DOCSLIB.ORG

Distribution, Habitat and Population Densities of the Invasive Species Pinctada Radiata (Molluca: Bivalvia) Along the Northern and Eastern Coasts of Tunisia

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Distribution, Habitat and Population Densities of the Invasive Species Pinctada Radiata (Molluca: Bivalvia) Along the Northern and Eastern Coasts of Tunisia See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/286280734 Distribution, habitat and population densities of the invasive species Pinctada radiata (Molluca: Bivalvia) along the Northern and Eastern coasts of Tunisia Article in Cahiers de Biologie Marine · January 2009 CITATIONS READS 22 131 4 authors, including: Sabiha Tlig-Zouari Oum Kalthoum Ben Hassine University of Tunis El Manar University of Tunis El Manar 74 PUBLICATIONS 738 CITATIONS 287 PUBLICATIONS 1,940 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Congress participation View project Naturalists View project All content following this page was uploaded by Oum Kalthoum Ben Hassine on 16 November 2016. The user has requested enhancement of the downloaded file. Cah. Biol. Mar. (2009) 50 : 131-142 Distribution, habitat and population densities of the invasive species Pinctada radiata (Molluca: Bivalvia) along the Northern and Eastern coasts of Tunisia Sabiha TLIG-ZOUARI, Lotfi RABAOUI, Ikram IRATHNI and Oum Kalthoum BEN HASSINE Unité de recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques. Campus Universitaire, Université Tunis El Manar, Faculté des Sciences de Tunis, Département de Biologie, 2092 Tunis - TUNISIE. Tel / Fax: (00216) 71881939, Mobile: (00216) 98 234 355. E-mail: [email protected] Abstract: The pearl oyster Pinctada radiata (Leach, 1814) is an alien species introduced to the Mediterranean Sea and recorded in Tunisia many years ago. However, since its record in Tunisian inshore areas, no studies have been carried out about the spread of this invasive mollusc. Thus, the status of this species is still poorly known and there is a knowledge- gap about its distribution and ecology. The present work is a contribution to the knowledge of the pearl oyster distribution and density of individuals along the northern and eastern Tunisian coasts, at depths situated between 0 and 6 metres. A large part of Tunisian coast was surveyed, stressing some observations concerning the species ecology and its preferred biotopes. The size structure of the five densest populations was also described. Pinctada radiata has not yet reached the northern coasts (Tabarka and Bizerta coasts). Density of individuals varied from one locality to another between 0 and 62.67 ± 6.11 individuals m-2. This mollusc prefers to be attached to vertical solid substrata (natural or artificial) within marine habitats with relatively high hydrodynamic conditions. Confined localities such as those inside lagoons seem not to be the preferred habitat for the proliferation of this immigrant species. Size structure analysis showed that the majority of the five examined populations, except for Tunis north lagoon and La Marsa, were dominated by large individuals exceeding 42 mm in shell height. It is worth noting that the maximum size (100.5 mm) recorded in the lagoon of Bizerta (Njila) is higher than that recorded in previous studies, in particular in its origin habitat (Red Sea). This suggests that Pinctada radiata is well adapt- ed to Tunisian coasts. Résumé : Distribution, habitat et densité des populations de l’espèce invasive Pinctada radiata (Mollusca : Bivalvia) le long des côtes septentrionales et orientales de Tunisie. L’huître perlière Pinctada radiata (Leach, 1814) est l’une des espèces exotiques de la Méditerranée. Elle a été signalée en Tunisie depuis plusieurs années. Toutefois, depuis son signalement sur les côtes tunisiennes, aucune étude n’a été menée sur ce mollusque invasif. Ainsi, le statut de cette espèce est encore mal connu et il existe un déficit de connaissances sur sa distribution et son écologie. Le présent travail est une contribution à la connaissance de la distribution de l’huître perlière et la