Effect of furanace on the development of larval stages of Penaeus monodon Fabricius

Zoea 2(Z SUB-2 ) Mysis 1 (M SUB-1 ) and Postlarva 1 (P SUB-1 ) of P. monodon artificially spawned in closed-system concrete hatchery tanks were bioassayed for their tolerance to the antibiotic furanace. The setup consisted of four 20-liter capacity plastic basins previously conditioned for 15 days with freshwater in full sunlight. During the experiment, each basin was filled with 5 liters of seawater to which was added filtered Chaetoceros and Brachionus to give densities of 5 . 0-7 . 5 x 10 SUP-4 cells/ml and 10-20 individuals/ml, respectively. The following are the properties of the water used throughout the experiments: salinity, 26-32%; pH, 7 . 3-8 . 4; temperature, 25-30 degree C; dissolved oxygen, 4 . 5-8 . 4 ppm; nitrite, 0 . 36-0 . 99 ppm; and ammonia, 0 . 10-0 . 30 ppm. To each basin were added 50 healthy larvae of specific stages of P. monodon. After an initial acclimation of one hour in the medium, preweighed amounts of the antibiotic were added and thoroughly dissolved. The concentrations tested were 1 . 0, 2 . 0 and 3 . 0 ppm. One basin always served as control. After 24 hours of exposure, the surviving population in each basin was counted. The survivors were then examined thoroughly under the microscope for unusual behavior and morphological defects brought about by the exposure. To minimize wide variations in the medium as a result of feeding and other manipulations, the systems were all prepared at 9:00 a.m. each time, and the feeds on two instances, one at 5:00 p.m. and another at 5:00 a.m. Fifteen trials conducted with Z SUB-2 showed survival ranges of 68% to 98% with a mean of 77 . 6% in the controls; 32% to 94% with a mean of 65 . 7% at 1 ppm, and 0% to 56% with a mean of 36 . 5% at 2 ppm. There were no survivors at 3 ppm. Interpolation from the survival-dose curve gave a 24-hr LC SUB-50 of approximately 1 . 6 ppm

Bacteria from seawater used in Penaeus monodon larval cultures

Bacteria in the seawater used in P. monodon hatchery operations were isolated on Bachmann's agar. The total plate counts in 25 isolations ranged from 1.0 - 5.0 x 102 to 5.1 -10.0 x 105 cells per ml. Out of 124 isolates, 98 (79 percent) were Gram-positive and 26 (21 percent) were Gram-negative. Micrococcus and Staphylococcus were dominant in the former group, while Acinetobacter, Moraxella, Flavobacterium and Alcaligenes were most numerous in the latter. Twenty-nine of the Gram-positive isolates closely resembled Peptostreptococcus, Planococcus, and Pediococcus

(De)signs for dignity: Towards an enabling environment in Athens, Greece

In spite of regulations aimed at ensuring that all people can enter and move through spaces, the need to create physical solutions that do not separate or segregate disabled populations has been overlooked. Further, the response of architects and designers is often to meet these regulations without considering the emotional impact of their designs, or the need for all users to be able to retain a sense of dignity as they enter and move through buildings and open spaces. This gap calls for a (re)generation of the urban form with a totally new agenda. My research argues that designing spaces for disability should focus on designing places for dignity. Aimed at upcycling everyday environments as enabling environments, this research identifies and comparatively analyses typologies of apartment buildings and neighbourhoods in Athens, Greece, where the experience of dignity is ubiquitously threatened due to a planning pathogenesis. Here, typologies are evaluated using dignity-based criteria, and new design guidelines and actions are proposed. This research and its findings will enrich access-knowledge through their innovative urban design paradigms with the potential to transform spatial environments into dignified spaces for all

lntertexts as Topoi of constant presence of memory within the here-and-now of the text: The case of George Heimonas

Language is characterised by both its present and its memory. Memory is the cognitive reflection of the cultural and historical past and determines the present of language in the level of grammatical structure and that of linguistic terms (fossils). The power of language is found in the depth of the contents of memory. Within this framework the writer develops a creative relation with language, as proof of creative inscription. Consequently, the here-and-now of language is determined by the creative employment of memory, in which a decisive factor is represented by intertextuality (intertextuality according to Beaugrande and Dressler or transtextualite, according to Genette). Within the framework of modern Greek literature, George Heimonas (1936-2000) belongs to the most promiment and most creative writers, in whose work intertextuality becomes a complex and therefore extremely interesting phenomenon, in the following manners: (i) as citations (intertextuality according to Genette) of other texts within his own texts (texts by Heracleitos, Homer's Iliad, Aeschylus' Agamemnon, Sophocles' Electra, Euripides' Medeia and D. Solomos' Lambros. (ii) as intertexts in the dimension of hypetextuality (hypertextuality according to Genette ), that is in the relation that links Heimonas' texts and other previous texts; amongst them, Aeschylus' Seven Against Thebes, the imaginative demotic song Of the dead Brother, the Celtic ballad of the 3th century under the title the Prophecy of Guenc Hlan. Such intertexts serve the structure and the aesthetics of Heimonas' text, within a completely new system of thematic informatio

Response to New Market Opportunities: The Case of the Overseas Employment Sector

This paper seeks to estimate the fund requirements of migrating overseas workers and analyze the variations according to occupation, skill level and destination of overseas workers. It also determines the manner in which migrating workers raise the funds to cover recruitment costs such as the use of savings, sale of properties and borrowings and analyzes the importance and contribution of different types of lenders and the terms and conditions of borrowing for each.overseas contract workers, employment opportunities

A suctorean parasite of Penaeus monodon larvae

Extended abstract only.A new disease caused by a suctorean has been observed in tank-spawned and reared P. monodon larvae. Identification of the etiologic agent pointed to Ephelota gemmipara R. Hertwig, a species commonly found to inhabit hydroid colonies

Current fish disease problems in the Philippines and their economic impact

An account is given of fish disease problems facing the aquaculture industry in the Philippines. The Laguna de Bay fish kills that occurred in December 1985 and February 1986, involving epizootic ulcerative syndrome of bottom dwelling fish species, and the economic impact on the industry are discussed in particular. Soft-shelling disease of giant tiger prawn (Penaeus monodon), gas bubble disease and various other bacterial disease problems are also considered

An ancient cityscape and its people: A study of ancient Hermione. Introductory remarks on historical sources and visible remains, archaeological research and prospects

This article provides a brief introduction to the area of the Hermionid and the research that has been carried out in ancient Hermione. The main textual sources are presented, as are the still-visible archaeological remains and the results of important rescue excavations. The contribution outlines the scientific framework of the project that has generated the five articles that follow, and closes with an agenda for future development for the exploration and preservation of ancient Hermione.</jats:p