Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean
| Autor: | Ana Lúcia Cypriano-Souza, Marcia H. Engel, Sandro L. Bonatto, Tiago Ferraz da Silva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine bottleneck demography lcsh:QH426-470 Population Biology 010603 evolutionary biology 01 natural sciences microsatellites Humpback whale 03 medical and health sciences Effective population size Abundance (ecology) Genetics Whaling humpback whale education Molecular Biology Research Articles Genetic diversity education.field_of_study Commercial whaling Census biology.organism_classification Fishery lcsh:Genetics 030104 developmental biology Approximate Bayesian computation |
| Zdroj: | Genetics and Molecular Biology Genetics and Molecular Biology, Volume: 41, Issue: 1 Supplement 1, Pages: 253-262, Published: 2018 Genetics and Molecular Biology, Vol 41, Iss 1 suppl 1, Pp 253-262 Genetics and Molecular Biology v.41 n.1 suppl.1 2018 Sociedade Brasileira de Genética (SBG) instacron:SBG |
| ISSN: | 1678-4685 1415-4757 |
| Popis: | Genotypes of 10 microsatellite loci of 420 humpback whales from the Southwestern Atlantic Ocean population were used to estimate for the first time its contemporary effective (N e) and census (N c) population sizes and to test the genetic effect of commercial whaling. The results are in agreement with our previous studies that found high genetic diversity for this breeding population. Using an approximate Bayesian computation approach, the scenario of constant N e was significantly supported over scenarios with moderate to strong size changes during the commercial whaling period. The previous generation N c (N e multiplied by 3.6), which should corresponds to the years between around 1980 and 1990, was estimated between ~2,600 and 6,800 whales (point estimate ~4,000), and is broadly compatible with the recent abundance surveys extrapolated to the past using a growth rate of 7.4% per annum. The long-term N c in the constant scenario (point estimate ~15,000) was broadly compatible (considering the confidence interval) with pre-whaling catch records estimates (point estimate ~25,000). Overall, our results shown that the Southwestern Atlantic Ocean humpback whale population is genetically very diverse and resisted well to the strong population reduction during commercial whaling. |
| Databáze: | OpenAIRE |
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