détermination de sa densité le long des côtes nord et est de la Tunisie, à des profondeurs allant de 0 à 6 mètres. Une vaste partie de la côte tunisienne a été prospectée, en effectuant des observations sur l’écologie et les biotopes préférés par cette espèce. La structure en taille des cinq plus denses populations a également été décrite. Pinctada radiata ne semble pas encore franchir les côtes nord (les côtes de Tabarka et Bizerte). Sa densité varie d’une localité à une autre entre 0 et 62,67 ± 6,11 individus m-2. En outre, il semble que ce mollusque préfère être attaché à des substrats solides verticaux (naturels ou artificiels) dans des habitats soumis à des Reçu le 7 octobre2008 ; accepté après révision le 31 mars 2009. Received 7 October 2008; accepted in revised form 31 March 2009. 132 THE INVASIVE PEARL OySTER PINCTADA rADIATA AlONG TUNISIAN COASTS conditions hydrodynamiques relativement fortes. Les milieux confinés (localités intra-lagunaires) ne semblent pas être des habitats de prédilection pour la prolifération de cette espèce exotique. La majorité des cinq populations examinées, à l’ex- ception de la lagune nord de Tunis et de La Marsa, est dominée par de grands individus dont la coquille dépasse la hauteur de 42 mm. Il est à noter que la taille maximale (100,5 mm), enregistrée dans la lagune de Bizerte (Njila) est plus élevée que celle mentionnée dans des travaux antérieures, en particulier au niveau de son habitat d’origine (mer Rouge). Cela conduit à déduire que Pinctada radiata est bien adaptée sur les côtes tunisiennes. Keywords: Pinctada radiata l Invasive species l Bivalve l Distribution l Density l Mediterranean Sea l Habitat. Introduction Isles complex and in Kriti (Zenetos et al., 2007). Pinctada radiata was also intentionally imported for mariculture in The colonization of marine ecosystems by newly many areas of Greece and Italy during the last century. Up introduced species is a phenomenon that has begun to be to date, it has been recorded as common in the eastern more amplified, during the last decades. It seems to be Mediterranean with sporadic occurrences in the western favoured by various anthropogenic activities and the basin (Zenetos et al., 2003). Besides its adaptation to the current global warming (Quignard, 1994; Astraldi et al., subtropical environment of the south-eastern 1995). It has been stated that this phenomenon contributes Mediterranean, its tolerance to chemical contamination has to changing faunistic and floristic composition of the enhanced its expansion in enclosed polluted ecosystems colonized ecosystems and can then affect their ecological (Zenetos et al., 2007). equilibrium (Wolfe, 2002; Torchin et al. 2003). Introduced In Tunisia, the first records of Pinctada radiata was species are common in the marine environment because made by Bouchon-Brandely & Berthoule (1891) and Vassel organisms are easily transported via shipping routes and (1897), in the Gulf of Gabes (southern coast), where it had introduced unintentionally through aquaculture (Carlton, been confined and proliferated forming very dense 1996). In the Mediterranean Sea, biotopic colonization by populations (Zouari, 1985). In fact, outside the Gulf of exotic species has progressed and increased since 1970 Gabes, the presence of this bivalve is very sporadic along (Gofas & Zenetos, 2003). Thus, various exotic molluscan the eastern Tunisian coastline (Ktari-Chakroun & Azzouz, species have been recorded in different areas (Galil & 1971; Zouari, 1985; Tlig-Zouari, 1993). Research on Zenetos, 2002; Gofas & Zenetos, 2003; Zenetos et al., Pinctada radiata is very sparse and has been limited to the 2003). The Mediterranean Sea currently houses approxi- study of Kerkennah island populations (Tlig-Zouari, 1993). mately 139 exotic molluscs; among them ten species are Apart from some recent records in the inventories of locally invasive (Gofas & Zenetos, 2003; Zenetos et al., benthic macro-invertebrate communities (Diawara et al., 2005). The pearl oyster Pinctada radiata (Leach, 1814) 2008), no study has targeted the current distribution of this