diff --git a/backend/geonature/core/gn_meta/models/datasets.py b/backend/geonature/core/gn_meta/models/datasets.py
index eacb7785e8..ea199f4204 100644
--- a/backend/geonature/core/gn_meta/models/datasets.py
+++ b/backend/geonature/core/gn_meta/models/datasets.py
@@ -139,6 +139,27 @@ def user_actors(self):
     def organism_actors(self):
         return [actor.organism for actor in self.cor_dataset_actor if actor.organism is not None]
 
+    @hybrid_property
+    def obs_count(self):
+        from geonature.core.gn_synthese.models import Synthese
+
+        return db.session.scalar(
+            select(func.count(Synthese.id_synthese))
+            .select_from(Synthese)
+            .where(Synthese.id_dataset == self.id_dataset)
+        )
+
+    @hybrid_property
+    def hab_count(self):
+        from gn_module_occhab.models import OccurenceHabitat, Station
+
+        return db.session.scalar(
+            select(func.count(OccurenceHabitat.id_habitat))
+            .select_from(OccurenceHabitat)
+            .where(Station.id_station == OccurenceHabitat.id_station)
+            .where(Station.id_dataset == self.id_dataset)
+        )
+
     def is_deletable(self):
         return not DB.session.execute(self.synthese_records.exists().select()).scalar()
 
diff --git a/backend/geonature/core/gn_meta/routes.py b/backend/geonature/core/gn_meta/routes.py
index 20f6c584cd..ec6052f509 100644
--- a/backend/geonature/core/gn_meta/routes.py
+++ b/backend/geonature/core/gn_meta/routes.py
@@ -618,22 +618,6 @@ def get_export_pdf_acquisition_frameworks(id_acquisition_framework):
     dataset_ids = [d.id_dataset for d in af.datasets]
     nb_data = len(dataset_ids)
 
-    # Add count of Synthese observations for each dataset
-    for dataset in acquisition_framework["datasets"]:
-        dataset_obs_count_query = (
-            select(func.count(Synthese.id_synthese))
-            .select_from(Synthese)
-            .where(Synthese.id_dataset == dataset["id_dataset"])
-        )
-        dataset_hab_count_query = (
-            select(func.count(OccurenceHabitat.id_habitat))
-            .select_from(OccurenceHabitat)
-            .where(Station.id_station == OccurenceHabitat.id_station)
-            .where(Station.id_dataset == dataset["id_dataset"])
-        )
-        dataset["count_synthese_observations"] = DB.session.scalar(dataset_obs_count_query)
-        dataset["count_habitats"] = DB.session.scalar(dataset_hab_count_query)
-
     query = (
         select(func.count(Synthese.cd_nom))
         .select_from(Synthese)
diff --git a/backend/geonature/core/gn_meta/schemas.py b/backend/geonature/core/gn_meta/schemas.py
index d4e04bf44f..b34f67aba3 100644
--- a/backend/geonature/core/gn_meta/schemas.py
+++ b/backend/geonature/core/gn_meta/schemas.py
@@ -67,6 +67,8 @@ class Meta:
     cor_territories = MA.Nested(NomenclatureSchema, many=True, unknown=EXCLUDE)
     acquisition_framework = MA.Nested("AcquisitionFrameworkSchema", dump_only=True)
     sources = MA.Nested(SourceSchema, many=True, dump_only=True)
+    obs_count = fields.Int(dump_only=True)
+    hab_count = fields.Int(dump_only=True)
 
     @post_dump(pass_many=False, pass_original=True)
     def module_input(self, item, original, many, **kwargs):
diff --git a/backend/geonature/templates/acquisition_framework_template_pdf.html b/backend/geonature/templates/acquisition_framework_template_pdf.html
index cb27cf863f..2bf12cee04 100644
--- a/backend/geonature/templates/acquisition_framework_template_pdf.html
+++ b/backend/geonature/templates/acquisition_framework_template_pdf.html
@@ -299,12 +299,12 @@
                             {{ dataset['dataset_name'] }}
                             {% endif %}
                             <br>
-                            {% if dataset['count_synthese_observations']: %}
-                            Nombre d'observations dans la Synthèse : {{ dataset['count_synthese_observations'] }}
+                            {% if dataset['obs_count'] > 0: %}
+                            Nombre d'observations dans la Synthèse : {{ dataset['obs_count'] }}
                             {% endif %}
                             <br>
-                            {% if dataset['count_habitats']: %}
-                            Nombre d'habitats dans occhab : {{ dataset['count_habitats'] }}
+                            {% if dataset['hab_count'] > 0: %}
+                            Nombre d'habitats dans occhab : {{ dataset['hab_count'] }}
                             {% endif %}
                         </p>
                     </div>
diff --git a/frontend/src/app/metadataModule/af/af-card.component.html b/frontend/src/app/metadataModule/af/af-card.component.html
index 8b6aff2f33..1a812625f2 100644
--- a/frontend/src/app/metadataModule/af/af-card.component.html
+++ b/frontend/src/app/metadataModule/af/af-card.component.html
@@ -421,6 +421,12 @@ <h5>Jeux de données associés</h5>
                 <div>
                   <small>{{ dataset.unique_dataset_id }}</small>
                 </div>
+                <div *ngIf="dataset['obs_count'] > 0">
+                  <small>Nombre d'observations dans la Synthèse : {{ dataset['obs_count'] }}</small>
+                </div>
+                <div *ngIf="dataset['hab_count']">
+                  <small>Nombre d'habitats dans occhab : {{ dataset['hab_count'] }}</small>
+                </div>
               </td>
             </tr>
           </table>