Stock, Recruitment and Exploitation

Hindar, Kjetil; Hutchings, Jeffrey A.; Diserud, Ola Håvard; Fiske, Peder

doi:10.1002/9781444327755.ch12

Cited by 37 publications

(64 citation statements)

References 69 publications

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“…The C&R development in Norwegian fisheries, although with a time lag, is parallel. An important structural fix in Norway was caused by research showing that many rivers needed more spawners than previously believed to reach full production (Hindar, Hutchings, Diserud, & Fiske, 2011). Because of this, several rivers got stricter regulations including daily/ seasonal personal quotas, and both voluntary and regulation imposed C&R has grown.…”

Section: Norm Emergence and Candr Anglingmentioning

confidence: 99%

The Influence of Norms and Consequences on Voluntary Catch and Release Angling Behavior

Stensland

Aas

Mehmetoglu

2013

Human Dimensions of Wildlife

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As catch and release angling (C&R) behavior increases, more knowledge is needed to understand the influence of norms and perceived consequences. Based on a survey of salmon anglers (n = 656) in Lakselv River, Norway, we showed that norms and awareness of consequences influence anglers' behavioral intention of voluntarily releasing fish. Awareness of consequences had stronger impact on C&R behaviour than the perceived social norm. The results from the structural modeling supported our initial conceptual model, and suggest that voluntary C&R is a process where the individual angler considers the biophysical (ecology, setting, species, status of stocks) and social setting in addition to other factors. Future research should look further into the cognitive part of obligation to do C&R, the more affective or emotional components of sanctions of doing or not doing C&R and the influence of knowledge, in different angler subpopulations and between types of fisheries.

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Section: Norm Emergence and Candr Anglingmentioning

confidence: 99%

The Influence of Norms and Consequences on Voluntary Catch and Release Angling Behavior

Stensland

Aas

Mehmetoglu

2013

Human Dimensions of Wildlife

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“…[15]). While the exact shape of the equation is rather arbitrary, our key objective was simply to have an empirically defensible means of limiting fecundity at high population abundance.…”

Section: (B) Demographic Ratesmentioning

confidence: 99%

Genetic architecture of age at maturity can generate divergent and disruptive harvest-induced evolution

Kuparinen

Hutchings

2017

Phil. Trans. R. Soc. B

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One contribution of 18 to a theme issue 'Human influences on evolution, and the ecological and societal consequences'. Life-history traits are generally assumed to be inherited quantitatively. Fishing that targets large, old individuals is expected to decrease age at maturity. In Atlantic salmon (Salmo salar), it has recently been discovered that sea age at maturity is under strong control by a single locus with sexually dimorphic expression of heterozygotes, which makes it less intuitive to predict how life histories respond to selective fishing. We explore evolutionary responses to fishing in Atlantic salmon, using eco-evolutionary simulations with two alternative scenarios for the genetic architecture of age at maturity: (i) control by multiple loci with additive effects and (ii) control by one locus with sexually dimorphic expression. We show that multi-locus control leads to unidirectional evolution towards earlier maturation, whereas single-locus control causes largely divergent and disruptive evolution of age at maturity without a clear phenotypic trend but a wide range of alternative evolutionary trajectories and greater trait variability within trajectories. Our results indicate that the range of evolutionary responses to selective fishing can be wider than previously thought and that a lack of phenotypic trend need not imply that evolution has not occurred. These findings underscore the role of genetic architecture of life-history traits in understanding how human-induced selection can shape target populations.This article is part of the themed issue 'Human influences on evolution, and the ecological and societal consequences'.

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“…The problem that has received the most attention is that of maintaining wild salmon stock, which spawns in the salmon streams of Norway. Currently, Norway has more than 400 watercourses with Atlantic salmon populations and holds about 25% of the world's healthy populations (Hindar et al, 2011). Consequently, Norwegian authorities have taken a particular responsibility to protect the species and its populations.…”

Section: Introductionmentioning

confidence: 99%

Environmental problems and regulation in the aquaculture industry. Insights from Norway

Olaussen

2018

Marine Policy

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Abstract:Since the beginnings of the aquaculture industry in Norway, the salmon farming industry has grown from a pioneering niche to a massive industrial adventure. Since 1992, Norwegian salmon production has increased to ten times its 1992 level. By 2015, the Norwegian production constituted 53% of the world's production of Atlantic salmon. Therefore, it could be said that salmon farming is the most important industry in rural Norway today, with a yearly landing value of about 6.1 billion EUR. As the production has grown, along with the income, numerous environmental issues have arisen. The present paper gives an overview of these environmental problems and discusses potential solutions, as well as the need for a better and more holistic regulation of the industry. The experience from Norwegian salmon farming with respect to environmental issues and regulation may give important insights to both other salmon producing countries as well as producers of other fish species.

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Stock, Recruitment and Exploitation

Cited by 37 publications

References 69 publications

The Influence of Norms and Consequences on Voluntary Catch and Release Angling Behavior

The Influence of Norms and Consequences on Voluntary Catch and Release Angling Behavior

Genetic architecture of age at maturity can generate divergent and disruptive harvest-induced evolution

Environmental problems and regulation in the aquaculture industry. Insights from Norway

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