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Reis AC, Amaral D, Americo JA, Rebelo MF, Sousa SM. Cytogenetic characterization of the golden mussel (Limnoperna fortunei) reveals the absence of sex heteromorphic chromosomes. AN ACAD BRAS CIENC 2023; 95:e20201622. [PMID: 37341265 DOI: 10.1590/0001-3765202320201622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 05/12/2021] [Indexed: 06/22/2023] Open
Abstract
The golden mussel (Limnoperna fortunei) is an aggressive invasive species in South America, where it endangers native species and freshwater ecosystems, in addition to causing extensive economic losses, mainly to the hydroelectric sector. Currently, there's no efficient control method available and the invasion has progressed across the continent. Its high reproduction rate is one of the key factors of the golden mussel's high invasive potential and, recently, efforts have been done in order to understand the reproduction and the sexual features of this species. However, its cytogenetics characterization is incipient and the possible occurrence of sex-specific cytogenetic features was never investigated. In this study, we aimed to characterize the chromosomal morphometry, the distribution profile of heterochromatin, and to detect possible sex-related epigenetic marks in the golden mussel. Results revealed that the karyotypic structure is similar in both sexes and no chromosome heteromorphism was observed between males and females specimens. The data increment the cytogenetic characterization of Limnoperna fortunei and contribute for future studies that aim to further investigate its reproduction and underlying sex determination processes.
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Affiliation(s)
- Aryane C Reis
- Universidade Federal de Juiz de Fora, Departamento de Biologia, Laboratório de Genética e Biotecnologia, Rua José Lourenço Kelmer, s/n, 36036-900 Juiz de Fora, MG, Brazil
| | - Danielle Amaral
- Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Avenida Carlos Chagas Filho, 373, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Juliana A Americo
- Bio Bureau Biotecnologia, Rua Aloísio Teixeira, 278, Prédio 3, sala 310, 21941-850 Rio de Janeiro, RJ, Brazil
| | - Mauro F Rebelo
- Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Avenida Carlos Chagas Filho, 373, 21941-902 Rio de Janeiro, RJ, Brazil
| | - Saulo M Sousa
- Universidade Federal de Juiz de Fora, Departamento de Biologia, Laboratório de Genética e Biotecnologia, Rua José Lourenço Kelmer, s/n, 36036-900 Juiz de Fora, MG, Brazil
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2
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Lins DM, Rocha RM. Marine aquaculture as a source of propagules of invasive fouling species. PeerJ 2023; 11:e15456. [PMID: 37334117 PMCID: PMC10269578 DOI: 10.7717/peerj.15456] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 05/03/2023] [Indexed: 06/20/2023] Open
Abstract
Non-indigenous species tend to colonize aquaculture installations, especially when they are near international ports. In addition to the local environmental hazard that colonizing non-indigenous species pose, they can also take advantage of local transport opportunities to spread elsewhere. In this study, we examined the risk of the spread of eight invasive fouling species that are found in mussel farms in southern Brazil. We used ensemble niche models based on worldwide occurrences of these species, and environmental variables (ocean temperature and salinity) to predict suitable areas for each species with three algorithms (Maxent, Random Forest, and Support Vector Machine). As a proxy for propagule pressure, we used the tonnage transported by container ships from Santa Catarina (the main mariculture region) that travel to other Brazilian ports. We found that ports in the tropical states of Pernambuco, Ceará, and Bahia received the largest tonnage, although far from Santa Catarina and in a different ecoregion. The ascidians Aplidium accarense and Didemnum perlucidum are known from Bahia, with a high risk of invasion in the other states. The bryozoan Watersipora subtorquata also has a high risk of establishment in Pernambuco, while the ascidian Botrylloides giganteus has a medium risk in Bahia. Paraná, a state in the same ecoregion as Santa Catarina is likely to be invaded by all species. A second state in this region, Rio Grande do Sul, is vulnerable to A. accarense, the barnacle Megabalanus coccopoma, and the mussel Mytilus galloprovincialis. Climate change is changing species latitudinal distributions and most species will gain rather than lose area in near future (by 2050). As an ideal habitat for fouling organisms and invasive species, aquaculture farms can increase propagule pressure and thus the probability that species will expand their distributions, especially if they are close to ports. Therefore, an integrated approach of the risks of both aquaculture and nautical transport equipment present in a region is necessary to better inform decision-making procedures aiming at the expansion or establishment of new aquaculture farms. The risk maps provided will allow authorities and regional stakeholders to prioritize areas of concern for mitigating the present and future spread of fouling species.
