Estudo da distribuição, composição por espécies e determinação de alguns parâmetros biológicos das duas principais espécies de camarão no banco de Sofala -P. indicus e M. Monoceros

Abstract

A study was carried out on the distribution, species composition and some biological parameters of two main commercial shrimp species captured by Pescamar in the Sofala Bank - P. indicus and M. monoceros. Shrimp fishing is carried out from the parallel 16° 20' South to 21° 00" South, with the highest yields being obtained from the parallel 16° 50' South to 17° 50' South and between 5 - 25 m deep. The average composition by species of P. indicus and M. monoceros in the total catch of this group is 46% and 20%, respectively. The catch of these two species constitutes 65% of the total catch of the Pescamar company, while 35% is composed of other species (P. japonicus, P. monodon and P. latisulcatus). The species P. indicus presented a single spawning period during one year, while the species M monoceros seems to have several spawning periods, which may explain the abundance of P. indicus in the first semester, while M. monoceros is more or less abundant throughout of the year. The growth was determined based on the frequency distribution of carapace lengths, obtaining the following values: Lº= 41.9 mm; K = 2.8/year; t0 = -4.2 year and Lº= 53.6 mm K = 1.9 /year; t0= -4.1 year, respectively for males and females of P. indicus and Lº= 31.9 mm; K = 3.4/year; t0= -4.3 year and Lº= 48.9 mm K = 2.9 /year; t0 = -4.2 years, respectively for males and females of M. monoceros. (TRADUÇÃO NOSSA)