13,799 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
Dietary vitamin E requirement of sunshine bass (Morone chrysops [] x M. saxatilis []) and apparent lack of interactions between vitamin E and selenium
No full textDue to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Includes bibliographical references: p. 23-29.Issued also on microfiche from Lange Micrographics.A 12-week feeding trial was conducted to determine the dietary vitamin E requirement of juvenile sunshine bass (Morone chrysops @ x M saxatilis d), and to investigate the possible interactions between dietary vitamin E and selenium. Sunshine bass initially averaging 1.8 ���0.08 g (mean ���s.d.) were fed semi-purified diets supplemented with 0. 2 mg S e/kg from Na2SeO3and either 0 (basal), 10, 20, 40, 60, or 80 mg vitamin E/kg as dl-(x-tocopheryl acetate. Fish fed the basal diet, which contained 5.8mg (x-tocopherol/kg dry weight, were darker in color and had reduced hematocrit values but did not exhibit reduced survival. Diets containing the lowest levels of vitamin E caused significantly (P<0.05) reduced weight gain and feed efficiency of fish compared to those fed diets supplemented with vitamin E at 20 to 80 mg/kg. Dietary supplementation of vitamin E caused incremental increases in the concentration of cc-tocopherol in both plasma and liver tissues. Regression analysis of weight gain data using the broken-line model indicated a dietary vitamin E requirement of 28 mg/kg dry diet. Two additional semi-purified diets containing either 0 or 60 mg vitamin E/kg without supplemental selenium also were included in the feeding trial and provided a 2 x 2 factorial arrangement to evaluate potential interactions between selenium and vitamin E. At the end of the 12week feeding trial, sunshine bass fed diets without supplemental vitamin E had significantly reduced weight gain and feed efficiency but selenium supplementation did not influence these responses. Dietary vitamin E and selenium also did not have significant effects on hematocrit of sunshine bass. Dietary vitamin E had a significant effect on plasma glutathione peroxidase (GSH-Px) activitv which was generally reduced at higher levels of vitamin E intake; however, dietary selenium had no significant effect on liver and plasma GSH-PX activity. Based on the results of this study, a dietary selenium deficiency was not induced and there were no interactions between dietary vitamin E and selenium in the nutrition of juvenile sunshine bass
Graduate recital, double bass. Bragg, M., 1994
No full textRecorded during a live performance at Dalton Center Lecture Hall, Western Michigan University, Kalamazoo, Michigan, March 13, 1994, 6:00 p.m., the 321st concert of the School of Music's 1993-1994 season.Michael Bragg, double bass ; with Elena Sharkova (1st work), Helen Lukan (2nd work), Susan Wiersma Uchimura (3rd work), piano.In partial fulfillment of the requirements of the Master of Music degree in performance, Western Michigan University, 1994.Information from performance program.Sonata no. 2, BWV 1028 / Johann Sebastian Bach -- Sonata no. 2 in E minor, op. 6 / Adolf Misek -- Concerto for double bass and orchestra (1948) / Eduard Tubin
Feeding ecology of 0-group sea bass Dicentrarchus labrax in salt marshes of Mont Saint-Michel bay (France)
No full text0-group sea bass, Dicentrarchus labrax, colonize intertidal marsh creeks of Mont Saint Michel Bay, France, on spring tides (e.g., 43% of the tides) during flood and return to coastal waters during ebb. Most arrived with empty stomachs (33%), and feed actively during their short stay in the creeks (from 1 to 2 h) where they consumed on average a minimum of 8% of their body weight. During flood tide, diet was dominated by mysids, Neomysis integer, which feed on marsh detritus. During ebb, when young sea bass left tidal marsh creeks, the majority had full stomachs (more than 98%) and diet was dominated by the most abundant marsh (including vegetated tidal flats and associated marsh creeks) resident amphipod, Orchestia gammarellus. Temporal and tidal effects on diet composition were shown to be insignificant. Foraging in vegetated flats occurs very rarely since they are only flooded by about 5% of the tides. It was shown that primary and secondary production of intertidal salt marshes play a fundamental role in the feeding of 0-group sea bass. This suggests that the well known nursery function of estuarine systems, which is usually restricted to subtidal and intertidal flats, ought to be extended to the supratidal, vegetated marshes and mainly to intertidal marsh creeks
A five-year study of the striped bass fishery of Maryland, based on analyses of the scales
