Recruitment variability and stochastic population growth of the soft-shell clam, Mya arenaria

Ripley, Bonnie J.; Caswell, Hal

doi:10.1016/j.ecolmodel.2005.07.033

Cited by 31 publications

(32 citation statements)

References 55 publications

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“…This estimate is approximate; the parameter is difficult to model because of random events such as predation and hydrodynamics that influence the actual recruitment (Hunt 2004, Ripley and Caswell 2006, Dang et al 2010. We therefore combined deterministic formulation, which is based on biological observations related to temperature and gonadal development (Paesanti and, and a random function, aiming to include the natural randomness.…”

Section: Simulation Resultsmentioning

confidence: 99%

Addressing Sustainability of Clam Farming in the Venice Lagoon

Canu¹,

Campostrini²,

Riva³

et al. 2011

E&S

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ABSTRACT. The clam fishing and aquaculture system in the Venice Lagoon still appears insufficiently resilient to buffer external and internal perturbations, such as productivity fluctuations, unregulated fishing, and market related dynamics, despite the efforts of regional and local authorities to achieve the sustainable development. According to the System Approach Framework (SAF), based on previous studies and stakeholder interactions, we developed a model integrating ecological, social, and economic (ESE) aspects. We chose the aspects necessary to represent the essential dynamics of major ecological, social, and economic clam farming system components to project the consequences of implementing alternative management policies and to address the ecological and social carrying capacity. Results of the simulations suggest that a properly managed farming system can sustain an acceptable income and support the local community, while reducing negative environmental impacts, social conflicts, and consumer health risks and improving system resilience. The results highlight the importance of an interdisciplinary, participatory, and adaptive approach in planning the management of this important renewable resource.

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Section: Simulation Resultsmentioning

confidence: 99%

Addressing Sustainability of Clam Farming in the Venice Lagoon

Canu¹,

Campostrini²,

Riva³

et al. 2011

E&S

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“…As few S. kagoshimensis individuals were distributed before recruitment in 2010, the source can be attributed to planktonic larval supply from nearby tidal flat populations (Yoshino et al 2009). It is known that years of massive recruitment are often followed by several years of poor recruitment in several long-lived mollusks (Bachelet 1986;Nakaoka 1993;Noda and Nakao 1996), and such mass recruitment often plays a significant role in determining subsequent population density and persistence (Nakaoka 1993;Noda and Nakao 1996;Ripley and Caswell 2006). The settlers in September 2010 formed a strong year class, which persisted through the succeeding years.…”

Section: Discussionmentioning

confidence: 99%

Community assembly by limited recruitment in a hypoxia-stressed soft bottom: A case study of macrobenthos in Ariake Bay

Yoshino

Katano

Ito

et al. 2014

Plankton Benthos Res

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Small species often dominate benthic communities in hypoxia-stressed sites, but the organizing process has rarely been investigated. Community assembly was investigated in northwestern Ariake Bay, which is exposed to hypoxia during summer. Sampling was performed 11 times between May 2010 and May 2012. The timing and duration of hypoxia differed between 2010 and 2011, which caused a different pattern of seasonal change in the community structure between the 2 years. The community was mainly composed of small species such as Theora fragilis, Veremolpa micra, and Sternaspis scutata at all times. The exception was the large arcid bivalve Scapharca kagoshimensis. This bivalve newly settled after hypoxia in 2010 and became a dominant species of the subsequent community, whereas its density decreased greatly after hypoxia in 2011. Interestingly, new settlement of arc shells did not occur in 2011 when hypoxia was relatively moderate compared with that in 2010. These results suggest that small species dominance at a hypoxia-stressed site cannot be attributable only to repeated hypoxic devastation and quick recovery of short-lived small species but also to the variability in natural recruitment of long-lived large species. Large species cannot easily recover if low recruitment years continue, even if hypoxic conditions are moderate. Therefore, the need for more attention to recruitment variability of large species is emphasized in striving to understand community assembly and efficiently restore coastal soft bottom communities that have deteriorated due to hypoxia.

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“…We chose these parameter values so that (1) the individual patch growth rates would be similar to the net reproductive rates for the one-stage case above, i.e. R 1 = 2.5 and R 2 = 0.9; and (2), so that they would roughly comport with the results of Ripley and Caswell (2006) who estimated demographic parameters for M. arenaria from field studies. Migration rates are difficult to obtain for M. arenaria, as they are for all benthic invertebrates with pelagic larvae, but the values mi = m2 = 0.1 are arguably realistic.…”

Section: ) M2mentioning

confidence: 99%

“…In an attempt to return to my original questions about population connectivity and metapopulation dynamics, I began using mathematical models of M. arenaria metapopulations. The matrix population model presented in Chapter 6 began by my adding spatial structure to previous work on M. arenaria by Ripley and Caswell (2006). As I developed the model, it metamorphosed into something more generally applicable to any metapopulation subjected to stochastic disturbance.…”

Section: Thesis Goalsmentioning

confidence: 99%

Metapopulation dynamics of the softshell clam, Mya arenaria

Strasser¹

2008

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Recruitment variability and stochastic population growth of the soft-shell clam, Mya arenaria

Cited by 31 publications

References 55 publications

Addressing Sustainability of Clam Farming in the Venice Lagoon

Addressing Sustainability of Clam Farming in the Venice Lagoon

Community assembly by limited recruitment in a hypoxia-stressed soft bottom: A case study of macrobenthos in Ariake Bay

Metapopulation dynamics of the softshell clam, Mya arenaria

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