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Affiliation(s)
- Daniel M. Lins
- Ecology and Conservation Graduate Program, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
| | - Rosana M. Rocha
- Zoology Department, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
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Paolucci EM, Ron L, Thuesen EV. Metabolic response to increasing environmental temperature in the invasive mussel
Limnoperna fortunei. AUSTRAL ECOL 2022. [DOI: 10.1111/aec.13161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Esteban Marcelo Paolucci
- Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”‐CONICET Av. Angel Gallardo 470 Buenos Aires C1405DJR Argentina
| | - Leila Ron
- Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”‐CONICET Av. Angel Gallardo 470 Buenos Aires C1405DJR Argentina
| | - Erik V. Thuesen
- The Evergreen State College, Lab 1 Olympia Washington 98505 USA
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Clutton EA, Alurralde G, Repolho T. Early developmental stages of native populations of Ciona intestinalis under increased temperature are affected by local habitat history. J Exp Biol 2021; 224:jeb233403. [PMID: 33472872 PMCID: PMC7938807 DOI: 10.1242/jeb.233403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/06/2021] [Indexed: 11/20/2022]
Abstract
Temperature modulates marine ectotherm physiology, influencing survival, abundance and species distribution. While native species could be susceptible to ocean warming, thermal tolerance might favour the spread of non-native species. Determining the success of invasive species in response to climate change is confounded by the cumulative, synergistic or antagonistic effects of environmental drivers, which vary at a geographical and temporal scale. Thus, an organism's acclimation or adaptive potential could play an important evolutionary role by enabling or conditioning species tolerance to stressful environmental conditions. We investigated developmental performance of early life stages of the ascidian Ciona intestinalis (derived from populations of anthropogenically impacted and control sites) to an extreme weather event (i.e. marine heatwave). Fertilization rate, embryo and larval development, settlement, metamorphosis success and juvenile heart rate were assessed as experimental endpoints. With the exception of fertilization and heart rates, temperature influenced all analysed endpoints. C. intestinalis derived from control sites were the most negatively affected by increased temperature conditions. By contrast, C. intestinalis from anthropogenically impacted sites showed a positive response to thermal stress, with a higher proportion of larvae development, settlement and metamorphosis success being observed under increased temperature conditions. No differences were observed for heart rates between sampled populations and experimental temperature conditions. Moreover, interaction between temperature and populations was statistically significant for embryo and larvae development, and metamorphosis. We hypothesize that selection resulting from anthropogenic forcing could shape stress resilience of species in their native range and subsequently confer advantageous traits underlying their invasive potential.
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Affiliation(s)
- Elizabeth A Clutton
- Institute of Marine Sciences, Faculty of Science and Health, University of Portsmouth, Eastney, Portsmouth PO4 9LY, UK
| | - Gaston Alurralde
- Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Departamento Diversidad Biológica y Ecología, Ecología Marina, Av. Velez Sarsfield 299 (X5000JJC), Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Diversidad y Ecologıa Animal (IDEA), Av. Velez Sarsfield 299 (X5000JJC), Córdoba, Argentina
| | - Tiago Repolho
- MARE - Centro de Ciências do Mar e do Ambiente (MARE), Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal
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Furlan‐Murari PJ, Ruas CDF, Ruas EA, Benício LM, Urrea‐Rojas AM, Poveda‐Parra AR, Murari E, de Lima ECS, de Souza FP, Lopera‐Barrero NM. Structure and genetic variability of golden mussel ( Limnoperna fortunei) populations from Brazilian reservoirs. Ecol Evol 2019; 9:2706-2714. [PMID: 30891210 PMCID: PMC6405496 DOI: 10.1002/ece3.4941] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 11/21/2022] Open
Abstract
The golden mussel, Limnoperna fortunei a highly invasive species in Brazil, has generated productive, economical, and biological impacts. To evaluate genetic structure and variability of L. fortunei populations present in fish farms in the reservoirs of Canoas I (CANFF), Rosana (ROSFF), and Capivara (CAPFF) (Paranapanema River, Paraná, Brazil), eight microsatellite loci were amplified. Five of those eight loci resulted in 38 alleles. The observed heterozygosity (Ho) was lower than the expected heterozygosity (He) in all populations, with a deviation from the Hardy-Weinberg equilibrium (HWE). The average value for the inbreeding coefficient (Fis) was positive and significative for all populations. There was higher genetic variability within populations than among them. The fixation index (Fst) showed a small genetic variability among these populations. The occurrence of gene flow was identified in all populations, along with the lack of a recent bottleneck effect. The clustering analysis yielded K = 2, with genetic similarity between the three populations. The results demonstrate low genetic structure and suggest a founding population with greater genetic variability (ROSFF). Our data point to the possible dispersal of L. fortunei aided by anthropic factors in the upstream direction. It was concluded that the three populations presented a unique genetic pool for Paranapanema River, with occurrence of gene flow.
