Consulta: creatorFacets:"Engel,Márcia H."
Registros recuperados: 2
Data/hora: 10/06/2024 01:21:08

Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean
Provedor de dados: Genetics and Molecular Biology
Autores: Cypriano-Souza,Ana Lúcia; da Silva,Tiago Ferraz; Engel,Márcia H.; Bonatto,Sandro L.
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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Commercial whaling; Bottleneck; Humpback whale; Microsatellites; Demography.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200253

Behavior of humpback whales, Megaptera novaeangliae (Cetacea: Balaenopteridae): comparisons between two coastal areas of Brazil
Provedor de dados: Zoologia
Autores: Lunardi,Diana G.; Engel,Márcia H.; Macedo,Regina H. F.
Behavior of humpback whales was observed during the reproductive period off the northern coast of the state of Bahia (NB, n = 378 groups) and at the Abrolhos Bank (AB, n = 919) to compare patterns and group composition between the two locations. Alone individuals and dyads were most often encountered in both areas, although mother-calf pairs were more common in AB. While these two regions comprise distinct concentrations of humpback whales, with intrinsic environmental differences, behavior patterns were quite similar. The only behavioral differences found where for "tail up" and "resting". The patterns found here may reflect differences in the protection status of the areas or intrinsic environmental differences.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abrolhos Bank; Bahia; Bayesian networks; Occidental South Atlantic; Reproductive season.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200001