Ecology of the Land Snails Mesodon thyroidus and Allogona profunda

Blinn, W.

doi:10.2307/1932528

Cited by 26 publications

(7 citation statements)

References 8 publications

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“…In situ experiments on food preferences in a tropical rainforest are challenging because identifying leaf litter from plants is difficult, as plants are very species rich even within a small area, as was shown in this study (Crowther, 1982;Crowther, 1987a;Crowther, 1987b). We cannot rule out the hypothesis that plants and leaf litters provide shelter for land snails (e.g., Blinn, 1963;Pollard, 1975;Cowie, 1985;Standish, Bennett & Stringer, 2002;Burrell, Scott & Yen, 2007;Parkyn, Brooks & Newell, 2014).…”

Section: Association Between Snail Abundance and Abundance Of Plant Speciesmentioning

confidence: 80%

“…The capture-mark-recapture technique has been used for estimation of population size and density for land snails (Blinn, 1963;Hänsel, Walther & Plachter, 1999;Standish, Bennett & Stringer, 2002;Parkyn, Brooks & Newell, 2014). Previous studies on other land snails showed that the capture rate using the CMR technique can be very high, with up to an 85% recapture rate after one year (Kleewein, 1999).…”

Section: Spatial Distribution and Population Density Of P Elephasmentioning

confidence: 99%

“…Previous studies on the association between plants and specific land snail species have been conducted outside of the tropical regions (Blinn, 1963;Pollard, 1975;Cowie, 1985;Hänsel, Walther & Plachter, 1999;Standish, Bennett & Stringer, 2002;Burrell, Scott & Yen, 2007;Horsák, Škodová & Cernohorsky, 2011;Parkyn & Newell, 2013;Parkyn, Brooks & Newell, 2014). Most of these studies suggested that plants act as shelters for land snails (Blinn, 1963;Pollard, 1975;Cowie, 1985;Standish, Bennett & Stringer, 2002;Burrell, Scott & Yen, 2007;Parkyn, Brooks & Newell, 2014).…”

Section: Association Between Snail Abundance and Abundance Of Plant Speciesmentioning

confidence: 99%

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Distribution and abundance of the land snail Pollicaria elephas (Gastropoda: Pupinidae) in limestone habitats in Perak, Malaysia

Liew

Phung

Said³

et al. 2021

PeerJ

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This study aimed to reveal the habitat variables that determine the distribution and abundance of the land snail Pollicaria elephas in limestone habitats in Perak, Malaysia. Seventeen plots were selected on a limestone hill to determine the effect of environmental variables on the abundance of this land snail. The environmental variables we considered included habitat (canopy cover and leaf litter thickness), topography (elevation, aspect, ruggedness, and slope), microclimate (soil temperature, air temperature, and humidity), and vegetation (abundance of respective vascular plant species). The correlation analyses suggested that the snails’ abundance was positively correlated with the abundance of the four vascular plant species: Diospyros toposia var. toposoides, Croton cascarilloides, Kibatalia laurifolia, and Mallotus peltatus. Plots with lower soil temperatures had more snails than plots with higher soil temperatures. Our results show that plots in the southern part of the limestone hill, in which P. elephas were absent, were similar in habitat, topography, microclimate, and vegetation to the plots in the northern part of the limestone hill, where specimens were mostly present. The absence of this species in suitable habitats may be due to their low dispersal ability rather than adverse environmental conditions.

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Section: Association Between Snail Abundance and Abundance Of Plant Speciesmentioning

confidence: 80%

Section: Spatial Distribution and Population Density Of P Elephasmentioning

confidence: 99%

Section: Association Between Snail Abundance and Abundance Of Plant Speciesmentioning

confidence: 99%

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Distribution and abundance of the land snail Pollicaria elephas (Gastropoda: Pupinidae) in limestone habitats in Perak, Malaysia

Liew

Phung

Said³

et al. 2021

PeerJ

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“…Για τον υπολογισμό των nj και ÏÎJ + I χρησιμοποιήθηκαν τα εδομένα από τη δυναμική πληθυσμών. •a (Pollard, 1975), για το Mesodon thyroidus και την Allogona profunda (Blinn, 1963) καθώς και για την Allogena ptychophora (Carney, 1966 (Pollard, 1975). Η Α. profunda σχηματίζει επίσης σκληρό λευκό ασβεστιτικό επίφραγμα, αλλά διαχειμάζει σε μικρές κοιλότητες του εδάφους χωρίς να βρίσκεται μέσα στο χώμα (Blinn, 1963 (Pollard, 1975' Tishler, 1974' Blinn, 1963 ότι είναι οι κύριοι παράμετροι που ρυθμίζουν την κινητικότητα των ζώων αυτών, ενώ άλλοι συγγραφείς (Howes & Wells, 1934' Bailey, 1981…”

Section: γ δεντερογενήζ καραγφγή α) μέθοδοιunclassified

Συνεισφορα Στη Μελετη Της Οικοφυσιολογιας Του Γαστεροποδου Πνευμονοφορου Helix Lucorum L.