was among the first invasive immigrants that arrived to the species along the Tunisian coast and the density of its Mediterranean through the Suez Channel (Monterosato, populations in the habitats recently colonized. The study of 1878). Pinctada radiata is an epifaunal suspension feeder Pinctada radiata in Tunisia seems then to be important. of the subtidal zone and a fouling species, living attached The present study focuses on pearl oyster distribution on by its byssus to hard substrata. Usually it attains a length of the northern and eastern coasts of Tunisia, on the 50-65 mm, but may exceed 100 mm in length. It is a characteristics of colonized habitats, and on the protandric hermaphrodite species with sex inversion demographic structure of its populations. occurring in shells of 32-57 mm length. Gonad maturity is controlled by temperature (Tlig-Zouari & Zaouali, 1994). Material and Methods This indo-pacific bivalve has successfully spread through- out the Mediterranean colonizing continually new habitats In the present study, systematic surveys were carried out in the eastern basin (Tlig-Zouari & Zaouali, 1994 & 1998; along the coastal region from Tabarka to Monastir. Galil & Zenetos, 2002; Gofas & Zenetos, 2003; Zenetos et Observations were made during spring 2005 (March and al., 2005) and also in the Adriatic (Vio & De Min, 1996) April 2005) at 31 stations belonging to six sectors from the and Croatia (Doğan & Nerlović, 2008). Recently, it was northern and eastern Tunisian coastline (Fig. 1 & Table 1). recorded in newly invaded Hellenic sites, e.g. the Kyklades A total of 50 surveys were conducted by SCUBA diving, S. TLIG-ZOUARI, L. RABAOUI, I. IRATHNI, O.K. BEN HASSINE 133 Figure 1. Pinctada radiata. Study area sampling stations. 1. Ancient Tabarka harbour. 2. Tabarka El Corniche beach. 3. Tabarka Island. 4. Negro Cape. 5. Sidi Mechreg. 6. Serrat Cape. 7. Enjlaa Cape. 8. Blanc Cape. 9. Bizerta El Corniche beach. 10. Sidi Salem beach. 11. Rimel beach. 12. Bizerta channel. 13. Carrier Bay. 14. Njila. 15. Menzel Jemil. 16. Ghar Elmelh Lagoon. 17. Kalaat Landalous beach. 18. La Marsa beach. 19. The entrance lock of Tunis north lagoon-Kheireddine side. 20. Entrance lock of Tunis north lagoon-lagoon side.
Load more

Recommended publications
  • Rapid Cultural Inventories of Wetlands in Arab States Including Ramsar Sites and World Heritage Properties
    Rapid cultural inventories of wetlands in Arab states including Ramsar Sites and World Heritage Properties Building greater understanding of cultural values and practices as a contribution to conservation success Tarek Abulhawa – Lead Author Tricia Cummings – Research and Data Analysis Supported by: May 2017 Acknowledgements The report team expresses their utmost appreciation to Ms. Mariam Ali from the Ramsar Secretariat and Ms. Haifaa Abdulhalim from the Tabe’a Programme (IUCN’s programme in partnership with ARC-WH) for their guidance and support on the preparation of this regional assessment. Special gratitude is extended to all the national focal points from the target countries and sites as well as international experts and colleagues from the Ramsar and IUCN networks for their valuable contributions and reviews of assignment reports drafts. Finally, the team wants to take the opportunity to thank all the peoples of the wetlands in the Arab states for their long established commitment to the protection of their wetlands through their cultural values, traditional knowledge and sustainable practices for the benefit of future generations. Cover: Traditional felucca fishing boat, Tunisia. DGF Tunisa Contents Executive summary . 4 Introduction . 9 Methodology . 13 Assessment Results . 21 Algeria . 23 La Vallée d’Iherir . 24 Oasis de Tamantit et Sid Ahmed Timmi. 27 Réserve Intégrale du Lac Tonga . 32 Egypt . 35 Lake Bardawil . 36 Lake Burullus . 41 Wadi El Rayan Protected Area . 44 Iraq . 49 Central Marshes . 52 Hammar Marshes . 55 Hawizeh Marshes . 58 Mauritania . 63 Lac Gabou et le réseau hydrographique du Plateau du Tagant . 64 Parc National du Banc d’Arguin . 67 Parc National du Diawling .
