Aquacultural and Fisheries Economics [EE113]; Supply, Demand and Prices [EE130]; Income and Poverty [EE950]; Aquaculture (Animals) [MM120]; Prion, Viral, Bacterial and Fungal Pathogens of Humans [VV210]; Mathematics and Statistics [ZZ100]; coronavirus disease 2019; crustacean culture; demand; economic impact; extensive farming; extensive livestock farming; factors of production; human diseases; income; losses; mathematical models; pandemics; productivity; regression analysis; shrimp culture; shrimps; supply balance; viral diseases; aquatic animals; aquatic organisms; shellfish; Decapoda; man; Severe acute respiratory syndrome coronavirus 2; Ecuador; Malacostraca; Crustacea; arthropods; invertebrates; animals; eukaryotes; Andean Group; high Human Development Index countries; Latin America; America; South America; upper-middle income countries; Homo; Hominidae; primates; mammals; vertebrates; Chordata; Severe acute respiratory syndrome-related coronavirus; Betacoronavirus; Coronavirinae; Coronaviridae; Nidovirales; positive-sense ssRNA Viruses; ssRNA Viruses; RNA Viruses; viruses; shrimp production; crustacean farming; crustacean ranching; shellfish farming; shellfish ranching; production factors; SARS-CoV-2; shrimp farming; shrimp ranching; supply and demand; viral infections; aquatic species