POPULATION DYNAMICS OF THE SNAIL THEBA PISANA (HELICIDAE) IN THE SAND DUNES OF NORTHERN ISRAEL
äºIsrael Journal of Ecology and EvolutionSearch for other papers by TZAMERET R. AVIVI in
Current site
Google Scholar
Search for other papers by ZEEV ARAD in
Current site
Google Scholar
The population dynamics of the land snail Theba pisana (Helicidae) was studied for two successive years in the sand dunes of northern Israel and under laboratory conditions. The field population in autumn consisted of two size classes: large snails of more than 10 mm in diameter and small snails of less than 5 mm in diameter. After the first rain, the large snails that emerged from aestivation laid eggs and died. After 3â4 weeks, a new cohort hatched and grew intensively throughout winter to the end of spring. However, a group of small snails ceased growing and entered an early aestivation. These growth-inhibited individuals retained immature size. Their proportion in the population is estimated at 5â10% throughout the year. The population in the laboratory showed a similar growth pattern and size distribution as that in the field. The inhibited-growth group in the laboratory was 40% of the population. We conclude that Theba pisana in Israel developed a strategy of mixed annual and biennial life cycles where part of the population is growth-inhibited in the first year and is retained as a reserve to ensure the continuity of the population in the face of changing biotic and abiotic regimes in a typical Mediterraenean climatic zone.
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
-
Anderwartha H.G., Birch C.C.The distribution and abundance of animals University of Chicago Press Chicago 1954
-
Baker G.M., Hawke B.G.Life history and population dynamics of Theba pisana (Mollusca: Helicidae) in a cereal-pasture rotation J. Appl. Ecol 1990 27 16 29
-
Baker G.H., Vogelzang B.K.Life history, population dynamics and polymorphism of Theba pisana (Mollusca: Helicidae) in Australia J. Appl. Ecol 1988 25 867 887
-
Barrett B.W.Theba pisana in Guernsey J. Conchol 1972 27 391 396
-
Barrett B.W.The landhill snail Theba pisana (Muller) in Jersey Ann. Bull. Soc. Jersiaise 1975 2 409 412
-
Bonavita A., Bonavita D.Contribution agrve l'étude écologique d'Euparypha pisana Muller des rivages méditerranées de la Provance Publ. Stazione Zool. Nappoli 1962 32 189 204
-
Cameron R.A.D., Carter M.A.Intraâand interspecific effects of population density on growth and activity in some helicid land snails (Gastropoda: Pulmonata) J. Anim. Ecol 1979 48 237 246
-
Carter M.A., Ashdown M.Experimental studies on the effects of density, size and shell color and banding phenotypes on the fecundity of Cepaea nemoralis Malacologia 1984 25 291 302
-
Cowie R.H.Precocious breeding of Theba pisana (Muller) (Pulmonata: Helicidae) J. Conchol 1980 30 238
-
Cowie R.H.The life-cycle and productivity of the land snail Theba pisana (Mollusca: Helicidae) J. Anim. Ecol 1984 53 311 325
-
Heller J.Natural history of Theba pisana in Israel J. Zool. London 1982 196 475 487
-
Heller J., The biogeography of the land snails of Israel. The zoogeography of Israel. Dr. W. Junk Publishers, Dordrecht Yom-Tov Y., Chernov E.1988 325 353
-
Lazaridou-Dimitriadou M., Deguzan J.Etude du bilan hydrique et de son évolution en fonction de la temperature et de l'humidité relative chez Euparypha pisana (Muller) (Gasteropode: Pulmone, Stylommatophores) Arch. Zool. Exp. Gen 1978 119 549 564
-