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Bourne SD, Hudson J, Holman LE, Rius M. Marine Invasion Genomics: Revealing Ecological and Evolutionary Consequences of Biological Invasions. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/13836_2018_21] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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7
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Lins DM, de Marco P, Andrade AFA, Rocha RM. Predicting global ascidian invasions. DIVERS DISTRIB 2018. [DOI: 10.1111/ddi.12711] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Daniel M. Lins
- Ecology and Conservation Graduate Program; Universidade Federal do Paraná; Curitiba Brazil
| | - Paulo de Marco
- Ecology and Evolution Graduate Program; Universidade Federal de Goiás; Goiania Brazil
| | - Andre F. A. Andrade
- Ecology and Evolution Graduate Program; Universidade Federal de Goiás; Goiania Brazil
| | - Rosana M. Rocha
- Ecology and Conservation Graduate Program; Universidade Federal do Paraná; Curitiba Brazil
- Zoology Department; Universidade Federal do Paraná; Curitiba Brazil
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8
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Genetic diversity of a hitchhiker and prized food source in the Anthropocene: the Asian green mussel Perna viridis (Mollusca, Mytilidae). Biol Invasions 2018. [DOI: 10.1007/s10530-018-1659-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Pie MR, Ströher PR, Agostinis AO, Belmonte-Lopes R, Tadra-Sfeir MZ, Ostrensky A. Development of a real-time PCR assay for the detection of the golden mussel ( Limnoperna fortunei , Mytilidae) in environmental samples. AN ACAD BRAS CIENC 2017. [PMID: 28640350 DOI: 10.1590/0001-3765201720160723] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The golden mussel, Limnoperna fortunei, is among the most devastating invasive species in freshwater habitats worldwide, leading to severe environmental disturbances and economic losses. Therefore, management efforts would be greatly improved by methods that efficiently detect and quantify the abundance of the golden mussel in freshwater habitats, particularly in early stages of colonization. In this study, we describe a highly-sensitive real-time PCR assay targeting a 100-bp region of the COI mitochondrial gene of the golden mussel. The method was able to detect as little as 0.225 pg of target DNA. This assay represents an important contribution to surveillance methods, as well as to optimize field measures to contain and manage populations of the golden mussel in its introduced range.
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Affiliation(s)
- Marcio R Pie
- Departamento de Zoologia, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, 100, Jardim das Américas, 81531-980 Curitiba, PR, Brazil
| | - Patrícia R Ströher
- Departamento de Zoologia, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, 100, Jardim das Américas, 81531-980 Curitiba, PR, Brazil
| | - André O Agostinis
- Departamento de Zoologia, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, 100, Jardim das Américas, 81531-980 Curitiba, PR, Brazil
| | - Ricardo Belmonte-Lopes
- Departamento de Zoologia, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, 100, Jardim das Américas, 81531-980 Curitiba, PR, Brazil
| | - Michelle Z Tadra-Sfeir
- Departamento de Bioquímica, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, 100, Jardim das Américas, 81531-980 Curitiba, PR, Brazil
| | - Antonio Ostrensky
- Departamento de Zootecnia, Universidade Federal do Paraná, Rua dos Funcionários, 1540, Juvevê, 80035-050 Curitiba, PR, Brazil
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10
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Characterisation of Reproduction-Associated Genes and Peptides in the Pest Land Snail, Theba pisana. PLoS One 2016; 11:e0162355. [PMID: 27706146 PMCID: PMC5051934 DOI: 10.1371/journal.pone.0162355] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 08/22/2016] [Indexed: 01/18/2023] Open
Abstract
Increased understanding of the molecular components involved in reproduction may assist in understanding the evolutionary adaptations used by animals, including hermaphrodites, to produce offspring and retain a continuation of their lineage. In this study, we focus on the Mediterranean snail, Theba pisana, a hermaphroditic land snail that has become a highly invasive pest species within agricultural areas throughout the world. Our analysis of T. pisana CNS tissue has revealed gene transcripts encoding molluscan reproduction-associated proteins including APGWamide, gonadotropin-releasing hormone (GnRH) and an egg-laying hormone (ELH). ELH isoform 1 (ELH1) is known to be a potent reproductive peptide hormone involved in ovulation and egg-laying in some aquatic molluscs. Two other non-CNS ELH isoforms were also present in T. pisana (Tpi-ELH2 and Tpi-ELH3) within the snail dart sac and mucous glands. Bioactivity of a synthetic ELH1 on sexually mature T. pisana was confirmed through bioassay, with snails showing ELH1-induced egg-laying behaviours, including soil burrowing and oviposition. In summary, this study presents a detailed molecular analysis of reproductive neuropeptide genes in a land snail and provides a foundation for understanding ELH function.
