Proximate factors influencing egg cannibalism in the land snail Arianta arbustorum (Pulmonata, Helicidae)

Baur, Bruno; Baur, Anette

doi:10.1007/bf00379252

Cited by 46 publications

(23 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Eggs were collected every seventh day and incubated on moist tissue paper at 19°C. Hatchlings were counted and removed each day to prevent egg cannibalism (Baur & Baur, 1986). Survival rates of inbred and outbred offspring were observed in two environments in 1991.…”

Section: Methodsmentioning

confidence: 99%

Comparison of inbreeding and outbreeding in hermaphroditic Arianta arbustorum (L.) (land snail)

Chen

1993

Heredity

View full text Add to dashboard Cite

Inbreeding depression was studied in the outcrossing hermaphroditic land snail Arianta arbustorum, by comparing the reproductive performance of full-sib pairs (inbreeding) and pairs of unrelated individuals (outbreeding). Fecundity (number of eggs laid) was not found to differ significantly between inbreeding and outbreeding pairs under laboratory conditions, but fertility (the proportion of eggs that hatched) and the number of hatchlings produced by inbreeding pairs were significantly lower than those of outbreeding pairs. Estimates of reduction in the fertility of eggs (0.37) and in the number of hatchlings produced (0.56) suggested significant inbreeding depression in full-sib crosses. Inbred offspring reared in the garden had a higher mortality than outbred offspring reared in the same environment, with an inbreeding depression of 0.30 in the first year after hatching; but no significant difference was found when offspring from both groups were kept in the laboratory. The results support the hypothesis that cross-fertilization in simultaneous hermaphrodites is maintained by strong inbreeding depression.

show abstract

Section: Methodsmentioning

confidence: 99%

Comparison of inbreeding and outbreeding in hermaphroditic Arianta arbustorum (L.) (land snail)

Chen

1993

Heredity

View full text Add to dashboard Cite

show abstract

“…The mucus may also contain repelling substances (TOMPA 1984). Members of Helicidae for which the way of egg-laying and parental care have been studied in detail (Arianta arbustorum, Theba pisana, Cepaea nemoralis, Helix pomatia, H. lutescens, H. aspersa, H. texta) (WOLDA 1970, DZIABASZEWSKI 1975, COWIE 1980, TOMPA 1984, BAUR B. & BAUR A.…”

Section: Egg-laying Incubation Hatchingmentioning

confidence: 99%

Life cycle and population dynamics of Helicodonta obvoluta (O. F. Müller, 1774) (Gastropoda: Pulmonata: Helicidae)

Maltz¹

2003

Folia Malac.

View full text Add to dashboard Cite

Life cycle of Helicodonta obvoluta (O. F. Müll.) was studied in the field and in laboratory. Mating lasts 2-3 hrs and includes: meeting of the partners, recognition, courtship dance, copulation, resting phase and parting. No spermatophores were observed upon dissection of a total of 90 adult individuals which seems to indicate that H. obvoluta does not produce them. The egg-laying snail embeds anterior part of its body 4-6 mm deep in rotting timber. The egg-laying lasts from about a dozen hours to two days. Freshly laid eggs are white, calcified, slightly translucent and get opaque in a few days. They are slightly oval, of 2.10-2.85 mm major and 2.00-2.60 mm minor diameter. In laboratory, eggs are laid in spring (March-June) and autumn (August-November), in the field, the egg-laying periods are somewhat shorter (April-beginning of June, end of August-beginning of October). Most laboratory snails laid eggs only once in their lifetime, the maximum number of egg-laying periods was four. The percentage of hatching eggs in laboratory is ca. 59%. The number of eggs per clutch ranges from 9 to 27. The incubation period ranges from 14 to 31 days, and is shorter for spring (14-18 days) compared to autumn (19-23 days) clutches. Hatching is asynchronous, lasting from 1 to 4 days. With approaching hatching, the white colour of the egg disappears, so that the young snail is surrounded only by a translucent membrane, which gets broken as a result of its movements. Newly-hatched snails have shells of 1 whorl, devoid of periostracal hairs. No egg cannibalism was observed. Out of 174 young hatched in laboratory, 159 reached maturity. During numerous dissections of adult individuals no eggs were found in the reproductive tracts; if there is an egg-retention, it must be very short-lasting. Placing eggs in rotting timber and covering them with mucus protects them from drying-out, ensures a more favourable temperature and limits accessibility to predators. The number, relative and absolute size of eggs, number of clutches per year and per lifetime, and the life span seem to be correlated with size rather than with phylogenetic position of the species. No uniparental reproduction was observed. In laboratory the time elapsing between hatching and maturity (lip completely formed) ranged from 140 to 624 days; it varied between individuals hatched in particular years and seasons, e.g. young of the spring 1997 grew much faster (mean 354 days) than those of the spring 1999 (mean 442 days). The time required to reach full size was not correlated with the ultimate number of whorls. The growth shows three distinct phases: a quick initial phase of 3-4 months, a slow phase, and a short quick phase preceding lip formation. The monthly increment depends on the growth phase: 1.15 whorl in phases 1 and 3, 0.30 whorl in phase 2. The growth rate in the field is similar to that observed in laboratory, though with a wider scatter within growth phases and some differences between years and seasons. Depending on weather conditions, the youngest...

show abstract

“…Therefore juvenile survival is very important and may be affected by intraspecific predation, ie, cannibalism. One type of cannibalism, namely oophagy, which concerns the consumption of unhatched eggs by hatchlings (Polis, 1981), has been studied in some land snail species (Baur, 1988(Baur, , 1990a(Baur, , b, 1992(Baur, , 1994a; Baur and Baur, 1986). …”

Section: Introductionmentioning

confidence: 99%

Influence of egg cannibalism on growth, survival and feeding in hatchlings of the land snail Helix aspersa Müller (gastropoda, pulmonata, stylommatophora)

Desbuquois

1997

Reprod. Nutr. Dev.

View full text Add to dashboard Cite

Proximate factors influencing egg cannibalism in the land snail Arianta arbustorum (Pulmonata, Helicidae)

Cited by 46 publications

References 21 publications

Comparison of inbreeding and outbreeding in hermaphroditic Arianta arbustorum (L.) (land snail)

Comparison of inbreeding and outbreeding in hermaphroditic Arianta arbustorum (L.) (land snail)

Life cycle and population dynamics of Helicodonta obvoluta (O. F. Müller, 1774) (Gastropoda: Pulmonata: Helicidae)

Influence of egg cannibalism on growth, survival and feeding in hatchlings of the land snail Helix aspersa Müller (gastropoda, pulmonata, stylommatophora)

Contact Info

Product

Resources

About