Title

Basis of Selective Predation by the Aquatic Larvae of the Salamander, Ambystoma Tigrinum

Publication Title

Freshwater Biology

Publication Date

2-1988

Document Type

Article

DOI

10.1111/j.1365-2427.1988.tb00330.x

Disciplines

Biology

Abstract

  1. The effect of several factors on feeding selectivity by three size classes of larvae of Ambystoma tigrinum (Green) was examined. Five types of invertebrate prey were used: Chaoborus, Daphnia, damselflies, Hyalella and water boatmen.
  2. Five variables were examined in relation to the electivity indices associated with each prey type: ease of prey consumption, ease of prey capture, relative prey size, prey activity, and microhabitat overlap. No single variable explained the observed electivity.
  3. For small larvae (snout-vent length, SVL,6.5cm), ease of prey consumption, prey activity, and relative prey size predicted electivity values. However, none of the measured variables was related to electivity values found for medium sized larvae (SVL >3.5 and <5.5cm).