| Citation | Hamer, K.C. and R.W. Furness 1993 Parental investment and brood defence by male and female great skuas Catharacta skua: the influence of food supply, laying date, body size and body condition. Seabirds Journal of Zoology 230:7-18. |
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| Ref. No. | 4231 |
| Language | English |
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