Seasonal Incidence of Parasitism in the Painted Turtle, Chrysemys picta marginata Agassiz

Gw, Esch; Jw, Gibbons

doi:10.2307/3276778

Cited by 22 publications

(19 citation statements)

References 4 publications

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“…Because the recapture rate of hatchlings is high it is assumed that the greatest mortality, over 90%, occurs through nest predation, predation of nestlings mov- The mortality rate was 0.15 for females, which is not significantly different from the regression slope and validates the extrapolation of the survivorship curve beyond the 1Oth yr. The higher survivorship of adult females is also supported by the raccoon predation data as well as the reduced parasitic helminth load found in adult females by Esch and Gibbons ( 1967). It suggests that reproduction and nesting do not impose a high mortality risk on females.…”

Section: Age Structuresupporting

confidence: 53%

The Evolutionary and Mathematical Demography of the Turtle Chrysemys picta

Wilbur¹

1975

Ecology

152

120

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A mark—recapture study of a population of painted turtles, Chrysemys picta, started by O. J. Sexton between 1953 and 1957 was continued between 1968 and 1973. Life tables are constructed and a demographic history of the population is suggested. Males mature during their 4th yr and first breed at age five. Females mature at age seven and lay two clutches of about 6 to 7 eggs each year. Mortality is about 92% between laying and the arrival of the hatchlings at the pond. Juvenile and adult mortality is at a constant exponential rate of about 0.15 for males and 0.18 for females each year. Raccoons, Procyon lotor, are an important predator during spring migrations. There is no indication of senescence; females over 30 yr old are still reproductive. Between 1954 and 1972 the population's size has been reduced from an estimated 981 to about 186 animals. This has been accompanied by a decrease in mean generation time from 12.35 to 10.70 yr. Survivorship from laying to arrival at the pond has more than doubled, but adult survivorship has decreased. These changes are attributed to an increased predation rate resulting from a reduction in the number of safe basking sites. A hypothetical population was simulated by recurrent use of a population projection matrix, derived from the 1954 life table, to demonstrate the stability characteristics of this long—lived, iteroparous species. The evolution of this life history is interpreted as an adaptation to a highly uncertain probability of nest success and an effective predator defense in the adult stage.

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Section: Age Structuresupporting

confidence: 53%

The Evolutionary and Mathematical Demography of the Turtle Chrysemys picta

Wilbur¹

1975

Ecology

152

120

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“…Although several recent ecological studies are available on the helminth communities of marine mammals, birds, fish, and amphibians (e.g., Balbuena and Raga 1993;Edwards and Bush 1989;Goater and Bush 1988;Goater et al 1987;Kennedy and Bakke 1989;Kennedy and Williams 1989;Muzzall 1991aMuzzall , 1991, very little effort has been devoted to studying the helminth communities of reptiles (Esch and Gibbons 1976;Esch e t al. 1979).…”

Section: Introductionmentioning

confidence: 99%

Helminth infracommunities of Podarcis pityusensis and Podarcis lilfordi (Sauria: Lacertidae) from the Balearic Islands (western Mediterranean basin)

Roca¹,

Hornero²

1994

Can. J. Zool.

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A survey of the helminth communities of Podarcis pityusensis (Boscá, 1883) and Podarcis lilfordi (Günther, 1874) (Sauria: Lacertidae) from the Pityusic and Gimnesic islands, respectively, in the Balearic Islands, Spain, was conducted. Both host species harbour similar though not identical helminth infracommunities. An analysis of the patterns of diversity for all helminths revealed that both lizards have depauperate isolationist infracommunities, possibly as a result of factors such as host ectothermy, the simplicity of their digestive canal, low vagility, and generalist feeding.

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“…reducing the mean size of the surviving population. Studies by Esch and Gibbons (1967) on the parasites of the painted turtle (Clrtysernys picta) indicated that during hypobiosis young nematodes continue to mature but that older individuals died during the inactive period. Mature Physaloptera maxillaris in the hibernating skunk are affected similarly (Cawthorn and Anderson 1976).…”

Section: Discussionmentioning

confidence: 99%

Overwintering of helminths in the garter snake (Thamnophis sirtalis sirtalis)

Rau¹,

Gordon²

1978

Can. J. Zool.

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1978.Overwintering of helminths in the garter snake (Thamnophis sirtalis sirtalis). Can. J . Zool. 56: 1765-1767. The overwintering of helminths in the garter snake (Thamnophis sirtalis sirtalis) was studied. The hypobiosis of the host was not accompanied by significant changes in the prevalence or the intensity of infection of the trematodes Zeugorchis aequatus and Lechriorchis primus, the mesocercariae of Alaria sp., or the nematode Rhabdias sp. There is evidence to suggest that some species continue their development in the overwintering host. RAU, M. E., et D. M. GORDON. 1978. Overwintering of helminths in the garter snake (Thamnophis sirtalis sirtalis). Can. J . Zool. 56: 1765-1767. On trouvern ici une ttudc tie la vie en hiver d'h~lminthidds parasites de Is couleuvm n y i e (Thnmnr~phis sirraiis sirtalisl. L'hypobiose de I'hGte ne semhle pi\s causer de chmgements importantsdeln friquence au dehgr;~viti des infectrons pw les r~r n a t~l e s Z~~r r~c~r r . l r i s~e q r t u r u r .L~rhrir1rchi.r prirnrrs, pnr la rntstlcercaire d'Alariu sp. ou par le nematode Rhahdias sp. Certains indicec permetlent de cmire que dcs cs@ces continuent leur developpement chez I'h6te en hihernation.[Traduit par le journal]

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Seasonal Incidence of Parasitism in the Painted Turtle, Chrysemys picta marginata Agassiz

Cited by 22 publications

References 4 publications

The Evolutionary and Mathematical Demography of the Turtle Chrysemys picta

The Evolutionary and Mathematical Demography of the Turtle Chrysemys picta

Helminth infracommunities of Podarcis pityusensis and Podarcis lilfordi (Sauria: Lacertidae) from the Balearic Islands (western Mediterranean basin)

Overwintering of helminths in the garter snake (Thamnophis sirtalis sirtalis)

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