    [Show full text]
  • Tunisia Elections Dispatch No. 3 Pre-Elections Period
    Tunisia Elections Dispatch No. 3 Pre-Elections Period Introduction This is the third in a series of reports the International Republican Institute (IRI) is issuing over the course of the next few months as Tunisia holds parliamentary and presidential elections. The parliamentary elections will be held Sunday, October 26, 2014, while the presidential elections are scheduled for November 23 with a potential run-off occurring before the end of 2014. This report is a follow-up to IRI’s Tunisia Elections Dispatch No. 2 and Tunisia Elections Dispatch No. 1 and draws on the observation and analysis of IRI’s long-term observers deployed at strategic locations throughout Tunisia. IRI’s long-term observation mission is based in Bizerte, Mahdia, Medenine, Tozeur and Tunis, but has provided coverage of 20 of Tunisia’s 24 governorates. The long-term observer (LTO) delegation includes representation from Egypt, France, Italy, Jordan, Morocco, Portugal and Togo and has been active since September 1, 2014. IRI also deployed an LTO to witness the voter registration period in July and August of this year. To support the elections, IRI will conduct international election observation missions for both the parliamentary and presidential elections, deploying long-term and short-term observers throughout the country to monitor the pre- and post-elections processes, assess the transparency and credibility of the process, and, afterward, offer analysis and recommendations for future electoral cycles. Per Tunisia’s new constitution, the elections are being administered by the Independent High Authority for Elections (ISIE), which is a permanent independent public authority responsible for ensuring democratic, free, pluralistic, fair and transparent elections.
    [Show full text]
  • Policy Notes for the Trump Notes Administration the Washington Institute for Near East Policy ■ 2018 ■ Pn55
    TRANSITION 2017 POLICYPOLICY NOTES FOR THE TRUMP NOTES ADMINISTRATION THE WASHINGTON INSTITUTE FOR NEAR EAST POLICY ■ 2018 ■ PN55 TUNISIAN FOREIGN FIGHTERS IN IRAQ AND SYRIA AARON Y. ZELIN Tunisia should really open its embassy in Raqqa, not Damascus. That’s where its people are. —ABU KHALED, AN ISLAMIC STATE SPY1 THE PAST FEW YEARS have seen rising interest in foreign fighting as a general phenomenon and in fighters joining jihadist groups in particular. Tunisians figure disproportionately among the foreign jihadist cohort, yet their ubiquity is somewhat confounding. Why Tunisians? This study aims to bring clarity to this question by examining Tunisia’s foreign fighter networks mobilized to Syria and Iraq since 2011, when insurgencies shook those two countries amid the broader Arab Spring uprisings. ©2018 THE WASHINGTON INSTITUTE FOR NEAR EAST POLICY. ALL RIGHTS RESERVED. THE WASHINGTON INSTITUTE FOR NEAR EAST POLICY ■ NO. 30 ■ JANUARY 2017 AARON Y. ZELIN Along with seeking to determine what motivated Evolution of Tunisian Participation these individuals, it endeavors to reconcile estimated in the Iraq Jihad numbers of Tunisians who actually traveled, who were killed in theater, and who returned home. The find- Although the involvement of Tunisians in foreign jihad ings are based on a wide range of sources in multiple campaigns predates the 2003 Iraq war, that conflict languages as well as data sets created by the author inspired a new generation of recruits whose effects since 2011. Another way of framing the discussion will lasted into the aftermath of the Tunisian revolution. center on Tunisians who participated in the jihad fol- These individuals fought in groups such as Abu Musab lowing the 2003 U.S.
    [Show full text]
  • WP4 – Ecosystem Modelling Workshop Ecopath with Ecosim
    WP4 – Ecosystem modelling workshop Ecopath with Ecosim EwE 1_AUTH_Morocco Donna Dimarchopoulou This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 727277 odysseaplatform.eu |@odysseaplatform ODYSSEA OBSERVATORIES Morocco odysseaplatform.eu | @ODYSSEAPlatform 2 MARINE PROTECTED AREA of the NATIONAL PARK Al-Hoceima Total park area: 480 km2 Coastline: 40 km Marine area: 196 km2 Good water quality one of the cleanest parts of the entire Med Moroccan coast: very rich in species biodiversity The fish fauna is particularly rich and includes both Mediterranean and Atlantic species coming in through the nearby Strait of Gibraltar (Nibani 2010). odysseaplatform.eu | @ODYSSEAPlatform 3 MARINE PROTECTED AREA of the NATIONAL PARK Al-Hoceima Giant limpet Patella ferruginea Short-beaked common dolphin Delphinus delphis Medit. monk seal Monachus monachus Striped dolphin Stenella coeruleoalba Bottlenose dolphin Tursiops truncatus odysseaplatform.eu | @ODYSSEAPlatform 4 MARINE PROTECTED AREA of the NATIONAL PARK Al-Hoceima Purse seining Scuba spear-fishing Trawling: 14 vessels 2200 t/year Dynamite fishing: 10-15 individuals 367 t/year Small-scale commercial/subsistence fishing: ~ 3650 fishermen, 1500 t/year (Nibani 2010) Copper sulphate fishing for octopus: ≥ 15 local fishermen Fishing is the second important activity of the coastal population being for a long time oriented to the sea (after agriculture). odysseaplatform.eu | @ODYSSEAPlatform 5 GFCM Mediterranean Geographical Sub-Areas (GSAs) Morocco GSA 1: Northern Alboran Sea 33156 km2 GSA 2: Alboran Island 2229 km2 GSA 3: Southern Alboran Sea 22588 km2 odysseaplatform.eu | @ODYSSEAPlatform 6 Alternative No. 1 Alternative No. 2 ECOPATH Southern Alboran Sea 22588 km2 Entire Alboran Sea 57973 km2 http://sirs.agrocampus-ouest.fr/EcoBase/index.php odysseaplatform.eu | @ODYSSEAPlatform 7 DATA FOR MEDITERRANEAN MOROCCO ≥ 60 fish and invertebrate species landed 25-30000 t/year Species (ASFIS species) Scientific name 2014-2016 (t/year) 1.
