Relatório do cruzeiro realizado no Banco de Sofala pelo navio "Pantikapey" de 7/23 - Junho de 1981: camarāo de superficíe

This report of the cruise along the Sofala Bank (Mozambique) describes the catch composition and catch distributions of the shallow water shrimp. Biological data are given for Penaeus indicus and Metapenaeus monoceros which represent 77% of the total catch.

Relatório do cruzeiro realizado no Banco de Sofala pelo navio "Pantikapey" de 7-23/Junho/1981: peixes demersais e fauna acompanhante de camarāo

Catch composition and bathymetric distribution of demersal fish caught along the coast of Mozambique between parallels 16 degree 20' and 19 degree 30' S at depths of 11 to 180 metres are given. The shrimp by-catch was also studied.

Relatório do cruzeiro realizado no Banco de Sofala pelo navio "Pantikapey" de 7-23/Junho/1981: peixes pelágicos e fauna acompanhante de Carapau e Cavala

This report of the research cruise (7 to 23 June 1981) surveying pelagic marine resources of the Sofala Bank (Mozambique) describes the size composition, distribution, length-weight relationships and sex-ratio of the fish captured. Decapterus russellii, D. macrosoma, Selar crumenophthalmus and Rastrelliger kanagurta represented 21.7% of the total catch. The by-catch was also studied.

Relatório do cruzeiro realizado no Banco de Sofala pelo navio "Pantikapey" de 21 de Julho a 7 de Agosto de 1981: peixes pelágicos e fauna acompanhante de Carapau e Cavala

This report of the research cruise (21 July to 7 August, 1981) surveying pelagic marine resources of the Sofala Bank (Mozambique) describes size composition distribution, length-weight relationships and sex-ratio of the fish captured. Decapterus russellii, D. macrosoma, Selar crumenophthalmus and Rastrelliger kanagurta represented 21.7% of the total catch. The by-catch was also studied.

Camarāo de profundidade: relatório dos cruzeiros realizados com o n/i "Ernst Haeckel" em Agosto-Setembro 1980, Novembro-Dezembro 1980, Janeiro-Fevereiro 1981, Janeiro-Fevereiro 1982

Reports of cruises carried out off Mozambique between parallels 21 degree 00 and 26 degree 20'S and at depths of 400 and 800 meters including abundance indices, catch composition, geographic and bathymetric distributions of shrimp catches are presented. The main species found were Hymenopenaeus triarthrus and Aristeomorpha foliacea which represent 64 to 72% of total catches.

Relatório do cruzeiro realizado no Banco de Sofala no barco "Meleia" em Agosto de 1981: camarāo de águas pouco profundas

The geographic and bathymetric distribution of the shrimps Penaeus indicus, Metapenaeus monoceros, P. japonicus and P. monodon along the coast of Mozambique are given. Biological data of the main species P. indicus and M. monoceros are presented.

Relatório do cruzeiro realizado no Banco de Sofala no barco "Meleia" em Agosto de 1981: fauna acompanhante de camarāo

This cruise report describes the Sofala Bank (Mozambique) crustacean stocks and the fish by-catch. A survey was made of the stock assessment of demersal fish with commercial interest, fishing grounds, biology and distribution of the most abundant demersal fishes and the specific composition of trawl catch areas.

Relatório do cruzeiro realizado no Banco de Sofala pelo navio Pantikapey em Julho-Agosto de [1981]: peixes demersais

Thanks to an agreement between the Institute of Fisheries Research of Mozambique and the Soviet part Azcherniro and Ingribpomrazvedka, surveys in the waters of Mozambique were conducted from June to August 1981 on the ship Pantikapei. The survey made along the Sofala Bank and Boa Paz (16°00-21°00'S) was at a depths of 11 and 90 meters. Demersal and pelagic fisheries experiments were conducted using acoustic devices. This paper described the results obtained on demersal fishery resources.

Relatório do cruzeiro realizado no Banco de Sofala pelo navio SRTM "Sebastopolsky ribak" de Setembro a Outubro de 1982: camarāo de águas pouco profundas

In September-October 1982, the Soviet ship "Sebastopolsky Rybak" conducted a cruise on the Sofala Bank in the area between 16°20'S and parallel 19°40'S. Two surveys were made, one from South to North (depth 10-110 meters) and vice versa. The type of coverage used was systematic. The Sofala Bank was divided into seven sub-areas. During this cruise sub-areas 3 and 4 were covered. Sub-area 5 has not been fully covered.

Relatório do cruzeiro realizado no Banco de Sofala pelo navio SRTM "Sebastopolsky rybak" de Novembro a Dezembro de 1982: camarāo de águas pouco profundas

From November 18th to December 17th 1982, the SRTM "Sebastopolsky Rybak" carried out research cruises on the Sofala Bank in the area between 16°20'S and parallel 19°40'S. The authors analyze data collected on biological characteristics, sexual maturity and localization of Penaeus indicus, Metapenaeus monoceros, Penaeus japonicus, Penaeus monodon and Penaeus latisulcatus.

Studies on cultural conditions of marine Chromatium buderi Truper and Jannasch 1968

Photosynthetic characteristics of a purple sulfur bacterium, Chromatium buderi, cultured under different ranges of pH, temperature, light intensities and ammonium chloride concentrations were examined. Maximum bacteriochlorophyll a synthesis was observed at pH 6.5 whereas the optimum growth was at pH 8.0. In general, higher temperature tended to inhibit the chlorophyll a synthesis and growth. 30°C is the optimum temperature both for chlorophyll a synthesis and growth. At 25µE mˉ²Sˉ¹ the bacteriochlorophyll a content and growth attained maximum level. The response to this low light intensity is an adaptation that ensures a high photosynthetic rate for the purple sulfur bacterium that usually occurs in dimly lit environment. Besides these, ammonium chloride at low concentration enhances both chlorophyll a synthesis and growth. Above 0.5% of it causes the nitrogen-chlorosis and also retards the growth of the bacterium. Possible chemical and structural mechanisms involved are discussed.

Retail prices of split, smoked, dried bream and dried Lake Tanganyika sardines at Lusaka markets, 1968-1970

This paper reports the results of a retail price survey at Lusaka markets on split, smoked, dried bream (Tilapia spp.) in 1968-69 and dried Lake Tanganyika sardines (Limnothrissa miodon and Stolothrissa tanangicae) in 1969-70. During the survey periods the average prices of these products maintained a level 70% to 130% higher than those fixed by the Government. Price fluctuations in relation to season, size and quality of the products were discussed. The prices were affected by season and size of the products but not by quality in terms of appearance and smell of the non-cooked products.