Biogeographic, ontogenetic, and environmental variability in larval behaviour of American lobster Homarus americanus

Stanley, Ryan R. E.; Pedersen, Eric J.; Snelgrove, Paul V. R.

doi:10.3354/meps11779

Cited by 11 publications

(18 citation statements)

References 105 publications

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“…Future work with a finer-resolution version of this model may better capture the effects of local bathymetry, eddy diffusion, and tidal stirring that are thought to exert greater influences on nearshore drift and circulation than larger-scale advection due to currents and winds (Largier 2003). Models should also work towards integrating more realistic behaviours of lobster larvae, such as i) 'horizontal' swimming of stage IV larvae in relation to currents, which may alter drift trajectories (Katz et al 1994), ii) diel vertical migrations by stages I, II, and III (Harding et al 1987;Stanley et al 2016), which may increase retention in areas with high velocity offshore currents, such as the Gaspé region (Hill 1991;Brickman and Drozdowski 2012b;Galbraith et al 2013), and iii) settlement decisions of stage IV lobsters in relation to substrate, which can markedly affect search behaviours and likelihood of settlement in the lab (Botero and Atema 1982) and varies markedly over the species' range.…”

Section: Large-scale Spatial Patterns Of Potential Connectivitymentioning

confidence: 99%

“…After hatching, lobster larvae develop through four stages (I, II, III, and IV) that drift in surface waters (Factor 1995). The larval stages, especially stages I-III, are not particularly strong swimmers (Factor 1995;Stanley et al 2016) and are usually assumed to disperse passively with currents, although swimming ability of stage IV is higher (Cobb et al 1989a;Stanley et al 2016) and may impact dispersal and connectivity (Katz et al 1994). Settlement occurs about halfway through stage IV if sea bottom with suitable substrate and temperature is found, at which point the benthic phase begins (Botero and Atema 1982;Cobb et al 1989a, b).…”

Section: Introductionmentioning

confidence: 99%

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Potential connectivity among American lobster fisheries as a result of larval drift across the species’ range in eastern North America

Quinn

Chassé

Rochette

2017

Preprint

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We used a bio-physical model to estimate for the first time the effect of larval drift on potential connectivity among American lobster (Homarus americanus) fisheries management areas over the geographic range of the species. The model predicted drift of larvae over distances of 50-805 km (mean = 129 km), which connected many management areas and caused marked spatial heterogeneity in retention and self-seeding versus export and import of larvae by different fisheries areas. Including mortality functions in the model resulted in less drift and settlement, and had complex effects on the amount, but not the incidence, of potential connectivity among fisheries. The model’s predictions received support from comparison of predicted settlement to landings six or seven years later in some (but not all) parts of the model domain. Although improvements are still needed to capture larval behaviours and spatial variability in larval release and mortality across the species’ range, this information is important to lobster fisheries management because the amount and direction of connectivity between fisheries can inform cooperative management strategies to sustain interconnected fisheries.

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Section: Large-scale Spatial Patterns Of Potential Connectivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potential connectivity among American lobster fisheries as a result of larval drift across the species’ range in eastern North America

Quinn

Chassé

Rochette

2017

Preprint

View full text Add to dashboard Cite

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“…Throughout this developmental period, they occur in the water column, dispersing over a wide range distances before setting (Incze et al 2010;Chassé and Miller 2010). Behavioural studies suggest that all four lobster larval stages are behaviourally competent (Ennis 1986;Stanley et al 2016) can actively mediate their vertical position in the water column (Ennis 1975a). Generally, only the post-larvae are considered strong horizontal swimmers (Ennis 1986;Cobb et al 1989).…”

Section: R a F Tmentioning

confidence: 99%

Experimental evidence for concentration-dependence and intraspecific variation of movement behaviour in American lobster (Homarus americanus) larvae

et al. 2017

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Predicting dispersal paths of marine larvae with extended pelagic durations, such as American lobster (Homarus americanus H. Milne Edwards, 1837), requires understanding the cues to which larvae respond, and how that response reflects changes in larval behaviour. If larvae respond to conspecific presence by varying their movement, then this behaviour can bias laboratory estimates of environmental responses. We tested whether larvae actively decreased their local intraspecific density by measuring how the vertical distribution of larvae changed under high versus low concentrations of conspecifics. We observed weak increases in vertical dispersion at higher concentrations both in newly hatched larvae and in postlarvae, but not in intermediate larval stages. We also tested for differences in horizontal swimming behaviour in high and low concentrations, by fitting a novel random walk model that allowed us to model both larval interactions and persistent turning behaviours. We showed substantial reduction in diffusive behaviour under high concentration conditions resulting from more frequent turns by each larva, but no evidence for consistent avoidance of conspecifics. Our study is the first to demonstrate concentration-dependent behaviours in lobster larvae.

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“…Therefore, for each path observed in each video, we estimated the long-term diffusion coefficient for that individual, assuming it followed a correlated random walk with no directional bias or turning angle bias (Kareiva and Shigesada, 1983). We showed previously that this method effectively captures patterns of mean squared displacement in larval lobsters under similar experimental conditions (Stanley et al, 2016). We sub-sampled each path to one frame per second, to reduce correlation between turn angles in each step and estimated the diffusion coefficient for path i as:…”

Section: Calculating Horizontal Diffusion Coefficientsmentioning

confidence: 99%

Experimental evidence for concentration-dependence and intra-specific variation of movement behaviour in American lobster (Homarus americanus) larvae

Pedersen

Stanley

Snelgrove

et al. 2016

Preprint

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Predicting dispersal paths of marine larvae with long pelagic durations, such as American lobster (Homarus americanus), requires understanding the cues to which larvae respond, and how that response reflects changes in larval behaviour. If larvae respond to conspecific presence by varying their movement, this behaviour can bias laboratory estimates of environmental responses. We tested whether larvae actively decreased their local intraspecific density by measuring how the vertical distribution of larvae changed under high versus low concentrations of conspecifics. We observed weak increases in vertical dispersion at higher concentrations in both newly-hatched larvae and in post-larvae, but not in intermediate larval stages. Further, we found that larvae from different mothers consistently differed in vertical distribution, which may indicate maternal effects on dispersal behavior. We also tested for differences in horizontal swimming behaviour in high and low concentrations, by fitting a novel random walk model that allowed us to model both larval interactions and persistent turning behaviours. We showed substantial reduction in diffusive behaviour under high concentration conditions resulting from more frequent turns by each larva, but no evidence for consistent avoidance of conspecifics. Our study is the first to demonstrate concentration-dependent behaviours in lobster larvae.

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Biogeographic, ontogenetic, and environmental variability in larval behaviour of American lobster Homarus americanus

Cited by 11 publications

References 105 publications

Potential connectivity among American lobster fisheries as a result of larval drift across the species’ range in eastern North America

Potential connectivity among American lobster fisheries as a result of larval drift across the species’ range in eastern North America

Experimental evidence for concentration-dependence and intraspecific variation of movement behaviour in American lobster (Homarus americanus) larvae

Experimental evidence for concentration-dependence and intra-specific variation of movement behaviour in American lobster (Homarus americanus) larvae

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