Biological and Ecological Studies on Land Snails and Their Control

Sallam, Ahmed; El-Wakeil, Nabil

doi:10.5772/29701

Cited by 14 publications

(8 citation statements)

References 30 publications

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“…The repeated isolation of once linked forest patches may have contributed to rapid diversification and increased narrow endemism [ 82 ], also leaving ancient Gondwanan geographical relicts in isolated forest patches due to the relative stability in climate within them [ 13 , 34 , 83 ]. The role of ecological stability of forest habitats in promoting radiation of relictual taxa has been recognised [ 84 ], while this phenomenon has also been documented for land snails in forest refugia along the Albertine rift valley of Africa [ 85 ], which can be attributed to the ecophysiology of land snails, including their preference for habitats with high micro-habitat complexity, high humidity, low temperature and damp soil with decaying organic matter [ 86 – 88 ].…”

Section: Discussionmentioning

confidence: 99%

Land snail biogeography and endemism in south-eastern Africa: Implications for the Maputaland-Pondoland-Albany biodiversity hotspot

et al. 2021

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Invertebrates in general have long been underrepresented in studies on biodiversity, biogeography and conservation. Boundaries of biodiversity hotspots are often delimited intuitively based on floristic endemism and have seldom been empirically tested using actual species distributions, and especially invertebrates. Here we analyse the zoogeography of terrestrial malacofauna from south-eastern Africa (SEA), proposing the first mollusc-based numerical regionalisation for the area. We also discuss patterns and centres of land snail endemism, thence assessing the importance and the delimitation of the Maputaland-Pondoland-Albany (MPA) biodiversity hotspot for their conservation. An incidence matrix compiled for relatively well-collected lineages of land snails and slugs (73 taxa in twelve genera) in 40 a priori operational geographic units was subjected to (a) phenetic agglomerative hierarchical clustering using unweighted pair-group method with arithmetic means (UPGMA), (b) parsimony analysis of endemicity (PAE) and biotic element analysis (BEA). Fulfilling the primary objective of our study, the UPGMA dendrogram provided a hierarchical regionalisation and identified five centres of molluscan endemism for SEA, while the PAE confirmed six areas of endemism, also supported by the BEA. The regionalisation recovers a zoogeographic province similar to the MPA hotspot, but with a conspicuous westward extension into Knysna (towards the Cape). The MPA province, centres and areas of endemism, biotic elements as well as the spatial patterns of species richness and endemism, support the MPA hotspot, but suggest further extensions resulting in a greater MPA region of land snail endemism (also with a northward extension into sky islands—Soutpansberg and Wolkberg), similar to that noted for vertebrates. The greater MPA region provides a more robustly defined region of conservation concern, with centres of endemism serving as local conservation priorities.

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Section: Discussionmentioning

confidence: 99%

Land snail biogeography and endemism in south-eastern Africa: Implications for the Maputaland-Pondoland-Albany biodiversity hotspot

et al. 2021

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“…These outcomes were supported by Godan (1983) published that the effectiveness of molluscicides against snails increases in a combination with other active ingredient. Similarly, Sallam and El-Wakeil (2012) reported that the combinations of salts with other different molluscicides in a bait formulation or by spraying represent an effective means for control exotic snails. Mixing of acetylsalicylic acid with methomyl was more effective against E. vermiculata and M. obstructa snails than the use of each compound individually (Kandil et al, 2014).…”

Section: Toxic Potency Of Binary Mixtures Against Snailsmentioning

confidence: 99%

Determination the Toxicity of some Organic Acids and Fertilizers against the Land Snail Eobania vermiculata

Ghareeb,

Abde-El-Haleem

2024

Journal of Plant Protection and Pathology

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The toxic influence of boric, salicylic and sulfonic organic acids and the ammonium hydroxide, copper sulfate, and urea as fertilizers were evaluated against the adult snails of Eobania vermiculata for 21 days by spraying technique under the laboratory conditions. Organic acids and fertilizers were decomposing in the soil accelerated than pesticides; four recommended concentrations (0.5, 1, 1.5 and 2%) were opted for each acid and fertilizer and selected as low concentrations to avoid any noxious impact against plants. Moreover, efficacy of the binary mixing of organic acids with fertilizers at LC25 against the adult snail individuals was also investigated. The utmost mean mortality of snails was remarked at the concentration of 2% of all tested compounds, which attained 52.00, 82.66 and 83.33% for boric, salicylic and sulfonic acids while it was 95.33, 94.00, and 50.00 for ammonium hydroxide, copper sulfate, and urea, consecutively. Based on LC50, the efficiency of tested compounds could be arranged in descending order sequentially to ammonium hydroxide, copper sulfate, sulfonic acid, salicylic acid, boric acid and urea. The binary mixture of sulfonic acid with urea and salicylic acid with ammonium hydroxide achieved the highest molluscicidal effect against snails in comparison with the other tested mixtures, accomplished 100% mortality of snails. On the contrary, the binary mixing of salicylic acid with copper sulfate achieved the lowest mean mortality which it was only 12.66%.

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“…Comm., 8 September 2016). Submerged/ emergent vegetation, floating plants, leaves and other litter were screened (Sallam and El-Wakeil, 2012). Rocks were hand-washed to dislodge the snails in a bucket (Bousset et al, 2004).…”

Section: Freshwater Snailmentioning

confidence: 99%

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2020

BJNRD

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Terrestrial and freshwater snails are adapted to specialised ecological niches with a low mobility. They are highly susceptible to environmental changes, rapid urbanisation and the associated development activities. Snail diversity in different habitats and response of snails to environmental variables were studied in south-central Bhutan. Terrestrial habitat was subdivided into undisturbed and disturbed category (Dekidling and Gelephu gewogs respectively) under Sarpang district. Snails were collected from 88 (44 plots each) random sampling quadrats (20 x 20 m) with subplots of 5 (1 x 1 m) each in the main plots. Sampling in freshwater (nine plots) was carried out in 100 m interval with 20 m stretch. A total of 4,477 individuals comprising of 35 snail species belonging to 11 families were collected. There was significant difference in species richness in all the habitat types (p < .05). Terrestrial and freshwater snail species richness, diversity, evenness and abundance had no significant correlation with biotic factors except altitude (r = .65)and vegetation cover (r = .65) had significant positive correlation to the indices. The undisturbed terrestrial habitat supports more of small-body snails with higher species richness. However, disturbed terrestrial habitat supports large-body snails with less species richness but with higher species abundances. Melanoides tuberculata and Tarebia lineata were rarely recorded in freshwater habitat indicating the needs for further studies in monsoon season.

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Biological and Ecological Studies on Land Snails and Their Control

Cited by 14 publications

References 30 publications

Land snail biogeography and endemism in south-eastern Africa: Implications for the Maputaland-Pondoland-Albany biodiversity hotspot

Land snail biogeography and endemism in south-eastern Africa: Implications for the Maputaland-Pondoland-Albany biodiversity hotspot

Determination the Toxicity of some Organic Acids and Fertilizers against the Land Snail Eobania vermiculata

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