Browsing by Autor "Sandra Bessudo"

Now showing 1 - 4 of 4

Listado de especies del Monte submarino Bajo Navegador en el Distrito Nacional de Manejo Integrado de Yuruparí
(2026) Sandra Bessudo; Felipe Ladino; Andrea Ocampo; Felipe Muriel; Andrés Tzolkin González Cuellar; Estefania Rojas; Jhon Anderson Colmenares Carvajal; Sandra Bessudo; Felipe Ladino Archila
Migratory connections among breeding grounds off the Eastern Pacific and feeding areas in the Antarctic Peninsula based on genotype matching
(Instituto de Investigaciones Marinas y Costeras, 2021) Susana Caballero; Debbie Steel; Logan J. Pallin; Natalia Botero; Fernando Félix; Carlos Olavarría; María Claudia Diazgranados; Sandra Bessudo; Ari S. Friedlaender; C. Scott Baker
We analysed 114 DNA samples collected in different locations within the stock G breeding grounds, including Ecuador and the northern and southern Pacific of Colombia. We genotyped 15 microsatellite loci, sexed all samples, and performed genotype comparisons. Genotype comparisons were done using a DNA register of previously genotyped individuals from the Colombian breeding ground and the Antarctic Peninsula feeding Area. We confirmed connectivity between feeding grounds in Antarctic Peninsula and breeding grounds in Colombia and Ecuador using microsatellite loci. We found recaptures within each sampling location in the same year, but we also found a few recaptures in the same locations between years both in breeding and feeding grounds. Interestingly, we found recaptures between breeding and feeding grounds using samples collected 20 years apart, providing some information about longevity in this stock. Further comparisons with other data sets (Brazil, North Pacific) are needed to understand the migratory connectivity of this stock.
Monitoreo de fauna pelágica de los Montes submarinos del Pacífico colombiano usando BRUVS
(Alexander von Humboldt Biological Resources Research Institute, 2022) Felipe Ladino Archila; Diego Cardeñosa; Sandra Bessudo; Andrés Tzolkin González Cuellar; Felipe Muriel; John Sebastián Rojas Carvajal; Diego Fernando Amariles; Alejandra Duarte
En diciembre de 2021 se desarrolló la primera expedición a los montes submarinos de las dorsales de Malpelo y de Yuruparí. En total se exploraron ocho montes submarinos por medio de BRUVS (Baited Remote Underwater Video Systems). Se desplegaron 48 BRUVS, registrando cinco especies pelágicas (Sphyrna lewini, Mobula birostris, Pteroplatytrygon violácea, Kajikia audax y Istiophorus platypterus), donde Pteroplatytrygon violácea constituyó un nuevo registro para la región. En todas las zonas se registraron especies pelágicas, aunque los tiburones se asociaron exclusivamente a los montes al oeste de las dorsales, en especial al monte conocido como Bajo Navegador, el más somero de la región. Este trabajo es un primer paso para orientar las siguientes exploraciones de estos ecosistemas.
Population assessment of the endemic angelfish Holacanthus limbaughi from Île de La Passion-Clipperton Atoll (Tropical Eastern Pacific)
(Inter-Research, 2019) Éric Clua; Sandra Bessudo; JE Caselle; C. Chauvet; Christian H. Jost; AM Friedlander
We provide the first assessment for a coral reef fish population of a potentially threatened endemic species from a remote and isolated oceanic island. Based on a 3-dimensional (3D) numerical field model of the reef habitat and underwater visual censuses conducted by 2 different teams in February and May 2016, we show that the 3.7 km 2 of the Clipperton Atoll reefs shallower than 30 m host > 50 000 ind. (average density of 0.02 ind. m -2 ) of the endemic Clipperton angelfish Holacanthus limbaughi. Based on limited submersible observations to 150 m, the population likely extends below the 30 m depth stratum, resulting in an even larger population size and providing a potential depth refuge against expected warming ocean temperatures.