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11
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Adrian-Kalchhauser I, Hirsch PE, Behrmann-Godel J, N'Guyen A, Watzlawczyk S, Gertzen S, Borcherding J, Burkhardt-Holm P. The invasive bighead goby Ponticola kessleri displays large-scale genetic similarities and small-scale genetic differentiation in relation to shipping patterns. Mol Ecol 2016; 25:1925-43. [PMID: 26928748 DOI: 10.1111/mec.13595] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 02/12/2016] [Accepted: 02/17/2016] [Indexed: 12/11/2022]
Abstract
Colonization events, range expansions and species invasions leave genetic signatures in the genomes of invasive organisms and produce intricate special patterns. Predictions have been made as to how those patterns arise, but only very rarely, genetic processes can be monitored in real time during range expansions. In an attempt to change that, we track a very recently established invasive population of a fish species, the bighead goby Ponticola kessleri, with high temporal and spatial resolution through 2 years to identify patterns over time. We then compare Swiss and German samples of bighead goby along the river Rhine using microsatellites, mitochondrial D-loop sequences and geometric morphometrics to investigate geographic patterns. We detect weak temporal and strong geographic patterns in the data, which are inconsistent with isolation by distance and indicate long range transport. In search of an explanation for our observations, we analyse the vector properties and travel patterns of commercial vessels on the river Rhine. We present evidence that freshwater cargo ships and tankers are plausible vectors for larvae of invasive goby species. We also present indications that cargo ships and tankers act as differential vectors for this species. In summary, we present genetic data at unique temporal resolution from a vertebrate invasion front and substantiate the paramount role of commercial shipping in freshwater fish translocations.
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Affiliation(s)
- I Adrian-Kalchhauser
- Program Man-Society-Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051, Basel, Switzerland
| | - P E Hirsch
- Program Man-Society-Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051, Basel, Switzerland.,Research Centre for Sustainable Energy and Water Supply, University of Basel, Peter Merian Weg 6, CH-4002, Basel, Switzerland
| | - J Behrmann-Godel
- Limnological Institute, University of Konstanz, Mainaustrasse 252, D-78457, Konstanz, Germany
| | - A N'Guyen
- Program Man-Society-Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051, Basel, Switzerland
| | - S Watzlawczyk
- Zoological Institute of the University of Cologne, Department of General Ecology & Limnology, Ecological Field Station Grietherbusch, D-50923, Cologne, Germany
| | - S Gertzen
- Zoological Institute of the University of Cologne, Department of General Ecology & Limnology, Ecological Field Station Grietherbusch, D-50923, Cologne, Germany
| | - J Borcherding
- Zoological Institute of the University of Cologne, Department of General Ecology & Limnology, Ecological Field Station Grietherbusch, D-50923, Cologne, Germany
| | - P Burkhardt-Holm
- Program Man-Society-Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051, Basel, Switzerland.,Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, AB, Canada
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12
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The complete mitochondrial genome of the golden mussel Limnoperna fortunei and comparative mitogenomics of Mytilidae. Gene 2015; 577:202-8. [PMID: 26639990 DOI: 10.1016/j.gene.2015.11.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/24/2015] [Accepted: 11/25/2015] [Indexed: 01/08/2023]
Abstract
Here we describe the mitochondrial genome of the golden mussel Limnoperna fortunei, an Asian bivalve which has become one of the most aggressive invasive species in Japan and South America. The mitochondrial genome of L. fortunei does not present conserved gene arrangement when compared to the other Mytilidae species suggesting a high degree of gene recombination in the mitochondria of this clade. In addition, the golden mussel mitogenome encodes two copies of tRNA(Lys) and presents a putative pseudogene for the atp8 gene sequence that encodes a 27 amino acid peptide containing an in-frame stop codon. The presence of this pseudogene raises the question as to whether atp8 is encoded in some bivalve mitochondrial genomes or not. The phylogenetic analysis of all complete mitochondrial genomes available from Mytilidae mussels confirmed the close evolutionary relationships among bivalves from the genus Mytilys and placed L. fortunei coming from a more ancestral branch on the family. The supermatrix phylogeny described used the concatenation of all 12 genes from the mitochondria and disputed the monophyly of the genus Perna, as Perna perna was shown to be more closely related to Brachidontes exustus than to Perna viridis. The comparative analysis of mitogenome synteny also confirmed the polyphyly of the genus Perna. The complete and annotated mitogenome has been published in GenBank under the accession number KP756905.
