The Shell Features ofCornu aspersum(SynonymHelix aspersa) andHelix pomatia: Characteristics and Comparison

Ligaszewski, Maciej; Surówka, Krzysztof; Stekla, Julia

doi:10.4003/006.027.0215

Cited by 9 publications

(9 citation statements)

References 14 publications

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“…It is also possible that natural populations of the two subspecies have evolved in areas with different characteristics of their local geomagnetic fields as a result of different geological structure of the bedrock, but this conjecture requires further studies. The differences in the response to the experimental conditions could also be affected by the fact that farmed H. aspersa aspersa reach maturity on average by 4-5 weeks earlier than H. aspersa maxima, as well as by the differences in some shell characters, depending on microclimatic conditions (LIGASZEWSKI et al 2009). The results indicate that adult H. aspersa maxima react to the parameters of experimental fields more strongly than H. aspersa aspersa.…”

Section: Discussionmentioning

confidence: 99%

The effect of magnetic field on farmed populations of Helix aspersa O. F. Müller, 1774

Ligaszewski¹,

Łysak²,

Janas³

et al. 2011

Folia Malacologica

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In order to assess the effect of alternating electromagnetic and direct magnetic field on adult Helix aspersa O. F. Müller and their eggs, adults and eggs of H. aspersa maxima Taylor and H. aspersa aspersa O. F. Müller were exposed to such fields with different parameters, and the following life cycle traits were observed: condition of hibernating adults, their survival rate during hibernation and reproduction, egg mass, hatching success, growth rate of hatchlings and body mass of next generation adults. Adults were exposed to sinusoidal, alternating electromagnetic fields of 50 Hz, 100 Hz and 200 µT, and magnetic induction of 50 Hz, as well as a field of 175 µT and 10-1000 Hz (repetition period 80 minutes). Egg batches were exposed to direct magnetic fields of magnetic induction 5 µT and 10 µT and alternating electromagnetic fields of analogous induction and frequency of 50 Hz. The effects varied depending on the parameters of the fields, subspecies and life cycle stage. Adult H. aspersa maxima was more sensitive to the changes in characteristics of electromagnetic field than H. aspersa aspersa, but the two subspecies showed a similar reaction to exposing their eggs to direct or alternating magnetic field. Probably direct field had a greater selection effect compared to alternating field, removing weaker genotypes at embryonic stage; this resulted in a greater mean body mass of the next generation adults. The results are preliminary; further studies, with further modifications of parameters of the fields applied are necessary.

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Section: Discussionmentioning

confidence: 99%

The effect of magnetic field on farmed populations of Helix aspersa O. F. Müller, 1774

Ligaszewski¹,

Łysak²,

Janas³

et al. 2011

Folia Malacologica

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“…Also, shell measurements were taken to establish the shell shape index-shell width-to-height ratio [96] and solidity index. This method is based on one used on poultry eggs [97], previously used in snail shell estimation by Ligaszewski et al [98]. The formula follows [shell weight × (height width) −1 ] × 100.…”

Section: Experimental and Analytical Proceduresmentioning

confidence: 99%

Effect of Different Levels of Calcium and Addition of Magnesium in the Diet on Garden Snails’ (Cornu aspersum) Condition, Production, and Nutritional Parameters

