequently to Burdiehouse, form the strata which dip under the coalmeasures of Gilmerton, Loanhead, and other sites.

IX. On the life-history of spirillum

1878 ◽  
Vol 27 (185-189) ◽  
pp. 481-485
Keyword(s):  
Life History ◽  
Fresh Water ◽  
Physiological Laboratory ◽  
University College ◽  
History Of ◽  
The Common

Notwithstanding the numerous and fruitful researches which have been recently made into the life-history of Bacteria, our knowledge of the common and interesting curved and spiral forms— the Vibrio and Spirillum of Ehrenberg—has made little or no advance since his time, neither embryonic nor reproductive forms having ever been observed; while even the zooglœa phase, so characteristic of Bacterium and Bacillus, has only once been mentioned, and then in a different form. A fresh-water aquarium, which has been stagnating since last summer in the Physiological Laboratory of University College, con­tained in winter vast numbers of ordinary motile Spirillum. On recently re-examining the water, one zooglœa film after another having in the meantime formed on the surface, thickened, broken, and sunk, we found that these motile forms had almost disappeared, while the films consisted almost entirely of resting Spirillum in a gelatinous-looking matrix, similar to that of Bacterium and Bacillus . Among these were two or three apparently distinct kinds of filaments, some resting and colourless, others motile, and filled with highly refracting bright yellowish-brown spheres. Such a field is represented in fig. 1.

scholarly journals Notes on the Marine Oligochæta of Plymouth

1889 ◽  
Vol 1 (1) ◽  
pp. 69-71 ◽  
Author(s):  
Frank E. Beddard
Keyword(s):  
Fresh Water ◽  
Lumbricus Terrestris ◽  
The Other ◽  
Red River ◽  
Other Hand ◽  
The Common ◽  
Marine Oligochaeta ◽  
The One

The Oligochæta form a division of the Annelida, of which the most familiar type is the common earthworm (Lumbricus terrestris); the group comprises also a great number of smaller worms, which are for the most part inhabitants of ponds and streams, such as the red River worm (Tubifex rivulorum). The Oligochæta were at one time believed to be entirely terrestrial or inhabitants of fresh water, and to be distinguished thus from the Polychæta, which were supposed to be exclusively marine in their habitat. Although the progress of research has not broken down the structural distinctions between these two divisions of the Annelida chætopoda, it has been provedthat no absolute line of demarcation can be drawn between the Oligochæta and the Polychæta as regards their habitat; on the one hand Polychæta have been found in fresh water, and, on the other hand, certain species of Oligochæta are now known to inhabit the mud and gravel of the seashore.

scholarly journals The Relevance of deep ecological principles in Aquatic Crisis: A philosophical Analysis

2020 ◽  
Vol 11 (2) ◽  
pp. 35-41
Author(s):  
Osebor Ikechukwu Monday
Keyword(s):  
Water Pollution ◽  
Fresh Water ◽  
Human Activities ◽  
Mass Extinction ◽  
Common Good ◽  
Aquatic Organisms ◽  
Philosophical Analysis ◽  
Policy Makers ◽  
Ecological Principles ◽  
The Common

Ethics is a branch of philosophy that analyzes right or wrong of an action.  Ethics studies all aspect of human activities; which water pollution is one.  Water pollution is the emission of waste or chemicals into water bodies at a quantity that is harmful to man and the aquatic organisms.  The Effects of water pollution include mass extinction species, decrease in the biodiversity, and scarcity of fresh water. The question to ask is “how can   water pollution be ameliorated if not totally eradicated?” Using the method of philosophical analysis, the paper suggests that the implementation of deep ecological principles by policy makers would be abatements and environmental consciousness for the common good of the society.

scholarly journals The Croonian Lecture for 1826

1833 ◽  
Vol 2 ◽  
pp. 301-302
Keyword(s):  
Fresh Water ◽  
The Subject ◽  
The Common

The author states the subject of this lecture to be, “an inquiry into the mode by which the propagation of the species is carried on in the common oyster, and the large fresh-water muscle.” After noticing the agreement of these animals, in the circumstance of their ova becoming the nuclei on which pearls are formed, he observes that they disagree in the process gone through before the young is completely formed. The mode of propagation of the oyster he regards as more simple than that of many plants; and the processes, as gone through in much shorter time.

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