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Coleman RR, Gaither MR, Kimokeo B, Stanton FG, Bowen BW, Toonen RJ. Large-scale introduction of the Indo-Pacific damselfishAbudefduf vaigiensisinto Hawai'i promotes genetic swamping of the endemic congenerA. abdominalis. Mol Ecol 2014; 23:5552-65. [DOI: 10.1111/mec.12952] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 09/29/2014] [Accepted: 09/30/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Richard R. Coleman
- Hawai'i Institute of Marine Biology; University of Hawai'i; P.O. Box 1346 Kaneohe HI 96744 USA
- Department of Biology; University of Hawai'i; Mānoa, 2450 Campus Road, Dean Hall Room 2 Honolulu HI 96822 USA
| | - Michelle R. Gaither
- Section of Ichthyology; California Academy of Sciences; 55 Music Concourse Drive San Francisco CA 94118 USA
- School of Biological and Biomedical Sciences; Durham University; South Road Durham DH1 3LE UK
| | - Bethany Kimokeo
- Hawai'i Institute of Marine Biology; University of Hawai'i; P.O. Box 1346 Kaneohe HI 96744 USA
| | - Frank G. Stanton
- University of Hawai'i Community Colleges; Leeward Community College; 96-045 Ala Ike Pearl City HI 96782 USA
| | - Brian W. Bowen
- Hawai'i Institute of Marine Biology; University of Hawai'i; P.O. Box 1346 Kaneohe HI 96744 USA
| | - Robert J. Toonen
- Hawai'i Institute of Marine Biology; University of Hawai'i; P.O. Box 1346 Kaneohe HI 96744 USA
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14
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Traceability of mussel (Mytilus chilensis) in southern Chile using microsatellite molecular markers and assignment algorithms. Exploratory survey. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.02.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Darling JA. Genetic studies of aquatic biological invasions: closing the gap between research and management. Biol Invasions 2014. [DOI: 10.1007/s10530-014-0726-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Mok HF, Stepien CC, Kaczmarek M, Albelo LR, Sequeira AS. Genetic status and timing of a weevil introduction to Santa Cruz Island, Galapagos. J Hered 2014; 105:365-80. [PMID: 24399746 PMCID: PMC3984438 DOI: 10.1093/jhered/est096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 10/16/2013] [Accepted: 12/03/2013] [Indexed: 11/14/2022] Open
Abstract
Successful invasive species can overcome or circumvent the potential genetic loss caused by an introduction bottleneck through a rapid population expansion and admixture from multiple introductions. We explore the genetic makeup and the timing of a species introduction to Santa Cruz Island in the Galápagos archipelago. We investigate the presence of processes that can maintain genetic diversity in populations of the broad-nosed weevil Galapaganus howdenae howdenae. Analyses of combined genotypes for 8 microsatellite loci showed evidence of past population size reductions through moment and likelihood-based estimators. No evidence of admixture through multiple introductions was found, but substantial current population sizes (N0 298, 95% credible limits 50-2300), genetic diversity comparable with long-established endemics (Mean number of alleles = 3.875), and lack of genetic structure across the introduced range (F ST = 0.01359) could suggest that foundations are in place for populations to rapidly recover any loss of genetic variability. The time estimates for the introduction into Santa Cruz support an accidental transfer during the colonization period (1832-1959) predating the spurt in human population growth. Our evaluation of the genetic status of G. h. howdenae suggests potential for population growth in addition to our field observations of a concurrent expansion in range and feeding preferences towards protected areas and endemic host plants.
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Affiliation(s)
- Hoi-Fei Mok
- the Department of Biological Sciences, Wellesley College, Wellesley
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