1. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations 2 complementary techniques : – walking observations – diving observations (at LWST) (sub-tidal)

2. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations 2 pilot study sites : - West-Cotentin (Agon-Coutainville) (Marine Dehail) - Bay of Seine (Langrune-sur-mer) (Stéphanie Linsale)

3. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations Summary of field work: Eggs + Differences between pilot sites (even without quantitative assessment)

4. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations Summary of field work: + Additional observations in July (eggs for task 4) (Do not change the general picture) + In the West Cotentin inter-annual differences (between 2008 and 2009) This requires some estimation of the density of egg masses

5. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations Summary of field work: Types of substratum where eggs are attached (West Cotentin) In the intertidal area : lower diversity than in 2008 In the subtidal area: observations extended to a wider range of types

6. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations Summary of field work: + additional data collected : bathymetry temperature (better time series available in the West-Cotentin) + outputs and display of bottom types ( examples of maps prepared with ArcGIS)

7. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations + outputs and display of bottom types ( examples of maps prepared with ArcGIS) can we use GIS to compute sampled distances?

8. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations + outputs and display of bottom types ( examples of maps prepared with ArcGIS) can we use GIS to compute sampled distances?

9. CRESH project 2 nd Meeting of the CRESH project Plymouth, October 28-30 2009 Task 2: In situ observation of natural substratum where spawning females attach their eggs University of Caen 2009 observations Thank you