Open AccessREPRODUCTION AND RECRUITMENT OF THE BROWN SHRIMP Penaeus subtilis IN THE AMAZON RIVER CONTINENTAL SHELF
Author(s) -
Israel Hidenburgo Aniceto Cintra,
José Augusto Negreiros Aragão,
Kátia Cristina de Araújo Silva,
Miguel Petrere Júnior
Publication year - 2021
Publication title -
arquivos de ciências do mar
Language(s) - English
Resource type - Journals
eISSN - 2526-7639
pISSN - 0374-5686
DOI - 10.32360/acmar.v54i1.41690
Subject(s) - shrimp , estuary , amazon rainforest , fishery , fishing , continental shelf , biology , juvenile , geography , ecology
This paper analyzes the pattern of the reproduction and recruitment of the pink shrimp Penaeus subtilis in the Amazon River continental shelf. Biostatistics samples obtained on board of industrial fishing vessels and in the estuaries of the northeastern state of Para were use in the analysis as well as monthly data on landings processed by commercial category. The sex ratio, for female and male respectively, was 61% to 39%, in the samples of commercial fishery, and 54% to 46%, in the samples of the estuary. The size at first maturity of females was estimated at 142.6 mm. The period of highest intensity of reproductive activity ranges from May to September. The settlement of post-larvae and residence period of juveniles in the estuary occurs with more intensity between June and September and the period of highest intensity of recruitment to the fishing areas begins in September extending until January of the following year. The main period of developing and maturing of the individuals ranges from November to July. It was observed a strong relationship between the hydrological cycle in the region, mainly the flow of Amazon River, and the life cycle of the species.
Keywords: brown shrimp, sexual maturity, reproduction period, juvenile recruitment, Amazon.