scholarly journals Distribution and Diversity of Oligochaetes in Selected Ponds of Thiruvananthapuram District, Kerala, South India

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
M. S. Ragi ◽  
D. S. Jaya
Keyword(s):  
Fresh Water ◽  
South India ◽  
Tubifex Tubifex ◽  
Sediment Samples ◽  
Limnodrilus Hoffmeisteri ◽  
Pollution Indicator ◽  
Dero Digitata

The present study was carried out to evaluate the distribution and diversity of oligochaete fauna in selected ponds of Thiruvananthapuram district in Kerala, South India. The sediment samples were collected from three ponds seasonally during the period December 2006 to November 2008. In the study, 10 oligochaete species which belong to 8 genera were identified in three selected ponds. These include Dero digitata, Dero nivea, Dero obtusa, Pristina longiseta, Aulophorus furcatus, Stylaria fossularis, Chaetogaster spp., Aeolosoma spp., Tubifex tubifex and Limnodrilus hoffmeisteri. Tubifex tubifex and Limnodrilus hoffmeisteri are the pollution-indicator oligochaete species identified in the fresh water ponds, which reveals that the studied ponds are subjected to pollution.

Studies on the fresh-water Oligochaeta of South India

Hydrobiologia ◽  
1965 ◽  
Vol 26 (3-4) ◽  
pp. 463-483 ◽  
Author(s):  
K. Vanamala Naidu
Keyword(s):  
Fresh Water ◽  
South India

scholarly journals Checklist of Aquatic Oligochaetes Species in Tigris–Euphrates River basin

2014 ◽  
Vol 11 (3) ◽  
pp. 1397-1404 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Single Species ◽  
Abundant Species ◽  
Tubifex Tubifex ◽  
Euphrates River ◽  
Tigris River ◽  
Limnodrilus Hoffmeisteri ◽  
Frequent Species ◽  
Aquatic Oligochaetes ◽  
Stylaria Lacustris ◽  
Tubificid Worms

A total of 60 species of aquatic oligochaetes were identified in different sites within Tigris-Euphrates basin / Iraq, including River Tigris, River Euphrates, Southern marshes ( Al-Haweiza , Al-Hammar and Al-Chebaiesh ) , Shutt Al-Germa, and Shatt Al-Arab. In River Euphrates 39 species were identified, 40 species from River Tigris and 32 species from Shatt-Al-Arab and southern marshes.The identified species were classified as four species of Family Aeolosomatidae, 54 species of Naididae ( 31 Naidinae , 8 Pristininae and 15 Tubificid worms), one species of each of Lumbriculidae ( Lumbriculus variegates ) and Lumbricidae ( Eiseiella tetraedra). Among Aeolosomatidae , Aelosoma aquaternarium, A. Liedyi, A. variegatum and A. hemprichi, in which, A. variegatum was the most frequent species, found in Euphrates river. Naidinae community were represented by five species of genus Chaetogaster, two species of each of Paranais, Slavina, & Stylaria, four species of Allonais , and seven species of each of Dero and Nais, in addition to Stephensoniana trivandrana, Specaria josinae and Ophidonais serpentina. Nais variabilis was the most abundant and frequent species in River Tigris while Stylaria lacustris & Ophidonais serpentina are abundant in River Euphrates . Species of Pristininae were representative by four species of genus Pristina and three species of genus pristinella, among them Priatina longiseta is the most abundant species.Tubificid worms, Branchuira sowerbyi and Limnodrilus hoffmeisteri were the most frequent and abundant species in the surface sediments of Iraqi waters. Beside L. hoffmeisteri , other five species of Limnodrilus, two species of Potomothrix, and a single species of Tubifex tubifex , Embolocephalus velutinus, Aulodrilus piguetia, Psammoryctides moravicus and Rhyacodrilus coccineus were recorded.

scholarly journals Utilizing GRACE and GLDAS data for estimating groundwater storage variability over the Krishna Basin

2018 ◽  
Vol IV-5 ◽  
pp. 129-136 ◽  
Author(s):  
A. S. Nair ◽  
J. Indu
Keyword(s):  
Fresh Water ◽  
South India ◽  
Water Security ◽  
Primary Reason ◽  
Wet Season ◽  
Groundwater Storage ◽  
Groundwater Balance ◽  
Human Needs ◽  
Irrigation Projects ◽  
Krishna Basin

