Análise da influência dos parâmetros oceanográficos (maré, temperatura) e ambientais (ventos, precipitação) na abundância dos pequenos pelágicos no distrito de Pebane provincia da Zambézia

Abstract

The analysis of the influence of oceanographic and environmental parameters on the abundance of fishery resources has been studied in several scientific research projects. The abundance of these resources depends on many factors, such as the precipitation that provides fresh water through the rivers, or drainage rainwater in coastal watersheds in which they provide nutrients for water fertilization, thereby stimulating productivity, high catches are recorded, when the intensity of the winds is greater contributes to the occurrence of the coastal outcrop which increases the survival and growth of the fish. The results of this study showed that there was a significant positive correlation between the abundance of the small pelagic fishery in relation to temperature (r2 = 0.5160 and p = 0.029), live tide (r2 = 0.7329 and p = 0.003) and dead tide r2 = 0.6346 and p = 0.006), there was no significant positive correlation between abundance of small pelagic fishery by means of wind speed and precipitation. The highest abundance was observed in 2010 with about 63398.6kg / net and the lowest in 2009 with 563.97 kg / net. These results highlight the role of tide and temperature for coastal zones in their productivity, survival and growth of fish populations during the phases of their life cycle. In turn, this study can contribute to the forecast of catches and improve the management of artisanal fisheries, for example, can be used to forecast the seasonal abundance of a given stock of fishery resources to establish fishing quotas.