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Ascidian News #87 June 2021
ASCIDIAN NEWS* Gretchen Lambert 12001 11th Ave. NW, Seattle, WA 98177 206-365-3734 [email protected] home page: http://depts.washington.edu/ascidian/ Number 87 June 2021 Well, here we are still in this pandemic! I asked how you all are and again received many responses. A number are included in the next two sections. Nearly everyone still expresses confidence at having met the challenges and a great feeling of accomplishment even though tired of the whole thing; congratulations to you all! There are 117 new publications since December! Thanks to so many for the contributions and for letting me know how important AN continues to be. Please keep in touch and continue to send me contributions for the next issue. Keep safe, keep working, and good luck to everyone. *Ascidian News is not part of the scientific literature and should not be cited as such. NEWS AND VIEWS 1. From Hiroki Nishida ([email protected]) : In Japan, we are very slow to be vaccinated, but the labs are ordinarily opened and we can continue working. Number of patients are gradually increasing though and we are waiting for vaccines. I have to stay in my home and the lab. Postponement of 11th ITM (International Tunicate Meeting) This is an announcement about 11th ITM that had been planned to be held in July 2021 in Kobe, Japan. It is postponed by a year because of the global spread of COVID-19. We had an 11th ITM board meeting, and came to the conclusion that we had to reschedule it for July 2022 at the same venue (Konan University, Kobe, Japan) and similar dates (July 11 to 16). -
Ascidian-Associated Polychaetes
See discussions, stats, and author profiles for this publication at: http://www.researchgate.net/publication/267868444 Ascidian-associated polychaetes: ecological implications of aggregation size and tube- building chaetopterids on assemblage structure in the Southeastern Pacific Ocean ARTICLE in MARINE BIODIVERSITY · OCTOBER 2014 Impact Factor: 1.1 · DOI: 10.1007/s12526-014-0283-7 READS 80 5 AUTHORS, INCLUDING: Nicolas Rozbaczylo Christian M. Ibáñez Pontifical Catholic University of Chile Universidad Andrés Bello 63 PUBLICATIONS 373 CITATIONS 42 PUBLICATIONS 298 CITATIONS SEE PROFILE SEE PROFILE Marcelo A. Flores Juan M Cancino Universidad Andrés Bello Catholic University of the Most Holy Conce… 14 PUBLICATIONS 23 CITATIONS 46 PUBLICATIONS 742 CITATIONS SEE PROFILE SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Roger D. Sepúlveda letting you access and read them immediately. Retrieved on: 28 December 2015 Mar Biodiv DOI 10.1007/s12526-014-0283-7 ORIGINAL PAPER Ascidian-associated polychaetes: ecological implications of aggregation size and tube-building chaetopterids on assemblage structure in the Southeastern Pacific Ocean Roger D. Sepúlveda & Nicolás Rozbaczylo & Christian M. Ibáñez & Marcelo Flores & Juan M. Cancino Received: 13 May 2014 /Revised: 13 October 2014 /Accepted: 20 October 2014 # Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2014 Abstract Epifaunal polychaetes inhabit a range of habitat chaetopterid tubes influenced the -
1 Phylogeny of the Families Pyuridae and Styelidae (Stolidobranchiata
* Manuscript 1 Phylogeny of the families Pyuridae and Styelidae (Stolidobranchiata, Ascidiacea) 2 inferred from mitochondrial and nuclear DNA sequences 3 4 Pérez-Portela Ra, b, Bishop JDDb, Davis ARc, Turon Xd 5 6 a Eco-Ethology Research Unit, Instituto Superior de Psicologia Aplicada (ISPA), Rua 7 Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal 8 9 b Marine Biological Association of United Kingdom, The Laboratory Citadel Hill, PL1 10 2PB, Plymouth, UK, and School of Biological Sciences, University of Plymouth PL4 11 8AA, Plymouth, UK 12 13 c School of Biological Sciences, University of Wollongong, Wollongong NSW 2522 14 Australia 15 16 d Centre d’Estudis Avançats de Blanes (CSIC), Accés a la Cala St. Francesc 14, Blanes, 17 Girona, E-17300, Spain 18 19 Email addresses: 20 Bishop JDD: [email protected] 21 Davis AR: [email protected] 22 Turon X: [email protected] 23 24 Corresponding author: 25 Rocío Pérez-Portela 26 Eco-Ethology Research Unit, Instituto Superior de Psicologia Aplicada (ISPA), Rua 27 Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal 28 Phone: + 351 21 8811226 29 Fax: + 351 21 8860954 30 [email protected] 31 1 32 Abstract 33 34 The Order Stolidobranchiata comprises the families Pyuridae, Styelidae and Molgulidae. 35 Early molecular data was consistent with monophyly of the Stolidobranchiata and also 36 the Molgulidae. Internal phylogeny and relationships between Styelidae and Pyuridae 37 were inconclusive however. In order to clarify these points we used mitochondrial and 38 nuclear sequences from 31 species of Styelidae and 25 of Pyuridae. Phylogenetic trees 39 recovered the Pyuridae as a monophyletic clade, and their genera appeared as 40 monophyletic with the exception of Pyura. -
Time Or Space?
