Bayesian hierarchical surplus production model of the common whelk Buccinum undatum in Icelandic waters

Woods, Pamela J.; Jónasson, Jónas P.

doi:10.1016/j.fishres.2017.05.011

Cited by 8 publications

(12 citation statements)

References 29 publications

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“…The common whelk in Breiðafjörður Bay show high morphological diversity with clear differences both in shape and color throughout the bay. Whelk populations were clearly spatially differentiated, which corroborates the results of previous studies on the species in the bay (Gunnarsson & Einarsson, ; Magnúsdóttir, ; Woods & Jonasson, ) and indicates limited demographic connectivity between populations. Phenotypic variation (thickness, shell shape, and color diversity) displayed a distinct pattern from east to west.…”

Section: Discussionsupporting

confidence: 89%

“…Clines in species’ phenotypic traits are an important part of ecological and evolutionary studies (Levin, ) and can be extremely useful in quantifying the degree of connectivity among populations and for delineating population boundaries (Jones, Srinivasan, & Almany, ; Kough, Cronin, Skubel, Belak, & Stoner, ; Leis, van Herwerden, & Patterson, ; Woods & Jonasson, ). Geographical patterns in morphology can result from direct environmental control of physiological processes and body shape (Vermeij, ), differential adaptation to variable surroundings (Pinkert, Brandl, & Zeuss, ; Reinecke et al., ), or, alternatively, from random changes in genetically distinct populations (Kimura & Maruyama, ).…”

Section: Introductionmentioning

confidence: 99%

“…However, there is a noticeable paucity of knowledge on geographical patterns, population connectivity, and within‐species diversity in marine species (Conover, Clarke, Munch, & Wagner, ), particularly in deep sea (>200 m depth) habitats (Mengerink et al., ; Taylor & Roterman, ) but also in shallower, coastal seas. These coastal zones are home to many commercially harvested gastropods, for which spatial management and conservation strategies are hampered by a scarcity of data on population processes (Jones et al., ; Kough et al., ; Leis et al., ; Machkour‐M'Rabet, Cruz‐Medina, García‐De León, De Jesús‐Navarrete, & Hénaut, ; Woods & Jonasson, ). Moreover, marine molluscs with direct development (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Clines in species' phenotypic traits are an important part of ecological and evolutionary studies (Levin, 1992) and can be extremely useful in quantifying the degree of connectivity among populations and for delineating population boundaries (Jones, Srinivasan, & Almany, 2007;Kough, Cronin, Skubel, Belak, & Stoner, 2017;Leis, van Herwerden, & Patterson, 2011;Woods & Jonasson, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine‐scaled spatial patterns

Magnúsdóttir

Pálsson

Westfall

et al. 2018

Ecology and Evolution

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Geographical patterns in morphology can be the result of divergence among populations due to neutral or selective changes and/or phenotypic plasticity in response to different environments. Marine gastropods are ideal subjects on which to explore these patterns, by virtue of the remarkable intraspecific variation in life‐history traits and morphology often observed across relatively small spatial scales. The ubiquitous N‐Atlantic common whelk (Buccinum undatum) is well known for spatial variation in life‐history traits and morphology. Previous studies on genetic population structure have revealed that it exhibits significant differentiation across geographic distances. Within Breiðafjörður Bay, a large and shallow bay in W‐Iceland, genetic differentiation was demonstrated between whelks from sites separated by just 20 km. Here, we extended our previous studies on the common whelk in Breiðafjörður Bay by quantifying phenotypic variation in shell morphology and color throughout the Bay. We sought to test whether trait differentiation is dependent on geographic distance and/or environmental variability. Whelk in Breiðafjörður Bay displayed fine‐scale patterns of spatial variation in shape, thickness, and color diversity. Differentiation increased with increasing distance between populations, indicating that population connectivity is limited. Both shape and color varied along a gradient from the inner part of the bay in the east to the outer part in the west. Whelk shells in the innermost part of Breiðafjörður Bay were thick with an elongate shell, round aperture, and low color diversity, whereas in the outer part of the bay the shells were thinner, rounder, with a more elongate aperture and richer color diversity. Significant site‐specific difference in shell traits of the common whelk in correlation with environmental variables indicates the presence of local ecotypes and limited demographic connectivity.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine‐scaled spatial patterns

