scholarly journals Population Structure of mtDNA Variation due to Pleistocene Fluctuations in the South American Maned Wolf (Chrysocyon brachyurus, Illiger, 1815): Management Units for Conservation

2015 ◽  
Vol 106 (S1) ◽  
pp. 459-468 ◽  
Author(s):  
Susana González ◽  
Mariana Cosse ◽  
María del Rosario Franco ◽  
Louise Emmons ◽  
Carly Vynne ◽  
...  
Keyword(s):  
Population Structure ◽  
South American ◽  
The South ◽  
Management Units ◽  
Mtdna Variation ◽  
Maned Wolf ◽  
Chrysocyon Brachyurus

scholarly journals Population structure and historical demography of South American sea lions provide insights into the catastrophic decline of a marine mammal population

2016 ◽  
Vol 3 (7) ◽  
pp. 160291 ◽  
Author(s):  
J. I. Hoffman ◽  
G. J. Kowalski ◽  
A. Klimova ◽  
L. J. Eberhart-Phillips ◽  
I. J. Staniland ◽  
...  
Keyword(s):  
Population Structure ◽  
Large Scale ◽  
Conservation Management ◽  
Population Decline ◽  
Natural Populations ◽  
Hypervariable Region ◽  
Baseline Data ◽  
South American ◽  
The South ◽  
Demographic Bottleneck

Understanding the causes of population decline is crucial for conservation management. We therefore used genetic analysis both to provide baseline data on population structure and to evaluate hypotheses for the catastrophic decline of the South American sea lion ( Otaria flavescens ) at the Falkland Islands (Malvinas) in the South Atlantic. We genotyped 259 animals from 23 colonies across the Falklands at 281 bp of the mitochondrial hypervariable region and 22 microsatellites. A weak signature of population structure was detected, genetic diversity was moderately high in comparison with other pinniped species, and no evidence was found for the decline being associated with a strong demographic bottleneck. By combining our mitochondrial data with published sequences from Argentina, Brazil, Chile and Peru, we also uncovered strong maternally directed population structure across the geographical range of the species. In particular, very few shared haplotypes were found between the Falklands and South America, and this was reflected in correspondingly low migration rate estimates. These findings do not support the prominent hypothesis that the decline was caused by migration to Argentina, where large-scale commercial harvesting operations claimed over half a million animals. Thus, our study not only provides baseline data for conservation management but also reveals the potential for genetic studies to shed light upon long-standing questions pertaining to the history and fate of natural populations.

Population structure in the South American tern Sterna hirundinacea in the South Atlantic: two populations with distinct breeding phenologies

2010 ◽  
Vol 41 (4) ◽  
pp. 378-387 ◽  
Author(s):  
Patrícia J. Faria ◽  
Fausto P. Campos ◽  
Joaquim O. Branco ◽  
Cézar M. Musso ◽  
João S. Morgante ◽  
...  
Keyword(s):  
Population Structure ◽  
South Atlantic ◽  
South American ◽  
The South ◽  
Two Populations

Population structure and natural history of the South American fruit‐feeding butterfly Taygetis ypthima (Lepidoptera: Nymphalidae)

2019 ◽  
Vol 58 (4) ◽  
pp. 753-761
Author(s):  
Vanessa Schaeffer Pedrotti ◽  
Nicolás Oliveira Mega ◽  
Helena Piccoli Romanowski
Keyword(s):  
Population Structure ◽  
Natural History ◽  
South American ◽  
The South ◽  
History Of ◽  
History Of The South

Cnidochloa: A New Genus of Grasses from Brazil (Poaceae: Panicoideae: Paniceae)

2020 ◽  
Vol 105 (2) ◽  
pp. 183-194
Author(s):  
Fernando O. Zuloaga ◽  
Sandra S. Aliscioni ◽  
M. Amalia Scataglini
Keyword(s):  
New Genus ◽  
Phylogenetic Position ◽  
South American ◽  
The South ◽  
South American Species ◽  
Molecular Characters

Generic boundaries of the South American species Panicum longipedicellatum Swallen are explored and compared with allied genera of the tribe Paniceae. On the basis of morphological, anatomical, and molecular characters a new genus, Cnidochloa Zuloaga, is proposed. The phylogenetic position of the new genus within the Paniceae is evaluated.

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