Report on the oceanographic investigations carried out at the Sofala Bank by the Soviet trawler "Sevastopolsky rybak" in September-December 1982

In September-December 1982 a fisheries research cruise was carried out at the Sofala Bank by the SRTM "Sevastopolsky Rybak". Oceanographic investigations have been conducted in association with the fisheries research. Three coverages were made of the Sofala Bank each lasting for slightly less than three weeks. This will allow for three descriptions of the oceanographic conditions in the area, with some reference being made to variability. This paper is just a preliminary report of those investigations.

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.

Camparaçāo entre os cruzeiros de investigaçāo realizados no Banco de Sofala pelo navio SRTM "Sebastopolsky rybak" em Setembro-Outubro e Novembro-Dezembro de 1982: camarao de [águas pouco profundas]

During the last 4 months of 1982, two research cruises had been carried out at the Sofala Bank by the SRTM "Sevastopolsky Rybak". The authors analyze and compare data on biological characteristics, sexual maturity and localization of Penaeus indicus and Metapenaeus monoceros.

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.

Circulation system and areas of potentially successful tuna fishing with surface methods off Mozambique

Charts with 3-months running means of thermal data collected during 1977-1982 are used to describe the seasonal variability of the circulation pattern off Mozambique, and to identify the areas of tuna vulnerability to surface gears. The main conclusions reached by Sætre and Jorge da Silva (1984) have received further support. Areas of potentially successful exploitation of tunas by surface methods have been identified during the whole year, with emphasis for November-April.

Mortality rates estimates for Metapenaeus monoceros (Fabricius) of Maputo Bay

The species Metapenaeus monoceros in Maputo Bay recruits to the fishery almost all over the year, but the main recruitment occurs over a short period of time, each year, during April-May. Growth curves were constructed by following the progression of modes over a period of time. The von Bertalanffy growth parameters were estimated as L∞=31.9 mm and K(monthly)=0.25, for males, and L∞=48.3 mm and K(monthly)=0.14, for females (Brinca and Sousa, 1984). Using data on growth and length composition of the catches, the following methods were applied to estimate mortality rates of M. monoceros: estimation of natural mortality by using approximative methods; use of c.p.u.e. data; catch curves; cohort analysis; average age and length methods.

A study on growth of Metapenaeus monoceros (Fabricius) of Maputo Bay

Biological data on Metapenaeus monoceros has been regularly collected in Maputo Bay since 1968. The main objective of this report is to study growth as a function of the size, since this is one of the basic parameters for population dynamics. As the possibility of studying shrimp growth by modal progression analysis depends very much on the space-time configuration of sampling, the years 1968 and 1969 were chosen to study growth of the population available to the bottom trawl used by the fishing industry. In those years sampling was very frequent (twice a week) and the samples were collected from a rather small fishing area. Complementary data on the spawning, juvenile phase and recruitment to the fishery was used to establish the relationship between the different stages of the life cycle and to obtain an age/length key. Data on juveniles in estuaries was only available for 1969 and 1973.

Hydrology and fish distribution at the Sofala Bank (Mozambique)

A brief review is made of the hydrologic conditions at the Sofala Bank, mainly based on the research data obtained from 1978 to 1982. A description is attempted of the circulation pattern and the distribution of water masses in the area, four hydrologic regimes being identified. These are compared with the distributions of different pelagic and demersal fish species. A tendency is found for different groups of species to prefer different hydrologic regimes.

A preliminary assessment of the scad and mackerel stocks at Sofala Bank, Mozambique

Scads (Decapterus russellii, D. macrosoma, Selar crumenophthalmus), Indian mackerel (Rastrelliger kanagurta) and horse mackerel (Trachurus trachurus) are the main pelagic species caught in a bottom trawl fishery at Sofala Bank and at Boa Paz. Information on catch and effort is presented together with available data on distribution, spawning, size at first maturity, growth, mortality and biomass of the species. As the present catch and fishing mortality are low compared to the estimates of biomass and total mortality it is concluded that the fishery may be expanded further in the future.

La Bibliografía Científica de Fernando de Buen.