Στάικου¹

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C L 3 21 1% irffîffÎL 27 45 28.9.83 rfirrirT Πα Jfl κ-, 10 .JtdJ 10 27.10.83 3 2 ' %, 3 21 * 10.11.84 π 45 l ÎJhL•. 24 45 β % i-i Lhflhk. 45 MIL 10.11.83 β % JUL 24 45 Οι iMk_ 20 lui M ilk ΓΓΓ_ Ith-9 27 45 \:Ωοπό'9εση M _kk_ Juki Dmm 9 30 45 Εικ. 9. Ιστογράμματα συχνότητας μεγεθών κελύφους των πληθυσμών του Helix lucorum από τον Απρίλιο του 1983 ως τον Απρίλιο του 1986.

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“…Cepaea nemoralis is also most active during rain, especially when rain alternates with fine weather and conditions are warm and wet (Wolda and Kreulen 1973). Mesodon thyroidus held in enclosures in situ are predominantly nocturnal, but also crepuscular (Blinn 1963).…”

Section: Environmental Control Of Activity and Reproductionmentioning

confidence: 99%

Husbandry of the Carnivorous Land Snail, Powelliphanta augusta (Gastropoda: Pulmonata: Rhytdidae)

Allan¹

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<p>Key aspects of the captive husbandry of Powelliphanta augusta, a newly-described New Zealand land snail are investigated: how they should be managed and fed to provide individuals for release, and how a long-term captive population can be maintained as an insurance against extinction in the wild. This project arises from almost all members of this species having been brought into captivity due to their displacement in the wild by an opencast coalmine. Powelliphanta (F: Rhytididae) is a genus of endemic carnivorous snails, which includes 10 species, 27 subspecies and numerous undescribed taxa. As well as its diversity, Powelliphanta is renowned for the large size of its members (up to 90mm diameter) and their attractively-patterned shells. Most taxa are threatened due to habitat loss and predation by introduced mammalian predators. The study commences with a literature review to refine husbandry methods and to assess requirements for captive breeding of snails. From this review investigations are made into stocking densities, substrate, reproductive biology, body condition and growth of the P. augusta captive population. To determine an appropriate stocking density for P. augusta groups of six snails were kept at two densities; with either 720cm2, or 1440cm2 per group. Survival and weight gain were compared over 52 weeks. There was no difference in weight gain between treatments, but survival was significantly reduced at the highest density. The agent responsible for mortality was not identified, but previous studies on snails implicate disease. The effect of calcium supplementation on reproductive output was assessed by introducing limestone chip to the captive substrate of sphagnum moss. The experiment was aborted after eight months because of the apparently lethal effects of treatment. Egg production during this time was negligible, probably due to the lack of appropriate environmental cues. P. augusta showed evidence of size-specific fecundity, with a significant increase in clutch size with parental shell volume. Size-specific fecundity is predicted to cause size-assortative mating, but experiments determined that mate-choice is random with respect to shell size.Body condition was studied using the residuals from a regression of mass and size at time of capture. Condition in the wild showed strong seasonal variation, with a high in December and January. Body condition in captive snails remained stable, at a level equivalent to the peak of condition in the wild. The growth of captive snails was modeled using a Gompertz curve. Using a 30mm shell diameter as a reproductive indicator, snails hatching in captivity are predicted to reach maturity in approximately eight years. The study concludes by discussing the implications of the research for husbandry. Updates and expansions to the analyses are suggested, as well as methods for effectively monitoring the captive population.</p>

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Ecology of the Land Snails Mesodon thyroidus and Allogona profunda

Cited by 26 publications

References 8 publications

Distribution and abundance of the land snail Pollicaria elephas (Gastropoda: Pupinidae) in limestone habitats in Perak, Malaysia

Distribution and abundance of the land snail Pollicaria elephas (Gastropoda: Pupinidae) in limestone habitats in Perak, Malaysia

Συνεισφορα Στη Μελετη Της Οικοφυσιολογιας Του Γαστεροποδου Πνευμονοφορου Helix Lucorum L.

Husbandry of the Carnivorous Land Snail, Powelliphanta augusta (Gastropoda: Pulmonata: Rhytdidae)

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