Effects of environmental change and early-life stochasticity on Pacific bluefin tuna population growth

Ijima, Hirotaka; Jusup, Marko; Takada, Tappei; Akita, Tetsuya; Matsuda, Hiroyuki; Klanjšček, Tin

doi:10.1016/j.marenvres.2019.05.003

Cited by 9 publications

(8 citation statements)

References 71 publications

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“…Species with a highly specialised or generally nutritionally poor diet may be at a higher risk by additional energy limitations imposed by plastics ingestion than, for example carnivorous loggerheads. Again, answers are methodologically within our reach (Mazaris et al ., 2006; Schuyler et al ., 2016; Ijima et al ., 2019; Stubbs et al, 2020), but remain speculative until high‐fidelity field data become available.…”

Section: Discussionmentioning

confidence: 99%

“…To describe an individual's ontogeny we thus used dynamic energy budgets (Nisbet et al ., 2000; Sousa et al ., 2008, 2010; Jusup et al ., 2017), although other approaches based on physiological energetics would do (Nisbet et al ., 2012). Similarly, population dynamics is implementable in any number of ways, for example via the Euler–Lotka equation (De Roos, 2008; Beekman et al ., 2019), matrix population models (Klanjscek et al ., 2006; Ijima et al ., 2019), physiologically structured population models (De Roos and Persson, 2002; Diekmann et al ., 2003), or integral projection models (Smallegange et al ., 2017). Finally, we modelled the effects of debris ingestion in the form of competition between food and plastics for available digestive capacity.…”

Section: Methodsmentioning

confidence: 99%

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Quantifying impacts of plastic debris on marine wildlife identifies ecological breakpoints

et al. 2020

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Quantifying sublethal effects of plastics ingestion on marine wildlife is difficult, but key to understanding the ontogeny and population dynamics of affected species. We developed a method that overcomes the difficulties by modelling individual ontogeny under reduced energy intake and expenditure caused by debris ingestion. The predicted ontogeny is combined with a population dynamics model to identify ecological breakpoints: cessation of reproduction or negative population growth. Exemplifying this approach on loggerhead turtles, we find that between 3% and 25% of plastics in digestive contents causes a 2.5-20% reduction in perceived food abundance and total available energy, resulting in a 10-15% lower condition index and 10% to 88% lower total seasonal reproductive output compared to unaffected turtles. The reported plastics ingestion is insufficient to impede sexual maturation, but population declines are possible. The method is readily applicable to other species impacted by debris ingestion.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Quantifying impacts of plastic debris on marine wildlife identifies ecological breakpoints

et al. 2020

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“…Hypothesis 5 The institutional-managerial components have a direct and imperative impact on each of the four measurements in the marine environment with a 95% confidence showing the model is of a fine quality which is persistent with the studies completed by Davies et al (2016), Hinostroza et al (2019), and Ijima et al (2019.…”

Section: Hypothesismentioning

confidence: 97%

An evaluation of the marine environmental resilience to the north of Qeshm Island

Ghasemi

Javid

Farsad

et al. 2021

Environ Monit Assess

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is one of the nonexperimental techniques, to quantify the results in the best manner possible. On the basis of the fuzzy cognitive map (FCM), the regional economic index bearing the weights of 0.62, 0.62, and 0.5, along with an institutional-managerial and biological index, respectively, denotes a two-way positive correlation, whereas this factor has a two-way, but adverse correlation, relationship with a weight of 0.65 in terms of the sociocultural index. Similarly, there is also a one-way and negative relationship, as to the economic index, with a weight of 0.69 which is in relevance with the physio-chemical index.

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“…The standard DEB model can be run directly in the GUI, but more complex features-including spatial heterogeneity-require additional programming. Population dynamics can be modelled in a number of ways if IBM approaches are impractical, including the Euler-Lotka equation [1014,1015], matrix population models [1016,1017], continuous-time physiologically structured [1018,1019], and integral-projection models [1020]. Of those, matrix population models have a particularly low barrier to entry and can also separate the population into patches [1021], include predation, and other ecological interactions.…”

Section: Pollutionmentioning

confidence: 99%

Social physics

Jusup,

Holme,

Kanazawa

et al. 2021

Preprint

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Recent decades have seen a rise in the use of physics-inspired or physicslike methods in attempts to resolve diverse societal problems. Such a rise is driven both by physicists venturing outside of their traditional domain of interest, but also by scientists from other domains who wish to mimic the enormous success of physics throughout the 19 th and 20 th century. Here, we dub the physics-inspired and physics-like work on societal problems "social physics", and pay our respect to intellectual mavericks who nurtured the field to its maturity. We do so by comprehensively (but not exhaustively) reviewing the current state of the art. Starting with a set of topics that pertain to the modern way of living and factors that enable humankind's prosperous existence, we discuss urban development and traffic, the functioning of financial markets, cooperation as a basis for civilised life, the structure of (social) networks, and the integration of intelligent machines in such networks. We then shift focus to a set of topics that explore potential threats to humanity. These include criminal behaviour, massive migrations, contagions, environmental problems, and finally climate change. The coverage of each topic is ended with ideas for future progress. Based on the number of ideas laid out, but also on the fact that the field is already too big for an exhaustive review despite our best efforts, we are forced to conclude that the future for social physics is bright. Physicists tackling societal problems are no longer a curiosity, but rather a force to be reckoned with, yet for reckoning to be truly productive, it is necessary to build dialog and mutual understanding with social scientists, environmental scientists, philosophers, and more.

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Effects of environmental change and early-life stochasticity on Pacific bluefin tuna population growth

Cited by 9 publications

References 71 publications

Quantifying impacts of plastic debris on marine wildlife identifies ecological breakpoints

Quantifying impacts of plastic debris on marine wildlife identifies ecological breakpoints

An evaluation of the marine environmental resilience to the north of Qeshm Island

Social physics

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