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Age and size structure of populations of small marbled newts (Triturus marmoratus pygmaeus) from Doñana National Park (SW Spain). A case of dwarfism among dwarfs

AuthorsDíaz-Paniagua, Carmen ; Mateo, José A.; Andreu, Ana C.
Issue Date1996
PublisherCambridge University Press
CitationJournal of Zoology 239: 83- 92 (1996)
AbstractThe body size of specimens of Trituras marmoratus pygmaeus from Doñana is the smallest recorded for this subspecies. Snout-vent length averages 42.3mm in males, and 43.9mm in females. Mean body mass in males is 2.04 g and 2.29g in females. The age of newts was estimated by means of skeletochronological methods. The maximum longevity recorded was 10 years in females and nine years in males, with one or two years being the age at maturity. As in other newts, body size is not a good predictor of age, since a wide range of body length was found within each age class. Growth in females was substantial in subsequent years, showing an overall positive tendency. However, males showed slight or even negative growth. Newts from Doñana are different from other nearby localities with similar climatic characteristics. This is mainly due to their short juvenile and terrestrial phase.
Identifiersdoi: 10.1111/j.1469-7998.1996.tb05438.x
issn: 0952-8369
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