Does dominance status correlate with growth in wild stream-dwelling Atlantic salmon (Salmo salar)?

Harwood, Andrew

doi:10.1093/beheco/arg080

Cited by 61 publications

(57 citation statements)

References 46 publications

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“…Studies on correlations between metabolic rate and growth in brown trout (Álvarez and Nicieza, 2005) and between dominance and growth in Atlantic salmon (Harwood et al, 2003) in the wild also suggest that shortage of food tends to dissolve any relationships between traits, inferring no apparent advantage to high SMR or dominance. In conclusion, we found that total body mass was highly stable over a period of 15weeks, whereas rSMR, rAMR and rAAS did not retain repeatability.…”

Section: Discussionmentioning

confidence: 99%

Repeatability of standard metabolic rate, active metabolic rate and aerobic scope in young brown trout during a period of moderate food availability

Norin

Malte

2011

Journal of Experimental Biology

156

165

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SUMMARYStandard metabolic rate (SMR) and active metabolic rate (AMR) are two fundamental physiological parameters providing the floor and ceiling in aerobic energy metabolism. The total amount of energy available within these two parameters confines constitutes the absolute aerobic scope (AAS). Previous studies on fish have found SMR to closely correlate with dominance and position in the social hierarchy, and to be highly repeatable over time when fish were provided an ad libitum diet. In this study we tested the temporal repeatability of individual SMR, AMR and AAS, as well as repeatability of body mass, in young brown trout (Salmo trutta L.) fed a moderately restricted diet (0.5-0.7% fish mass day -1 ). Metabolism was estimated from measurements of oxygen consumption rate (M O2 ) and repeatability was evaluated four times across a 15-week period. Individual body mass was highly repeatable across the entire 15 week experimental period whereas residual body-mass-corrected SMR, AMR and AAS showed a gradual loss of repeatability over time. Individual residual SMR, AMR and AAS were significantly repeatable in the short term (5 weeks), gradually declined across the medium term (10 weeks) and completely disappeared in the long term (15 weeks). We suggest that this gradual decline in repeatability was due to the slightly restricted feeding regime. This is discussed in the context of phenotypic plasticity, natural selection and ecology.

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Section: Discussionmentioning

confidence: 99%

Repeatability of standard metabolic rate, active metabolic rate and aerobic scope in young brown trout during a period of moderate food availability

Norin

Malte

2011

Journal of Experimental Biology

156

165

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“…As argued by Heg et al (2004b), this effect may come about by top-down regulation (e.g. dominants despotically exclude subordinates from preferred feeding sites, Whiteman and Cote 2004; but see also Harwood et al 2003;Sloman et al 2000) or by bottomup regulation (e.g. subordinates voluntarily reduce their food intake and growth rate accordingly to avoid eviction, Wong et al 2007Wong et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

Status-dependent and strategic growth adjustments in female cooperative cichlids

Heg

2010

Behav Ecol Sociobiol

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Male group-living cichlids show status and strategic adjustments in growth, but females appear not to show these growth adjustments. Here, an experimental study in the Lake Tanganyika cichlid Neolamprologus pulcher elaborates on these findings. Females did not show status-dependent growth: (1) Growth in females decelerated with body size but did not depend on social status (breeder or helper), and (2) female helpers did not increase their growth rate after becoming a breeder. Females showed limited evidence for strategic growth: (3) Female helpers did not significantly adjust their growth rate depending on the treatments (comparing female helpers living in groups with a small or a large breeder female); but within the small breeder female treatment, helper growth was significantly related to their body size difference (breeder size-helper size), suggesting a strong non-linear effect of size differences on female helper growth. I conclude that these female cichlids show no status-dependent growth and only strategic growth adjustments when the size difference between the helper female and her breeder female is particularly small.

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“…Nile tilapia is a territorial cichlid species that organize themselves into hierarchy of dominance (Corrga et al, 2003;Barreto and Volpato, 2006a;b). Dominance hierarchies result in unequal distribution of resources, with dominant individuals able to monopolize the resources (Harwood et al, 2003). For instance, dominant Nile tilapia makes the food patch unavailable for the subordinate ones (Delicio et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Correlations Between Pre- and Post-Fasting Growth in Nile Tilapia

Barreto

Gontijo

Delício

2008

Journal of Applied Animal Research

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Does dominance status correlate with growth in wild stream-dwelling Atlantic salmon (Salmo salar)?

Cited by 61 publications

References 46 publications

Repeatability of standard metabolic rate, active metabolic rate and aerobic scope in young brown trout during a period of moderate food availability

Repeatability of standard metabolic rate, active metabolic rate and aerobic scope in young brown trout during a period of moderate food availability

Status-dependent and strategic growth adjustments in female cooperative cichlids

Correlations Between Pre- and Post-Fasting Growth in Nile Tilapia

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