    [Show full text]
  • I) Sewage Disposal, Lake Bizerte and (II) Sewage Disposal, 6 + 2 Locations in the Medjerda Valley (Phase II
    Tunisia: (I) Sewage disposal, Lake Bizerte and (II) Sewage disposal, 6 + 2 locations in the Medjerda valley (Phase II) Ex post evaluation report OECD sector 1402000 / Sewage disposal BMZ project ID I 199365644 – Sewage disposal (SD), Lake Bizerte II 199166075 – SD at 6 + 2 locations in the Medjerda valley (Ph. II) Project executing agency OFFICE NATIONAL DE L’ASSAINISSEMENT (ONAS) Consultant GKW/Pöyry Year of 2009 ex post evaluation report 2009 (2009 random sample) Project appraisal Ex post evaluation (planned) (actual) Start of implementation I Q3 1994 I Q2 1995 II Q3 1993 II Q3 1994 Period of implementation I 40 months I 133 months II 52 months II 116 months Investment costs I EUR 33.3 million I EUR 29.4 million II EUR 78.9 million II EUR 53.4 million Counterpart contribution I EUR 13.3 million I EUR 13.6 million II EUR 25.0 million II EUR 21.6 million Financing, of which Financial I FC/G: EUR 20.0 million I FC/G: EUR 15.8 million Cooperation (FC) funds II FC/L: EUR 37.9 million II FC/G: EUR 31.8 million Other institutions/donors involved I + II Project executing I + II Project executing agency agency Performance rating I: 3 II: 3 • Relevance I: 2 II: 2 • Effectiveness I: 3 II: 3 • Efficiency I: 3 II: 3 • Overarching developmental impact I: 2 II: 2 • Sustainability I: 3 II: 3 Brief description, overall objective and project objectives with indicators I: This project comprised the initial expansion of the sewage treatment plant (STP) west of Bizerte and the expansion and repair of the sewage collection systems in Bizerte, in Zarzouna (a suburb of Bizerte), and in the towns of Menzel Jemil and Menzel Abderrahman (in the Greater Bizerte area), the aim being to dispose of domestic sewage and commercial effluent in an environmentally sound manner (the project objective).
    [Show full text]
  • Morphological Variations of the Shell of the Bivalve Lucina Pectinata
    I S S N 2 3 47-6 8 9 3 Volume 10 Number2 Journal of Advances in Biology Morphological variations of the shell of the bivalve Lucina pectinata (Gmelin, 1791) Emma MODESTIN PhD of Biogeography, zoology and Ecology University of the French Antilles, UMR AREA DEV ABSTRACT In Martinique, the species Lucina pectinata (Gmelin, 1791) is called "mud clam, white clam or mangrove clam" by bivalve fishermen depending on the harvesting environment. Indeed, the individuals collected have differences as regards the shape and colour of the shell. The hypothesis is that the shape of the shell of L. pectinata (P. pectinatus) shows significant variations from one population to another. This paper intends to verify this hypothesis by means of a simple morphometric study. The comparison of the shape of the shell of individuals from different populations was done based on samples taken at four different sites. The standard measurements (length (L), width or thickness (E - épaisseur) and height (H)) were taken and the morphometric indices (L/H; L/E; E/H) were established. These indices of shape differ significantly among the various populations. This intraspecific polymorphism of the shape of the shell of P. pectinatus could be related to the nature of the sediment (granulometry, density, hardness) and/or the predation. The shells are significantly more elongated in a loose muddy sediment than in a hard muddy sediment or one rich in clay. They are significantly more convex in brackish environments and this is probably due to the presence of more specialised predators or of more muddy sediments. Keywords Lucina pectinata, bivalve, polymorphism of shape of shell, ecology, mangrove swamp, French Antilles.
