Feeding rates of the nemertean Prosorhochmus americanus (Hoplonemertea) on two species of gammaridean amphipods

摘要: . The intertidal hoplonemertean Prosorhochmus americanus is a common inhabitant of the fouling community rock jetties southeast coast United States. We undertook laboratory investigation feeding rate this nemertean, which suctorial predator amphipod crustaceans that co-occur in abundance community. While submerged water (simulating high tide), worms fed on tube-building amphipods Jassa falcata and Corophium cf. insidiosum at rates 0.19 amphipods nemertean−1 d−1 (n=10) 0.26 amphipods nemertean−1 d−1 (n=14), respectively. These predation were not significantly different (two-tailed t-test, p>0.05), are similar to those estimated studies other nemerteans. Many nemerteans typically more active night, indeed, adults P. consumed individuals J. during dark periods than light (χ2 analysis, p<0.05). However, no difference consumption C. was observed versus light. attribute these contrasting results differences behavior exhibited by two species under conditions. Our investigations suggest prey feed ∼0.2 prey items nemertean−1 d−1, but natural conditions may be obtained because limited time, longer foraging distances, emigration from regions nemertean activity.