Stocking densities of juvenile Brycon orthotaenia: production parameters and economic benefits in net cages

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Deposition of bodily chemical components in the carcass of tilapia (oreochromis sp.) strains

The knowledge of how animals deposited chemical components as water, protein, fat and ash in the carcass is importance for the formulation of a balanced diet, allowing maximum performance with a low environmental impact. So, the study was carried out to evaluate the influence of different tilapia strains (Chitralada, Commercial, Red and Universidade Federal de Lavras [UFLA]) on the deposition of bodily chemical components in the carcass. The bodily components analyzed were water, protein, fat and ash. For the determination of the bodily chemical deposition curves by age, the exponential, Brody, logistic, Gompertz and von Bertalanffy models were adjusted. The Commercial and UFLA strains deposited water at a faster speed (P<0.05) compared with the remaining strains. As for protein, the Red strain had a lower estimated maturity weight (49.37 g), and was more precocious (202 days) with regard to maximum deposition in comparison to the other strains (Chitralada, UFLA and Commercial) in which there was an estimated maturity weight of 231.5 g and maximum depositionfor 337 days. There were no differences (P>0.05) for the logistic model parameter between Red, UFLA and Commercial strains for fat, which presented a maximum fat deposition (0.23 g) at 310 days of age. Regarding ash deposition, the Commercial strain presented a higher maximum deposition (0.10 g) at 337 days, occurring later than the other strains that presented maximum deposition (0.033g) at 254 days of age. Thus, it was concluded that the genetic strains evaluated differ in chemical deposition curves of water, protein, fat and ash.

The German classics of the nineteenth and twentieth centuries : masterpieces of German literature, translated into English /

Chief of the board of translators: Isidore Singer. Cf. "Editorial organization".

„Welch werthvolle und kunstreich geschmiedete kleine Sache.“

Richard Schaukal (1874-1942) wurde als Dichter ignoriert, als Übersetzer geschätzt und als Literaturkritiker geachtet. Es ist erstaunlich, dass dieses Tätigkeitsfeld unvollständig aufgearbeitet ist, zumal bedeutende Exponenten der Zeit wie Thomas Mann, Hermann Hesse oder Rainer Maria Rilke Schaukal um Besprechungen ihrer Werke baten. Er verfasste für zahlreiche Publikationsorgane meist unbequeme Essays, die sich − mehr noch als seine dichterischen Arbeiten − in den Diskurs der kulturkonservativen kritischen Moderne einschrieben. Mit Blick auf seine frühe Phase als Literaturkritiker werden Richard Schaukals ästhetische Positionen, Einflüsse und Funktionen untersucht. Abschließend wird sein Aufsatz über Ferdinand von Saar (1899) einer exemplarischen Analyse unterzogen.

“Niemand zeugt für den Zeugen”. Temporalidad y memoria en la poesía de Paul Celan

El artículo analiza cómo Paul Celan, utilizando recursos arreferenciales y antimiméticos propios de la poésie pure y la poesía absoluta, desarrolla un modelo poético en el que la temporalidad y la memoria son determinantes. En el nuevo modelo, el lenguaje no constituye una realidad autónoma e inmanente; antes bien, se concreta en una acción dialógica y remite a una realidad extralingüística. El mismo texto poético configura un espacio del recuerdo, se erige en un lugar de memoria que, a través de las sedimentaciones históricas que arrastra el lenguaje, da testimonio de lo ocurrido.

An examination of the techniques used to capture mangrove crabs, Ucides cordatus, in the Mamanguape River estuary, Northeastern Brazil, with implications for management.

The present research, undertaken in a mangrove swamp in northeastern Brazil (Mamanguape River Estuary), examined the factors that led to the overwhelming acceptance of the tangle-netting technique by crab harvesters in detriment to the now illegal tamping technique. Both techniques are the only ones currently used at our study site and in many other areas in Brazil, despite being prohibited by law. Data were collected through direct observations to determine capture efficiency, productivity, daily production, selectivity, and harvesting effort, and through interviews with crab harvesters, focusing on their perceptions of the capture techniques, the conditions of crab stocks and the sales price of a dozen crabs. Our results indicated that the two capture techniques did not significantly differ in terms of their efficiency or productivity, but daily production rates differed significantly, being greater using tangle-netting. The tangle-netting permits a greater harvesting effort (6 hours and 34 min) compared to tamping (4 hours and 19 min). Tangle-netting is also less selective than tamping indicated by the larger number of captured smaller specimens, including females. This results in a lower average sales price for a dozen crabs caught by tangle-netting (US$ 0.95) compared to tamping (US$ 1.02). The greater daily production of crab harvesters using the tangle-netting technique nevertheless increased their net gain, explaining their preference for this method, Given that tangle-netting results in greater harvesting pressure but lower selectivity compared to tamping, it may potentially be less sustainable. All of the crab harvesters interviewed having more than 20 years of experience (n = 34) stated they perceived that stocks of U. cordatus had become reduced over the last 20 years, together with average crab sizes. It is now important to examine the structure of the local U. cordatus population and to assess its fishery to allow evaluating whether the illegal, but prominent tangle-netting and tamping mangrove crab capture techniques are sustainable or not. We further suggest improving the dialogue between decision makers and fishermen, which barely exists to date, to initiate a discussion about possible ways of resolving the current situation of illegality of the fishermen. This will be key to achieving effective sustainable co-management of this important natural mangrove forest resource.