Conexión migratoria entre zonas de cría del Pacífico Este y áreas de alimentación en la Península Antártica basado en coincidencias de genotipos individuales

• Caballero, Susana ^[1] ; Steel, Debbie ^[2] ; Pallin, Logan ^[3] ; Botero-Acosta, Natalia ^[4] ; Felix, Fernando ^[5] ; Olavarría, Carlos ^[6] ; Diazgranados, Maria Claudia ^[7] ; Bessudo, Sandra ^[8] ; Friedlander, Ari ^[3] ; Baker, C. Scott ^[2]
  1. [1] Universidad de Los Andes

     Universidad de Los Andes

     Colombia

     
  2. [2] Oregon State University

     Oregon State University

     Estados Unidos

     
  3. [3] Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Coastal Biology Building, 130 McAllister Way, Santa Cruz, CA 95060, USA
  4. [4] Fundación Macuaticos Colombia, Calle 27 No. 79-167, Medellin, Colombia
  5. [5] Museo de Ballenas, Salinas, Ecuador/PO Box 09-06-2370, Guayaquil, Ecuador
  6. [6] Centro de Estudios Avanzados en Zonas Aridas (CEAZA), Raúl Bitrán 1305, La Serena, Chile
  7. [7] Programa Marino, Conservation International, Carrera 13 No. 71-41, Bogota, Colombia
  8. [8] Fundación Malpelo y otros Ecosistemas Marinos, Carrera 11 No. 87-51, Bogota, Colombia

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• Localización: Boletín de Investigaciones Marinas y Costeras, ISSN-e 2590-4671, ISSN 0122-9761, Vol. 50, Nº. Extra 1, 2021, págs. 31-40
• Idioma: español
• Títulos paralelos:
  • Migratory connections among breeding grounds off the Eastern Pacific and feeding areas in the Antarctic Peninsula based on genotype matching
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• Resumen

  • Humpback whales (Megaptera novaeangliae) have a cosmopolitan distribution with populations in all three major ocean basins.  Six breeding stocks have been recognised by the IWC that feed around Antarctica and breed in the tropics.  The identity of each of these stocks has been defined based on their distribution in high latitude feeding grounds and breeding grounds in tropical sites.  Migratory connections between summer and winter grounds have been suggested for these stocks based on photo ID comparisons and genetic analyses.  We analysed 114 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 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.