    [Show full text]
  • Durant Les Voyages D'etudes En Tunisie
    Références d’Entreprises Visitées, lieux d’hébergement, et transporteurs DURANT LES VOYAGES D'ETUDES EN TUNISIE TYPE ORGANISME ADRESSE TEL FAX INTERLOCUTEUR Mme BEN MUSTAPHA97 418 111 STEG : Direction de la Coopération 71 341 311 Poste :JEMAÄ Wissem 4112 et 4346 STEG : Radès DEX---------------------------------- Tunis Rue Kamel Atatürk 71 433 977 STEG : Gaz BORMA------------------------------ 75 642 882 HAZAMI Mohamed Ali Ch. Station Adj STEG : Bir Mchergua 75 642 970 MEKKI Slama Che de station Gaz Borma 73 252 723 Parc Animalier FRIGUIA Sousse 73 252 715 73 380 522 78 454 122 ADMIN Gouvernorat Béja Béja 78 455 455 78 454 449 ADMIN Gouvernorat Bizerte Bizerte 72 431 535 72 444 700 ADMIN Gouvernorat Gabès Gabès 75 270 300 75 270 335 ADMIN Gouvernorat Gafsa Gafsa 76 228 880 76 220 079 ADMIN Gouvernorat Jendouba Jendouba 78 601 200 78 605 715 Gouvernorat Kairouan ADMIN Kairouan 77 226 777 77 234 848 77 473 730 77 473 800 Gouvernorat Kasserine ADMIN Kasserine 77 474 622 Délégation Kasserine Sud 77 474 770 77 473 627 Délégué: MAGHERBI Brahim (ADENIT) ADMIN Gouvernorat Kébili Kébili 75 490 121 75 490 995 ADMIN Gouvernorat Kef Kef 78 201 200 78 202 385 معتمد شؤون اقتصادية ADMIN Gouvernorat Mahdia Mahdia 73 681 388 73 681 600 Mme TRIKI ADMIN Gouvernorat Mednine Mednine 75 640 018 75 701 570 1 73 431 433 ADMIN Gouvernorat Monastir Monastir 73 464 600 73 461 433 ADMIN Gouvernorat Nabeul Nabeul 72 285 555 72 223 765 ADMIN Gouvernorat Séliana Séliana 78 871 833 78 871 294 Gouvernorat Sfax 74 400 150 ADMIN Sfax Maharès 74 403 625 Délégation Maharès
    [Show full text]
  • Os Nomes Galegos Dos Moluscos
    A Chave Os nomes galegos dos moluscos 2017 Citación recomendada / Recommended citation: A Chave (2017): Nomes galegos dos moluscos recomendados pola Chave. http://www.achave.gal/wp-content/uploads/achave_osnomesgalegosdos_moluscos.pdf 1 Notas introdutorias O que contén este documento Neste documento fornécense denominacións para as especies de moluscos galegos (e) ou europeos, e tamén para algunhas das especies exóticas máis coñecidas (xeralmente no ámbito divulgativo, por causa do seu interese científico ou económico, ou por seren moi comúns noutras áreas xeográficas). En total, achéganse nomes galegos para 534 especies de moluscos. A estrutura En primeiro lugar preséntase unha clasificación taxonómica que considera as clases, ordes, superfamilias e familias de moluscos. Aquí apúntase, de maneira xeral, os nomes dos moluscos que hai en cada familia. A seguir vén o corpo do documento, onde se indica, especie por especie, alén do nome científico, os nomes galegos e ingleses de cada molusco (nalgún caso, tamén, o nome xenérico para un grupo deles). Ao final inclúese unha listaxe de referencias bibliográficas que foron utilizadas para a elaboración do presente documento. Nalgunhas desas referencias recolléronse ou propuxéronse nomes galegos para os moluscos, quer xenéricos quer específicos. Outras referencias achegan nomes para os moluscos noutras linguas, que tamén foron tidos en conta. Alén diso, inclúense algunhas fontes básicas a respecto da metodoloxía e dos criterios terminolóxicos empregados. 2 Tratamento terminolóxico De modo moi resumido, traballouse nas seguintes liñas e cos seguintes criterios: En primeiro lugar, aprofundouse no acervo lingüístico galego. A respecto dos nomes dos moluscos, a lingua galega é riquísima e dispomos dunha chea de nomes, tanto específicos (que designan un único animal) como xenéricos (que designan varios animais parecidos).