Rygało-Galewska,

Zglińska,

Roguski

et al. 2023

Agriculture

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Edible snails are an attractive protein source due to their high growth rate, cost-efficiency, and nutritional value. Calcium is crucial for snail growth, reproduction, and shell formation, while magnesium plays a role in enzyme function and muscle tone. This study aimed to optimise calcium and magnesium levels in Cornu aspersum diets to optimise the production and technological characteristics of the derived animal products. Snails were fed specific diets in controlled conditions with varying calcium and magnesium levels (44.3, 66.1, 88.7, 103.5 Ca g/kg feed and 3.3, 5.6, 7.2 Mg g/kg feed) for four months. Their growth, shell characteristics, and meat composition were evaluated. As calcium in the feed increased, carcass and shell weights were higher. Also, the crushing force of the shells was higher with increasing amount of calcium in the feed. In the group with 10.35% calcium and 0.72% magnesium, snail growth significantly slowed down after three months, with lower mortality. It is suggested that a shortened fattening cycle by 3–4 weeks compared to the magnesium-free diet is possible. However, based on meat, shell, mortality, and feed intake analysis, a 0.56% magnesium concentration in the feed seems to give better results, as magnesium content at 0.72% might be toxic to snails. Further investigation is to confirm the possibility of neutralising the negative effects of magnesium in the diet through increasing calcium and phosphorus intake.

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“…Calcium aluminate is synthesized principally from the CaO and Al 2 O 3 (Andrade et al, 2014;Yongpan et al, 2016;Iftekhar et al, 2008;Wieczorek-Ciurowa et al, 2010;Lourençoa et al, 2013;Zawrah and Khalil, 2007), but in some cases, the CaO is obtained through the thermic effect from CaCO 3 (Miranda Hernández et al, 2018;Andrade et al, 2014;Iftekhar et al, 2008;Galan et al, 2013). Also, CaCO 3 can be obtained from natural sources such as snail shells, egg shells or clam shells (Miranda Hernández et al, 2018;Singh and https://doi.org/10.1016/j.jmbbm.2019.05.041 Received 18 January 2019; Accepted 27 May 2019 Purohit, 2010;Viriya et al, 1016;Ligaszewski et al, 2009;White et al, 2007;Marxen et al, 2003;Niju et al, 2016). Microstructure and mechanical properties of the calcium aluminate CaO•Al 2 O 3 were studied in our previous work.…”

Section: Introductionmentioning

confidence: 99%

Physical, mechanical properties and antimicrobial analysis of a novel CaO·Al2O3 compound reinforced with Al or Ag particles

Saravia

Rastelli

Ortega-Avilés

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

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Ceramic-metal (CaO•Al 2 O 3-Al and CaO•Al 2 O 3-Ag) compounds were prepared by mechanical milling and consolidated through an in-situ sintering process. The aim of this work is to study the effects of the Al and Ag particles to ceramic-base compound, primarily in the microstructure, and its mechanical and antimicrobial properties. Chemical systems with a 1:1 M ratio between CaCO 3 and Al 2 O 3 powder were formed, with the addition of 10 wt% Al or 10 wt% Ag, respectively. The compound material that consolidated were microstructurally characterized through X-ray diffraction, scanning electron microscopy, optic microscopy, and X-ray computed tomography. In addition, the hardness, the fracture toughness, the transversal elastic modulus, and the antimicrobial property were evaluated. The results of X-ray diffraction identified the formation of the calcium aluminate phases, such as CaO•6Al 2 O 3 (hibonite:CA6), CaO•2Al 2 O 3 (grossite:CA2), and CaO•Al 2 O 3 (krotite:CA); as well as Al and Ag were identified in its respective system. In addition, the mechanical properties show changes compared to the reference material that was synthesized under the same conditions and, finally, these materials also have an antimicrobial effect, against the Staphylococcus bacterium that is common in the oral cavity, when studied in synthetic saliva.

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The Shell Features ofCornu aspersum(SynonymHelix aspersa) andHelix pomatia: Characteristics and Comparison

Cited by 9 publications

References 14 publications

The effect of magnetic field on farmed populations of <i>Helix aspersa</i> O. F. Müller, 1774

The effect of magnetic field on farmed populations of <i>Helix aspersa</i> O. F. Müller, 1774

Effect of Different Levels of Calcium and Addition of Magnesium in the Diet on Garden Snails’ (Cornu aspersum) Condition, Production, and Nutritional Parameters

Physical, mechanical properties and antimicrobial analysis of a novel CaO·Al2O3 compound reinforced with Al or Ag particles

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