Eco Facts 2.0 / 5 based on 2 ratings ? ArchaeologyASAQA Created by: HannahCreated on: 01-05-13 22:16 Fish bones rarely survive because... they are small and more fragile. Often they can be missed and sometimes digested by rats and mice. 1 of 13 To find fish bones we need to... sieve, but this is expensive and an expert is required for idenitifcation. 2 of 13 Every fish has an... Otolith. 3 of 13 An otolith... Keeps the fish upright. 4 of 13 An otolith can be used to find out the... age, species and size of a fish, as well as the season in which the fish died. 5 of 13 Case Study Oronsay Middens - search for otoliths to identify eating habits of those occupying the site at how they moved through the year. 6 of 13 The part we use to gain information is the... Collagen. 7 of 13 We do this by studying the... Isotopes in fish bone collagen. 8 of 13 This can determine... Whether the fish lived in freshwater/if it was over-fished and what the effects of this were. 9 of 13 Beetles survive thanks to their... exo-skeletons. 10 of 13 By idenitfying the species of a beetle you can gain information on... climate change by looking at the habitat in which they lived. 11 of 13 For example, the... Black Sea Bream is a sign of warmer periods. 12 of 13 But during colder periods... Nettle bugs appear, which feed on stinging nettles. 13 of 13
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