Structuring of a Predator Population Through Temperature-Mediated Effects on Prey Availability

Adams, S. Marshall; McLean, R.B.; Huffman, Michaela M

doi:10.1139/f82-155

Cited by 131 publications

(86 citation statements)

References 20 publications

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“…in Atlantic cod (Dutil and Lambert, 2000), roach (Griffiths and Kirkwood, 1995) and smallmouth bass (Adams et al, 1982), can significantly decrease swimming endurance (e.g. Atlantic cod; Martinez et al, 2003).…”

Section: Feeding Exercise and Inactivitymentioning

confidence: 99%

Cardiac plasticity in fishes: environmental influences and intraspecific differences

Gamperl

Farrell

2004

Journal of Experimental Biology

234

176

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With over 20·000 species of teleost fish, considerable interspecific diversity in cardiac anatomy and physiology is expected. This is the outcome of evolutionary adaptation to different habits, modes of life and activity levels. For example, athletic species have a more powerful heart than sedentary species, and fish such as hagfish, carp and eel normally show a much higher degree of myocardial hypoxia tolerance than species such as salmonids (Farrell, 1991;Farrell and Jones, 1992). Plasticity in cardiac form and function has also been demonstrated during ontogeny, and the cardiovascular flexibility exhibited during embryonic and larval development, is nicely reviewed by Pelster (2003). What is less well appreciated, however, is the high degree of intraspecific cardiac plasticity displayed by post-larval fishes. Accordingly, this review explores what is known about intraspecific cardiac plasticity among juvenile and adult fishes. This intraspecific plasticity, like that exhibited during development, may well reflect individual variability on which natural selection could act.In this review, we focus primarily on temperature effects, which are relatively well studied, and on the effects of other environmental and biological factors that modify cardiac anatomy and physiology, including food deprivation, sexual maturation, exercise training and rearing under aquaculture conditions. Further, we summarize recent work on cardiac preconditioning and myocardial hypoxia tolerance in fishes, and discuss the potential implications of this work.Preconditioning is a short-term form of cardiac plasticity that has the potential to protect the heart from insults that might normally lead to cardiac damage, dysfunction or death. Preconditioning has been the focus of several thousand mammalian studies (e.g. see review by Yellon and Downey, 2003), and so the handful of recent studies in fish, which already point to important intraspecific differences, may find application outside the piscine world. Similarly, researchers who wish to stimulate cardiac growth to replace damaged myocardial tissue in mammals, may be heartened to discover that fish cardiac tissue, unlike the mammalian heart, does not lose its ability for hyperplastic growth with age. In fact, we suspect that the high degree of intraspecific plasticity that we Fish cardiac physiology and anatomy show a multiplicity of intraspecific modifications when exposed to prolonged changes in environmentally relevant parameters such as temperature, hypoxia and food availability, and when meeting the increased demands associated with training/increased activity and sexual maturation. Further, there is evidence that rearing fish under intensive aquaculture conditions significantly alters some, but not all, aspects of cardiac anatomy and physiology. This review focuses on the responses of cardiac physiology and anatomy to these challenges, highlighting where applicable, the importance of hyperplastic (i.e. the production of new cells) vs hypertrophic (the enlargement of existing cells...

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Section: Feeding Exercise and Inactivitymentioning

confidence: 99%

Cardiac plasticity in fishes: environmental influences and intraspecific differences

Gamperl

Farrell

2004

Journal of Experimental Biology

234

176

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“…A taxa de conversão alimentar seria então igual a 0,11 (grama de peixe / grama de alimento) ou 11%. Este valor também é inferior ao apresentado para outros piscívoros com táticas de caça semelhante, como, Perca flavescens e Stizostedium vitreum (Swenson & Smith, 1973;Brett, 1979;Adams et al, 1982), cuja média é 20%. Aumentandose a taxa de consumo de alimento, reduziria a taxa de conversão alimentar a valores inferiores a 10% o que seria muito baixo para um peixe piscívoro.…”

Section: Família Das Presasunclassified

A dieta e o consumo diário de alimento de Cichla monoculus na Amazônia Central

Rabelo¹,

Araújo-Lima²

2002

Acta Amaz.

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RESUMO -Avaliar a dieta, o ritmo alimentar e a taxa de consumo diária de alimento dos peixes pode permitir estimar a relação entre a alimentação e o crescimento, a pressão de predação sobre espécies de presas, a limitação alimentar durante estações do ano e a competição intra e interespecífica. Estas informações são desconhecidas para C.monoculus na Amazônia Central e aqui são apresentados dados sobre a ecologia trófica desta espécie durante quatro estações hidrológicas. A área de estudo incluía três lagos de várzea na Amazônia Central, durante os períodos de agosto de 1997 a julho de 1998. Os estudos da dieta e do ritmo alimentar foram feitos através das análises dos conteúdos estomacais. A taxa de evacuação gástrica foi estimada experimentalmente. O consumo diário de alimento foi calculado a partir dos modelos de Elliot & Persson e de Eggers. A intensidade de alimentação da espécie foi baixa durante a seca. A dieta do C. monoculus foi basicamente piscívora e composta de nove famílias de peixes e uma de camarão, apresentando variações no decorrer das estações hidrológicas e com o tamanho do peixe. A taxa de evacuação gástrica foi 16,9% h -1 . O consumo diário de alimento, que não foi diferente nas quatro estações hidrológicas, teve média igual a 2,23% do peso corporal. Este valor é baixo comparado a outros estudos estimados para peixes tropicais. Indicando que esta espécie come relativamente pouco.Palavras-chave: Cichla, Amazônia, peixes, alimentação, consumo diário Feeding and Daily Ration of Cichla monoculus in Central Amazon.ABSTRACT -Information on food, feeding rhythm and daily ration of fish are useful to food limitation. This type of information was lacking to Cichla monoculus in its natural habitats in the Central Amazon floodplain and here it is presented data on the feeding ecology of this species during one hydrological cycle. The study included three floodplain lakes sampled analysis and the gastric evacuation rate was measured experimentally. The daily ration was the dry season. The diet consisted basically of fish, comprising 9 families of fish but one family of shrimp occurred in 20% of the samples. The gastric evacuation rate was 16.9%h -1 . The daily ration was not different between seasons and averaged 2.23% bw. This is a relatively low value compared to other piscivores.

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“…Daily consumption: Adams model.-We estimated daily consumption using a simple meal turnover-time adapted from Adams et al (1982) and modified by Naughton (1998); (Roger Tabor, USFWS Olympia Washington, personal communication) where:…”

Section: Consumption Of Fall Chinook Salmon By Smallmouth Bassmentioning

confidence: 99%

Post-Release Attributes and Survival of Hatchery and Natural Fall Chinook Salmon in the Snake River : Annual Report 1999.

Tiffan¹,

Rondorf²

2001

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Structuring of a Predator Population Through Temperature-Mediated Effects on Prey Availability

Cited by 131 publications

References 20 publications

Cardiac plasticity in fishes: environmental influences and intraspecific differences

Cardiac plasticity in fishes: environmental influences and intraspecific differences

A dieta e o consumo diário de alimento de Cichla monoculus na Amazônia Central

Post-Release Attributes and Survival of Hatchery and Natural Fall Chinook Salmon in the Snake River : Annual Report 1999.

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