A5057620387- Aquatic Invertebrate Ecology and Behavior
- Marine Biology and Ecology Research
- Mollusks and Parasites Studies
- Parasite Biology and Host Interactions
- Marine Bivalve and Aquaculture Studies
- Helminth infection and control
- Parasites and Host Interactions
- Marine and coastal plant biology
- Cephalopods and Marine Biology
- Marine Ecology and Invasive Species
- Subterranean biodiversity and taxonomy
- Environmental Toxicology and Ecotoxicology
- Marine Biology and Environmental Chemistry
- Species Distribution and Climate Change
- Nematode management and characterization studies
- Paleopathology and ancient diseases
- Insect and Arachnid Ecology and Behavior
- Marine and fisheries research
- Animal and Plant Science Education
- Ocean Acidification Effects and Responses
- Invertebrate Taxonomy and Ecology
Bernardino Rivadavia Natural Sciences Museum
2010-2019
Consejo Nacional de Investigaciones Científicas y Técnicas
2007-2019
Universidad Nacional de La Plata
1994-2005
Abstract Over a two-years period, survey was carried out in order to increase the knowledge of digeneans parasitising commonest intertidal gastropods on Patagonian coast, Southwestern Atlantic Ocean. A total 4,725 were examined. Six species digenean four snail found; them registered for first time: Maritrema sp. 1 (Microphallidae) Crepidula dilatata (Calyptraeidae), Parorchis (Philophtalmidae) and sporocyst Renicolidae Trophon geversianus (Muricidae), Diphterostomum (Zoogonidae) Buccinanops...
Abstract. New data on shell reactions elicited by larval digeneans in bivalves from Recent sub‐Antarctic populations and late Holocene Patagonian deposits are reported. Shell alterations, which traces of digenean trematode infections, were found affecting intertidal bivalve Malvinas (Falkland) Islands, Burdwood Bank, Beagle Channel, at Tierra del Fuego (Argentina). The species involved belonged to the families Nuculanidae, Cyamiidae, Neoleptonidae. Such consisted quite unusual dome or...
Darina solenoides (Mactridae), a common intertidal bivalve in the Argentine Patagonian coast, serves as both first and second intermediate host for gymnophallid Bartolius pierrei (Trematoda: Digenea). Cercariae enter clams actively by piercing mantle border; young metacercariae ascend along space between outer epithelium shell they settle dorsal general extrapallial just ahead of posterior adductor muscle. Host reaction comprises tissue alterations (hyperplasia metaplasia) leading to...
Annual growth of Corbicula fluminea has been estimated by following the shift in size‐frequency peaks based upon shell lengths. Normal curves were fitted to mean length for each generation, or age group. The study was monthly and bimonthly samples taken from an natural population at Punta Atalaya, Rio de La Plata, Argentina, colonized September 1982. age‐length relationship determined using Von Bertalanffy's equation. C. slows markedly during fall‐winter period, April August. Theoretical...
A systematic revision of the genus Neolepton in southern South America has been carried out. concentricum, N. cobbi, hupei and falklandicum are redescribed figured, lectotypes for concentricum bennetti designated. Three new species described, two from Magellanic Province (N. amatoi yagan species) one Argentine bonaerense species). The presence umbonatum waters is considered doubtful. Some reproductive characteristics peculiarities brooding behaviour described.
Morphological and molecular evidence suggest that specimens formerly described as Lacunovermis sp. from Nacella (Patinigera) spp. (Patellogastropoda: Patellidae) belong to a new species of Gymnophalloides Fujita, 1925. Based on the information, they are identified nacellae n. The differs tokiensis, seoi, heardi mainly through presence group papillae located ventral surface between oral suckers. A detailed morphological study revealed lack pars prostatica, character previously reported in G....
This contribution provides the first integrative revision of Siphonaria species described and reported from southern South America, by combining information on shell morphology, distal portion genital system, radula, molecular data living animal. More than 200 lots, all along Uruguayan, Argentinean Chilean coasts, including Malvinas (Falkland) Islands Georgia, were studied. Among nine nominal listed for this area, only presence lessonii Blainville, 1827 S. lateralisGould, 1846 could be...
This work describes the parasites and their respective pathologies in stout razor clam, Tagelus plebeius (Lightfoot, 1786) (Psammobiidae) from Argentinean coasts. It represents first report about a histopathological survey for these species Southwestern Atlantic. Specimens of T. were collected at Mar Chiquita coastal lagoon (37°46′S, 57°27′W) (n = 104 dissected under stereomicroscope, n 28 histologically sectioned microscopically examined) mouth Quequén Salado River (38°56′S, 60°33′W) 14...
Abstract. I describe an unusual case of follicular oogenesis in a bivalve, Gaimardia trapesina , common marine bivalve from the Magellan Region and adjacent Sub‐Antarctic waters, whose members brood their developing larvae. The gonad G. is acinus organ that infiltrates perivisceral connective tissue; walls acini are formed by tall, slender cells with distal nuclei, supported thin conjunctive tissue layer. At onset vitellogenesis, each oocyte becomes surrounded one‐cell‐thick layer follicle...
Fil: Scarano, Maria Agostina. Universidad Nacional de La Plata. Facultad Ciencias Naturales y Museo. Division Zoologia Invertebrados; Argentina. Consejo Investigaciones Cientificas Tecnicas. Centro Cientifico Tecnologico Conicet - Plata; Argentina
This paper describes the organism–organism relationship between a bivalve host and larval digeneans. The studied population of stout razor clam Tagelus plebeius from mixohaline Mar Chiquita lagoon (37° 32′S 57° 19′W) showed 100% prevalence infection by digenean (metacercaria) family Gymnophallidae. larvae occupied extrapallial space just below hinge bivalve. tissue reaction against digeneans T. consisted hyperplasia metaplasia outer layer mantle epithelium adjacent to parasites, forming an...
Temporal variations in prevalence and intensity of infection larval trematodes their second intermediate host, the bivalve Neolepton cobbi, were studied relative to host population dynamics season intertidal zone Patagonian rocky shores. Two gymnophallid metacercariae Gymnophallidae sp. Bartolius found parasitizing N. cobbi. The parameters related size structure population. high values between late winter early austral summer coincided with dominance larger classes Conversely, lower...
Abstract Tonicia lebruni , a common, lower intertidal and subtidal chiton inhabiting Patagonian rocky shores, is gonochoristic iteroparous species producing large eggs (≈ 400 μm in diameter), which are fertilized brooded within the pallial groves until released as juveniles. A free larval stage absent, despite this, T. widely distributed along south‐western Atlantic. At Puerto Deseado, has marked seasonality reproductive cycle, reproducing only once year. The period quite short defined time:...
Fil: Ituarte, Cristian Federico. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina Coordinacion Administrativa Parque Centenario. Museo Argentino Ciencias Naturales “Bernardino Rivadavia”; Argentina
Haplosporidium patagon was found parasitizing Siphonaria lessonii and S. lateralis, 2 siphonariid gastropods co-occurring on the littoral rocky shore at Puerto Deseado, Santa Cruz, Argentina. Gastropods from habitats representing different levels of environmental harshness were studied. In both cases, showed a higher prevalence infection (3.78%) over entire 14 mo study period than lateralis (0.13%). Very values observed sampling sites: Site 1, more restrictive habitat (exposed for long...