Data/hora: 11/06/2024 15:51:08

Provedor de dados: 	74	
País: 	Brazil	
Título: 	Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean	
Autores: 	Cypriano-Souza,Ana Lúcia; da Silva,Tiago Ferraz; Engel,Márcia H.; Bonatto,Sandro L.	
Data: 	2018-01-01	
Ano: 	2018	
Palavras-chave: 	Commercial whaling; Bottleneck; Humpback whale; Microsatellites; Demography.	
Resumo: 	Abstract 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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200253	
Editor: 	Sociedade Brasileira de Genética	
Relação: 	10.1590/1678-4685-gmb-2017-0052	
Formato: 	text/html	
Fonte: 	Genetics and Molecular Biology  v.41 n.1 suppl.1 2018	
Fonte: 	info:eu-repo/semantics/openAccess