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Functional response of early stages of the cuttlefish Sepia officinalis preying on the mysid Mesopodopsis slabberi
Márquez, L.; Caballos, M.; Domingues, P. (2007). Functional response of early stages of the cuttlefish Sepia officinalis preying on the mysid Mesopodopsis slabberi. Mar. Biol. Res. 3(6): 462-467. dx.doi.org/10.1080/17451000701751479
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000, more
Peer reviewed article  

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Keywords
    Predation; Sepia officinalis Linnaeus, 1758 [WoRMS]; Marine

Authors  Top 
  • Márquez, L.
  • Caballos, M.
  • Domingues, P.

Abstract
    The functional response of Sepia officinalis early stages, preying on mysids of the species Mesopodopsis slabberi was investigated. The effects of five prey densities (12.5, 25, 37.5, 50 and 125 mysids l-1) and two hatchling ages (1-day-old and 7-day-old) on consumption rate and the frequency of non-feeding animals were tested. Older animals were approximately 50% heavier than newly hatched ones. Hatchlings were individually assayed under 0.25 W m-2 natural light, 37.8 psu in salinity and 19°C. The effect of prey density on consumption rate was highly significant and no effect of age was detected within the age range tested. Maximal values recorded for consumption rate were about 0.45 mysids h-1. The frequency of non-feeding individuals was strongly reduced at saturating prey densities. The functional response curve showed an interval of prey densities for which density-dependent prey mortality is probable.

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