New records of Aedes aegypti at the southern limit of its distribution in Buenos Aires province, Argentina

2015 ◽  
Vol 40 (2) ◽  
pp. 408-411 ◽  
Author(s):  
Gabriela Zanotti ◽  
María Sol De Majo ◽  
Iris Alem ◽  
Nicolás Schweigmann ◽  
Raúl E. Campos ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Buenos Aires ◽  
New Records ◽  
Buenos Aires Province ◽  
Southern Limit

Long-term spatio-temporal dynamics of the mosquito Aedes aegypti in temperate Argentina

2016 ◽  
Vol 107 (2) ◽  
pp. 225-233 ◽  
Author(s):  
S. Fischer ◽  
M.S. De Majo ◽  
L. Quiroga ◽  
M. Paez ◽  
N. Schweigmann
Keyword(s):  
Aedes Aegypti ◽  
Buenos Aires ◽  
Temporal Dynamics ◽  
Spatial Dynamics ◽  
Climatic Conditions ◽  
Buenos Aires Province ◽  
Southern Limit ◽  
Spatio Temporal ◽  
Lower Temperature

AbstractBuenos Aires city is located near the southern limit of the distribution of Aedes aegypti (Diptera: Culicidae). This study aimed to assess long-term variations in the abundance of Ae. aegypti in Buenos Aires in relation to changes in climatic conditions. Ae. aegypti weekly oviposition activity was analyzed and compared through nine warm seasons from 1998 to 2014, with 200 ovitraps placed across the whole extension of the city. The temporal and spatial dynamics of abundances were compared among seasons, and their relation with climatic variables were analyzed. Results showed a trend to higher peak abundances, a higher number of infested sites, and longer duration of the oviposition season through subsequent years, consistent with a long-term colonization process. In contrast, thermal favorability and rainfall pattern did not show a consistent trend of changes. The long-term increase in abundance, and the recently documented expansion of Ae. aegypti to colder areas of Buenos Aires province suggest that local populations might be adapting to lower temperature conditions. The steadily increasing abundances may have implications on the risk of dengue transmission.

scholarly journals The ghost of climatic change in the geographic distribution of Tillandsia aeranthos (Bromeliaceae)

Rodriguésia ◽  
2020 ◽  
Vol 71 ◽  
Author(s):  
Elián Leandro Guerrero
Keyword(s):  
South America ◽  
Climatic Change ◽  
Geographic Distribution ◽  
Buenos Aires ◽  
New Records ◽  
Southern Limit ◽  
New Findings ◽  
Southward Shift ◽  
Possible Cause ◽  
Color Variants

Abstract The geographic distribution of Tillandsia aeranthos is updated with new records. Its southern limit is extended 200 kilometers in a zone previously studied by many botanists and naturalists, but also in poorly explored areas. For this reason, the possibility that the change in distribution is recent is postulated and discussed. The coincidence of this change with the southward shift in the isohyets and the decrease of winter frost frequency are highlighted as a possible cause of the advance to the south. In addition, two petal color variants of this species are first mentioned for Argentina. The new findings display that it is necessary to further explore some dry forests of eastern Buenos Aires and study the possible consequences of the climatic change in the biota of South America.

New records of Hippidion principale and Equus neogeus from Salado River (Buenos Aires Province, Argentina)

2018 ◽  
Vol 289 (2) ◽  
pp. 123-138
Author(s):  
José L. Prado ◽  
María T. Alberdi ◽  
Ricardo Bonini ◽  
Héctor Crispiani
Keyword(s):  
Buenos Aires ◽  
New Records ◽  
Buenos Aires Province ◽  
Salado River

scholarly journals Squamata, Scincidae, Mabuya dorsivittata (Cope, 1862): distribution extension in Buenos Aires province, Argentina

Check List ◽  
2011 ◽  
Vol 7 (3) ◽  
pp. 388 ◽  
Author(s):  
Jorge Williams ◽  
Federico Kacoliris
Keyword(s):  
South America ◽  
Buenos Aires ◽  
New Records ◽  
Wide Distribution ◽  
Buenos Aires Province ◽  
Previous Record ◽  
Northern Sector

Mabuya dorsivttata is a lizard with a wide distribution in South America. In Buenos Aires province, Argentina, previous voucher records exist only from its northern sector and from Mar del Plata city. In this work, two new records of M. dorsivittata from Buenos Aires province are presented: (1) Azul city (36°46’50” S, 50°51’10” W) and (2) Mar del Tuyú city (37°20’08” S, 59°07’60” W). These new records are located about 175 km from the nearest previous record. 

