Thermal sensitivity of growth, food intake and activity of juvenile brown trout

Ojanguren, Alfredo F.; Reyes-Gavilán, Felipe G.; Braña, F.

doi:10.1016/s0306-4565(00)00038-3

Cited by 87 publications

(74 citation statements)

References 25 publications

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“…Elliot, 1991;Elliot and Elliot, 1995;Elliot and Hurley, 1997;Ojanguren et al, 2001). While this gives excellent fit to the single parameter models (Elliot and Elliot, 1995), it may not closely reflect performance in relation to thermal regime as observed in the more complex natural environment, and thus makes transferability outside of the laboratory questionable even in the absence of other complicating variables (Bacon et al, 2005).…”

Section: Juvenile Salmon Performancementioning

confidence: 99%

“…Over the non-lethal range, temperature continues to be an important influence on many aspects of the salmonid life cycle. Temperature has been shown to be associated with the location and time of spawning (Webb and McLay, 1996), and to influence rates of embryo development and timing of emergence (Crisp, 1988;Elliot and Hurley, 1998), food intake (Elliot, 1991;Ojanguren et al, 2001;Flodmark et al, 2004), growth (Hokanson et al, 1977;Thomas et al, 1986;Elliot andHurley, 1997, 2003;Lobon-Cervia and Rincon, 1998;Ojanguren et al, 2001;Jones et al, 2002;Jensen, 2003;Meeuwig et al, 2004;Bacon et al, 2005), and population demographics (Gurney et al, 2008). Temperature has also been shown to influence smolting, migration and resistance to disease (Crisp, 1996;Richter and Kolmes, 2005;Gurney et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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The influence of riparian woodland on stream temperatures: implications for the performance of juvenile salmonids

Malcolm¹,

Soulsby

Hannah

et al. 2008

Hydrological Processes

102

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Abstract:Stream temperature was monitored at five mainstem locations and one tributary location on the Girnock Burn, a 31-km 2 tributary catchment of the Aberdeenshire Dee in north-east Scotland. Stream temperature was recorded at 15-min resolution between April 2003 and March 2006 to investigate the influence of semi-natural riparian woodland on the spatial and temporal variability of stream temperature and the influence that this had on the performance of juvenile Atlantic salmon (Salmo salar). Two upstream sites were located in open moorland locations, while three downstream sites were located in areas of mixed deciduous/coniferous woodland areas at progressive distances of 0Ð75, 1Ð5 and 2Ð0 km from the upstream edge of continuous riparian tree cover. The effects of riparian woodland on stream temperature varied through the year, increasing during the spring to a maximum in summer, before decreasing once again in autumn. Maximum, mean and diel temperature amplitude were lower and minimum temperatures higher at woodland sites when compared to those located in open moorland. Although significant differences in fish performance were detected between sites, the influence of temperature variability was unclear due to confounding factors, some of which could not be measured during the study. It is recommended that future studies should combine advances in field-based temperature monitoring with those in hydroclimatology to develop realistic process-based models that can be used for stream temperature prediction. Further advances are needed in understanding the relationship between naturally variable thermal regime and fish performance in order that ecological predictions can be usefully made from field and modelled temperature data.  Crown

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Section: Juvenile Salmon Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of riparian woodland on stream temperatures: implications for the performance of juvenile salmonids

Malcolm¹,

Soulsby

Hannah

et al. 2008

Hydrological Processes

102

View full text Add to dashboard Cite

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“…For example, among salmonids, bull trout (Salvelinus confluentus) have narrower and colder thermal performance curves than do brown trout (Salmo trutta) for metrics such as growth and survival, which correspond with the more alpine habitat of bull trout (e.g. Ojanguren et al, 2001;Selong et al, 2001). To explain the mechanistic basis for thermal performance and tolerance in ectotherms, a leading hypothesis has been termed oxygen-and capacity-limited thermal tolerance (OCLTT) (Pörtner and Knust, 2007).…”

Section: Introductionmentioning

confidence: 99%

Aerobic scope increases throughout an ecologically relevant temperature range in coho salmon

