Insect Colonization and Mass Production. Edited by Carroll N. Smith. New York and London: Academic Press, 1966. xxii, 618pp. $27.00.

Excerpt: The mass production of insects appears to have started with the requirements of the rod-and-line fisherman for bait. For many years, using crude but effective methods, an individual could earn a living rearing millions of blowflies a week to meet this demand. The recent rise of the insecticide industry- and now, biological control--has meant an ever-increasing demand for many insect species. Not only does the testing of insecticides demand very large numbers of standard insects, but their release, either as parasites to control an economic pest, or as sterile males to \u27use up\u27 wild females, involves the laboratory production of millions of specimens per week

Growth response and survival of F1 hybrid fry of Heterobranchus longifilis and Clarias gariepinus reared in glass aquaria and plastic basins

The growth response of F1 hybrid fry of female Heterobranchus longifilis and male Clarias gariepinus were investigated under laboratory conditions in glass aquaria glass tanks and plastic basins. The larvae were produced artificially after inducement with Ovarptim. The hatching percentage was very high. Weekly mean length and weight were monitored for 6 weeks. The average length increase was higher in aquaria glass tanks than in plastic basins. However, there were depressed and irregular weight increases in both types of rearing troughs while significant weight increase (P<0.05) was recorded at week 6 in the plastic basin. Generally, the growth rate and survival in both containers were not significantly differen

Status of policies on fish hygiene in Nigeria

An examination is made of fish health policy formulation in Nigeria. Such policies are necessary to protect fish a living aquatic resources and also fish food at harvest because of the immense nutritional, social and economic benefits derivable by man from fish. Fish health policies must recognize the implications of aquatic environment pollution, the dangers of bad fishing methods and application of harmful fishing gears and appliances and post-mortem handling practice

Periodic orbits for space-based reflectors in the circular restricted three-body problem

The use of space-based orbital reflectors to increase the total insolation of the Earth has been considered with potential applications in night-side illumination, electric power generation and climate engineering. Previous studies have demonstrated that families of displaced Earth-centered and artificial halo orbits may be generated using continuous propulsion, e.g. solar sails. In this work, a three-body analysis is performed by using the circular restricted three body problem, such that, the space mirror attitude reflects sunlight in the direction of Earth’s center, increasing the total insolation. Using the Lindstedt–Poincaré and differential corrector methods, a family of halo orbits at artificial Sun–Earth L2 points are found. It is shown that the third order approximation does not yield real solutions after the reflector acceleration exceeds 0.245 mm s−2, i.e. the analytical expressions for the in- and out-of-plane amplitudes yield imaginary values. Thus, a larger solar reflector acceleration is required to obtain periodic orbits closer to the Earth. Derived using a two-body approach and applying the differential corrector method, a family of displaced periodic orbits close to the Earth are therefore found, with a solar reflector acceleration of 2.686 mm s−2

Screening the 'War on Terror' : the politics and aesthetics of torture in American and European cinema

Cinema and society interact. This given becomes fascinating when socio-politically sensitive issues are adapted in films that confront spectators with the frames of reference they use to make sense of society. This thesis studies how North-American and European films depict political torture in the context of the ‘War on Terror’. It starts from the debate that was held in the political and public domain concerning the actual torture of suspects of terrorist activities, and analyses political torture in film as a fictionalised, stylised form of such violence. In this way, it shows how public debates, politics, and art convene in cinema to engage with contemporary realities we, as societies, find difficult to witness and process. The analyses focus on War on Terror films made between 2004 and 2012. They incorporate ethical, political, and moral questions about the use of political torture, while addressing the West’s share in the geopolitics of the War on Terror. Ultimately, contributions are made to the fields of film narratology and cultural theory, as well as to current debates about the role of cinema in society: cinema as art object, as commercial artifice, and as commentary on socio- politically sensitive issues

Extruded flakes from pearl millet (Pennisetum glaucum)-carrot (Daucus carota) blended flours-production, nutritional and sensory attributes

Open Access JournalMillet flour (M) and carrot flour(C) were produced and blended in the ratios 100M:0C, 95M:5C, 90M:10C, 85M:15C and 80M:20C respectively to produce extruded flakes. The composite flours were subjected to analysis of the proximate and mineral composition, as well as functional and pasting properties. Extruded flakes were analyzed for proximate composition, total carotenoids, colour and sensory evaluation. There was no significant difference (p > 0.05) in the proximate, functional and pasting properties but there were significant differences (p 0.05) affected by extrusion cooking. In terms of the lightness (L*), redness (a*) and yellowness (b*), 100% millet flakes had the least values of 50.09, 0.076 and 10.39 respectively. Sample with 85M:15C had the overall acceptance score of 7.25. In terms of colour and taste, the sample with 90M:10C had the highest scores of 8.50 and 6.50 respectively. Sample with 85M: 15C was most preferred in terms of crunchiness. The results indicate that pearl millet and carrot are rich in different nutrient when blended in the right proportions to make composite flour, it would produce nutrient-dense food product rich in protein, vitamin Aand minerals