The presence of scavengers increases the vulnerability of juvenile abalone to predatory fish

June 2007
Fisheries Science;Jun2007, Vol. 73 Issue 3, p732
Academic Journal
The article explores the effect of scavengers on abalone, Haliotis discus discus, especially in the situation where predatory fishes exist. Tank experiments were carried out using wrasse, one of the major predatory fish for abalone juvenile just after release, and a saprophagous gastropod Ergalatax contractus, which is a common scavenger in abalone releasing grounds. The effect of adding E. contractus resulted in an increase of 2.4 abalone that left from the shelters than the case of the E- treatment. It is concluded that the presence of E. contractus forced the abalone to leave the shelters, and consequently increased the vulnerability of the abalone to predators such as wrasse.


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