Aspectos da cadeia produtiva, biologia reprodutiva e estrutura populacional de Callinectes danae no estuário do Rio Paraguaçu

Abstract

The main objective of the study was to describe the socio-economic importance of fishing for tinga crab (Callinectes danae) and analyze the biology and population structure of the species in the estuary of the Paraguaçu River region (11 ° 11'S latitude and 13 ° 42'S and longitude 38 ° 40 ' W ° 07'W and 42), in the fishing communities of San Francisco do Paraguaçu (SF) and Santiago do Iguape (SI). Monthly collections were made from specimens captured by fishermen communities from August / 2013 to July / 2014. The sex ratio (male: female) considering all the months of sampling, was 0.6: 1 and 2.9: 1 for São Francisco and Santiago respectively. The physiological maturity curve had carapace width (LC) equal to 54.84 mm (males) and 54.36 (females) in São Francisco, Santiago and 57.90 mm (males) and 61.47 mm (females). Morphological maturity reached for male individuals in San Francisco was 57.73 mm and 61.70 Santiago. In females the morphological maturity was 63.40 and 62.30 in São Francisco in Santiago. The profile of crab fishermen is handmade kind, capturing being an activity commonly performed by men. In São Francisco and Santiago, the majority (95% and 80%, respectively) fishermen have guided their income solely on fishing, relevant to the fishery of crab C. danae. The average production of crab equals 14.6 and 18.5 kg gross weight (crab in natura) in São Francisco and Santiago respectively, generating the production of 2.4 and clean weight 3,03Kg (cathode crab). São Francisco's total revenue is generated over 40% of cost, while in Santiago this will equal 41%. The reduced spending on production inputs associated with use of family labor conditions an economic profitability in the fishery for C. danae in the fishing communities studied. The organization for the flow of production and increased processing efficiency could leverage this fishing activity, generating higher earnings for communities.