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5. Species

A total of 29 species or species groups have been assessed (Fig. 5.1). On average biodiversity seems to be in good condition. Several groups show a declining trend over the past 5 years (e.g. inner shelf demersal and pelagic fish species, terns). Condition of other species or species groups seems to be stable. A discussion on the results is provided below.

Species Assessment

Composante Info Niveau d'évaluation Confiance
Très pauvre Pauvre Bon Très bon À niveau En tendence
Dolphins Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High Medium
West-african manatee (Trichechus senegalensis) Worst 10% trend: Declining Most trend: Stable Best 10% trend: Stable High Medium
Sharks and rays - targeted and bycatch Worst 10% trend: Declining Most trend: Stable Best 10% trend: Stable High High
Sharks and rays - non exploited Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High Enter confidence trend
Blue shark (Prionace glauca) Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High High
Scalloped hammerhead (Sphyrna lewini) Worst 10% trend: Declining Most trend: Stable Best 10% trend: Declining High High
Common tern (Sterna hirundo) Worst 10% trend: Declining Most trend: Declining Best 10% trend: Stable High High
Sandwich tern (Sterna sandvicensis) Worst 10% trend: Declining Most trend: Declining Best 10% trend: Improving High High
Tuna and billfish Most trend: Improving High Medium
Inner shelf (0-50m) demersal fish assemblages Worst 10% trend: Declining Most trend: Declining Best 10% trend: Declining High High
Outer shelf (50-200m) demersal & benthopelagic fish assemblages Worst 10% trend: Declining Most trend: Stable Best 10% trend: Stable High High
Slope - demersal fish assemblages (>200m) Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High High
Meso-pelagic fish assemblages Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High High
Small pelagics - inner shelf (0-50m) Worst 10% trend: Declining Most trend: Declining Best 10% trend: Declining High High
Small pelagics - outer shelf (50-200m) Worst 10% trend: Not available Most trend: Not available Best 10% trend: Not available Enter confidence grade Enter confidence trend
Inner-shelf reef fish assemblages (0-50m) Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High High
Inner shelf – squid etc Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High Low
Inner shelf - crustaceans Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High Low
Inner shelf – other invertebrate spp. Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High Low
Shoreline and intertidal soft sediment invertebrate spp. Worst 10% trend: Declining Most trend: Declining Best 10% trend: Declining High High
Shoreline and intertidal rocky shore invertebrate spp. Worst 10% trend: Not available Most trend: Stable Best 10% trend: Declining High High
Benthic filter feeders of soft and hard subtrata Worst 10% trend: Declining Most trend: Declining Best 10% trend: Declining High High
Seabirds (resident) Worst 10% trend: Declining Most trend: Stable Best 10% trend: Stable High Enter confidence trend
Seabirds (migratory) Worst 10% trend: Declining Most trend: Stable Best 10% trend: Declining High High
Turtles Worst 10% trend: Stable Most trend: Stable Best 10% trend: Improving High High
Mangrove species Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High High
Seagrass species Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable Medium Medium
Algae species Some data Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable Medium Medium
Dune, saltmarsh, foreshore, wetland species Worst 10% trend: Stable Most trend: Stable Best 10% trend: Stable High High
Legend
 Très pauvre  Pauvre  Bon  Très bon
Tendances récentes  Amélioration  Stable Confiance  Confiance élevée basée sur des données de haute qualité
 En déclin  Peu clair  Confiance modérée basée sur quelques preuves limitées
 Pires/meilleurs 10% des places  Faible confiance basée sur le jugement d'experts avec peu ou pas de données