Detection of Allee effects in marine fishes: analytical biases generated by data availability and model selection

Perälä, Tommi; Kuparinen, Anna

doi:10.1098/rspb.2017.1284

Cited by 34 publications

(40 citation statements)

References 25 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These modelling approaches have been heavily criticized (e.g. Perälä & Kuparinen, ; Shelton & Healey, ) amidst empirical evidence that a reduction of F is not always a sufficient condition for recovery (Hutchings & Kuparinen, ) and that the population dynamics of some stocks at low size are consistent with the presence of Allee effects (Keith & Hutchings, ; Neuenhoff et al, ; Perälä & Kuparinen, ).…”

Section: Consequences Of Fie For Population Recovery: An Empirical Pementioning

confidence: 99%

Implications of fisheries‐induced evolution for population recovery: Refocusing the science and refining its communication

Hutchings

Kuparinen

2019

Fish and Fisheries

Self Cite

View full text Add to dashboard Cite

The argument that sufficiently high fishing mortality (selective or not) can effect genetic change in fished populations has gained considerable traction since the late 1970s. The intervening decades have provided compelling experimental and model‐based evidence that fisheries‐induced evolution (FIE) can cause genetic changes in life history, behaviour and body shape, given sufficiently high trait heritability, selection intensity and time. Fisheries‐induced evolution research has also identified or inferred negative implications to population recovery and sustainable yield, prompting calls for evolutionarily enlightened management to reduce the probability of FIE and mitigate its risks. Sufficient time has now elapsed to evaluate whether predicted negative consequences to recovery have been empirically realized. We find that many FIE‐implicated populations have recovered rapidly to management‐based targets following cessation of overfishing. We conclude that FIE is generally of minor importance to recovery when compared with overfishing, magnitude of depletion and natural mortality. By posing a series of questions and responses, we illustrate how science advice pertaining to human‐induced evolution in fishes can be strengthened. We suggest that FIE research be refocused and its communication refined to: (a) better integrate FIE within existing stock‐assessment modelling frameworks; (b) pose questions of greater relevance at the science:policy interface; and (c) concentrate research on questions pertaining to the subset of depleted populations for which the implications of FIE are likely to be magnified because of their synergistic interactions with other correlates of recovery and yield.

show abstract

Section: Consequences Of Fie For Population Recovery: An Empirical Pementioning

confidence: 99%

Implications of fisheries‐induced evolution for population recovery: Refocusing the science and refining its communication

Hutchings

Kuparinen

2019

Fish and Fisheries

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recruitment (as stocking) in our model was a management policy rather than an ecological process. In addition, this enhancement could include depensatory processes (Ward et al 2013a;Perälä and Kuparinen 2017) and provide a more realistic assessment of the potential for overfishing and collapse with important management and conservation implications for wild-stock fisheries. A second, and very useful research direction, would be to subset the processes within the spatial SES to test hypotheses that result in the emergent properties of the system.…”

Section: R a F Tmentioning

confidence: 99%

Landscape-scale social and ecological outcomes of dynamic angler and fish behaviours: processes, data, and patterns

Carruthers

Dabrowska

Haider

et al. 2019

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

The first relatively complete landscape-scale social–ecological system (SES) model of a recreational fishery was developed and ground-truthed with independent angling effort data. Based on the British Columbia multistock recreational fishery for rainbow trout (Oncorynchus mykiss), the model includes hundreds of individual lake fisheries, hundreds of thousands of anglers, originating from tens of communities, connected by complex road and trail networks, all distributed over a landscape of approximately half a million square kilometres. The approach is unique in that it incorporates realistic and empirically derived behavioural interactions within and among the three key components of the SES: angler communities, fish populations, and management policies. Current management policies were characterized and alternate policies assessed by simulation. We examined spatial patterns in ecological and social properties of the SES and used simulations to investigate the impacts of alternate management policies on these patterns. Simulation outcomes strongly depended on the spatial redistribution of anglers across the landscape, existing road networks, heterogeneity in angler behaviours, and the spatial pattern of fish population productivity.

show abstract

“…Yet, Allee effects have been suggested for various marine fish such as Atlantic herring, Clupea harengus (Saha et al. , Perälä and Kuparinen ), shallow‐water cape hake, Merluccius capensis (Vergnon et al. ), and Pacific salmon, Oncorhynchus spp.…”

Section: Introductionmentioning

confidence: 99%

Implications of Allee effects for fisheries management in a changing climate: evidence from Atlantic cod

Winter

Richter

Eikeset

2019

Ecological Applications

View full text Add to dashboard Cite

There are concerns that increasing anthropogenic stressors can cause catastrophic transitions in ecosystems. Such shifts have large social, economic, and ecological consequences and therefore have important management implications. A potential mechanism behind these regime shifts is the Allee effect, which describes the decline in realized per capita growth rate at small population density. With an age‐structured population model for Atlantic cod, Gadus morhua, we illustrate how interactions between human‐induced stressors, such as fishing and climate change, can worsen the impact of an Allee effect on populations by promoting hysteresis. Therefore, the risk of population collapse and recovery failure is exacerbated and the success of preventing and reverting collapse depends on the climate regime. We find that, in presence of the Allee effect, a fishing moratorium is only sufficient for recovery when sea surface temperature rise remains within 2°C and fishing is restricted within 10 yrs. If sea surface temperature rises beyond 2°C, even immediate banning of fishing is not sufficient to guarantee recovery. If fishing is not fully banned and a residual fishing pressure remains, the probability of recovery is further decreased, also in the absence of an Allee effect. The results underscore the decisive role of Allee effects for the management of depleted populations in an increasingly human‐dominated world. Once the population collapses and its growth rate is suppressed, rebuilding measures will be squandered and collapse will very likely be irreversible. We therefore emphasize the need for proactive management involving precautionary, adaptive measures and reference points. Our studies shows that climate change has the potential to strengthen Allee effects, which could increasingly challenge fisheries management.

show abstract

Detection of Allee effects in marine fishes: analytical biases generated by data availability and model selection

Cited by 34 publications

References 25 publications

Implications of fisheries‐induced evolution for population recovery: Refocusing the science and refining its communication

Implications of fisheries‐induced evolution for population recovery: Refocusing the science and refining its communication

Landscape-scale social and ecological outcomes of dynamic angler and fish behaviours: processes, data, and patterns

Implications of Allee effects for fisheries management in a changing climate: evidence from Atlantic cod

Contact Info

Product

Resources

About