Raby

Casselman

Cooke

et al. 2016

Journal of Experimental Biology

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Aerobic scope (AS) has been proposed as a functional measurement that can be used to make predictions about the thermal niche of aquatic ectotherms and hence potential fitness outcomes under future warming scenarios. Some salmonid species and populations, for example, have been reported to exhibit different thermal profiles for their AS curves such that AS peaks around the modal river temperature encountered during the upriver spawning migration, suggesting species-and population-level adaptations to river temperature regimes. Interestingly, some other salmonid species and populations have been reported to exhibit AS curves that maintain an upwards trajectory throughout the ecologically relevant temperature range rather than peaking at a modal temperature. To shed further light on this apparent dichotomy, we used adult coho salmon (Oncorhynchus kisutch) to test the prediction that peak AS coincides with populationspecific, historically experienced river temperatures. We assessed AS at 10 and 15°C, which represent a typical river migration temperature and the upper limit of the historically experienced temperature range, respectively. We also examined published data on AS in juvenile coho salmon in relation to new temperature data measured from their freshwater rearing environments. In both cases, AS was either maintained or increased modestly throughout the range of ecologically relevant temperatures. In light of existing evidence and the new data presented here, we suggest that when attempting to understand thermal optima for Pacific salmon and other species across life stages, AS is a useful metric of oxygen transport capacity but other thermally sensitive physiological indices of performance and fitness should be considered in concert.

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“…Routine activity was assessed during a period of natural nocturnal activity between 19:00 -20:00 hrs (Marcellini, 1974;Ojanguren et al, 2001;Frenkel, 2006). We defined routine activity as the total amount of exploratory movement of an individual during a one-hour period (Ojanguren et al, 2001).…”

Section: Routine Activitymentioning

confidence: 99%

“…We defined routine activity as the total amount of exploratory movement of an individual during a one-hour period (Ojanguren et al, 2001). Individuals were observed within their permanent terraria (26 x 17 x 13 cm), which were orientated sideways to allow full visibility of movement.…”

Section: Routine Activitymentioning

confidence: 99%

Sex-specific variation in morphology and performance in the Asian house gecko

Cameron¹

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Ever since Darwin's theory of sexual selection was first published, understanding the evolutionary mechanisms that lead to sex-specific traits and quantifying patterns therein has been a large focus of evolutionary ecologists. Sexual variation in phenotypes in form and function is ubiquitous in nature, and its extent varies widely, within closely related groups and even species. Understanding patterns and the circumstances under which sexually divergent phenotypes evolve requires an understanding of both the proximate and evolutionary mechanisms involved. While studies have primarily focused on sex-specific morphological traits such as size and secondary trait dimorphism, less attention has been given to the functional differences between the sexes. From an evolutionary perspective, sexspecific traits result from many factors that act differentially on each sex, modifying phenotypic and behavioural components that influence the capacity of fulfilling reproductive roles. Therefore, sexual selection alone does not define the magnitude of phenotypic divergence between the sexes, but it is rather the interplay between sexual and natural selection and their interactions with the environment. Intraspecific studies investigating associations between form and function of sexspecific traits provide a useful tool to understand the fundamental mechanisms that lead to the evolution of complex traits in males and females. The overall aim of this thesis was to gain a better understanding of the evolutionary mechanisms that drive patterns in sex-specific phenotypes, using a territorial gecko species (Hemidactylus frenatus) distributed over a large latitudinal cline.The first aim of this thesis was to examine the potential trade-offs between performance functions associated with reproductive success and to test whether compensatory mechanisms may obscure the detection of such costs (Chapter 2). Fighting capacity and escape performance of male H. frenatus are likely to pose conflicting demands on the optimum phenotype for each task. Highly territorial and aggressive males may require greater investment in head size/strength but such an enhancement may reduce overall escape performance. To test this idea, the second aim (also in Chapter 2) was to determine the role of morphological and functional traits in determining the outcome of male-male combat (reproductive success) and prey-capture ability (survivorship).Among male geckos, I found that larger head size resulted in greater biting capacity, but at a cost of reduced spring performance. Females, however, showed no evidence of this trade-off. The sex specificity of this trade-off suggests that the sexes differ in their optimal strategies for dealing with the conflicting requirements of bite force and sprint speed. Unlike males, female H. frenatus had a positive association between hind-limb length and head size, suggesting that they have utilised a compensatory mechanism to alleviate the possible locomotor costs of larger head sizes. It appears that there is greater sel...

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Thermal sensitivity of growth, food intake and activity of juvenile brown trout

Cited by 87 publications

References 25 publications

The influence of riparian woodland on stream temperatures: implications for the performance of juvenile salmonids

The influence of riparian woodland on stream temperatures: implications for the performance of juvenile salmonids

Aerobic scope increases throughout an ecologically relevant temperature range in coho salmon

Sex-specific variation in morphology and performance in the Asian house gecko

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