Food size dependent feeding and egg production of Acartia pacifica from a tropical Strait

Teruaki Yoshida, Er Jin Eio, Tatsuki Toda, Bin Haji Ross Othman

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    A study was carried out to observe the effect of food size spectra and food concentration on the ingestion rate and egg production rate (EPR) of Acartia pacifica (Steuer, 1915), a small calanoid copepod (total length 1.0-1.3 mm), from the Strait of Malacca. Food particles were divided into four size fractions (10-20, 20-35, 35-50, and 50-140 μm) and quantified in terms of chlorophyll a concentration and carbon biomass with the C:N values used as an indication of food quality. Acartia pacifica showed significantly higher carbon ingestion rates for the 50-140 μm food size fraction, reflecting the species' affinity for larger food particles; however, mean EPR was significantly higher for the 35-50 μm food size fraction where the mean C:N value was 14.7. Similarly, gross egg production efficiency (Ep) was the highest for this food size fraction. In general, Ep was comparable to other Acartia species from tropical areas, but lower than those from temperate regions. This probably is due to a higher metabolic carbon demand and a lower quality of food in the tropical environment. Acartia pacifica effectively utilized food from the broad size spectrum used in our study with an affinity for larger particles with higher (though not highest) C:N content.

    Original languageEnglish
    Pages (from-to)251-266
    Number of pages16
    JournalBulletin of Marine Science
    Volume88
    Issue number2
    DOIs
    Publication statusPublished - Apr 2012

    Fingerprint

    Acartia
    egg production
    strait
    food
    food quality
    carbon
    tropical foods
    ingestion
    ingestion rate
    Copepoda
    chlorophyll
    biomass
    tropical environment
    chlorophyll a

    ASJC Scopus subject areas

    • Aquatic Science
    • Oceanography

    Cite this

    Food size dependent feeding and egg production of Acartia pacifica from a tropical Strait. / Yoshida, Teruaki; Eio, Er Jin; Toda, Tatsuki; Othman, Bin Haji Ross.

    In: Bulletin of Marine Science, Vol. 88, No. 2, 04.2012, p. 251-266.

    Research output: Contribution to journalArticle

    Yoshida, Teruaki ; Eio, Er Jin ; Toda, Tatsuki ; Othman, Bin Haji Ross. / Food size dependent feeding and egg production of Acartia pacifica from a tropical Strait. In: Bulletin of Marine Science. 2012 ; Vol. 88, No. 2. pp. 251-266.
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