fmars-08-657411 April 16, 2021 Time: 17:33 # 1 ORIGINAL RESEARCH published: 22 April 2021 doi: 10.3389/fmars.2021.657411 Time or Space? Relative Importance of Geographic Distribution and Interannual Variation in Three Lineages of the Ascidian Pyura chilensis in the Southeast Pacific Coast Pilar A. Haye1,2, Xavier Turon3 and Nicolás I. Segovia1,2,4* 1 Departamento de Biología Marina, Facultad de Ciencias de Mar, Universidad Católica del Norte, Coquimbo, Chile, 2 Instituto Milenio en Socio-ecología Costera (SECOS), Santiago, Chile, 3 Centre for Advanced Studies of Blanes (CEAB, CSIC), Blanes, Spain, 4 Instituto de Ecología y Biodiversidad (IEB), Santiago, Chile Spatial and temporal variation of environmental parameters can affect dispersal, Edited by: recruitment and population persistence of marine benthic species. Studies including Sandie M. Degnan, The University of Queensland, inter-annual comparisons of genetic structure often indicate high/moderate temporal Australia heterogeneity in marine invertebrates, which may be a prevailing pattern. This Reviewed by: suggests that temporal studies are necessary to understand the dynamics of marine Pablo Saenz-Agudelo, metapopulations. In this study, we analyzed the spatio-temporal genetic structure of Austral University of Chile, Chile Carlos Vergara-Chen, the ascidian Pyura chilensis, a low dispersal sessile marine species endemic from the Technological University of Panama, Southeast Pacific coast and highly demanded for human consumption. We sequenced Panama S. López-Legentil, a fragment of the mitochondrial gene Cytochrome Oxidase I (COI) from 1,005 individuals University of North Carolina of six locations (30–40 individuals per site and year) spanning a wide latitudinal range at Wilmington, United States (24◦–42◦S) and sampled over 5 years (2012, 2014, 2015, 2016, and 2017). -
Novel Microsatellite Markers for Pyura Chilensis Reveal Fine-Scale Genetic Structure Along the Southern Coast of Chile
Mar Biodiv DOI 10.1007/s12526-017-0672-9 ORIGINAL PAPER Novel microsatellite markers for Pyura chilensis reveal fine-scale genetic structure along the southern coast of Chile E. C. Giles1 & C. Petersen-Zúñiga1 & S. Morales-González1 & S. Quesada-Calderón1 & Pablo Saenz-Agudelo1 Received: 25 August 2016 /Revised: 22 February 2017 /Accepted: 23 February 2017 # Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2017 Abstract Studying the geographic scale of gene flow and here, it seems possible that genetic structure at this spatial population structure in marine populations can be a powerful scale is driven to some extent by local population dynamics tool with which to infer patterns of larval dispersal averaged (deviations from random mating and/or a large proportion of across generations. Here, we describe the development of ten larvae settling in proximity of relatives), yet infrequent long- novel polymorphic microsatellite markers for an important distance dispersal events might also be responsible for the endemic ascidian, Pyura chilensis, of the southeastern relatively weak spatial heterogeneity between sites. Overall, Pacific, and we report the results from fine-scale genetic struc- our results both highlight the utility of this new marker set for ture analysis of 151 P. chilensis individuals sampled from five population genetic studies of this species and provide new sites constituting ∼80 km of coastline in southern Chile. All evidence regarding the complexity of the small-scale popula- microsatellite markers were highly polymorphic (number of tion structure of this species. alleles ranged from 12 to 36). Our results revealed significant deviations from Hardy–Weinberg equilibrium (HWE) for Keywords Population genetics . -
Sustainability of the Artisanal Fishery in Northern Chile: a Case Study of Caleta Pisagua
