Preliminary report on the coarse fishery status in the River Lune with particular reference to the Lansil Fishery

This study takes a preliminary step towards investigating the reports of poor rod catches of coarse fish in the River Lune. These poor catches and concern over the possible loss of coarse fish from the Lower Lune is investigated, using creel census data from 1991. Historical data is used where available for comparative studies. The conclusion that this report comes to is that there is a problem with the recruitment of coarse fish within the population. Dace, roach and bream all show good growth rates but only poor if any recruitment. Historical investigations suggest that roach and bream may never have successfully recruited without artificial induced conditions. The situation with dace is of more concern as populations in other rivers in Northern England are also in decline, whilst historically they were naturally recruiting.

Antes só do que mal (ou bem) acompanhado: um estudo sobre a representação social da mulher solteira no mundo feminino

Esse trabalho teve origem numa monografia de conclusão de curso de graduação em psicologia, e parte da constatação de que atualmente, nos grandes centros urbanos, o grupo de mulheres financeiramente independentes sem um companheiro é cada vez mais numeroso, tornando-se muito presente no nosso cotidiano e na mídia. A pesquisa teve como objetivo descrever, analisar e discutir a representação social da mulher solteira construída por 210 mulheres, com idades entre 20 e 49 anos, habitantes da cidade do Rio de Janeiro. A coleta de dados foi realizada pela aplicação individual de um questionário às participantes da pesquisa. O questionário consistiu na solicitação de tarefas de evocação, em seu contexto normal e de substituição, além de perguntas fechadas e abertas, e da obtenção de dados de caracterização sociodemográfica. Os dados coletados por meio da evocação livre foram processados com auxílio do softwareEvoc e analisados de acordo com a abordagem estrutural das representações sociais, segundo a qual os conteúdos cognitivos de uma representação se organizam em dois sistemas internos: um sistema central, também chamado de núcleo central, e um sistema periférico. A análise do questionário envolveu tratamentos estatísticos descritivos das respostas às perguntas fechadas e abertas, tendo sido estas últimas submetidas a um processo prévio de categorização temática. A representação da mulher com 30 anos ou mais, solteira e sem filhos, construída pelas mulheres em geral, é fortemente marcada por elementos contraditórios, mas sem deixar de caracterizar a mulher contemporânea. O conteúdo representacional evidencia uma dimensão imagética muito influenciada pela mídia, e expressa o sentimento de autonomia, refletindo o atual momento da mulher. Esse perfil de mulher, apesar de corresponder a uma mulher que rompe com o seu papel tradicional na sociedade e que tem um poder de escolha, ainda incorpora a imagem de encalhada, o que pode indicar a persistência de um grande conservadorismo por parte das próprias mulheres.

A preliminary assessment of water quality in fish cages on Lake Kariba, Zimbabwe

The water quality in fish cages on Lake Kariba was studied. The Kruskal-Wallis test was used to determine whether the water quality parameters differed significantly among the cage-types (cage-type effect). Secchi disc readings ranged from 2 to 4 metres, while temperature ranged from 23 degree C to 29.5 degree C. The observed conductivity was between 98.7 mu S/cm and 102.3 mu S/cm. The pH was between 6.31 and 7.82. Concentrations of dissolved oxygen varied from 1.55 to 6.47 mg/l, while dissolved oxygen saturation ranged from 22.3% to 83.1%. Within the same month, temperature did not differ significantly among cages. Conductivity, pH, dissolved oxygen concentration and dissolved oxygen saturation differed significantly among the 3 cage-types. Temperature and pH levels in the cages were close to the optimum levels for the culture of cichlids. Sub-optimal levels of dissolved oxygen occurred occasionally in the octagonal cages.

Building TRACE (translations censored) theatre corpus: some methodological questions on text selection

Editores:Micaela Muñoz-Calvo; Carmen Buesa-Gómez

Preliminary phytoplankton counts in the Sanyati Basin, Lake Kariba

Phytoplankton counts were made on a monthly basis on water samples, taken from one station in the Sanyati Basin. The results show seasonal fluctuations which are probably nutrient dependant. High phytoplankton numbers occur at times of high nutrient levels as was found with the crustacean zooplankton populations (Marshall 1980). Numbers also decreased with depth down to the thermocline. Below the thermocline there was little or no change in numbers.

A preliminary investigation of Elastomer Visible Implant (EVI)tag retention rates and the effect of tagging on the growth and survival of barbel (Barbus barbus L.).

The Elastomer Visible Implant system (EVI) is a relatively new technique for batch marking fish. The aim of this study was to assess retention rates and the possible effects of tagging on the growth and mortality of barbel, Barbus barbus, (81-197mm, fork length) over approximately 2 months using a syringe injection system.

Answering engineers' questions using semantic annotations

0890-0604

A preliminary study on the feasibility of using fenced brushparks for fish production in Lake Chilwa, Malawi

A study to investigate the feasibility of using fenced brushparks for fish ranching in Lake Chilwa was conducted for five months at the Kachulu Harbor. In a water depth of 1.4 m enclosures constructed from bamboo sticks embedded in the sediment and surrounded by a 13 mm seine net, were filled with three different subrates (Typha, bamboo, and Sesbania branches) and a no substrate enclosure served as a control. Netting materials contributed 57 per cent towards the total cost (US$ 0.24-0.30/m2) of brushpark contruction. Fish productivity was highest in the Typha, bamboo and control treatments and lowest in the Sesbania treatments. The decomposition of substrates did not affect water quality. The results indicate that enclosed brushparks may be a feasible technology for enhancing fish yields and providing alternative income sources to fisherfolk in small lakes and water bodies.

Preliminary results of a silver carp breeding program in Vietnam

The article describes the silver carp (Hypophthalmichthys harmandi and Hypophthalmichthys molitrix) breeding program in Vietnam.

Preliminary observation on culture of Penaeus monodon in low-saline waters

The feasibility of semi-intensive culture of Penaeus monodon in low saline environment was investigated by comparing the growth and production in low (0.16-6.52 ppt) and high (4.60-19.42 ppt) saline areas at two stocking densities (10.5 and 16 individuals/m super(2)). After 135 days of culture, yield of shrimp in low and high stocking densities was 1563.37 kg/ha and 2274 kg/ha, respectively, in low saline ponds, and 1173.00 and 1974.00 kg/ha, respectively in high saline ponds. Food conversion ratio (FCR, 1.31-1.58) and specific growth rate (SGR 21.04-21.19%) were higher in low saline ponds as compared to high saline ponds (FCR, 1.35-1.68; SGR, 19.22-19.88%). Growth of shrimp was satisfactory in low saline ponds even when salinity decreased after 60 days of culture to almost freshwater level (0.16 ppt) indicating the variability of semi-intensive culture of P. monodon in low saline environment.