RESUMO Este estudo tem como objetivo analisar a importância da carcinicultura marinha para as os trabalhadores e comunidades próximas a uma fazenda de carcicnicultura no Município de Luís Correia (PI), ABSTRACT This study aims to analyze the importance of the marine shrimp farming for workers and communities near a shrimp farm in the municipality of Luis Correia (PI) by socioeconomic characterization and perception of changes in the social, economic and environmental aspects from the establishment of the farm. Thus were prepared two questionnaires, one addressed to employees (55) of the farm and another for residents (57)

Abstract: Aim Identify seasonal variations in the diet of juvenile living in the estuary of the Parnaíba River Delta. Methods Food items were identified through analysis of stomach contents, and later submitted to analysis by regular methods for Frequency of Occurrence (FO), Frequency Numerical (FN), Gravimetric Frequency (FW) and Relative Importance Index (IRI). Results Juvenile diet of Elops saurus that inhabit the lagoons in the Parnaíba delta was composed in order decreasing of importance by Osteichthyes (Teleostei), Insecta and Crustacea in addition to Polychaeta and Nematoda. It was also observed a high frequency of occurrence of fragments of plastics in the diet. In the rainy season, 17 items were recorded in the diet, whereas in the dry season only 7 items were present. Relative Importance Index showed high presence of the Teleostei fish (69.93%) on diet of E. saurus during the rainy season, whereas during the dry period the insects of the families Corixidae (43.25%) and Dysticidae (39.16%). Conclusions With the study it was possible to identify that juvenile are piscivorous in the rainy season when there is a higher availability of prey in the environment and insectivores in the dry season when it reduces the supply of food, indicating feeding flexibility to environmental alterations.

The objective of this work was to evaluate the feeding of Centropomus undecimalis in the estuary of the Parnaíba river delta, with emphasis on diet composition during seasonal variations between dry and rainy seasons. The samples were obtained from artisanal fishing with gillnets, from June 2014 -July 2015. The individuals were measured, weighed and dissected to remove the stomachs. The fish diet was analyzed using the methods: Gravimetric, Frequency of Occurrence, Dominance of the item and Food Index. One hundred and seven stomachs were sampled, of which 72% had food content. The diet consisted of eight Teleostei fish and crustaceans during the dry and rainy seasons, as well as organic material of remains, sediments and plastic. Similarities were observed in stomach contents, indicating specialization, but at individual scale (inter-phenotypic). Thus, it may not occur for the entire population. The analyses of the diet allowed to confirm that C. undecimalis is a carnivorous species for the food chain of the estuary of the Parnaíba River delta, and the diet varies according to prey abundance in the environment.