title: Ecosystems: Marine monitoring is hard and costly.
authors.forename: Miguel Pessanha
authors.initials: MP
authors.lastname: Pais
mesh_terms: D000818:Animals; D003247:Conservation of Natural Resources / Q000379:methods*; D017753:Ecosystem; D005398:Fisheries / Q000706:statistics & numerical data*; D005399:Fishes / Q000502:physiology*