sustainability Article Sustainability of the Artisanal Fishery in Northern Chile: A Case Study of Caleta Pisagua Carola Espinoza 1,2,Víctor A. Gallardo 1, Carlos Merino 3, Pedro Pizarro 3 and Kwang-Ming Liu 1,4,5,* 1 Institute of Marine Affairs and Resource Management, National Taiwan Ocean University, 2, Pei-Ning Road, Keelung 20224, Taiwan; [email protected] (C.E.); [email protected] (V.A.G.) 2 Department of Oceanography, University of Concepción, Concepción 4030000, Chile 3 Faculty of Natural Renewables Resources, Arturo Prat University, Iquique 2210000, Chile; [email protected] (C.M.); [email protected] (P.P.) 4 George Chen Shark Research Center, National Taiwan Ocean University, 2, Pei-Ning Road, Keelung 20224, Taiwan 5 Center of Excellence for the Oceans, National Taiwan Ocean University, 2, Pei-Ning Road, Keelung 20224, Taiwan * Correspondence: [email protected]; Tel.: +886-2-2462-2192 (ext. 5018) Received: 14 August 2020; Accepted: 3 September 2020; Published: 5 September 2020 Abstract: The Humboldt Current, one of the most productive waters in the world, flows along the Chilean coast with high primary production level. However, living marine resources in these waters are declining due to overexploitation and other anthropogenic and environmental factors. It has been reported that deploying artificial reefs in coastal waters can improve the production of benthic resources. Toensure the sustainability of coastal fisheries in northern Chile this study aims to investigate fishermen’s perceptions on deploying artificial reefs and propose future management measures using Caleta Pisagua as a case study. Interviews of artisanal fishermen regarding four aspects: fishermen profile, fishing activity, resources, and artificial reefs were conducted. -
Ascidian News*
ASCIDIAN NEWS* Gretchen Lambert 12001 11th Ave. NW, Seattle, WA 98177 206-365-3734 [email protected] home page: http://depts.washington.edu/ascidian/ Number 79 June 2017 Rosana Rocha and I will be teaching the next tunicate workshop June 20-July 4 in Panama, at the Smithsonian’s Bocas del Toro Tropical Research Institute on the Caribbean. This is the 5th advanced workshop we have taught since 2006 at this lab; it is very gratifying to see that many of the participants are now faculty members at various institutions, with their own labs and students pursuing research projects on ascidians. A big thank-you to all who sent in contributions. There are 113 New Publications listed at the end of this issue. Please continue to send me articles, and your new papers, to be included in the next issue of AN. *Ascidian News is not part of the scientific literature and should not be cited as such. NEWS AND VIEWS 1. I hope to see many of you at the upcoming Intl. Tunicata meeting in New York City July 17-21, at New York University, hosted by Dr. Lionel Christiaen. There will be a welcome reception on the evening of July 16th. For more information see https://2017-tunicate- meeting.bio.nyu.edu/ . 2. The next International Summer Course will be held at Sugashima Marine Biological Laboratory, Toba, Mie Prefecture, Japan, from July 7 to July 14, 2017. This course deals with experiments and lectures on basic developmental biology of sea urchins and ascidians, basic taxonomy, and advanced course of experiments on genome editing and proteomics. -
Ascidian-Associated Polychaetes: Ecological Implications of Aggregation Size and Tube-Building Chaetopterids on Assemblage Structure in the Southeastern Pacific Ocean
Author's personal copy Mar Biodiv (2015) 45:733–741 DOI 10.1007/s12526-014-0283-7 ORIGINAL PAPER Ascidian-associated polychaetes: ecological implications of aggregation size and tube-building chaetopterids on assemblage structure in the Southeastern Pacific Ocean Roger D. Sepúlveda & Nicolás Rozbaczylo & Christian M. Ibáñez & Marcelo Flores & Juan M. Cancino Received: 13 May 2014 /Revised: 13 October 2014 /Accepted: 20 October 2014 /Published online: 4 November 2014 # Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2014 Abstract Epifaunal polychaetes inhabit a range of habitat chaetopterid tubes influenced the polychaete assemblage structures built by other organisms, such as ascidians. Here, structure, evidencing differences between morphotypes. We we examine: i) the polychaete fauna inhabiting aggregations suggest that both sample volume and the habitat structuring of the ascidian Pyura chilensis in central Chile; ii) the rela- capacity of the chaetopterid tubes change the habitat complex- tionship