Intraspecific variation in competitive ability and food intake in salmonids: consequences for energy budgets and growth rates

Metcalfe, N. B.

doi:10.1111/j.1095-8649.1986.tb05190.x

Cited by 239 publications

(166 citation statements)

References 18 publications

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“…The capacity to process food and grow fast, or maintain a dominant social status endowed by a high SMR (Millidine et al 2009), may be a disadvantage during food shortage (Metcalfe 1986;Burton et al 2011), when these individuals are likely to lose energy reserves faster than low-SMR individuals. Especially for larval fish with high weight-specific metabolic rates and low energy reserves, the interaction between metabolism and environmental conditions could be an important factor determining survival.…”

Section: Otolith Growthmentioning

confidence: 99%

Otoliths as individual indicators: a reappraisal of the link between fish physiology and otolith characteristics

Grønkjær¹

2016

Mar. Freshwater Res.

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Abstract. Otoliths are remarkable recorders that store visual and chemical information that can be interpreted with regard to individual fish phenotype trajectory, life history events and environment. However, the information stored in the otoliths must be interpreted with the knowledge that the otolith is an integral part of fish sensory systems. This means that the environmental signals recorded in the otoliths will be regulated by the homeostatic apparatus of the individual fish -its physiology and ultimately its genetic make-up. Although this may complicate interpretation of environmental signals, it also opens up avenues for new research into the physiology and life history of individual fish. This review focuses on research areas where the coupling between otolith characteristics and fish physiology may yield new insights. Most of the research ideas are by no means new, but rather represent largely forgotten or less-explored research areas. Examples of questions that are fundamental, unanswered and with the potential to yield significant new insights are those related to the coupling of otolith and fish growth through metabolism, and the formation of opaque and translucent growth zones in relation to the physiology of the individual. An integration of visual and chemical data with bioenergetic modelling may yield some of the answers.

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Section: Otolith Growthmentioning

confidence: 99%

Otoliths as individual indicators: a reappraisal of the link between fish physiology and otolith characteristics

Grønkjær¹

2016

Mar. Freshwater Res.

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“…Among these, body size has received considerable attention (Policanksy 1982, Rice et al 1987, Anderson 1988, Pepin 1989, Litvak & Leggett 1992. One hypothesis is that a larger size at a given life history stage confers a survival advantage through reduced predation rates ) and enhanced competitive abilities, hence greater access to food resources (Coates 1980, Metcalfe 1986). In addition, the levels of energy reserves (nutritional condition) in larvae potentially provide a buffer against fluctuations in the pelagic envi.ronment such as food availabi.lity and temperature.…”

Section: Introductionmentioning

confidence: 99%

Temporal patterns in size and condition at settlement in two tropical reef fishes (Pomacentridae:Pomacentrus amboinensis and P. nagasakiensis)

Ba¹

1996

Mar. Ecol. Prog. Ser.

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Temporal variability in the size, age, and biochemical composition of newly settled fish of 2 tropical reef species, Pomacentrus amboinensis and P nagasakiensis, were examined over 3 recruitment seasons in the northern Great Barrier Reef, Australia. Juveniles of both species were more variable in composition (CV: 32.2 to 35.8%) than size (CV: 5.1 to 5.3%) and a g e (CV: 7.2 to 8.4 1 " ) at settlement. Overall, P. amboinensis settled over a range of ages from 15 to 23 d , while the larval duration of P, nagasakiensis ranged from 16 to 24 d . The biochemical composition of both species varied among lunar recruitment pulses. Strong interannual differences in the composition (princ~pally carbohydrate and protein) of P. amboinensisjuveniles were detected This variability in nutritional condition of newly settled fish has important implications for future patterns of post-settlement growth and development. P, amboinensis and P. nagasakjensis settling during a single lunar recruitment e p~s o d e [pulse) differed in length, body depth, and weight. On average P. nagasak~ensls were 2 mm lonycr and 0.03 g heavier at settlement than P. amboinensis. P. nagasaklensis attained this larger size at settlement by means of a higher average growth rate during the larval penod. Juveniles of both pomacentrid specics settling at the same time were very similar in nutritional condition Flsh settling in the first pulse of the recruitment season weighed less and contained less hpid than recrults settling in the follo~ving month. This suggests that the effect of processes in the pelagic environment controlling the accun~ulation of energy reserves in juvenile stages of reef fish are not necessarily species spec~flc.

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“…An evolutionary game theory model by Enquist and Leimar (1987) predicts that the costs of fighting will increase when resource value increases and, the probability of victory for an animal will increase when resource value is increased only to that animal. Aggressiveness is often shown by dominant individuals in interference competition (Metcalfe, 1986). For instance, in trout, the dominants can aggressively defend a food source and thereby largely reduce feeding and consequently growth of the subordinates (Metcalfe, 1986).…”

Section: Introductionmentioning

confidence: 99%

Behavioral alterations in GH transgenic common carp may explain enhanced competitive feeding ability

Duan

Zhang

et al. 2011

Aquaculture

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Intraspecific variation in competitive ability and food intake in salmonids: consequences for energy budgets and growth rates

Cited by 239 publications

References 18 publications

Otoliths as individual indicators: a reappraisal of the link between fish physiology and otolith characteristics

Otoliths as individual indicators: a reappraisal of the link between fish physiology and otolith characteristics

Temporal patterns in size and condition at settlement in two tropical reef fishes (Pomacentridae:Pomacentrus amboinensis and P. nagasakiensis)

Behavioral alterations in GH transgenic common carp may explain enhanced competitive feeding ability

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