The behavioural thermal preference of the common triplefin (Forsterygion lapillum) tracks aerobic scope optima at the upper thermal limit of its distribution

Javed Rafiq Khan, N. A. Herbert

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Ocean temperatures are rising and fish are redistributing themselves poleward and into deeper waters to retain a favourable thermal environment (Dulvy et al., 2008; Perry et al., 2005). To investigate whether biogeographical shifts might occur through behavioural redistribution into optimal environments, we examined whether a common triplefin species (Forsterygion lapillum) would behaviourally select (i.e. track) a temperature that matches its physiological optimum under laboratory conditions. F. lapillum were acclimated to 15, 18 or 21 degrees C for at least 4 weeks, after which various rates of oxygen consumption (MO2) were measured using automated respirometry and their behavioural thermal preferenda assessed using an electronic shuttle choice tank. Aerobic metabolic scope (resolved as the difference between maximal and maintenance MO2) did not differ across all thermal treatments (i.e. specimens acclimated to 15, 18 or 21 degrees C) revealing that F. lapillum is a eurythermal species with a range of optimal physiological performance that closely matches the environmental conditions they are exposed to. A comparably wide range of behavioural preference would perhaps be expected but all three acclimation groups showed a surprisingly narrow behavioural preference range of 20-21 degrees C. The results therefore suggest that, irrespective of acclimation, eurythermal species may have a tendency to select optimal temperatures at the upper limit of their thermal distribution range. The results are discussed in the context of the ecology and the expected response of F. lapillum to future thermal change. (C) 2011 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalJournal of Thermal Biology
Volume37
Issue number2
Pages (from-to)118-124
ISSN0306-4565
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • BIOLOGY
  • ZOOLOGY
  • TROUT ONCORHYNCHUS-MYKISS
  • CLIMATE-CHANGE
  • SWIMMING PERFORMANCE
  • ATLANTIC COD
  • METABOLIC SCOPE
  • GADUS-MORHUA
  • OXYGEN-CONSUMPTION
  • WATER TEMPERATURE
  • FINAL PREFERENDUM
  • DYNAMIC ACTION
  • Aerobic metabolic scope
  • Respirometry
  • Oxygen consumption
  • Behavioural thermoregulation
  • Forsterygion lapillum
  • Climate change
  • Physiology
  • Developmental Biology
  • Biochemistry
  • Agricultural and Biological Sciences (all)
  • aerobic metabolism
  • animal behavior
  • article
  • biogeography
  • climate
  • controlled study
  • fish
  • heat treatment
  • nonhuman
  • oxygen consumption
  • respirometry
  • temperature acclimatization
  • Behavioral biology - General and comparative behavior
  • Behavioral biology - Animal behavior
  • Ecology: environmental biology - General and methods
  • Ecology: environmental biology - Animal
  • Physiology - General
  • Animal distribution
  • Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates
  • species distribution
  • oxygen consumption rate
  • behavioral thermal preference
  • aerobic scope optima

Cite this