Author Search Results

1

article

Age and growth in Peale's dolphin (Lagenorhynchus australis) in subantarctic waters off southern South America

Authors: Boy, Claudia Clementina; Dellabianca, Natalia Andrea; Goodall, R. Natalie P.; Schiavini, Adrian Carlos Miguel

Publication Date: 2011.

Language: English.

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Abstract:

The Peale´s dolphin, Lagenorhynchus australis, is a mainly coastal and one of the most often seen species off southernmost South America from 33°S off Chile and 38°S off Argentina to south of Cape Horn. Although a common species, its IUCN status is “Data Defficient”, so any information on this species is relevant. Age, growth and physical maturity were examined in skeletons of 57 specimens of this species, mostly from the coasts of Tierra del Fuego, Argentina; this represents most of the known specimens of this species available in museum and private collections. Most specimens were by-catch in shore-set gillnets or had been harpooned for crab bait. Age was determined for 23 specimens, all from Tierra del Fuego. The maximum age was 13 years for a 199 cm female. The largest female in this survey was 210 cm, the largest male 205 cm in total length (12 years), but this probably does not represent the maximum length for this species. Only two animals, of 12 and 13 years, were physically mature. Animals reach asymptotic length (188 cm) with less than the 30% of the vertebral epiphyses fused. The animals in this study were mainly subadults, as has been found for other southern by-caught dolphins. Growth was studied for total length using 18 osteological characters with the Gompertz model. We propose that zygomatic width can be used to estimate total length for incomplete beach-cast specimens.

Author affiliation: Boy, Claudia Clementina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Goodall, R. Natalie P.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Schiavini, Adrian Carlos Miguel. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Keywords: Lagenorhynchus australis; Peale’s dolphin; Morphometrics; Age; Growth; Ecología; Ciencias Biológicas; CIENCIAS NATURALES Y EXACTAS.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

2

article

Cephalorhynchus commersonii, Commerson's Dolphin

Authors: Crespo, Enrique Alberto; Olavarria, C.; Dellabianca, Natalia Andrea; Iñíguez, M.; Ridoux, V.; Reeves, R.

Publication Date: 2017.

Language: English.

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Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

3

article

Clicks of wild Burmeister's porpoises (Phocoena spinipinnis) in Tierra del Fuego, Argentina

Authors: Reyes Reyes, María Vanesa; Marino, Alexander; Dellabianca, Natalia Andrea; Hevia, Marta; Torres, Monica Analia; Raya Rey, Andrea Nélida; Melcon, Mariana Laura

Publication Date: 2018.

Language: English.

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Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

4

doctoral thesis

Efectos de oscilaciones climáticas sobre el crecimiento de la tonina overa, Cephalorhynchus commersonii, en aguas subantárticas

Authors: Dellabianca, Natalia Andrea

Publication Date: 2011.

Language: Spanish.

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Repository: Naturalis (UNLP-FCNyM). Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo

5

article

Elemental concentrations in skin and internal tissues of Commerson’s dolphins (Cephalorhynchus commersonii) from subantarctic waters

Authors: Cáceres Saez, Iris; Ribeiro Guevara, Sergio; Prosser Goodall, Rae Natalie; Dellabianca, Natalia Andrea; Cappozzo, Humberto Luis

Publication Date: 2017.

Language: English.

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Abstract:

The skin of cetaceans is the most accessibletissue, and its sampling has been proposed as a noninvasivemethod to evaluate trace element concentrations in free-rangingpopulations. In the present work, concentrations ofessential (Cl, Na, K, Mg, Fe, Zn, Mn and Co), nonessential(As and Ag), and of unknown essentiality (Br, Rb and Cs)elements were determined in the skin from nine by-caughtCommerson´s dolphins (Cephalorhynchus commersonii)from Tierra del Fuego, Argentina. Skin correlations withinternal tissues (lung, liver, kidney and muscle) wereassessed to evaluate how the skin represents internal elementconcentration for monitoring purposes. Elementalcontents were analyzed by instrumental neutron activationanalysis (INAA). Regarding tissue distribution, skin hadthe highest concentration of Zn being two orders of magnitudehigher than internal tissues, while other elementssuch as Co and Rb had similar concentrations among tissues.High mean concentrations of Cl, Na, Mg, Br and Mnwere observed in the lung and liver. Our results support theuse of skin to evaluate Fe, Br and Rb concentrations ininternal tissues for biomonitoring purposes; however, otherelements did not show significant skin-to-tissue correlations.Overall, toxic element levels were far below concentrationsfound to cause harm in marine vertebrates. Thisstudy provided baseline data on elemental concentrationsin tissues of Commerson´s dolphins in subantarctic watersfrom the South Atlantic Ocean.

