ORCID Profile
0000-0003-4023-9908
Current Organisations
Universidad de Bogotá Jorge Tadeo Lozano
,
Revista Digital Fulica
,
Universidad de los Andes
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Publisher: Elsevier BV
Date: 08-2019
DOI: 10.1016/J.MARPOLBUL.2019.04.076
Abstract: A small and genetically isolated bottlenose dolphin (Tursiops truncatus) population resides year-round in the Bocas del Toro Archipelago-Panama (BDT). Photo-identification and genetic data showed that this dolphin population is highly phylopatric and is formed exclusively by in iduals of the "inshore form". This study aimed to investigate the trophic ecology and mercury concentrations of bottlenose dolphins in BDT to assess their coastal habits. We collected muscle s les (n = 175) of 11 potential fish prey species, and skin s les from free-ranging dolphins in BDT (n = 37) and La Guajira-Colombia (n = 7) to compare isotopic niche width. Results showed that BDT dolphins have a coastal feeding habit, belong to the "inshore form" (δ
Publisher: Oxford University Press (OUP)
Date: 28-08-2021
Abstract: The Atlantic spotted dolphin (Stenella frontalis) is endemic to tropical, subtropical, and warm temperate waters of the Atlantic Ocean. Throughout its distribution, both geographic distance and environmental variation may contribute to population structure of the species. In this study, we follow a seascape genetics approach to investigate population differentiation of Atlantic spotted dolphins based on a large worldwide dataset and the relationship with marine environmental variables. The results revealed that the Atlantic spotted dolphin exhibits population genetic structure across its distribution based on mitochondrial DNA control region (mtDNA-CR) data. Analyses based on the contemporary landscape suggested, at both the in idual and population level, that the population genetic structure is consistent with the isolation-by-distance model. However, because geography and environmental matrices were correlated, and because in some, but not all analyses, we found a significant effect for the environment, we cannot rule out the addition contribution of environmental factors in structuring genetic variation. Future analyses based on nuclear data are needed to evaluate whether local processes, such as social structure and some level of philopatry within populations, may be contributing to the associations among genetic structure, geographic, and environmental distance.
Publisher: Marine and Coastal Research Institute INVEMAR
Date: 26-05-2021
DOI: 10.25268/BIMC.INVEMAR.2021.50.SUPLESP.951
Abstract: The leopard seal (Hydrurga leptonyx) is a genetically low-studied species. In order to conduct the first genetic ersity assessment of this species in Danco Coast (Antarctic Peninsula), 423 bp of the mitochondrial DNA Control Region (mtDNA-CR) was sequenced from 13 blood s les collected in Primavera Base (62º15’S, 58º39’W) during the 2011-2012 austral summer. Our results showed high haplotype ersity (h = 0.99), with various ergent haplotypes. Our findings suggest that leopard seals in the Danco Coast could represent different phylogroups however, including more genetic markers are needed to confirm this hypothesis.
Location: Colombia
No related grants have been discovered for Dalia C. Barragán-Barrera.