scholarly journals Trophic ecology of Mugil liza at the southern limit of its distribution (Buenos Aires, Argentina)

2015 ◽  
Vol 63 (3) ◽  
pp. 271-277 ◽  
Author(s):  
Gustavo Thompson ◽  
Roberta Callico Fortunato ◽  
Ignacio Chiesa ◽  
Alejandra Volpedo
Keyword(s):  
Trophic Ecology ◽  
Buenos Aires ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Benthic Fauna ◽  
Fine Sand ◽  
Coarse Sand ◽  
Buenos Aires Province ◽  
Southern Limit ◽  
Rates Of Growth

AbstractIn order to get to know the habitat and feeding habits of Mugil liza on the southern coast of Buenos Aires province, 65 specimens obtained at two sampling sites - the San Blas bay (SBB) and the mouth of the Quequén-Salado river (QSR) - during spring (November 2012) and summer (February 2013) were analyzed. Specimens were measured, sexed and weighed, their stomachs were removed and their stomach contents weighed and analyzed under the stereoscopic microscope. The specimens were adults, 28-49 cm in length and weighing 380-1100 g. Population growth was higher in the SBB (TW: 0.003*TL3.36), than in RQS (TW: 0.045*TL2.61). About 98% of the stomachs had some content, their repletion rate being of between 0.4 and 1.2%. About 75% of the stomachs contained very fine sand with few benthic organisms (algae, copepods, foraminifera), whereas the remaining 25% of stomachs contained coarse sand and a greater presence of benthic fauna (amphipods, bivalves, gastropods and coral organisms). The linear relationship between the weight of stomach contents and the total weight and length of the fish showed that the rates of growth (slope) were the same at both sites, but intercept values were significantly higher for San Blas bay (test parallelism; p < 0.001).

scholarly journals Nuevos registros de Lagostomus Brookes, 1828 (Rodentia, Chinchillidae) en el Mioceno tardío de Argentina y su importancia bioestratigráfica

2020 ◽  
Vol 47 (2) ◽  
pp. 430
Author(s):  
Luciano Luis Rasia ◽  
Ricardo A. Bonini ◽  
Adriana M. Candela
Keyword(s):  
Late Miocene ◽  
Buenos Aires ◽  
New Records ◽  
San Juan ◽  
Buenos Aires Province ◽  
Geographic Scale ◽  
Previous Hypothesis

In this work, we present two new records of Lagostomus from the late Miocene of Argentina. A right mandible from the Huachipampa Formation (Loma del Camello, San Juan Province) is assigned to Lagostomus telenkechanum, previously recorded in the Arroyo Chasicó Formation (Chasicoan Stage/Age, late Miocene; Arroyo Chasicó, Buenos Aires Province). A skull fragment from the Cerro Azul Formation (Salinas Grandes de Hidalgo, La Pampa Province) is referred to L. pretrichodactyla, previously recorded in several units assigned to the Huayquerian Stage/Age (late Miocene) in Catamarca and Mendoza provinces, and sediments of uncertain age in Buenos Aires Province. The presence of L. telenkechanum in the Huachipampa Formation supports a Chasicoan age for this unit, which corroborates previous hypotheses, and extends the area of distribution of this species. The presence of L. pretrichodactyla in the Cerro Azul Formation suggests a late Miocene age (probably Messinian) for this unit, at least at Salinas Grandes de Hidalgo, supporting previous hypothesis. These new records allow recognizing the biostratigraphic value of Lagostomus to a higher geographic scale than previously considered.

scholarly journals Ischnura ultima Ris, 1908 (Odonata: Coenagrionidae): new records from southern South America

Check List ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 187
Author(s):  
Javier Muzón ◽  
Alejandro Del Palacio ◽  
Lía Ramos
Keyword(s):  
South America ◽  
Buenos Aires ◽  
New Records ◽  
Buenos Aires Province ◽  
Southern South America ◽  
Endemic Areas ◽  
First Time

Ischnura ultima Ris, 1908 is recorded for the first time from Buenos Aires Province, Argentina, 750 km southeast from the southernmost previous known localities (Córdoba Province). This finding supports a stronger biogeographical relationship between the southern hills of Buenos Aires (surrounded by the Pampas lowlands) and the Monte province. In addition, this record supports the odonate endemic areas scheme previously proposed for Argentina.

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