    [Show full text]
  • Marine Snails of the Genus Phorcus: Biology and Ecology of Sentinel Species for Human Impacts on the Rocky Shores
    DOI: 10.5772/intechopen.71614 Provisional chapter Chapter 7 Marine Snails of the Genus Phorcus: Biology and MarineEcology Snails of Sentinel of the Species Genus Phorcusfor Human: Biology Impacts and on the EcologyRocky Shores of Sentinel Species for Human Impacts on the Rocky Shores Ricardo Sousa, João Delgado, José A. González, Mafalda Freitas and Paulo Henriques Ricardo Sousa, João Delgado, José A. González, MafaldaAdditional information Freitas and is available Paulo at Henriques the end of the chapter Additional information is available at the end of the chapter http://dx.doi.org/10.5772/intechopen.71614 Abstract In this review article, the authors explore a broad spectrum of subjects associated to marine snails of the genus Phorcus Risso, 1826, namely, distribution, habitat, behaviour and life history traits, and the consequences of anthropological impacts, such as fisheries, pollution, and climate changes, on these species. This work focuses on discussing the ecological importance of these sentinel species and their interactions in the rocky shores as well as the anthropogenic impacts to which they are subjected. One of the main anthro- pogenic stresses that affect Phorcus species is fisheries. Topshell harvesting is recognized as occurring since prehistoric times and has evolved through time from a subsistence to commercial exploitation level. However, there is a gap of information concerning these species that hinders stock assessment and management required for sustainable exploi- tation. Additionally, these keystone species are useful tools in assessing coastal habitat quality, due to their eco-biological features. Contamination of these species with heavy metals carries serious risk for animal and human health due to their potential of biomag- nification in the food chain.
    [Show full text]
  • Estudio Cariológico En Moluscos Bivalvos
    UNIVERSIDAD DE LA CORUÑA DEPARTAMENTO DE BIOLOGIA CELULAR Y MOLECULAR AREA DE GENETICA ESTUDIO CARIOLOGICO EN MOLUSCOS BIVALVOS MEMORIA que para optar al grado de Doctora presenta ANA MARIA INSUA POMBO La Coruña, Diciembre de 1992 N UNIVERSIDAD DE LA CORUNA DEPARTAMENTO DE BIOLOGIA CELULAR Y MOLECULAR AREA DE GENETICA ESTUDIO CARIOLOGICO EN MOLUSCOS BIVALVOS MEMORIA que para optar al grado de Doctora presenta ANA MARIA INSUA POMBO La Coruña, Diciembre de 1992 JOSEFINA MENDEZ FELPETO, PROFESORA TITULAR DE GENETICA DE LA UNIVERSIDAD DE LA CORUÑA, Y CATHERINE THIRIOT-QUIEVREUX, DIRECTORA DE INVESTIGACION EN EL CENTRE NATIONAL DE RECHERCHE SCIENTIFIQUE (FRANCIA), INFORMAN: Que el presente trabajo, ESTUDIO CARIOLOGICO EN MOLUSCOS BIVALVOS, que para optar al Grado de Doctora presenta De Ana María Insua Pombo, ha sido realizado bajo nuestra dirección y, considerándolo concluido, autorizamos su presentación al tribunal calificador. Villefranche-sur-Mer, a 7 de diciembre de 1992 La Coruña, a 9 de diciembre de 1992 c^_ Fdo. Catherine Thiriot-Quiévreux Fdo. Josefina Méndez Felpeto A Suso, Mano/a, G/oria e Leonor AGRADECIMIENTOS Este trabajo representa para mi un acúmulo de experiencias profesionales y personales que en gran medida transformaron mi vida de estos últimos años. Ahora ha Ilegado a su fin, pero esto no hubiese sido posible sin la ayuda, la colaboración y el aliento con el que he contado en el transcurso de su desarrollo. Por ello, deseo expresar mi más sincero agradecimiento a todas las personas que de una u otra manera contribuyeron a su realización. Josefina Méndez Felpeto se preocupó constantemente por mi formación investigadora desde el año 1986 en que me incorporó a su equipo y dirigió este trabajo con gran interés, respetando y apoyando en todo momento mis iniciativas.
