diff --git a/data/input/observersCharts.xml b/data/input/observersCharts.xml
index 4e8fc6f0d33a9b9943acc600235362d7ad68d766..0cc5c3c2f57cb02615c5da7632b1a480804ca132 100644
--- a/data/input/observersCharts.xml
+++ b/data/input/observersCharts.xml
@@ -2,36 +2,36 @@
 <!DOCTYPE xml>
 <hashtable>
 
-	<entry>
-		<java-class>pikelake.pikes.PikesGroup</java-class>
-		<fr.cemagref.observation.kernel.ObservablesHandler>
-			<observers>
-				<pikelake.environment.Movement2DWithinShapeObserver>
-					<title>Bariousses</title>
-					<bgColor>
-						<red>230</red>
-						<green>230</green>
-						<blue>230</blue>
-						<alpha>255</alpha>
-					</bgColor>
-					<pikeColor>
-						<red>255</red>
-						<green>0</green>
-						<blue>0</blue>
-						<alpha>255</alpha>
-					</pikeColor>
-					<shapeColor>
-						<red>0</red>
-						<green>0</green>
-						<blue>0</blue>
-						<alpha>255</alpha>
-					</shapeColor>
-					<hsiColor>
-						<red>51</red>
-						<green>102</green>
-						<blue>255</blue>
-						<alpha>255</alpha>
-					</hsiColor>
+    <entry>
+        <java-class>pikelake.pikes.PikesGroup</java-class>
+        <fr.cemagref.observation.kernel.ObservablesHandler>
+            <observers>
+                <pikelake.environment.Movement2DWithinShapeObserver>
+                    <title>Bariousses</title>
+                    <bgColor>
+                        <red>230</red>
+                        <green>230</green>
+                        <blue>230</blue>
+                        <alpha>255</alpha>
+                    </bgColor>
+                    <pikeColor>
+                        <red>255</red>
+                        <green>0</green>
+                        <blue>0</blue>
+                        <alpha>255</alpha>
+                    </pikeColor>
+                    <shapeColor>
+                        <red>0</red>
+                        <green>0</green>
+                        <blue>0</blue>
+                        <alpha>255</alpha>
+                    </shapeColor>
+                    <hsiColor>
+                        <red>51</red>
+                        <green>102</green>
+                        <blue>255</blue>
+                        <alpha>255</alpha>
+                    </hsiColor>
 					<textColor>
 						<red>10</red>
 						<green>10</green>
@@ -41,8 +41,32 @@
                     <margin>0</margin>
 					
                 </pikelake.environment.Movement2DWithinShapeObserver>
-			</observers>
-		</fr.cemagref.observation.kernel.ObservablesHandler>
-	</entry>
+            </observers>
+        </fr.cemagref.observation.kernel.ObservablesHandler>
+    </entry>
+    <entry>
+        <java-class>pikelake.pikes.Pike</java-class>
+        <fr.cemagref.observation.kernel.ObservablesHandler>
+            <observers>
+                <fr.cemagref.observation.observers.jfreechart.TemporalSerieChart>
+                    <graphType>LINE</graphType>
+                    <title>Weights</title>
+                    <variableName>weight</variableName>
+                </fr.cemagref.observation.observers.jfreechart.TemporalSerieChart>
+            </observers>
+        </fr.cemagref.observation.kernel.ObservablesHandler>			
+    </entry>
+    <entry>
+        <java-class>pikelake.pikes.PikesGroup</java-class>
+        <fr.cemagref.observation.kernel.ObservablesHandler>
+            <observers>
+                <fr.cemagref.observation.observers.jfreechart.TemporalSerieChart>
+                    <graphType>LINE</graphType>
+                    <title>Biomass</title>
+                    <variableName>pikesBiomass</variableName>
+                </fr.cemagref.observation.observers.jfreechart.TemporalSerieChart>
+            </observers>
+        </fr.cemagref.observation.kernel.ObservablesHandler>			
+    </entry>
 	
 </hashtable>