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Genetic composition of green turtle feeding grounds in coastal waters of Argentina based on mitochondrial DNA
TLDR
The present results improve knowledge of the population structure and migration patterns of the Atlantic green turtle, and inform conservation measures on feeding grounds, which may be thousands of kilometers away from the nesting colonies. Expand
Spatial Genetic Structure and Mitochondrial DNA Phylogeography of Argentinean Populations of the Grasshopper Dichroplus elongatus
TLDR
Analysis of patterns of genetic variation in the South American grasshopper Dichroplus elongatus concludes that males appear to disperse more than females, reducing the chance of the genetic loss associated with recent anthropogenic fragmentation of the D. elongatus studied range. Expand
Supernumerary heterochromatin, chiasma conditions and abnormal sperm formation in Dichroplus elongatus (Orthoptera): intra and interpopulation analysis
TLDR
The cytophotometric analysis of DNA content revealed that in both types of males, B and non B carriers, most macrospermatids are diploid suggesting a probably origin by cytokinesi... Expand
Origin and genetic diversity of leatherbacks (Dermochelys coriacea) at Argentine foraging grounds
TLDR
Findings demonstrate the connection between nesting and foraging areas in the South Atlantic and illustrate the importance of the Malvinas ecoregion to the survival of migratory marine vertebrates, such as leatherbacks. Expand
Population differentiation in the grasshopper Sinipta dalmani: body size varies in relation to karyotype and climatic conditions
TLDR
The results in S. dalmani demonstrate significant variation in body size within polymorphic populations and among geographical populations, which may be explained under a selective scenario. Expand
Chromosome polymorphisms in natural populations of the South American grasshopper Sinipta dalmani
TLDR
The results showed that the chromosome polymorphisms in S. dalmani may be associated with a significant decrease in genetic recombination, which may explain in part their maintenance in some areas of its geographical distribution. Expand
Meiotic Behaviour and Dosage Effect of B-Chromosomes on Recombination in Dichroplus Elongatus (Orthoptera: Acrididae)
TLDR
A detailed analysis of four B carrying individuals from the same population is reported, finding that univalents or terminally associated B bivalents could persist even to first anaphase migrating undivided to the same pole. Expand
Parallel polymorphisms for supernumerary heterochromatin in Dichroplus elongatus (Orthoptera):
TLDR
B individuals present an increase of abnormal spermatid frequency which may be explained by the simultaneous occurrence of two mechanisms: 1) lagging of supernumeraries and 2) physiological effects of B's affecting the meiosis even in cells lacking them. Expand
Effects of chromosome rearrangements on sperm formation in Sinipta dalmani (Orthoptera: Acrididae)
TLDR
The DNA content of giant spermatids was mainly 2c, suggesting that there may be any meiotic misbehaviour during meiosis, and other mechanism, such as cell fusion, may be involved in the production of abnormal sperm. Expand
On the origin of B-chromosomes: neo XY systems and X-like supernumeraries in Orthoptera
TLDR
It is pointed out that small Bs could originate from polysomy of the smallest chromosomes, tolerated because of the few genes involved in Cylindrotettix obscurus, and the minute-B category is attributed to residua... Expand
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