Magnúsdóttir

Pálsson

Westfall

et al. 2018

Ecology and Evolution

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“…The simulation is based on a mathematical model derived from (Woods and Jonasson, 2017). The growth of fish populations is modelled using a system of equations that depend upon two key parameters: the carrying capacity (K, measured in tons), which is the maximum population size that the environment can sustain; and the maximum production rate (P max , measured in tons per year), which is the maximum rate of production of new stock (through reproduction).…”

Section: Game Concepts and Designmentioning

confidence: 99%

A comparison of two methods of using a serious game for teaching marine ecology in a university setting

Ameerbakhsh

Maharaj

Hussain

et al. 2019

International Journal of Human-Computer Studies

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A B S T R A C TThere is increasing interest in the use of serious games in STEM education. Interactive simulations and serious games can be used by students to explore systems where it would be impractical or unethical to perform real world studies or experiments. Simulations also have the capacity to reveal the internal workings of systems where these details are hidden in the real world. However, there is still much to be investigated about the best methods for using these games in the classroom so as to derive the maximum educational benefit. We report on an experiment to compare two different methods of using a serious game for teaching a complex concept in marine ecology, in a university setting: expert demonstration versus exploration-based learning. We created an online game based upon a mathematical simulation of fishery management, modelling how fish populations grow and shrink in the presence of stock removal through fishing. The player takes on the role of a fishery manager, who must set annual catch quotas, making these as high as possible to maximise profit, without exceeding sustainable limits and causing the stock to collapse. There are two versions of the game. The "whitebox" or "teaching" game gives the player full information about all model parameters and actual levels of stock in the ocean, something which is impossible to measure in reality. The "black-box" or "testing" game displays only the limited information that is available to fishery managers in the real world, and is used to test the player's understanding of how to use that information to solve the problem of estimating the optimal catch quota.Our study addresses the question of whether students are likely to learn better by freely exploring the teaching game themselves, or by viewing a demonstration of the game being played expertly by the lecturer. We conducted an experiment with two groups of students, one using free, self-directed exploration and the other viewing an expert demonstration. Both groups were then assessed using the black box testing game, and completed a questionnaire. Our results show a statistically significant benefit for expert demonstration over free exploration. Qualitative analysis of the responses to the questionnaire demonstrates that students saw benefits to both teaching approaches, and many would have preferred a combination of expert demonstration with exploration of the game. The research was carried out among a mix of undergraduate and taught postgraduate science students. Future research challenges include extending the current study to larger cohorts and exploring the potential effectiveness of serious games and interactive simulation-based teaching methods in a range of STEM subjects in both university and school settings.

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Evaluation of natural mortality of an unfished gastropod (Buccinum undatum) population using statolith age‐frequency data in the southern Mid‐Atlantic Bight

Borsetti

Wiedenmann

Munroe

2022

Aquaculture Fish & Fisheries

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Natural mortality estimates of harvested stocks are key parameters used in stock assessments to aid in understanding the dynamics of populations, but these estimates are difficult to obtain and have a high degree of uncertainty. Data from unfished populations, which is often rare, provide a unique and valuable opportunity to estimate natural mortality. This study provides estimates of natural mortality using multiple methods from an unfished whelk (Buccinum undatum) population using statolith ages which prove to be an accurate method to assess age of gastropods. Using statolith age-frequency data, natural mortality for this unexploited Mid-Atlantic Bight whelk population was estimated to be 0.45-0.60 year −1 . Due to the unexploited state of this population, the mortality estimate in this study can be assumed to be a true reflection of natural mortality and thus compared with mortality estimates for populations under varying degrees of exploitation to understand how exploitation affects population dynamics.

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Bayesian hierarchical surplus production model of the common whelk Buccinum undatum in Icelandic waters

Cited by 8 publications

References 29 publications

Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine‐scaled spatial patterns

Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine‐scaled spatial patterns

A comparison of two methods of using a serious game for teaching marine ecology in a university setting

Evaluation of natural mortality of an unfished gastropod (Buccinum undatum) population using statolith age‐frequency data in the southern Mid‐Atlantic Bight

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