Avaliação do estado de exploração dos recursos acessíveis a pescaria artesanal de arrasto para praia, nos distritos de Angoche e Moma na Província de Nampula no período de 2009 á 2016

Abstract

The work titled Evaluation of the state of exploitation of the resources accessible to artisanal trawling fishery for the beach, in the districts of Angoche and Moma in the Province of Nampula in the period from 2009 to 2016, aims to compile the statistics of artisanal trawling and biological data and to assess the state of exploitation of resources based on the method of fishing indicators, community indicators and population indicators. The data were acquired in the PescArt database at the National Fisheries Research Institute, Nampula Delegation from 2010 to 2016. These data were submitted to statistical analysis for fishing statistics (Capture, effort and CPUE), were calculated the annual average values. For determining the dominance pattern each family was evaluated based on their abundance and frequency of occurrence. The proportion of small pelagics and demersal was submitted to statistical analysis with χ2 test; Descriptive statistics of the frequency distributions of lengths (n, Lméd, Lmin, Lmax, Lmodal) were calculated for annual sample series. Capture and yield results show a downward trend in both districts and in the time series under analysis. For the study of dominance pattern there was a variation of dominance families across the time series. There is, however, an abundance of small pelagics compared to demersal ones for the two districts. The results of the analysis of population indicators have generally indicated that catches are on juveniles, which may be linked to the use of inappropriate gear in growing areas, such as the coastal region and estuaries, which may compromise the replenishment of stock in the future, if these practices persist.