Author affiliation: Cáceres Saez, Iris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Ribeiro Guevara, Sergio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Unidad de Actividad de Ingeniería Nuclear. Laboratorio de Análisis por Activación Neutróica; Argentina

Author affiliation: Prosser Goodall, Rae Natalie. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; Argentina. Universidad Maimónides. Área de Investigaciones Biomédicas y Biotecnológicas. Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y de Diagnóstico; Argentina

Keywords: Epidermis; Bycaught dolphins; Trace elements; Biomonitoring; Otras Ciencias Biológicas; Ciencias Biológicas; CIENCIAS NATURALES Y EXACTAS.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

6

article

Heavy metals and essential elements in Commerson's dolphins (Cephalorhynchus c. commersonii) from the southwestern South Atlantic Ocean

Authors: Cáceres Saez, Iris; Ribeiro Guevara, Sergio; Dellabianca, Natalia Andrea; Prosser Goodall, Rae Natalie; Cappozzo, Humberto Luis

Publication Date: 2013.

Language: English.

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Abstract:

A survey of the elemental contents of K, Mg, Mn, Na, Cl, Br, Cs, Co, Rb, Fe, Zn, Al, Ti, V, As, Ag, Au and Cd in liver, kidney and muscle was performed in specimens of Commerson's dolphins (Cephalorhynchus c. commersonii) from subantarctic waters. The concentrations were determined by Instrumental Neutron Activation Analysis and the specimens derives from animals incidentally caught in artisanal fishing nets. Liver had the highest concentrations of Fe, 897(79) μg g-1 DW (dry weight) (average; standard deviation in parenthesis), kidney had the highest Cd, 35 (24) μg g-1 DW; Cl, 9,200 (1,700) μg g-1 DW; Na, 6,800 (1,100) μg g-1 DW and Br, 73(12) μg g-1 DW; and muscle the highest Mg 954 (71) μg g-1 DW. Potassium and Cs concentrations in muscle and kidney ranged in 12,510-13,020 and 0.230-0.252 μg g-1 DW, respectively; Zn and Mn concentrations were similar in liver and kidney (117-122.1 and 3.66-16.5 μg g-1 DW, respectively). Silver was high in liver 5.4(5.0) μg g-1 DW and kidney 1.2(2.7) μg g-1 DW. Gold, Rb, Co and As had no differences among tissues. Likewise, as in other odontocete species, the concentrations of essential elements showed little variation between the specimens analyzed, since they are regulated biochemically; however, heavy metals showed high variability. This study constitutes the first large description of the elemental composition in Commerson's dolphins from subantarctic waters of the South Atlantic Ocean.

Author affiliation: Cáceres Saez, Iris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina

Author affiliation: Ribeiro Guevara, Sergio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Unidad de Actividad de Ingeniería Nuclear. Laboratorio de Análisis por Activación Neutrónica; Argentina

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

Author affiliation: Prosser Goodall, Rae Natalie. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

Author affiliation: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina

Keywords: COASTAL WATERS; COMMERSON'S DOLPHIN; INSTRUMENTAL NEUTRON ACTIVATION ANALYSIS; SOUTH ATLANTIC OCEAN; TISSUE ANALYSIS; TRACE ELEMENT; Ecología; Ciencias Biológicas; CIENCIAS NATURALES Y EXACTAS.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

7

article

Hepatic and renal metallothionein concentrations in Commerson's dolphins (Cephalorhynchus commersonii) from Tierra del Fuego, South Atlantic Ocean

Authors: Cáceres Saez, Iris; Polizzi, Paula Sabrina; Romero, María Belén; Dellabianca, Natalia Andrea; Ribeiro, Sergio; Prosser Goodall, Rae Natalie; Cappozzo, Humberto Luis; Gerpe, Marcela Silvia

Publication Date: 2016.

