Self‐recruitment and sweepstakes reproduction amid extensive gene flow in a coral‐reef fish

Molecular Ecology, Journal Year: 2010, Volume and Issue: 19(5), P. 1042 - 1057

Published: Jan. 20, 2010

Abstract Identifying patterns of larval dispersal within marine metapopulations is vital for effective fisheries management, appropriate reserve design, and conservation efforts. We employed genetic markers (microsatellites) to determine in bicolour damselfish (Pomacentridae: Stegastes partitus ). Tissue samples 751 fish were collected 2004 2005 from 11 sites encompassing the Exuma Sound, Bahamas. Bayesian parentage analysis identified two parent–offspring pairs, which remarkable given large population sizes 28 day pelagic duration damselfish. The pairs directly documented self‐recruitment at northern‐most sites, one a long‐established reserve. Principal coordinates analyses pair‐wise relatedness values further indicated that was common all sampled populations. Nevertheless, measures differentiation ( F ST ) results assignment methods suggested high levels gene flow among Comparisons heterozygosity adults recruits spatially temporally independent sweepstakes events, whereby only subset successfully contribute subsequent generations. These indicate reproduction are predominant, ecologically‐relevant processes shape this system.

Language: Английский

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Management under uncertainty: guide-lines for incorporating connectivity into the protection of coral reefs

Coral Reefs, Journal Year: 2009, Volume and Issue: 28(2), P. 353 - 366

Published: Feb. 12, 2009

Language: Английский

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Connectivity of Caribbean coral populations: complementary insights from empirical and modelled gene flow

Molecular Ecology, Journal Year: 2012, Volume and Issue: 21(5), P. 1143 - 1157

Published: Jan. 25, 2012

Abstract Understanding patterns of connectivity among populations marine organisms is essential for the development realistic, spatially explicit models population dynamics. Two approaches, empirical genetic and oceanographic dispersal modelling, have been used to estimate levels evolutionary but rarely their potentially complementary insights combined. Here, a realistic Lagrangian model larval theoretical are integrated with most extensive study gene flow in Caribbean organism. The 871 genets collected from 26 sites spread over wider subsampled 45.8% 1900 potential unique model. At coarse scale, significant consensus between modelled estimates structure data reef‐building coral Montastraea annularis observed. However, differ northern Mesoamerican reefs indicating that processes other than may dominate here. Further, geographic location porosity previously described east–west barrier refined. A multi‐prong approach, integrating projection, provides into underpinning invertebrates on timescales.

Language: Английский

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Realized and potential larval connectivity in the Southern California Bight

Marine Ecology Progress Series, Journal Year: 2009, Volume and Issue: 401, P. 31 - 48

Published: Nov. 4, 2009

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 401:31-48 (2010) - DOI: https://doi.org/10.3354/meps08376 Realized and potential larval connectivity in Southern California Bight J. R. Watson1,*, S. Mitarai1,4, D. A. Siegel1, E. Caselle2, C. Dong3, McWilliams3 1Institute for Computational Earth System Science, 2Marine Science Institute, University of California, Santa Barbara, 93106, USA 3Institute Geophysics Planetary Physics, Los Angeles, 90095, 4Present address: Biophysics Unit, Okinawa Institute Technology, 904-0411, Japan *Email: [email protected] ABSTRACT: Populations many nearshore marine species are connected through dispersal their larvae. In this paper, patterns explored using 2 quantities: realized connectivity. Potential is defined as probability transport from a source destination location quantified Lagrangian particle simulations. product with production can be used estimate settlement patterns. kelp bass Paralabrax clathratus, rockfish Sebastes atrovirens, red abalone Haliotis rufescens, 3 range characteristics. Connectivity were found both heterogeneous, locations having different strengths, asymmetric, directionality transport. Both strongly influenced by length timing spawning season well planktonic duration. For rockfish, strong correspondence was between locations, suggesting that circulation processes have dominant role shaping spatial distribution these species. Strong temporal variability observed on seasonal inter-annual time scales (particularly El Niño La Niña conditions). These results provide novel information use fisheries conservation management. KEY WORDS: Larval · Ocean simulation Spatial management Full text pdf format PreviousNextCite article as: Watson JR, Mitarai S, Siegel DA, Caselle JE, Dong C, McWilliams JC Bight. Mar Ecol Prog Ser 401:31-48. Export citation Tweet linkedIn Cited Published Vol. 401. Online publication date: February 22, 2010 Print ISSN: 0171-8630; 1616-1599 Copyright © Inter-Research.

Language: Английский

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Incorporating biogeography into evaluations of the Channel Islands marine reserve network

Proceedings of the National Academy of Sciences, Journal Year: 2010, Volume and Issue: 107(43), P. 18272 - 18277

Published: Feb. 22, 2010

Networks of marine reserves are increasingly a major component many ecosystem-based management plans designed to conserve biodiversity, protect the structure and function ecosystems, rebuild sustain fisheries. There is growing need for scientific guidance in design network-wide monitoring programs evaluate efficacy at meeting their conservation goals. Here, we present an evaluation Channel Islands reserve network, which was established 2003 off coast southern California. This network spans environmental biogeographic gradient, making it challenge assess responses species. Using fish community data from long-term, large-scale program, first identified persistent geographic patterns scale sites should be grouped analysis. Fish communities differed most among islands with densities individual species varying 3- 250-fold. Habitat but not based on status. Across found that, after 5 years, targeted by fishing had higher (1.5×) biomass (1.8×) inside reserves, whereas nontargeted showed no significant differences. Examining trophic groups, piscivore carnivore significantly greater (1.8× 1.3× more, respectively), planktivores herbivores similar out. A framework incorporating variation into assessments critical as move single networks reserves.

