Determining the extent and spatial scale of population connectivity: decapods and coral reef fishes compared

Sale, Peter F.; Kritzer, Jacob P.

doi:10.1016/j.fishres.2003.09.013

Cited by 51 publications

(37 citation statements)

References 152 publications

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“…It may be argued, however, that larvae produced by a peak spawning event could potentially follow multiple dispersal pathways (as indicated by our modeled trajectories), which in conjunction with high and variable levels of larval mortality could result in settlement patterns largely independent of patterns at the time of spawning (Sale and Kritzer 2003). Indeed, we did not record large settlement pulses during the autumn of every year or with the passage of every tropical storm, but the extreme settlement pulses associated with hurricane systems greatly influenced the interannual autumn settlement peak.…”

Section: Discussionmentioning

confidence: 93%

Postlarval settlement of the spiny lobster Panulirus argus along the Caribbean coast of Mexico: Patterns, influence of physical factors, and possible sources of origin

Briones‐Fourzán

Candela²,

Lozano‐Álvarez

2008

Limnology & Oceanography

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We analyzed and compared 17 yr of monthly settlement indices of postlarvae of the Caribbean spiny lobster, Panulirus argus, at two locations on the Mexican Caribbean coast. Along this coast, the shelf is very narrow and the local circulation is driven by waves overtopping subtidal coral reef crests. Settlement occurred year-round, but both locations showed annual rhythmicity, average seasonal maxima during the autumn, and similar interannual variation, reflecting the influence of mesoscale oceanographic processes on settlement. Significant correlations between settlement indices and a number of interrelated physical factors indicate that sea-level variation is the main factor influencing settlement. There was further association between extreme settlement pulses and extreme weather events (tropical storms and hurricanes) during the late summer-autumn. The autumn settlement peak indicates that large hurricane waves enhance the onshore transport of postlarvae that originated during the spring spawning peak. The geographic range of potential sources of larvae that settle along this coast during the periods of March-April and September-October, 5-9 months after hatching (the estimated larval duration for P. argus), was investigated by stochastic simulations integrating passive trajectories backward in time using 6 yr of stable outputs from a well-established numerical model for the entire Atlantic Ocean. Trajectories from the model indicate that the local population of P. argus depends to a large extent on larval supply from many potential source regions across and outside the Caribbean but that some larvae follow pathways that permit selfrecruitment.

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Section: Discussionmentioning

confidence: 93%

Postlarval settlement of the spiny lobster Panulirus argus along the Caribbean coast of Mexico: Patterns, influence of physical factors, and possible sources of origin

Briones‐Fourzán

Candela²,

Lozano‐Álvarez

2008

Limnology & Oceanography

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“…Because these fishes are too small to be fished, increased densities would be expected if reserves were effective at retaining the larvae of the protected adult stocks or if reserves facilitated settlement (e.g., via conspecific attraction). Although conspecific attraction (Schmitt andHolbrook 1996, Lecchini et al 2007a) and local retention of larvae (Swearer et al 1999, Almany et al 2007) has been demonstrated for a few fishes, a better understanding of larval transport and settlement, and the spatial scales over which they operate, is required to appropriately evaluate these hypotheses (Sale andKritzer 2003, Cowen andSponaugle 2009). There were insufficient numbers of shallow-water specialists to draw a clear picture of the effect of adult depth distribution; however, commercial exploited species with broad depth ranges (that included ,10 m) showed strong responses to protection while mid-range species (inhabiting 10-50 m) did not (Fig.…”

Section: Discussionmentioning

confidence: 99%

Marine reserves: Fish life history and ecological traits matter

Claudet

Osenberg

Domenici

et al. 2010

Ecological Applications

242

221

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Abstract. Marine reserves are assumed to protect a wide range of species from deleterious effects stemming from exploitation. However, some species, due to their ecological characteristics, may not respond positively to protection. Very little is known about the effects of life history and ecological traits (e.g., mobility, growth, and habitat) on responses of fish species to marine reserves. Using 40 data sets from 12 European marine reserves, we show that there is significant variation in the response of different species of fish to protection and that this heterogeneity can be explained, in part, by differences in their traits. Densities of targeted sizeclasses of commercial species were greater in protected than unprotected areas. This effect of protection increased as the maximum body size of the targeted species increased, and it was greater for species that were not obligate schoolers. However, contrary to previous theoretical findings, even mobile species with wide home ranges benefited from protection: the effect of protection was at least as strong for mobile species as it was for sedentary ones. Noncommercial bycatch and unexploited species rarely responded to protection, and when they did (in the case of unexploited bentho-pelagic species), they exhibited the opposite response: their densities were lower inside reserves. The use of marine reserves for marine conservation and fisheries management implies that they should ensure protection for a wide range of species with different life-history and ecological traits. Our results suggest this is not the case, and instead that effects vary with economic value, body size, habitat, depth range, and schooling behavior.

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“…Recent empirical studies have demon strated that most pelagic larvae are not passively transported during larval development but rather show vertical swimming behaviours that lead to species-specific vertical distribution of larvae that may change with ontogeny or with diel or tidal cycles (Forward & Tankersley 2001, Morgan 2001, Sale & Kritzer 2003, Queiroga & Blanton 2005. Because the velocity and direction of coastal ocean currents often vary with depth, the vertical position of pelagic propagules may critically affect their dispersal.…”

Section: Introductionmentioning

confidence: 99%

Depth distribution of larvae critically affects their dispersal and the efficiency of marine protected areas

Corell¹,

Moksnes²,

Engqvist³

et al. 2012

Mar. Ecol. Prog. Ser.

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This study aims to improve estimates of dispersal by including information on larval traits, and in particular to explore how larval depth distribution affects connectivity and MPA (marine protected area) functionality in the Baltic Sea. A field survey showed that both invertebrates and fish differed in their larval depth distribution, ranging from surface waters to >100 m. A biophysical model of larval dispersal in the Baltic Sea showed that decreased depth distribution increased average dispersal distance 2.5-fold, decreased coastal retention and local recruitment, and substantially increased connectivity. Together with pelagic larval duration (PLD), depth distribution explained 80% of total variation in dispersal distance, whereas spawning season, and geographic and annual variations in circulation had only marginal effects. Median dispersal distances varied between 8 and 46 km, with 10% of simulated trajectories dispersing 30 to 160 km depending on drift depth and PLD. In the Baltic Sea, the majority of shallow Natura 2000 MPAs are < 8 km in diameter. In the present study, only 1 of the 11 assessed larval taxa would have a recruitment >10% within MPAs of this size. Connectivity between MPAs was expected to be low for most larval trait combinations. Our simulations and the empirical data suggest that the MPA size within the Natura 2000 system is considerably below what is required for local recruitment of most sessile invertebrates and sedentary fish. Future designs of MPA networks would benefit from spatially explicit biophysical models that consider dispersal and connectivity for complex circulation patterns and informed larval traits.

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Determining the extent and spatial scale of population connectivity: decapods and coral reef fishes compared

Cited by 51 publications

References 152 publications

Postlarval settlement of the spiny lobster Panulirus argus along the Caribbean coast of Mexico: Patterns, influence of physical factors, and possible sources of origin

Postlarval settlement of the spiny lobster Panulirus argus along the Caribbean coast of Mexico: Patterns, influence of physical factors, and possible sources of origin

Marine reserves: Fish life history and ecological traits matter

Depth distribution of larvae critically affects their dispersal and the efficiency of marine protected areas

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