<p><strong>Abstract.</strong> Groundwater is utilized intensively as a source of fresh water for irrigation and human needs. Hence, it is necessary to monitor groundwater storage for water security of the region in the future. The present study aims to evaluate the groundwater resource over the Krishna basin in South India. The basin comprises of 210 major and medium irrigation projects, which makes it important to evaluate the groundwater balance for a sustainable groundwater draft. This study evaluates the trend in groundwater anomaly derived from GRACE mascon product. Results indicate that the Krishna basin is subjected to a strong decline in groundwater at a rate of 0.34<span class="thinspace"></span>cm per year. Further, the study explores the seasonality of precipitation and its effect on groundwater by adopting an entropy-based approach. Results indicate the combined effect of delay in precipitation to attain peak and reduced duration of the wet season as a primary reason for the decline in the groundwater storage. The result shows that the reduction in groundwater storage affects the evapotranspiration over the region.</p>

scholarly journals Bopyrid isopods parasitizing on the cultured fresh water prawn, Macrobrachium malcolmsonii in South India

2016 ◽  
Vol 41 (1) ◽  
pp. 93-96 ◽  
Author(s):  
A. Gopalakrishnan ◽  
K. Raja ◽  
J. P. Trilles ◽  
M. Rajkumar ◽  
M. M. Rahman ◽  
...  
Keyword(s):  
Fresh Water ◽  
South India ◽  
Macrobrachium Malcolmsonii

scholarly journals Preliminary survey of aquatic oligochaetes in Eastern Tamil Nadu, India

Zoosymposia ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 14-23 ◽  
Author(s):  
MOHAMMED IBRAHIM NAVEED ◽  
S. THULASIRAJA ◽  
S. KARUNAKARAN ◽  
C. KULANDAIVEL ◽  
R. TAMIL SELVAN
Keyword(s):  
Tamil Nadu ◽  
Aquatic Vegetation ◽  
Preliminary Survey ◽  
Aquatic Habitats ◽  
Branchiura Sowerbyi ◽  
Limnodrilus Hoffmeisteri ◽  
Aquatic Oligochaetes ◽  
The Family ◽  
Dero Digitata ◽  
Random Survey

A random survey of aquatic Oligochaeta was conducted in Chennai, Villupuram, Dindugal, Thiruvallur, and Sivagangai districts of Tamil Nadu from November 2010 to March 2012. Thirteen taxa were identified from a total of 644 aquatic oligochaetes examined from various qualitative samples of aquatic vegetation and sediments. Chennai district had 3 families: Naididae, Pristinidae and Tubificidae along with a polychaete. The naidids were most diverse with 5 species: Branchiodrilus semperi, Aulophorus furcatus, Dero digitata, Dero indica and Dero zeylanica, the pristinids were represented by Pristina brevichaeta and Pristina jenkinae and the tubificids by 2 species, Branchiura sowerbyi and Limnodrilus hoffmeisteri. The nine aquatic oligochaetes collected from Chennai were already reported from this region. Two naidids, Branchiodrilus semperi and D. indica, along with the tubificid Branchiura sowerbyi, were collected from Villupuram district and they constitute the first reports for that district. Limnodrilus udekemianus from Kodaikanal, Dindugal district constitutes the first report for that region of Tamil Nadu. Megadriles belonging to the family Octochaetidae (Dichogaster bolaui?) and unidentified Megascolecidae collected from Thiruvallur and Sivaganga districts respectively were found to occur in aquatic habitats.

Factors Mediating Interspecific Aggregation of Tubificid Oligochaetes

1974 ◽  
Vol 31 (4) ◽  
pp. 460-462 ◽  
Author(s):  
R. O. Brinkhurst
Keyword(s):  
Normal Distribution ◽  
Tubifex Tubifex ◽  
Control Sediment ◽  
Limnodrilus Hoffmeisteri ◽  
Isolated Species

Tubifex tubifex and Limnodrilus hoffmeisteri are both attracted to the feces of T. tubifex rather than to those of L. hoffmeisteri or a control sediment. This substantiates the hypothesis that lowered respiration and increased growth caused by mixing the two species could be due to an increase in time spent burrowing, rather than feeding, when isolated species are removed from their preferred food, the feces of another species of worm. It also helps explain the inter- and intraspecific clumping that characterizes their normal distribution.