Language: Английский

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Persistence of self‐recruitment and patterns of larval connectivity in a marine protected area network

Ecology and Evolution, Journal Year: 2012, Volume and Issue: 2(2), P. 444 - 452

Published: Feb. 1, 2012

The use of marine protected area (MPA) networks to sustain fisheries and conserve biodiversity is predicated on two critical yet rarely tested assumptions. Individual MPAs must produce sufficient larvae that settle within reserve's boundaries maintain local populations while simultaneously supplying other MPA nodes in the network might otherwise suffer extinction. Here, we genetic parentage analysis demonstrate patterns self-recruitment reef fishes (Amphiprion percula Chaetodon vagabundus) an Kimbe Bay, Papua New Guinea, were remarkably consistent over several years. However, dispersal from this reserve varied between species through time. stability our estimates suggests even small may be self-sustaining. results caution against applying optimization strategies design without accounting for variable connectivity among

Language: Английский

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Larval Connectivity and the International Management of Fisheries

PLoS ONE, Journal Year: 2013, Volume and Issue: 8(6), P. e64970 - e64970

Published: June 7, 2013

Predicting the oceanic dispersal of planktonic larvae that connect scattered marine animal populations is difficult, yet crucial for management species whose movements transcend international boundaries. Using multi-scale biophysical modeling techniques coupled with empirical estimates larval behavior and gamete production, we predict empirically verify spatio-temporal patterns supply describe Caribbean-wide pattern connectivity Caribbean spiny lobster (Panulirus argus), an iconic coral reef commercial value approaches $1 billion USD annually. Our results provide long sought information needed cooperation in resources by identifying pathways throughout Caribbean. Moreover, outline how large-scale fishery could explicitly recognize metapopulation structure considering transport dynamics pelagic sanctuaries.

Language: Английский

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Patterns, causes, and consequences of marine larval dispersal

Proceedings of the National Academy of Sciences, Journal Year: 2015, Volume and Issue: 112(45), P. 13940 - 13945

Published: Oct. 27, 2015

Significance Networks of marine protected areas (MPAs) have been widely implemented to combat global population declines. Although their efficacy largely depends on larval exchange between populations, quantitative analyses dispersal limited due the difficulties tracking larvae. Here, we systematically measure in fish Elacatinus lori , producing first robust estimate a kernel. We find that declines exponentially, with most larvae traveling less than 2 km from parents. Remarkably, distance an individual travels is unrelated number days it spends phase. These results suggest simple distance-based models may be useful conservation tools and MPAs are close space will accommodate short-distance dispersers.

Language: Английский

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Ecological effects of marine protected areas on rocky reef communities—a continental-scale analysis

Marine Ecology Progress Series, Journal Year: 2009, Volume and Issue: 388, P. 51 - 62

Published: June 12, 2009

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 388:51-62 (2009) - DOI: https://doi.org/10.3354/meps08149 Ecological effects of marine protected areas on rocky reef communities—a continental-scale analysis Graham J. Edgar*, Rick D. Stuart-Smith Tasmanian Aquaculture and Fisheries Institute, University Tasmania, Private bag 49, Hobart, Tasmania 7001, Australia *Email: [email protected] ABSTRACT: Data compiled by volunteer divers were utilised in a investigation ecological differences between reefs no-take sanctuary zones (MPAs) adjacent fished zones. In validation analysis, volunteer-generated data found be comparable obtained scientific dive teams for all metrics investigated: estimated total number species, faunal abundance, mean fish size, composition species sighted along transects. Variation individual within professional groups also contributed little variance transects compared residual variation replicate transects, sites, regions studied. Sites 11 MPAs distributed around 5000 km Australian coastline had significantly more large (>30 cm) fishes biomass than nearby reference sites. For older MPAs, belonging largest size class (≥80 observed approximately 10 times often zones, while smallest (2.5 occurred at densities 4 higher Results empirical field surveys contrast several respects with outcomes published meta-analyses. No overall evident The response richness protection varied different invertebrate density both lower KEY WORDS: Effects fishing · reserve MPA Fishes Macroinvertebrates Species Volunteer monitoring Full text pdf format PreviousNextCite this article as: Edgar GJ, RD analysis. Mar Ecol Prog Ser 388:51-62. Export citation Tweet linkedIn Cited Published Vol. 388. Online publication date: August 19, 2009 Print ISSN: 0171-8630; 1616-1599 Copyright © Inter-Research.

Language: Английский

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Identifying critical regions in small-world marine metapopulations

Proceedings of the National Academy of Sciences, Journal Year: 2011, Volume and Issue: 108(43)

Published: Oct. 10, 2011

The precarious state of many nearshore marine ecosystems has prompted the use protected areas as a tool for management and conservation. However, there remains substantial debate over their design and, in particular, how to best account spatial dynamics species. Many commercially important species are sedentary adults, with limited home ranges. It is larvae that they disperse greater distances, traveling ocean currents sometimes hundreds kilometers. As result, these exist spatially complex systems connected subpopulations. Here, we explicitly mutual dependence subpopulations approach area terms network robustness. Our goal characterize topology metapopulation networks response perturbation, identify critical whose protection would reduce risk stock collapse. We define using realistic estimates larval dispersal generated from circulation simulations explicit models, then explore robustness node-removal simulation experiments. Nearshore metapopulations show small-world properties, set highly hub removal maximally disrupts network. Protecting reduces systemic failure focus on catastrophe avoidance provides unique perspective planning areas.

Language: Английский

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