Language: English.

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Abstract:

The Commerson's dolphin is the most common endemic odontocete of subantarctic waters of Tierra del Fuego, Argentina incidentally caught in fishing nets. The species is classified as "Data Deficient" by the IUCN. Metallothioneins (MTs) are considered as suitable biomarkers for health and environmental monitoring. The aims of the study were to assess MT concentrations in the liver and kidney of bycaught specimens. Moreover, correlations with Zn, Se, Cd, Ag and Hg, and the molar ratios of MT:metals were estimated to evaluate if there is an indication of their respective protective role against metal toxicity in tissues. Hepatic and renal MT concentrations were similar, ranging from 11.6 to 29.1 nmol·g-1 WW, and Kidney/Liver ratios ranging from 0.73 to 1.93 corresponded to normal ranges. Results suggest that MTs are related to physiological ranges for the species. This information constitutes the first MT report on Commerson's dolphins and possibly considered as baseline for species' conservation.

Author affiliation: Cáceres Saez, Iris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina

Author affiliation: Polizzi, Paula Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina

Author affiliation: Romero, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Ribeiro, Sergio. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Unidad de Actividad de Ingeniería Nuclear. Laboratorio de Análisis por Activación Neutróica; Argentina

Author affiliation: Prosser Goodall, Rae Natalie. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

Author affiliation: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina. Universidad Maimónides. Área de Investigaciones Biomédicas y Biotecnológicas. Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y de Diagnóstico; Argentina

Author affiliation: Gerpe, Marcela Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina

Keywords: METALLOTHIONEINS; SOUTHWESTERN SOUTH ATLANTIC OCEAN; SUBANTARCTIC DOLPHINS; TRACE ELEMENTS; Otras Ciencias Biológicas; Ciencias Biológicas; CIENCIAS NATURALES Y EXACTAS.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

8

article

Mercury and Selenium in Subantarctic Commerson's dolphins (Cephalorhynchus c. commersonii).

Authors: Cáceres Saez, Iris; Dellabianca, Natalia Andrea; Goodall, R. Natalie P.; Cappozzo, Humberto Luis; Ribeiro Guevara, Sergio

Publication Date: 2012.

Language: English.

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Abstract:

Total mercury (THg) and selenium (Se) concentrations were determined in hepatic, renal, and muscle tissues of seven specimens of Commerson´s dolphins incidentally captured in artisanal fisheries of Tierra del Fuego, Argentina, by instrumental neutron activation analysis. Liver yielded the mean highest concentration of THg 9.40 (9.92) μg g(-1) dry weight (DW) (standard deviation of the average in parenthesis); kidney and muscle showed similar values, ranging from 2.34 to 3.63 μg g(-1) DW. Selenium concentrations were similar in hepatic and renal tissues, with values from 13.62 to 14.56 μg g(-1) DW; the lowest concentration was observed in muscle, 4.13 (2.05) μg g(-1) DW. Among the specimens analyzed, the maximum concentrations of THg and Se were observed in the single adult female studied. An increasing age trend is observed for THg concentrations in tissues analyzed. The molar ratio of Se/Hg in the hepatic, renal, and muscle tissues were 8.7 (9.6), 13.2 (9.5), and 9.0 (11.4), respectively, suggesting Se protection against Hg toxicity. Silver concentrations in the three tissues were included, and the Se/(Hg + 0.5×Ag) molar ratio showed values closer to 1. Both Hg and Se concentrations in liver and kidney were comparable to those found in other small odontocetes from Argentine and Brazilian waters. This study constitutes the first joint description reported of Hg and Se concentrations in liver, kidney, and muscle of the Commerson´s dolphin species.