between sample volume (aggregation size) and poly- ity of the ascidian aggregations and, hence, produce differ- chaete assemblage variables; and iii) the effect of a tube- ences between morphotypes related to the polychaete assem- building chaetopterid on the polychaete assemblage structure. blage structure. The chaetopterid tube load on aggregations determines two ascidian morphotypes, those with a high load of chaetopterid Keywords Habitat complexity . Ecosystem engineering . tubes (HT morphotype) and those with a low load of Diversity . Tube-building . Ascidians chaetopterid tubes (LT morphotype). From a total of 38 ag- gregations studied, we found 5,524 specimens belonging to 35 species of polychaetes. Three species were the most abundant Introduction in the aggregations (Phyllochaetopterus socialis, Nicolea lobulata,andTyposyllis magdalena), reaching 22% of total Epifaunal polychaetes are an important component of hard abundance. -
Contrasting Patterns of Native and Introduced Ascidians in Subantarctic and Temperate Chile
Management of Biological Invasions (2016) Volume 7, Issue 1: 77–86 DOI: http://dx.doi.org/10.3391/mbi.2016.7.1.10 Open Access © 2016 The Author(s). Journal compilation © 2016 REABIC Proceedings of the 5th International Invasive Sea Squirt Conference (October 29–31, 2014, Woods Hole, USA) Research Article Too cold for invasions? Contrasting patterns of native and introduced ascidians in subantarctic and temperate Chile 1 2 3,4 5 6 Xavier Turon *, Juan I. Cañete , Javier Sellanes , Rosana M. Rocha and Susanna López-Legentil 1Center for Advanced Studies of Blanes (CEAB-CSIC), Accés Cala S. Francesc 14, 17300 Blanes, Girona, Spain 2Facultad de Ciencias, Universidad de Magallanes, Chile 3Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile 4Millenium Nucleus for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Chile 5Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, Brazil 6Dep. of Biology and Marine Biology, and Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC 28409, USA *Corresponding author E-mail: [email protected] Received: 6 May 2015 / Accepted: 30 September 2015 / Published online: 26 November 2015 Handling editor: Mary Carman Abstract We analysed the biodiversity of ascidians in two areas located in southern and northern Chile: Punta Arenas in the Strait of Magellan (53º latitude, subantarctic) and Coquimbo (29º latitude, temperate). The oceanographic features of the two zones are markedly different, with influence of the Humboldt Current in the north, and the Cape Horn Current System, together with freshwater influxes, in the Magellanic zone. Both regions were surveyed twice during 2013 by SCUBA diving and pulling ropes and aquaculture cages. -
Marine Ecosystem Engineering by the Alien Ascidian Pyura Praeputialis on a Mid-Intertidal Rocky Shore
MARINE ECOLOGY PROGRESS SERIES Vol. 268: 119–130, 2004 Published March 9 Mar Ecol Prog Ser Marine ecosystem engineering by the alien ascidian Pyura praeputialis on a mid-intertidal rocky shore Juan Carlos Castilla1,*, Nelson A. Lagos1, 2, Mauricio Cerda1 1Center For Advanced Studies in Ecology & Biodiversity (CASEB), Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile 2Present address: Escuela de Ciencias Básicas, Universidad Santo Tomás, Manuel Rodríguez 97, Santiago, Chile ABSTRACT: Engineer species transform ecosystems due to their own growth, constitute an integral part of altered environments, and provide new habitats for other species, thus affecting biodiversity and the ecosystem. On rocky shores inside Antofagasta Bay (Northern Chile), the alien ascidian Pyura praeputialis, an engineer species, creates broad belts and dense 3-dimensional matrices that modify the intertidal habitat structure. In all, 116 species of macro-invertebrates and algae inhabit this habitat, compared with the 66 species inhabiting adjacent intertidal rocky shores which lack P. praeputialis. Of the 145 species recorded at the seascape scale (encompassing both mid-intertidal habitat), 55% were found exclusively in intertidal P. praeputialis matrices. Along the coastal gradi- ent, patterns in β-diversity emerge due to the addition of a new set of species to the community inhab- iting the P. praeputialis matrices and, to a lesser extent, from spatial turnover. We found differences in the shape of the species frequency distribution between the communities inhabiting the engi- neered and non-engineered mid-intertidal habitats. However, within the same habitat type, there was no difference in the species frequency distribution between functional groups. -
