217,044 research outputs found
Sea bass, groupers and snappers
No full textStudies on sea bass (Lates calcarifer) broodstock were directed at techniques to maximize egg production. Now known are the: optimum luteinizing hormone releasing hormone analogue (LHRHa) dose range to induce spawning, optimum egg size responsive to LHRHa induction, appropriate time for induction, proper storage conditions for LHRHa, and induction of spermiation in males. Gonadal maturation and spawning are successfully induced by LHRHa and/or 17 alphamethyltestosterone. An experiment on photoperiodic induction of sexual maturation is being conducted to produce seed year round. Increased information on larval morphology and physiology of sea bass led to improvements in feeding strategies and transport techniques. Studies on nutrient requirements and practical diets are currently being undertaken for different stages/sizes of sea bass. An economic assessment found an integrated sea bass production system viable.
Studies on groupers (Epinephelus spp.) have been geared towards broodstock development including induction of sex inversion by hormonal control, intraspecific interaction, and sex control using synthetic anabolic steroids. Spontaneous maturation and successive spawnings of captive Epinephelus suillus were achieved in 1990. Larval rearing techniques used for other marine fish species were tried but with limited success. Culture techniques in ponds and floating cages using SEAFDEC-formulated diets or commercial pellets are being developed.
Studies on snappers (Lutjanus spp.) have been started with the identification of species common in Panay Island
Bass Culture
No full textAs P-I for the AHRC project Bass Culture (£533,032), Riley’s research involves locating, capturing and preserving memories, experiences and ephemera from three generations of musicians, music industry participants and audience members. The associated communities and networks have played a key role in transforming Britain into a multicultural society, yet their contributions have previously remained absent from the country’s cultural institutions. The output components draw on original interviews, new and archival imagery to inform both a large- scale multimedia, interdisciplinary exhibition at Ambika P3 (Bass Culture 70/50, 2018), and a collaboratively produced documentary film (Bass Culture, 2018). Included are a wide range of oral testimonies and previously unseen images (representing over 50 years of London-based content) that explore and make manifest reference points connecting the influence of British sound-system culture to modern and contemporary music, fashion and cultural forms today. Riley’s book chapter (2014) draws on his experiences as a black British musician of Jamaican heritage to contextualise the origins and emergence of black British music in the 1970s and 1980s against the socio-political backdrop of the era. Riley devised a methodology for working together with wide-ranging collaborators to break down and classify areas of interest, without disenfranchising the participants or co-researchers. In creating the online resource, the project’s researchers were able to apply key categories that helped guide navigation of the complex layers of material, cultural and economic activity underpinning key values that were shared within the community, while mapping the contribution for academia. The Bass Culture project successfully united academics, museums and the African Caribbean community in a series of projects that helped make visible the Jamaican contribution to British popular music and culture and lay the basis for popular music teaching that more accurately reflects that influence
Broodstock management and seed production of the rabbitfish Siganus guttatus (Bloch) and the sea bass Lates calcarifer (Bloch)
No full textThis paper reviews results of studies conducted on the rabbitfish, Siganus guttatus (Bloch) and the sea bass Lates calcarifer (Bloch) at the Aquaculture Department of the Southeast Asian Fisheries Development Center. Studies include broodstock development and management, induced breeding, effect of handling stress and diet on egg quality, early life history, food, feeding strategy, weaning to artificial diets, effect of stocking density and salinity on egg development, larval growth and survival, and advancement of metamorphosis in sea bass by using thyroxine.
A seed production technique had been developed for rabbitfish with survival rates ranging from 5-35% while the seed production technique for sea bass developed in Thailand had been modified to suit local conditions. Based on results from recent morphological and physiological studies, the stocking density, water management, and feeding scheme for the production of rabbitfish and sea bass fry had been modified to reduce cannibalism and improve survival
Evaluation of various dietary supplements and strategies to enhance growth and disease management of hybrid striped bass Morone chrysops x M. saxatilis
No full textThe US hybrid striped bass (Morone chrysops x M. saxatilis) industry has been
negatively impacted by infectious diseases because there are very few approved drugs
and vaccines. Therefore, a series of experiments was conducted to explore the potential
use of various dietary supplements including autolyzed brewers yeast, the commercial
prebiotic GroBiotic��, oligonucleotides and levamisole for improvement of hybrid
striped bass growth, immunity and resistance to disease caused by various pathogenic
bacteria.
In two trials with brewers yeast, fish fed diets supplemented with yeast at 2%
generally showed enhanced weight gain and feed efficiency compared with those fed a
basal diet. Brewers yeast also positively influenced resistance to S. iniae infection. In
addition, results of immune response assays demonstrated that brewers yeast can be
administered for relatively long periods without causing immunosuppression.
GroBiotic�� (Grobiotic) also resulted in significantly enhanced weight
gain, innate immune responses and resistance of juvenile hybrid striped bass to S. iniae
infection. An additional experiment with sub-adult fish showed significantly reduced
mortality of fish fed a diet supplemented with GroBiotic�� at 2% when subjected to an in-situ Mycobacterium marinum challenge. This is the first report of positive effects from
dietary prebiotics for fish health management, although many fundamental questions
should be pursued further.