The ecology of some British rivers in relation to warm water discharges from power stations

1972 ◽  
Vol 180 (1061) ◽  
pp. 407-419 ◽  
Keyword(s):  
Temperature Fluctuations ◽  
Fish Populations ◽  
Warm Water ◽  
Tubifex Tubifex ◽  
Invertebrate Fauna ◽  
Power Station ◽  
Temperature Range ◽  
Power Stations ◽  
Limnodrilus Hoffmeisteri ◽  
Natural Variations

A number of detailed studies of the effects of heated discharges from power stations on the temperature, chemistry and ecology of British rivers have been carried out since 1965. This paper deals mainly with the Rivers Severn and Trent. In the Severn, a relatively clean river, temperatures up to 28°C below Ironbridge Power Station outfalls have not affected the diversity of the invertebrate fauna. There were slight alterations in the hatching of insect nymphs which may have been attributable to temperature, though natural variations from year to year were much more obvious. Emergence of adult Ephemeroptera and Trichoptera was not affected by temperatures of 26 to 28°C. The River Trent is used for cooling by some 14 power stations. There are no obvious changes in the diversity of the invertebrate fauna which can be related to temperature, though pollution from other sources causes very marked changes. At Drakelow, in the most polluted reach, changes in the Oligochaete community were possibly attributable to temperatures below the outfall. Experiments showed that Limnodrilus hoffmeisteri had a wider temperature range for reproduction than Tubifex tubifex . Studies of fish populations at Peterborough have shown that many coarse fishes can withstand quite sudden and wide temperature fluctuations.

Evidence of Interspecific Interactions in the Respiration of Tubificid Oligochaetes

1973 ◽  
Vol 30 (5) ◽  
pp. 617-622 ◽  
Author(s):  
K. E. Chua ◽  
R. O. Brinkhurst
Keyword(s):  
Pure Culture ◽  
Interspecific Interactions ◽  
Tubifex Tubifex ◽  
Mixed Species ◽  
Limnodrilus Hoffmeisteri ◽  
The One

Determination of respiration of Tubifex tubifex, Limnodrilus hoffmeisteri, and Peloscolex multisetosus in the laboratory provided evidence of interspecific interactions between two tubificid species. The same individuals in mixed species culture respire significantly less than in pure culture. The effector of the interaction in the one interaction between T. tubifex and L. hoffmeisteri is waterborne, smaller than 0.45 μ, and it is rendered ineffective by heating at 60 C for 20 min.

Effects of Tubificid Worms on Denitrification and Nitrification in Stream Sediment

1980 ◽  
Vol 37 (4) ◽  
pp. 656-663 ◽  
Author(s):  
Lakeram Chatarpaul ◽  
John B. Robinson ◽  
Narinder K. Kaushik
Keyword(s):  
Organic Matter ◽  
Nitrogen Cycling ◽  
Stream Sediment ◽  
Tubifex Tubifex ◽  
Gut Contents ◽  
Distilled Water ◽  
Nitrate N ◽  
Limnodrilus Hoffmeisteri ◽  
Transformation Processes ◽  
Tubificid Worms

Labeled nitrate-N in the form of K15NO3 was used to determine the effects of the tubificid oligochaetes, Tubifex tubifex and Limnodrilus hoffmeisteri, on the N transformation processes in stream sediment contained in laboratory columns. Denitrification and nitrification occurred simultaneously and were enhanced significantly in the presence of the worms. The denitrification rate over 48 d at 15 °C in the sediment that contained the worms was 90 mg N/m2∙d−1; the simultaneous rate of nitrification was 69 mg N/m2∙d−1. The corresponding rates for denitrification and nitrification in sediment without worms were 50 mg N/m2∙d−1 and 29 mg N/m2∙d−1. The rate of CO2 evolution from sediment containing worms and overlain with nitrate-N solution was about 21% greater than that of sediment with worms overlain with distilled water. It was concluded from experiments using chloride as tracer that denitrification could be enhanced by the worms at least in part as a result of accelerated movement of nitrate-N into the sediment. However, when a column of glass beads was used as substrate for worms, and with no organic matter present, the concentration of nitrate in an overlying solution declined at an appreciable rate. This suggested that denitrification occurred in or on the worms, a possibility supported by the observation that denitrifying bacteria could be isolated from both the exterior and the gut contents of the worms.Key words: tubificid worms, stream nutrient cycling, denitrification, nitrogen cycling

Sign in / Sign up

Export Citation Format

Share Document