Retention of learned predator recognition in an endangered sucker Chasmistes liorus liorus Article

Archer, SK, Crowl, TA. (2014). Retention of learned predator recognition in an endangered sucker Chasmistes liorus liorus . 20(3), 195-202. 10.3354/ab00558

cited authors

  • Archer, SK; Crowl, TA

fiu authors

abstract

  • Captive propagation and restocking of native fishes is a common conservation strategy. However, hatchery-reared fishes are predator-naïve, and thus many stocked fishes are lost to predation, reducing the effectiveness of restocking programs. Many fishes use odor to identify known predators and, through the detection of chemical alarm cues, learn to recognize novel predators. A large body of research has focused on the efficacy of using predator odors in conjunction with chemical alarm cues to train hatchery-reared fishes to recognize predators prior to stocking. While it appears possible to train most fishes to recognize a novel predator through exposure to olfactory cues, few studies have shown that this training translates into increased survival for trained fishes. Recently, it has been proposed that hatchery fishes do not retain the learned associations long enough for hatchery training to result in increased survival, though few studies have quantified how long hatchery-reared fishes do retain learned associations. We conducted a series of laboratory experiments that demonstrate hatchery-raised June sucker Chasmistes liorus liorus, an endangered sucker endemic to Utah Lake, Utah, USA, can learn to recognize a novel predator (largemouth bass Micropterus salmoides). We also show that this learned association is retained for at least 2 d, but is lost by 10 d after initial exposure. Our results suggest that in the absence of reinforcement, June sucker do not retain learned predator recognition long enough to expect hatchery training to translate into increased survival. © The authors 2014.

publication date

  • January 1, 2014

Digital Object Identifier (DOI)

start page

  • 195

end page

  • 202

volume

  • 20

issue

  • 3