Abstract
Experiments were conducted in the autumn and winter of 1992/93 to examine habitat use by juvenile (age 0+) Atlantic cod, Gadus morhua L., before, during and following exposure to a passive or actively foraging predator (age 3+ cod). Experiments presented groups of juvenile cod (n=5 fish/group) with one of two combinations of three substrates; (1) gravel, sand, and a patch of artificial kelp (“kelp”), or (2) cobble, sand, and kelp. Cobble is known to provide juvenile cod with a refuge from predation. Kelp was used to test the hypothesis that juvenile cod associate with fleshy macroalgae in nature because of the safety it provides from predators. There was little difference in habitat use by juvenile cod before, during or following exposure to a passive predator. Under these conditions, juvenile cod appeared to prefer finer grained mineral substrates and avoided the kelp. The extent of the juvenile response to a passive predator was to avoid the predator's location in the experimental tank. In contrast, juvenile cod showed a significant shift in habitat use when exposed to an actively foraging predator, hiding in cobble or, when cobble was not available, in kelp. Use of both these habitats resulted in a significant reduction in predation risk to the juvenile cod. Our results suggest that: (1) an association with kelp provides safety from predation to juvenile cod, and (2) juvenile cod are capable for assessing the risk a predator represents and adjust their response accordingly.
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References
Bishop TD, Brown JA (1992) Threat-sensitive foraging by larval threespine sticklebacks (Gasterosteus aculeatus). Behavl Ecol Sociobiol 31: 133–139
Bishop YMM, Fienberg SE, Holland PW (1975) Discrete multivariate analysis: theory and practice. MIT Press, Cambridge
Coates D (1980) The discrimination of and reaction towards predatory and non-predatory species of fish by humbug damselfish, Dascyllus aruanus (Pisces, Pomacentridae). Z Tierpsychol 52: 347–354
Dill LM (1987) Animal decision-making and its ecological consequences: the future of aquatic ecology and behaviour. Can J Zool 65: 803–811
Edwards J (1983) Diet shifts in moose due to predator avoidance. Oecologia 60: 185–189
Gjosæter J (1987) Habitat selection and inter year class interaction of young cod (Gadus morhua) in aquaria. Flødevigen Rapportser 1, Arendal, Norway, pp 27–36
Gotceitas V (1990) Foraging and predator avoidance: a test of a patch choice model with juvenile bluegill sunfish. Oecologia 83: 346–351
Gotceitas V, Brown JA (1993) Substrate selection by juvenile Atlantic cod (Gadus morhua): effects of predation risk. Oecologia 93: 31–37
Gotceitas V, Colgan P (1989) Predator foraging success and habitat complexity: quantitative test of the threshold hypothesis. Oecologia 80: 158–166
Helfman GS (1989) Threat-sensitive predator avoidance in damselfish-trumpetfish interactions. Behavl Ecol Sociobiol 24: 47–58
Hirsch SM, Bolles RC (1980) On the ability of prey to recognize predators. Z Tierpsychol 54: 71–84
Karplus I, Goren M, Algom D (1982) A preliminary experimental analysis of predator face recognition by Chromis caeruleus (Pisces, Pomacentridae). Z Tierpsychol 58: 53–65
Keats DW, Steele DH, South GR (1987) The role of fleshy macroalgae in the ecology of juvenile cod (Gadus morhua L.) in inshore waters off eastern Newfoundaland. Can J Zool 65: 49–53
Licht T (1989) Discriminating between hungry and satiated predators: the response of guppies (Poecilia reticulata) from high and low predation sites. Ethology 82: 238–243
Lima SL, Dill LM (1990) Behavioral decisions made under the risk of predation: a review and prospectus. Can J Zool 68: 619–640
Magnhagen C, Forsgren E (1991) Behavioural responses to different types of predators by sand goby Pomatoschistus minutus: an experimental study. Mar Ecol Prog Ser 70: 11–16
Magurran AE, Girling SL (1986) Predator model recognition and response habituation in shoaling minnows. Anim Behav 34: 510–518
Mathis A, Smith RJF (1993) Fathead minnows, Pimephales promelas, learn to recognize northern pike, Esox lucius, as predator on the basis of chemical stimuli from minnows in the pike's diet. Anim Behav 46: 645–656
Milinski M (1993) Predation risk and feeding behaviour. In: Pitcher TJ (ed) Behaviour of teleost fishes. 2nd edn. Chapman and Hall, London, New York, pp 285–305
Orth RJ, Heck KL, Montfrans J van (1984) Faunal communities in seagrass beds: a review of the influence of plant structure and prey characteristics on predator-prey relationships. Estuaries 7: 339–350
Peckarsky BL, Cowan CA, Penton MA, Anderson C (1993) Sublethal consequences of stream-dwelling predatory stoneflies on mayfly growth and fecundity. Ecology 74: 1836–1846
Power ME (1984) Depth distribution of armored catfish: predator-induced resource avoidance? Ecology 65: 523–528
SAS Institute (1988) SAS/STAT user's guide. Release 6.03 edn. SAS Institute Inc., Cary, North Carolina
Scott WB, Scott MG (1988) Atlantic fishes of Canada. Can Bull Fish aquat Sciences 219: p 731
Smith JNM, Arcese P, McLean IG (1984) Age, experience, and enemy recognition by wild song sparrows. Behavl Ecol Sociobiol 14: 101–106
Werner EE, Hall DJ (1988) Ontogenetic habitat shifts in bluegill: the foraging rate-predation risk trade-off. Ecology 69: 1352–1366
Wurtsbaugh W, Li H (1985) Diel migrations of a zooplanktivorous fish (Menidia beryllina) in relation to the distribution of its prey in a large eutrophic lake. Limnol Oceanogr 30: 565–576
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Communicated by J.P. Grassle, New Brunswick
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Gotceitas, V., Fraser, S. & Brown, J.A. Habitat use by juvenile Atlantic cod (Gadus morhua) in the presence of an actively foraging and non-foraging predator. Marine Biology 123, 421–430 (1995). https://doi.org/10.1007/BF00349220
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DOI: https://doi.org/10.1007/BF00349220