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.

    Spontaneous spawning, fecundity and spawning periodicity in the donkey's ear abalone Haliotis asinina Linnaeus 1758

    • Global styles
    • APA
    • Elsevier - Harvard
    • Vancouver
    • MLA
    • Help
    Thumbnail
    View/Open
    Request a copy
    Date
    2000
    Author
    Fermin, Armando C.
    Gapasin, Rolando S.J.
    Teruel, Myrna B.
    Page views
    2,131
    Metadata
    Show full item record
    
    Share 
     
    Abstract
    Spontaneous group spawning was monitored in wild-caught (WC) and hatchery-bred (HB) abalone broodstock (Haliotis asinina) held in duplicate tanks at 1:3 (male: female) ratio from June 1997 to January 1999. Abalone breeders (mean SL, wild = 69-79 mm, HB = 68-71 mm) were kept in perforated plastic baskets and fed red alga, Gracilariopsis bailinae, to excess given at weekly intervals. Abalone spawned spontaneously year-round. Water temperature during the study ranged from 26-29 degree C. A total of 139 and 128 spawning episodes were recorded for WC and HB group respectively. Spawning in WC group (mean: 7 ± 0.8) were more frequent in September (1998) and from February to April. Spawning frequency in the HB group (mean: 6.4 ± 1) was generally high during September (1998) until April. Likewise, egg production was highest during these months. Pooled mean survival from trochophore to veligers stage ranged from 7 to 30% (n=36). Potential fecundity was determined in sacrificed group of HB females (n=21) varied from 6,741-11,902 oocytes g -1 BW. Mean oocyte diameter ranged from 136 to 150 mu m. Bigger females had higher potential fecundity (range: 6.2 to 11 x 105 oocytes individual -1 than smaller females (range: 2.8 to 3.3 x 105 oocytes individual -1). The time interval between successive spawning among animals that spawned more than twice during a 5-month period ranged from 13 to 34 days for the small-size group and from 18 to 37 days for large-size group. In separately stocked HB females (without male), instantaneous fecundity was shown to range between 1,500 and 12,300 eggs g -1 BW (n=16). In contrast to potential fecundity, smaller and younger individuals gave higher 68-71 instantaneous fecundity (range: >3,000 >12,000 oocytes g -1 BW) than the bigger and older individuals (1,500-6,500 oocytes g -1 BW).
    URI
    http://hdl.handle.net/10862/437
    Type
    Conference paper
    Subject
    Mollusks; Abalone culture; Spawning; Fecundity; Periodicity; Philippines; Abalones; Haliotis asinina
    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.