Dietary supplementation of a commercial oligonucleotide product (Ascogen P��)
at 0.5% of the diet was shown to enhance resistance of hybrid striped bass against S. iniae
infection and increased their neutrophil oxidative radical production. However, the effect
on growth was marginal.
Dietary levamisole supplementation at a low level (100 mg/kg) enhanced the
growth and feed efficiency of juvenile hybrid striped bass. However, an elevated dosage
(1000 mg/kg diet) strongly suppressed growth, feed intake and feed efficiency.
Hypothesized beneficial influences, including antibody production and resistance to S.
iniae and A. hydrophila were not substantiated. Although dietary levamisole increased
fish macrophage respiratory burst, an in vitro study failed to show a direct effect on
cultured macrophages.
This suite of studies demonstrated the potential use of some dietary supplements
to enhance hybrid striped bass production. Thus, immunonutrition represents a valuable
strategy to apply in aquaculture
Bass Culture film
No full textThe film ‘Bass Culture’, uniquely identified the musicians and industry professionals required to voice the creativity, across five decades of new musical genres. Driven by the perspective of youth, the film starts in the present and journeys back to the late 1950. Important to this film is the unbroken inter generational explanation, of the birth of, the most significant black British music genres since the 70s. All content was cross-checked with chart and sales data, industry experts and audience accounts
PREFERENCES OF MID-ATLANTIC SEAFOOD BUYERS TOWARD FARM-RAISED HYBRID STRIPED BASS
No full textA market survey of three mid-Atlantic food-fish market levels was conducted to provide information on finfish buyers' market characteristics, finfish attribute preferences, and buyers' attitudes toward farm-raised hybrid striped bass. Results showed that most firms are located in the suburban areas, and they purchased their fish from producers and wholesalers. Quality was rated as the most important finfish attribute; and, aside from restaurants, buyers are generally familiar with hybrid striped bass and indicated that it could easily be substituted for wild striped bass. Most buyers were either not sure or feel hybrid striped bass could not substitute for other fish species although they all expressed a willingness to offer farm-raised hybrid striped bass. Finally, the possibility of fish farmers selling directly to all market levels has great potential if the fish size is around two to three pounds and the form is whole for the wholesaler and retailer and fillet for the restaurants.Consumer/Household Economics,
An elecrophoretic evaluation of bi-subspecific populations of largemouth bass in small impoundments in Texas
No full textTypescript (photocopy).During 1978-1983, samples of largemouth bass Micropterus salmoides were taken from 10 small impoundments (0.4 to 16.0 hectares) in north-central, south-central, and southwestern Texas and submitted to electrophoretic analysis to determine individual genetic status. These impoundments consisted of seven farm ponds and three U.S. Soil Conservation floodwater retarding structures which had been stocked with northern largemouth bass M. s. salmoides and/or Florida largemouth bass M.s. floridanus in an effort to establish stable populations of both subspecies and the intergrade. Stocking rates varied between ponds and were determined by size of impoundment, fish populations present at time of stocking, and research objectives. Stable intergrading populations did not result from the stocking regimes used in this study. In all populations studied, one subspecies or the other was effectively excluded with the formation of the first year class of largemouth bass. In 8 of 10 populations, northern largemouth bass were dominant, while Florida largemouth bass dominated the remaining two populations. Subspecific domination was the result of combined effects of differential subspecific growth, survival, and reproductive success. As a result of subspecific domination, maximum heterozygosity can only be attained through restocking of the less successful subspecies. Restocking may have to take place at intervals as short as 2 years. Comparisons of growth of northern largemouth bass and F1 intergrades indicated that northern bass attained greater total length at age I. However, F1 intergrades demonstrated significantly faster growth after age I. Total length of F1 intergrades approached or surpassed that of northern largemouth bass at age II. Evaluations of the efficacy of electrofishing and/or angling in attaining representative genetic samples from intergraded populations were conducted in four impoundments. No systematic sampling bias which could be related to discrete genotypes of individuals was found in samples collected using either of these two gear types. Differences between estimates of allele and genotype frequencies and actual population allele and genotype frequencies would not lead to formulation of improper genetic management strategies. Evaluation of the utility of lateral-line scale count as an indicator of genetic status of individuals indicated that this meristic count is of little value. . . . (Author's abstract exceeds stipulated maximum length. Discontinued here with permission of author.) UM
Rev. Dr. George M. Bass
No full textThis image shows Rev. Dr. George M. Bass at the 1974 Minnesota Synod Convention
Philosophy and Psychoanalysis. Questions and Answers
No full textPhilosophy and Psychoanalysis. Twelve Questions and Answers to A. Zupančič, M. Coelen, J. Webster, J.-L. Nancy, F. Leoni, D. Nobus, S. Benvenuto, A. Bass, L. De Fiore
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