No full textThe striped bass, or rock as the species is called in the Chesapeake area, ranks high in value and volume among the commercially important fish taken in Maryland waters and, in addition, is highly prized as a game fish by sportsmen. Interest in the marked fluctuations characteristic of the species stimulated the investigation begun in October, 1941
Variations in largemouth bass abundance and standing crop in floodwater retarding structures in central Texas
No full textTypescript (photocopy).Fish communities in 11 Soil Conservation Service floodwater retarding structures were studied to determine factors associated with variations in largemouth bass abundance and standing crop over a 15-month period. Petersen population estimates and biomass estimates for largemouth bass in fall 1979, spring 1980 and fall 1980 were compared with concurrent electrofishing, bag seine and gillnet catch data using Spearman rank correlation. Numbers per hectare of small (175-249 mm) and large (> 249 mm) bass in fall 1979, ranged from 6-1068 and 6-107 respectively. Numbers per hectare of small ( 249 mm) bass respectively in subsequent samples were as follows: spring 1980--9.1-1309.9 and 5.7-205.7; fall 1980--10.1-391.6 and 1.4-81.4. Biomass estimates (kg/ha) for small and large bass respectively ranged from 0.5-71.6 and 4.2-49.9 for fall 1979; 0.6-63.5 and 5.3-1000.3 for spring 1980; and 1.1-21.6 and 0.8-32.4 for fall 1980. Means of overall best estimates of biomass were 15.2 kg/ha for small fish and 16.6 kg/ha for large fish. Variations in bass abundance and standing crop were the result of fluctuations in recruitment. Abundance of small bass was greater in clear lakes. High spawning success was found in lakes with high abundance of large bass. Growth of young bass was density dependent, limited by forage availability and negatively correlated with water transparency. Abundance of these bass was correlated to abundance and size structure of other species. Inverse correlations with white crappie abundance suggested that predation by white crappie limited recruitment. Poor success of the 1980 year-class was probably due to heavy predation when water levels were low. Total bass biomass was highest in lakes with 40-60% bass proportional stock density (PSD). Abundance of large bass was correlated with diverse size structure of other species. Total bass biomass and PSD of bluegill and channel catfish were positively correlated. Bass PSD and PSD of bluegill, channel catfish and white crappie exhibited a non-linear relationship. A standing crop 20 kg/ha of large bass was necessary to adequately control abundance of other species. Bass populations in floodwater retarding structures could be improved through modification of structure design, proper stocking, habitat management to improve water clarity and controlled harvest
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
The Author/Translator Interactional Process. A Case Study
No full textSee Naples and Kill (1988) is a lively and colourful novel by the con-temporary English writer, Gregory Dowling, translated into Italian in 2015.
Following the tradition of translation studies (Venuti 2000, Bass-nett 2002, Cronin 2006), this paper analyses the rewriting process of literary translation, considering in particular the fruitful but sometimes tense and even conflictual relationship between writer and translator.
The translation of the novel See Naples and Kill was an ongoing rewriting process entailing a constant dialogue between the writer and the translator. Therefore, the study aims at answering two main ques-tions: what happens if the rewriting process of translation is constant-ly questioned by the author? What happens if the author has a good mastery of the target language and s/he is her/himself a translator?
By exploring the relationship between translation and re-creation, the research focuses on the differences and similarities between the primary creation (source text) and the secondary creation (target text), and aims to verify in which way the dialogic encounter of two different personalities and cultures does not make them merge but, by retaining their own uniqueness, leads eventually to their mutually en-riching each other. A comparative analysis of the source text and the different drafts of the translated version accompanied by the author’s comments will shed light on the tense author-translator relationship in the specific case under investigation and how both actors handle this tension in order to create a new work resulting from the (dis)agreement of the two parties
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