SEAFDEC/AQDINSTITUTIONAL REPOSITORY
    • Login
    View Item 
    •   SEAFDEC/AQD Institutional Repository Home
    • 03 SEAFDEC/AQD External Publications
    • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
    • Conference Proceedings
    • View Item
    •   SEAFDEC/AQD Institutional Repository Home
    • 03 SEAFDEC/AQD External Publications
    • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
    • Conference Proceedings
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Histopathology of chlorella-feeding in larval milkfish, Chanos chanos

    • Global styles
    • APA
    • Elsevier - Harvard
    • Vancouver
    • MLA
    • Help
    Thumbnail
    View/Open
    Request a copy
    Date
    1986
    Author
    Segner, Helmut
    Burkhardt, Patricia
    Avila, Enrique M.
    Storch, Volker
    Juario, Jesus V.
    Page views
    1,476
    Metadata
    Show full item record
    
    Share 
     
    Abstract
    Unicellular algae, particularly Chlorella, are widely used as starter feeds for marine finfish larvae. However, milk fish larvae when reared on Chlorella sp., suffered morality up to 100% within the first days of feeding (Fig. 1). Morality induced by Chlorella occurred earlier than that induced by starvation. The present Communication describes histopathological changes in liver and intestines of mlikfish larvae fed with Chlorella sp., copared with starvedor Artemia-fed fish. Feeding the larvea with Artemia for 7 days evofed (Ø 12-16 micro m) hepatocytes, with a well-developed and orderly arranged rough endoplasmic reticulum (rER). Greater amounts of glycogen were deposited. Whereas those fed with Chlorella (Fig. 2) resulted in cellular shrinkage (Ø 5-7micro m), complete absence of stored products, degeneration of rER. swelling of mitochondria and augmentation of lysosome-like structures (compare also Juario & Storch 1984). Starvation-related alterations of hepatocyte ultrastructure were essentially similar.

    The intestinal tract of milkfish larvae is subdivided into pharynx, esophagus, stomach, intestines I(making up to 70% of gut length), II(up to 20%), and III (up to 10%). Nutritional related changes were only observed in intestines I and II. In Artemia-fed specimens there was intensive lipid absorption in I (Fig. 3) and well-developed supranuclear vacuoles in II (Fig. 4). Under starvation, The first part of the intestine was characterized by partial cellular hydrops, autolyic vacuoles (Fig. 5) and a dissolution of basal labyrinth. The supranuclear vacuoles of II were reduced to smaller, electron dense inclusions (Fig. 6). Chlorells appeared partially digested in the gut. It evoked pathological intrcellular vacuolation of the epithelial cells and bizarre forms of the nuclei in I (Fig. 7). In II, changes were similar to starved larvae (fig. 8).

    The present report is another example of high moralities occurring among fish larvae reared on live feeds (compare Eckmann 1985).
    URI
    http://hdl.handle.net/10862/281
    Type
    Conference paper
    Subject
    Finfishes; Milkfish culture; Seed production; Larvae; Food organisms; Histopathology; Mortality; Milkfish; Chanos chanos; Chlorella
    Collections
    • Conference Proceedings [281]


    © SEAFDEC/AQD  2021
    Contact Us | Send Feedback
     

     

    Browse

    All of SAIRCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsKeywordsThis CollectionBy Issue DateAuthorsTitlesSubjectsKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics
    SEAFDEC/AQD Library

    © SEAFDEC/AQD  2021
    Contact Us | Send Feedback
     

     

    Export citations

    Export the current results of the search query as a citation list. Select one of the available citation styles, or add a new one using the "Citations format" option present in the "My account" section.

    The list of citations that can be exported is limited to items.

    Export citations

    Export the current item as a citation. Select one of the available citation styles, or add a new one using the "Citations format" option present in the "My account" section.

    Export Citations

    EXTERNAL LINKS DISCLAIMER

    This link is being provided as a convenience and for informational purposes only. SEAFDEC/AQD bears no responsibility for the accuracy, legality or content of the external site or for that of subsequent links. Contact the external site for answers to questions regarding its content.

    If you come across any external links that don't work, we would be grateful if you could report them to the repository administrators.

    Click DOWNLOAD to open/view the file. Request a copy in case the link we provided don't work.

    Download

    DOCUMENT REQUEST NOT AVAILABLE

    This publication is still available (in PRINT) and for sale at AQD bookstore. The library is currently restricted to send PDF of publications that are still for sale.

    You may contact bookstore@seafdec.org.ph or visit AQD bookstore for orders.

    FILE UNDER EMBARGO

    This file associated with this publication is currently under embargo. This will be available for download after the embargo date.