    [Show full text]
  • View / Download 3.3 Mb
    Shadow Zones: Contraband and Social Contract in the Borderlands of Tunisia by Alyssa Marie Miller Department of Cultural Anthropology Duke University Date:_______________________ Approved: ___________________________ Anne Allison, Supervisor ___________________________ Kamran Ali ___________________________ Engseng Ho ___________________________ Laurie McIntosh ___________________________ Ellen McLarney ___________________________ Harris Solomon Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Cultural Anthropology in the Graduate School of Duke University 2018 i v ABSTRACT Shadow Zones: Contraband and Social Contract in the Borderlands of Tunisia by Alyssa Marie Miller Department of Cultural Anthropology Duke University Date:_______________________ Approved: ___________________________ Anne Allison, Supervisor ___________________________ Kamran Ali ___________________________ Engseng Ho ___________________________ Laurie McIntosh ___________________________ Ellen McLarney ___________________________ Harris Solomon An abstract of a dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Cultural Anthropology in the Graduate School of Duke University 2018 Copyright by Alyssa Miller 2018 Abstract Although Tunisia has been celebrated as the unique success story of the Arab Spring, its emergent democracy has failed to resolve the structural inequalities that caused the 2011 revolution, or meaningfully
    [Show full text]
  • Zurück in Teboulba
    Zurück in Teboulba Die zweite Reise zu den tunesischen Fischern Oktober 2010 EineEine Aktion Aktion des des Komitees Komitees SOS SOS Mittelmeer Mittelmeer – – Lebensretter Lebensretter inin NotNot 1 Zurück in Teboulba Euro) im Monat und können die Familie da- von kaum unterstützen. Das Komitee SOS Mittelmeer, das sich 2010 gründete, hat erneut Spenden sammeln Amine Bayoudh, Sohn des verurteilten Kapi- können, um diese zu den tunesischen täns, hat vor drei Jahren eine Ausbildung ab- Fischern nach Teboulba zu bringen. geschlossen. Er ist kein Fischer und war nur Vom 12.-16.10. waren Judith Gleitze und als Ersatzmann an jenem Tage an Bord. Seit Frank Jugert vor Ort, haben mit den Fischern seinem Aufenthalt in Berlin zur Verleihung der gesprochen und ihnen diese zweite Carl-von-Ossietzky Medaille im Dezember Spendensumme übergeben. Die Fischer 2009 lernt er Deutsch an einer Sprachschule richten über uns die herzlichsten Grüße und in Ksar Hellal. Er hat sich im ganzen Land be- Dank an die Unterstützer_innen in worben, findet aber keine Arbeit. Er macht Deutschland aus. sich große Sorgen, dass immer mehr Zeit nach Abschluss seiner Ausbildung ins Land Die derzeitige Situation der sieben Fischer geht und er nicht mehr auf dem neuesten Im November 2009 waren die beiden Kapitä- Stand bleiben kann. Amine hat versucht, über ne Abdelbasseet Zenzeri und Abdelkarim eine in Deutschland lebende Cousine auch Bayoudh verurteilt worden, Migranten nach nach Deutschland zu kommen, um hier zu ar- Italien geschleppt zu haben. Die fünf Fischer, beiten, doch die Bürgschaften und Verpflich- die ebenfalls an Bord der „Morthada“ und der tungserklärungen, die die Cousine auf sich „Mohamed El Hedi“ waren, wurden freige- nehmen müsste, sind zu teuer.
    [Show full text]