The Peracarid Epifauna Associated with the Ascidian Pyura Chilensis (Molina, 1782) (Ascidiacea: Pyuridae)
J N H, 2003, 37, 13, 1555–1569 The peracarid epifauna associated with the ascidian Pyura chilensis (Molina, 1782) (Ascidiacea: Pyuridae) R. SEPU´ LVEDA†, J. M. CANCINO† and M. THIEL‡* †Facultad de Ciencias, Universidad Cato´lica de la Santı´sima Concepcio´n, Casilla 297, Concepcio´n, Chile ‡Facultad de Ciencias del Mar, Universidad Cato´lica del Norte, Larrondo 1281, Coquimbo, Chile (Accepted 21 September 2001) Epifaunal peracarids inhabit a variety of biogenic substrata, including ascidians. Herein we examined the peracarid fauna living on the tunica of the sublittoral ascidian Pyura chilensis growing in offshore and nearshore conditions in Bahı´a San Vicente, Chile. From a total of 38 samples we collected 17 species of Amphipoda, five Isopoda and two Tanaidacea. The similarity between the sites was high (73.8%, Sorensen’s index). Species diversity (H∞) was 2.8 and 2.6, evenness (J) was 0.7 and 0.6 at the offshore and nearshore site, respectively. Both species and individual number increased significantly with the size (volume) of the ascidian samples, and these relationships did not differ between the sites. Many species, in particular the most abundant ones, occurred at both sites, but some species were restricted either to the offshore (three species) or to the nearshore site (seven species). Amphipods and tanaids were the most abundant taxa at both sites. The peracarid fauna at both sites was dominated by suspension- feeding peracarids (>80% of the individuals), which utilize the ascidians primarily as shelter, feeding on allochthonous material, i.e. not originating from the ascid- ians. It is suggested that the high percentage of suspension-feeding species among the epifaunal peracarids is due to the fact that ascidians settle and grow at sites that provide optimal feeding conditions for these organisms. -
Ascidian Fauna (Tunicata, Ascidiacea) of Subantarctic and Temperate Regions of Chile
Ascidian fauna (Tunicata, Ascidiacea) of subantarctic and temperate regions of Chile Running title: Ascidian fauna of Chile Xavier Turon1*, Juan I. Cañete2, Javier Sellanes3,4, Rosana M. Rocha5, Susanna López-Legentil6 1Center for Advanced Studies of Blanes (CEAB-CSIC), Blanes, Girona, Spain 2Facultad de Ciencias, Universidad de Magallanes, Punta Arenas, Chile 3Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile 4Millenium Nucleus for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Chile 5Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, Brazil 6Department of Biology and Marine Biology, and Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, USA ABSTRACT We studied the ascidian fauna from two zones located in subantarctic (Punta Arenas, latitude 53º) and temperate Chile (Coquimbo, latitude 29º). The different oceanographic features of the two zones, with influence of the Humboldt Current in the north and the Cape Horn Current System and freshwater inputs in the south, led to markedly different ascidian faunas. A total of 22 species were recorded, with no shared species across the two areas (11 species each). The new species Polyzoa iosune is described, Lissoclinum perforatum is found for the first time in the Pacific Ocean, and Synoicum georgianum and Polyzoa minor are new to the Chilean fauna. The populations of Ciona in the Coquimbo area (formerly attributed to Ciona intestinalis) correspond to the species Ciona robusta. A total of 35 Cytochrome oxidase (COI) sequences of the standard barcode region have been obtained for 17 of the 22 species reported. INTRODUCTION The Chilean coasts provide a unique scenario for biodiversity studies, as it spans a wide range of latitude (ca.