TNC-CORDIO coral reef monitoring manual_book_coral1

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invertebrate data analysis 2 data transferred into summary graphs 1 invertebrate survey data collected on site 3 graphs fed into long term data reviews 38
Macro-invertebrate data analysis and presentation The density of key macro-invertebrates is commonly measured in numbers per 250m 2 . Sea-urchins however are only counted along 10m of any transect and are therefore measured in numbers per 50m 2 . 1 Survey: Complete a Macro-invertebrate Datasheet for each transect in your site to record the numbers of key species. Survey sea urchins for 10m of each transect and the full 50m for other macro-invertebrates. 2 Summary: Add up the total number of macro-invertebrates for all transects and then calculate the average densities (the total number divided by the number of transects). The result gives you the average density of key invertebrates per 250m 2 (and per 50m 2 for sea urchins). 3 Graphs: Compiling your data into graphs to show the average density of each macro-invertebrate for the site, with a separate graph for large and small sea urchins. 4 Review: To compare long term data, each species of macro-invertebrate is independently reviewed. Plot separate graphs for each species showing the average densities for consecutive surveys. As these graphs are completed after each survey, the result will enable you to review the long-term trends of all macro-invertebrates for your site. unhealthy fair healthy high fishing pressure, over-collection of shells low fishing pressure, no collection of shells many sea urchins, no shells, few macro-invertebrates fewer sea urchins, some shells & macro-invertebrates decreasing numbers of sea urchins, increasing numbers of shells and macro-invertebrates high numbers and diversity of shells and other macro-invertebrates, very low number of sea urchins 39
Page 1 and 2: A manual for community-based monito
Page 3 and 4: Table of contents 1.0...Introductio
Page 5 and 6: Introduction This coral reef monito
Page 7 and 8: 2 Survey design - where, when & how
Page 9 and 10: Monitoring, where? Monitoring surve
Page 11 and 12: Time - when and how often? Monitori
Page 13 and 14: 3.0 Underwater coral reef monitorin
Page 15 and 16: 3.1 Belt Transect for fish abundanc
Page 17 and 18: O2 O1 tape measure Step by step fis
Page 19 and 20: Fish indicator species The fish spe
Page 21 and 22: Data analysis and presentation Data
Page 23 and 24: Fish species size distribution Fish
Page 25 and 26: Interpreting Fish Survey Results un
Page 27 and 28: 3.2 Point Intercept Transect for be
Page 29 and 30: step by step method for benthic sur
Page 31 and 32: enthic substrate data analysis & pr
Page 33 and 34: Interpreting benthic survey results
Page 35 and 36: 3.3 Belt Transects for macro-invert
Page 37: Macro-invertebrate indicators Macro
Page 41 and 42: 4.0 Field procedure for conducting
Page 43 and 44: 5.0 Monitoring of small-scale fishe
Page 45 and 46: Data analysis and presentation Summ
Page 47 and 48: Calculating average catch rate for
Page 49 and 50: 6.0 Digital Data management Paper d
Page 51: McManus JW, Ablan MCA, Vergara SG,

TNC-CORDIO coral reef monitoring manual_book_coral1

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