Lazaridou-Dimitriadou M., Deguzan J.Principale caracteristiques du cycle de developpement et importance de la carne de la coquille chez le Gasteropode pulmone dunicole Euparypha pisana (Muller) vivant sur le littoral armoricain Bull. Soc. Sci. Bretagne 1981a 53 11 14
-
Lazaridou-Dimitriadou M., Deguzan J.Etude de l'effect du âgroupementâ des individus chez Theba pisana Malacologia 1981b 20 195 204
-
Moran S.Weather and population density-induced infantilism in the landsnail Theba pisana in a semi arid climate Int. J. Biometeorol 1989 33 101 108
-
Nor'aini D., Bailey S.E.R.Growth, mortality and feeding rates of the snail Helix aspersa at different population densities in the laboratory, and the dispersion of activity of helicid snails by other individuals or their mucus J. Molluscan Stud 1982 48 257 265
-
Oosterhoff L.Variation in growth rate as an ecological factor in the land snail Cepaea nemoralis (L.) Netherlands J. Zool 1977 27 1 132
-
Pomeroy D.E.Some aspects of the ecology of the land snail Helteella vigrata in South Australia Aust. J. Zool 1969 17 495 514
-
Pomeroy D.E., Laws H.M.The distribution of introduced snails in South Australia Rec. South Aust. Mus. (Adelaide) 1967 15 483 494
-
Sacchi C.F.Fattori ecologici e storici nel polimorfismo delle Euparypha (Helicidae: Helicinae) del Marocco occidentale. Studia Ghisler 1955 42 67
-
Sacchi C.F.Ecologie comparée des Gastéropodes des dunnes nell'Elicide dunicola Euparypaha pisana (Mull.) Rend. Accad. Nat. Licei Sci. Fis. Mat. Nat 1971 8 634 638
-
Williamson P., Cameron R.A.D., Carter M.A.Population density affecting adult shell size of Cepaea nemoralis L Nature 1976 263 496 497
-
Yom-Tov Y.The effects of prédation on population density of some desert snails Ecology 1970 51 907 911
-
Yom-Tov Y.Life history tactics in two species of desert snails J. Arid Environ 1983 6 39 41
| å ¨é¨æé´ | è¿å»ä¸å¹´ | è¿å»30天 | |
|---|---|---|---|
| æè¦æµè§æ¬¡æ° | 255 | 69 | 18 |
| å ¨ææµè§æ¬¡æ° | 8 | 1 | 0 |
| PDFä¸è½½æ¬¡æ° | 4 | 0 | 0 |
POPULATION DYNAMICS OF THE SNAIL THEBA PISANA (HELICIDAE) IN THE SAND DUNES OF NORTHERN ISRAEL
äºIsrael Journal of Ecology and EvolutionSearch for other papers by TZAMERET R. AVIVI in
Current site
Google Scholar
PubMed
Search for other papers by ZEEV ARAD in
Current site
Google Scholar
PubMed
The population dynamics of the land snail Theba pisana (Helicidae) was studied for two successive years in the sand dunes of northern Israel and under laboratory conditions. The field population in autumn consisted of two size classes: large snails of more than 10 mm in diameter and small snails of less than 5 mm in diameter. After the first rain, the large snails that emerged from aestivation laid eggs and died. After 3â4 weeks, a new cohort hatched and grew intensively throughout winter to the end of spring. However, a group of small snails ceased growing and entered an early aestivation. These growth-inhibited individuals retained immature size. Their proportion in the population is estimated at 5â10% throughout the year. The population in the laboratory showed a similar growth pattern and size distribution as that in the field. The inhibited-growth group in the laboratory was 40% of the population. We conclude that Theba pisana in Israel developed a strategy of mixed annual and biennial life cycles where part of the population is growth-inhibited in the first year and is retained as a reserve to ensure the continuity of the population in the face of changing biotic and abiotic regimes in a typical Mediterraenean climatic zone.
| å ¨é¨æé´ | è¿å»ä¸å¹´ | è¿å»30天 | |
|---|---|---|---|
| æè¦æµè§æ¬¡æ° | 255 | 69 | 18 |
| å ¨ææµè§æ¬¡æ° | 8 | 1 | 0 |
| PDFä¸è½½æ¬¡æ° | 4 | 0 | 0 |
