Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean
Título del documento: Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean
Revista: Genetics and molecular biology
Base de datos: PERIÓDICA
Número de sistema: 000418087
ISSN: 1415-4757
Autores: 1
3
2
1
Instituciones: 1Pontificia Universidade Catolica do Rio Grande do Sul, Faculdade de Biociencias, Porto Alegre, Rio Grande do Sul. Brasil
2Instituto Baleia Jubarte, Projeto Baleia Jubarte, Caravelas, Bahia. Brasil
3Universidade de Sao Paulo, Instituto de Biociencias, Sao Paulo. Brasil
Año:
Periodo: Mar
Volumen: 41
Paginación: 253-262
País: Brasil
Idioma: Inglés
Tipo de documento: Estadística o encuesta
Enfoque: Analítico
Resumen en inglés 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 (Ne ) and census (Nc ) 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 Ne was significantly supported over scenarios with moderate to strong size changes during the commercial whaling period. The previous generation Nc (Ne 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 Nc 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
Disciplinas: Biología,
Demografía
Palabras clave: Mamíferos,
Genética,
Censos y estadísticas,
Caza comercial,
Océano Atlántico Sudoccidental,
Ballenas,
Cuello de botella,
Ballena jorobada,
Megaptera novaeangliae,
Microsatélites,
Demografía
Keyword: Mammals,
Genetics,
Census and statistics,
Commercial hunting,
Southwestern Atlantic Ocean,
Whales,
Bottlenecks,
Humpback whales,
Megaptera novaeangliae,
Microsatellites,
Demography
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