Si bien existen varios ensayos biográficos que enfocan diferentes momentos de su vida (ANÓNIMO, 1963, BAHAMONDE, 1962, LÓPEZ et al., 2015, NION, 2015, PEQUEÑO, 2015, SÁNCHEZ CARRILLO, 2001), hasta donde tenemos conocimiento, no se ha publicado aún una bibliografía completa de la obra del Dr. FERNANDO DE BUEN Y LOZANO (Fig. de tapa). Bibliografías parciales se encuentran, entre otros, en los autores arriba citados. Aquí nos atrevemos a hacer el intento, aunque en forma defectuosa, ya que muchas de sus publicaciones no las hemos podido consultar directamente (se señalan con un asterisco, *). En parte nos hemos basado en una compilación hecha por el propio DE BUEN, que abarca los años 1915 a 1949 (Fig. 1), aunque no siempre con los datos necesarios para una completa información sobre la publicación; en lo posible intentamos complementarla. En sus casi cincuenta años de actividad científica, llegó a producir casi 300 títulos, de variado contenido, aunque siempre relacionados con el medio acuático, sea marino o dulceacuícola. Esta producción se puede dividir en cuatro períodos, que comienza con su etapa española, europea y africana (marroquí), entre 1915 y 1937, durante la cual publicó más de 140 títulos. Como consecuencia de la Guerra Civil Española, en 1939 se radica en México, donde permanece desde el 12 de Julio de 1939 hasta Noviembre 1946, país al que regresa entre 1953 y 1957. Durante este período escribe unos 70 artículos. Entre esas dos etapas mexicanas, estuvo brevemente radicado en el Uruguay, desde el 26 de Noviembre de 1946 hasta 1953, sin duda la etapa de menor producción científica, con una docena trabajos. A ésta sigue el último período de su vida, en Chile (Fig. 2), la que lamentablemente termina trágicamente, en 1962. Durante este período publica más de 60 publicaciones, de los cuales, aparentemente, seis quedan inéditas. Cabe señalar que durante estas tres etapas de exilio americano, si bien sus publicaciones están mayoritariamente relacionadas con el país de residencia, hay algunas excepciones. Preivo a estas estadías en América, hay que mencionar tres europeas, fuera de España, a saber: en el Museo Oceanográfico de Mónaco (1919), en el Instituto Centrale di Biologia Marina, Messina, Italia (1919), y en el Laboratorio Arago, Banyuls sur Mer, Francia (1939). En general, puede considerarse que FERNANDO DE BUEN fue un investigador solitario, ya que solamente seis, de sus casi 300 trabajos, fueron publicados en colaboración: dos con su hermano SADÍ DE BUEN (#31 y 32), dos con F. FRADE (#115 y 116), y dos con MANUEL ZOZAYA (#162 y 176). En su obra científica hemos podido identificar la descripción original de 12 géneros, 9 subgéneros, 54 especies y 11 subespecies, como se indican en la Tabla I.

Ecballocystopsis dichotomus sp. nov. (Chlorococcales, Chlorophyceae) from China

Ecballocystopsis dichotomus sp. nov. is the third described species of Ecballocystopsis that grows on rock under water and epiphytically on the filaments of Cladophora and Mougeotia (green algae) collected in a small irrigation ditch in Chong-yang county, Hubei Province (East longitude 29 degrees 30', North latitude 114 degrees 10') and in Zhu-xi county, Hubei Province (East longitude 32 degrees 20', North latitude 109 degrees 45'). The new species differs from E. indica IYENGAR (1933) in having dichotomous branching and its smaller sized thallus; it differs from the second species, E. desikacharyi PRASAD (1985), in having looped filaments, dichotomous branching and smaller cells. Three patterns of cell divisions were observed in E. dichotomus sp. nov. (transverse, longitudinal and oblique). It may be that the new species is evolutionary a more advanced species based upon the structure of its thallus and the manner of spore formation. The systematic position of the genus, based on the comparative studies of the genus Ecballocystis BOHLIN with Cylindrocapsopsis IYENGAR, is discussed.

Suppression of zebrafish VEGF gene by cytomegalovirus promoter-driven short hairpin constructs induces vascular development defects and down regulation NRP1 expression

The usage of RNA interference for gene knockdown in zebrafish through expression of the small interfering RNA mediators from DNA vectors has created a lot of excitement in the research community. In this work, the ability of human cytomegalovirus immediate early promoter (CMV promoter)-driven short hairpin RNA (shRNA) expression vector to induce shRNA against vascular endothelial growth factor (VEGF) gene in zebrafish was tested, and its effects on VEGF-mediated vasculogenesis and angiogenesis were evaluated. Altogether four vectors targeting various locations of VEGF gene were constructed, and pSI-V4 was proven to be the most effective one. Microinjection of pSI-V4 into the zebrafish embryos resulted in defective vascular formation and down regulation of VEGF expression. In situ hybridization analysis indicated that silencing VEGF gene expression by pSI-V4 resulted in down regulation of neuropilin-1 (NRP1), a potent VEGF receptor. Knockdown of VEGF expression by morpholino gave the same result. This provided evidence that the VEGF-mediated angiogenesis in zebrafish was in part dependent on NRP1 expression. The results contributed to a better understanding of molecular mechanisms of cardiovascular development and provided a potential promoter for making inducible knockdown in zebrafish.

Psilídeos no Brasil: 5-Trioza tabebuiae em ipês.

2009

TabVida: sistema computacional para cálculo de parâmetros biológicos e de crescimento populacional de afídeos.

2010