Author affiliation: Cáceres Saez, Iris. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

Author affiliation: Goodall, R. Natalie P.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

Author affiliation: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina

Author affiliation: Ribeiro Guevara, Sergio. Comision Nacional de Energia Atomica. Gerencia D/area de Energia Nuclear. Unidad de Actividad de Ingenieria Nuclear. Laboratorio de Analisis Por Activacion Neutronica; Argentina

Keywords: MERCURY; SELENIUM; SILVER; COMMERSON`S DOLPHINS; SOUTHWESTERN SOUTH ATLANTIC OCEAN; Ecología; Ciencias Biológicas; CIENCIAS NATURALES Y EXACTAS.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

9

article

New at-sea records of pelagic seabirds in the South Atlantic Ocean and Antarctica

Authors: Orgeira, Tomás José Luis; Scioscia, Gabriela; Torres, Monica Analia; Dellabianca, Natalia Andrea

Publication Date: 2013.

Language: English.

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Abstract:

In austral summer 1994-95, 2009, 2010, 2011 and 2012 during a ship-based seabird survey in the south Atlantic and Antarctica we documented at-sea distributions of Buller´s albatross (Thalassarche bulleri), Atlantic petrel (Pterodroma incerta), Softplumaged petrel (P. mollis), Kerguelen petrel (Lugensa brevirostris), and Great-winged petrel (P. macroptera). In some cases, sightings were considered as extralimital but for other species, their distributions need updating. Atlantic Petrel, for example, has been regularly observed in the Drake Passage and north of the Antarctic Peninsula for about 30 years, but the species distribution has not been updated in the literature. Our results will contribute to update the at sea species` distributions and their changes.

Author affiliation: Orgeira, Tomás José Luis. Ministerio de Relaciones Exteriores, Comercio Internacional y Culto. Direccion Nacional del Antártico; Argetnina;

Author affiliation: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Cientificas; Argentina;

Author affiliation: Torres, Monica Analia. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina;

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Cientificas; Argentina;

Keywords: SEABIRDS; ANTARCTICA; SOUTH ATLANTIC OCEAN; DISTRIBUTION; Ciencias Naturales y Exactas; Ciencias Biológicas; Ecología.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas

10

article

Occurrence of dusky dolphin lagenorhynchus obscurus in Tierra Del Fuego archipelago over five decades

Authors: Dellabianca, Natalia Andrea; Torres, Monica Analia; Raya Rey, Andrea Nélida

Publication Date: 2018.

Language: English.

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Abstract:

Dusky dolphins Lagenorhynchus obscurus are distributed in circumpolar temperate and cold temperate waters of the Southern hemisphere. In Tierra del Fuego, their presence had been considered occasional but in the last decade, they became very common along the Beagle Channel. Here, we evaluate the occurrence of dusky dolphins in Tierra del Fuego along 44 years. We also discuss the relationship of this population with their distribution in southern South America. We used three different datasets: sightings hosted in the Ocean Biogeographic Information System OBIS, incidental sightings, and shipboard sighting surveys. A total of 44 sightings of dusky dolphins in Tierra del Fuego were obtained from the three datasets from 1972 to 2016. Most individuals were recorded in the southern area of the Fuegian Archipelago. Between the 1970s and 90s their occurrence in the Beagle Channel was infrequent up to the year 2000. From 2009 to date, they were recorded each year in the Argentinean Beagle Channel waters during austral summer and fall months, suggesting at least, a seasonal resident population. Our results preclude assessing if the observed groups of dolphins in the southern portion of South America came originally from the Atlantic or Pacific Oceans populations. Molecular and spatial ecology studies (e.g., using satellite tags) could help to better understand which lineage they belong to and their spatio-temporal movements in the area.

Author affiliation: Dellabianca, Natalia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Provincia de Tierra del Fuego. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Torres, Monica Analia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Provincia de Tierra del Fuego. Museo Acatushún de Aves y Mamíferos Marinos Australes; Argentina

Author affiliation: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego. Instituto de Ciencias Polares, Recursos Naturales y Ambiente; Argentina

Keywords: BEAGLE CHANNEL; DISTRIBUTION; LAGENORHYNCHUS OBSCURUS; SOUTHERN SOUTH AMERICA; Ecología; Ciencias Biológicas; CIENCIAS NATURALES Y EXACTAS.

Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas