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    Diel activity patterns in Metapenaeus and Penaeus juveniles

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    Date
    1995
    Author
    Primavera, J. Honculada
    Lebata, J. ORCID
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    1,361
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    Abstract
    Small (5–10.9 mm carapace length), medium (11–15.9 mm), and large (16–20.9 mm) juveniles of Metapenaeus anchistus, Metapenaeus sp., Penaeus monodon and P. merguiensis were stocked individually in glass tanks provided with sand substrate, sea water, artificial bamboo shelter, aeration and food. The seven activity types (recorded for each shrimp hourly for 24 h) were classified as below (burrowing) or above substrate (swimming, walking, stationary, in shelter, feeding and cleaning). Shrimp juveniles exhibited a strong diel periodicity — emergence and activity at night and burrowing in the day. The chi-square test showed that type of activity (above/below substrate) was associated with period (light/dark). Diurnal burrowing was greater among Metapenaeus than Penaeus; inversely, above substrate activities were more frequent for Penaeus species compared to Metapenaeus. Feeding was the major above substrate and nocturnal activity for M. anchistus, Metapenaeus sp. and P. monodon. Only P. Monodon used the shelter consistently. Frequency of the 7 activity types was dependent on juvenile size for Penaeus, e.g., the preference for shelters shifted to burrowing with increase in size in P. monodon. Results are discussed in relation to the importance of mangrove habitats in providing shelter to penaeids, in particular the mangrove-associated P. monodon and P. merguiensis.
    URI
    http://hdl.handle.net/10862/1489
    Suggested Citation
    Primavera, J. Honculada., & Lebata, J. (1995). Diel activity patterns in Metapenaeus and Penaeus juveniles. Hydrobiologia, 295(1-3), 295-302.
    DOI
    10.1007/BF00029136
    Type
    Article
    ISSN
    0018-8158
    Subject
    Activity patterns; Burrowing organisms; Diurnal variations; Juveniles; Metapenaeus; Penaeus
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    • Journal Articles [1108]


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