ASSESSMENT OF THE STATE OF THE TERRESTRIAL ENVIRONMENT IN SKIKDA REGION (ALGERIA) USING ENZYMATIC ACTIVITY AND ENERGY RESERVE CONTENTS OF LAND SNAILS, CANTAREUS ASPERSUS

Cadmium is very hazardous pollutant with massive impact on aspects of everyday life. Little knowledge exists on kinetics of dietary cadmium retention in Cantareus aspersus for durations above three months although this species of land snails serves as excellent ecotoxicological model for studying cadmium hazard. Here was used a continuous 112-day exposure study design, in which test snails were exposed to a wide range of dietary cadmium levels, including human- and environmentally-relevant levels. Using Flame Atomic Absorption Spectrometry, cadmium levels in the hepatopancreas were found to increase significantly, and in dose-dependent manner starting from a dietary cadmium dose of 0.2 mg/kg dry weight. The results of the present study render the hepatopancreas of mature snails, C. aspersus, as excellent endpoints for assessing Cd toxicity over a broad range of concentrations. Hence, this species of land snails can be reliably used for both active and passive biomonitoring of environmental cadmium pollution.

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Phosphatase Activity of Drosophila Salivary Glands

Journal of Cell Science ◽

10.1242/jcs.s3-89.8.415 ◽

1948 ◽

Vol s3-89 (8) ◽

pp. 415-419

Author(s):

W. L. DOYLE

Keyword(s):

Acid Phosphatase ◽

Enzymatic Activity ◽

Quantitative Determination ◽

Salivary Glands ◽

Phosphatase Activity ◽

Acid Phosphatase Activity ◽

The State ◽

Staining Methods

The phosphatases in the cytoplasm and nuclei of Drosophila salivary glands are better preserved by fixation in absolute acetone than in 85 per cent, alcohol. In whole glands there is relatively little extraction of the enzyme during assay. Phosphatase activity is more resistant to incubation at neutrality than at pH 8.6, but in this material there is sufficient residual enzymatic activity to permit redetermination of alkaline, neutral, or acid phosphatase activity by staining methods after an initial quantitative determination. The state of the membranes of the gland affects the penetration of the substrate sufficiently to limit the activities obtained.

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Soil copper uptake by land snails: A semi-field experiment with juvenile Cantareus aspersus snails

Environmental Toxicology and Pharmacology ◽

10.1016/j.etap.2019.103243 ◽

2019 ◽

Vol 72 ◽

pp. 103243

Author(s):

George Andrei Drăghici ◽

Cristina Dehelean ◽

Iulia Pinzaru ◽

Despina Maria Bordean ◽

Aurica Borozan ◽

...

Keyword(s):

Field Experiment ◽

Land Snails ◽

Copper Uptake ◽

Cantareus Aspersus

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Fieldbook of Illinois land snails / by Frank Collins Baker. Printed by authority of the state of Illinois.

10.5962/bhl.title.15199 ◽

1939 ◽

Cited By ~ 1

Author(s):

Frank Collins Baker ◽

Keyword(s):

The State ◽

Land Snails

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Land snails and slugs of Bau limestone hills, Sarawak (Malaysia, Borneo), with the descriptions of 13 new species

ZooKeys ◽

10.3897/zookeys.1035.60843 ◽

2021 ◽

Vol 1035 ◽

pp. 1-113

Author(s):

Mohammad Effendi bin Marzuki ◽

Thor-Seng Liew ◽

Jayasilan Mohd-Azlan

Keyword(s):

New Species ◽

Random Sampling ◽

Land Snail ◽

The State ◽

Land Snails ◽

Snail Species ◽

Malaysian Borneo

This study presents a list of land snails and slugs found on limestone hills in the District of Bau, the state of Sarawak in Malaysian Borneo. Systematic and random sampling for land snails was conducted at eight limestone outcrops, namely, Gunung Stulang, Padang Pan, Gunung Kapor, Gunung Lobang Angin, Gunung Doya, Gunung Batu, Bukit Sekunyit and Gunung Sebayat. A total of 122 land snail species was documented with photographs of each species. Of the 122 species collected, 13 are new to science, namely, Acmella bauensissp. nov., Japonia bauensissp. nov., Plectostoma margaretchanaesp. nov., Microcystina arabiisp. nov., Microcystina atonisp. nov., Microcystina pariparisp. nov., Microcystina liratasp. nov., Microcystina oswaldbrakenisp. nov., Microcystina kilatsp. nov., Philalanka jambusanensissp. nov., Everettia microrhytidasp. nov., Everettia minutasp. nov., and Paralaoma sarawakensissp. nov.

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