Age-Related Reproductive Variation in the Redshank Tringa totanus
| Autor: | W. G. Hale, Patrick S. Thompson |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Grande bretagne
Reino unido Avian clutch size biology media_common.quotation_subject Significant difference biology.organism_classification Animal science Age related embryonic structures General Earth and Planetary Sciences Tringa Reproduction General Agricultural and Biological Sciences Royaume uni General Environmental Science media_common |
| Zdroj: | Ornis Scandinavica. 22:353 |
| ISSN: | 0030-5693 |
| Popis: | Timing of breeding and breeding performance in the Redshank were studied in N.W. England during 1983-85. Older, more experienced Redshank tended to pair with birds of similar breeding experience and generally nested early in the season. Experienced females laid significantly larger eggs than inexperienced females. There was no significant difference in mean egg volume between first and replacement clutches or between clutches laid by the same female in consecutive years. Variation in mean egg volume was greater between than within clutches. Egg biometrics had high indices of repeatability both between and within years. Three measures of chick size (weight, bill and tarsus length) were significantly and positively correlated with egg volume. |
| Databáze: | OpenAIRE |
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