1,380 research outputs found

    The use of earthworms as a feed for rainbow trout (Salmo gairdneri)

    Get PDF
    The nutritional and chemical characteristics of five earthworm species: Lumbricus terrestris; Allolobophora longa; Eisenia foetida; Dendrobaena veneta and Dendrodrilus subrubicundus were assessed on the basis of crude protein and amino acid composition, lipid and fatty acid composition, and ash and mineral composition. Analyses indicated that all the earthworm species evaluated possessed a high quality protein and lipid fraction suitable for use in fish feeds which was somewhat similar in composition to that of fish meal. During experimental feeding trials (50-84 days in duration) each earthworm species was nutritionally evaluated, on the basis of fish growth performance, feed utilization efficiency and gross carcass composition, as a complete feed (frozen slices of whole worm) for rainbow trout· (Salmo gairdneri) A dried 'earthw9rm meal' derived from each of the species E.foetida, D.veneta and D.subrubicundus was similarly evaluated as a potential replacement for fish meal in trout diets. Fish fed frozen slices of earthworm, with the exception of fish fed E.foetida, achieved growth rates and feed utilization efficiency comparable to. fish fed a control, fish meal based ration. Fish fed solely on frozen slices of E.foetida achieved little or no growth over the experimental period. The possible reasons for the reduced palatability of frozen E.foetida to the fish are discussed, pre-treatment processes applied and a significant improvement in the palatability of frozen E.foetida was achieved by blanching. High dietary inclusion levels of earthworm meal (replacing ~ 50% of the fish meal protein) resulted in depressed feed intake and growth of the fish. At reduced levels of inclusion, dried E.foetida meal (constituting 5-30% of a production salmonid diet) and dried D.subrubicundus meal (constituting 7-36% o~ a semi-synthetic trout diet) adequately replaced the dietary fish meal component without loss in fish growth and feed utilization efficiency. The possible uptake of potentially toxic trace elemeots (Fe, Zn, Mn, Pb, Cu, Cr, Ni, Co and Cd) into the fish carcass through the ingestion of contaminated earthworm diets was also investigated and the levels of certain elements, in particular Pb, were observed to increase in the carcass of fish fed high levels of earthworm in the diet. However, in no instance did the results indicate any harmful or toxic effect of including earthworms in the diets of rainbow trout

    Audit Committee roles and responsibilities in two English public sector settings

    Get PDF
    Purpose This paper aims to conduct a comparative study by examining the Audit Committee (AC) set-up, roles, responsibilities and developments in two distinct English public sector settings, namely, foundation trusts (FTs) and local authorities (LAs). Design/methodology/approach The paper is exploratory and explanatory in nature and uses a qualitative case study approach framed in institutional theory. It is based on semi-structured interviews with AC chairs, external and internal auditors and finance directors triangulated with meeting observations and documentation review. Findings The study finds that public sector ACs have a large and diverse role which extends beyond challenging/monitoring responsibilities. Influenced by the New Public Management ideology, the AC has developed more rapidly in FTs due to imposed regulation contrasting with the slower progress in LAs due to its still voluntary adoption. Nevertheless, in both environments, there is a developing understanding and growing competence within the AC in terms of their assurance role where the focus has shifted from an emphasis on function and on transacting business through following a manual, to a more strategic-looking approach. Research limitations/implications Due to the complexity of public sector settings, and by using an approach framed within institutional theory, the study contributes by challenging a simple notion of isomorphism as an explanation of AC roles, responsibilities and development in two distinct public sector environments. Furthermore, the study recognizes that there is a need to ensure ACs are appropriate to their institutional setting and organizational context. Originality/value Most AC studies have focused on private sector contexts. This paper explores the phenomenon in a different organizational context, namely, as a public sector comparative case study. </jats:sec

    Consultation with children and young people with experience of domestic abuse on Scottish Government National Domestic Abuse Delivery Group draft proposals : main report

    Get PDF
    Findings and Conclusions: Major Themes • There was support in principle from young people for all of the proposals • Young people gave careful consideration to the proposals and to how they might operate in practice; they expressed some caution about supporting them unreservedly until it was demonstrated they would work in practice • In relation to all of the proposals young people had concerns about confidentiality and privacy, about to the ability to control the flow of personal information, and there were concerns about trust • Participants expressed the importance of the proposals contributing to young people being and feeling safe
    • …
    corecore