Effect of environmental factors on the fecundity, hatchability and survival of snail Lymnaea (Radix) acuminata (Lamarck): vector of fascioliasis.

نویسندگان

  • Harsh Vardhan Jigyasu
  • Vinay Kumar Singh
چکیده

Lymnaea acuminata breeds round the year. The effect of pH, temperature, dissolved oxygen, carbon dioxide, light/dark period and clean/polluted water on the fecundity, hatchability and survival of young snails of L. acuminata were studied. It was observed that these environmental variant abiotic factors caused a significant variation in fecundity, hatchability and survival of young snails. Maximum reproduction of this snail was observed in the months of March to May. A significant positive correlation (p<0.05) between D.O. (3.1-7.7 ppm)/pH (7.01-8.96) of water with fecundity (6.0-196.33/20 snails), hatchability (54.69-96.91%) and survival (61.3-95.86%) of young snails was observed for each month and each interval of 24-72 h. In contrast, a significant negative correlation between dissolved CO2 (4.6-16.6 ppm)/temperature (16-37 degrees C) of water was noted with fecundity, hatchability and survival of snails. Percent hatchability in the eggs in different regimens of water was between 96.91-54.69%. The hatching period was prolonged (2-14 days) in snail exposed to different groups of water compared to the control group (2-9 d). This study conclusively shows that variant abiotic factors in different months of the year can significantly alter the reproductive ability and development process in the snail Lymnaea acuminata.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Effect of Uscharin on the Reproduction of the Snail Lymnaea Acuminata

Fascioliasis is a major cause of mortality and morbidity in the northern part of India. The causative organisms; Fasciola hepatica Linnaeus and Fasciola gigantica Cobbold spread via their vectors, the fresh water snails. Control of vector can help to control the disease. The snail Lymnaea acuminate breeds through out the year and the synthetic pesticides used to control the population of snail ...

متن کامل

Toxicological effect and biochemical alterations induced by different fractions of Euphorbia royleana latex in freshwater harmful vector snail Lymnaea acuminata.

Laboratory evaluation was made to assess the molluscicidal activity of different fractions of Euphorbia royleana (Family- Euphorbiaceae) latex obtained through sephadex gel column against freshwater snail Lymnaea (Radix) acuminata Lamarack. This snail is the vector of liver fluke, Fasciola hepatica Linnaeus and Fasciola gigantica Cobbold, which causes endemic fascioliasis in cattle and livestoc...

متن کامل

Chlorophyllin Bait Formulation and Exposure to Different Spectrum of Visible Light on the Reproduction of Infected/Uninfected Snail Lymnaea acuminata

Fasciolosis is a waterborne disease, caused by Fasciola species. Snail Lymnaea acuminata is an intermediate host of these flukes. Control of snail population is major tool in reducing the incidences. Variation in light intensity and wavelength caused significant changes in reproduction pattern of snails. Maximum fecundity was noted with bait containing carbohydrate (starch, 468 ± 0.10/20 snails...

متن کامل

A Comparative Study of Toxic Effect of a Euphorbia’s Plant Euphorbia tirucalli Against Two Freshwater Harmful Snails in Laboratory as Well as in Pond and its Effect on Their Reproductive Physiology

In the present study molluscicidal activity of methanol extract of stem bark of plant Euphorbia tirucalli (Family: Euphorbiaceae) against two freshwater harmful snails Lymnaea acuminata and Indoplanorbis exustus were evaluated in the laboratory as well as in the pond. Both snails are intermediate hosts of liver fluke, Fasciola hepatica and Fasciola gigantica, which causes endemic fascioliasis i...

متن کامل

EFFECTS OF SINGLE, BINARY AND TERTIARY COMBINATIONS WITH Jatropha gossypifolia AND OTHER PLANT-DERIVED MOLLUSCICIDES ON REPRODUCTION AND SURVIVAL OF THE SNAIL Lymnaea acuminata

The effect of sub-lethal doses (40% and 80% of LC(50)/24h) of plant derived molluscicides of singly, binary (1:1) and tertiary (1:1:1) combinations of the Rutin, Ellagic acid, Betulin and taraxerol with J. gossypifolia latex, leaf and stem bark powder extracts and their active component on the reproduction of freshwater snail Lymnaea acuminata have been studied. It was observed that the J. goss...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of water and health

دوره 8 1  شماره 

صفحات  -

تاریخ انتشار 2010