Consulta: subjectFacets:"Humpback whale"
Registros recuperados: 4
Data/hora: 10/06/2024 01:12:37

Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean
Provedor de dados: 74
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

Searching for humpback whales in a historical whaling hotspot of the Coral Sea, South Pacific
Provedor de dados: 5
Autores: Garrigue, C; Derville, S; Bonneville, C; Baker, Cs; Cheeseman, T; Millet, Laurent; Paton, D; Steel, D.
Humpback whales Megaptera novaeangliae were severely depleted by commercial whaling. Understanding key factors in their recovery is a crucial step for their conservation worldwide. In Oceania, the Chesterfield-Bellona archipelago was a primary whaling site in the 19th century, yet has been left almost unaffected by anthropogenic activities since. We present the results of the first multidisciplinary dedicated surveys in the archipelago assessing humpback whale populations 2 centuries post-whaling. We encountered 57 groups during 24 survey days (2016-2017), among which 35 whales were identified using photographs of natural markings (photo-ID), 38 using genotyping and 22 using both. Humpback whales were sparsely distributed (0.041 whales km-1): most...
Tipo: Text
Palavras-chave: Chesterfield-Bellona archipelago; Connectivity; Coral Sea; Habitat use; Humpback whale; Satellite tracking; Sex ratio; Whaling.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74454/74267.pdf

Migratory insights from singing humpback whales recorded around central New Zealand
Provedor de dados: 5
Autores: Warren, Victoria E.; Constantine, Rochelle; Noad, Michael; Garrigue, Claire; Garland, Ellen C.
The migration routes of wide-ranging species can be difficult to study, particularly at sea. In the western South Pacific, migratory routes of humpback whales between breeding and feeding areas are unclear. Male humpback whales sing a population-specific song, which can be used to match singers on migration to a breeding population. To investigate migratory routes and breeding area connections, passive acoustic recorders were deployed in the central New Zealand migratory corridor (2016); recorded humpback whale song was compared to song from the closest breeding populations of East Australia and New Caledonia (2015–2017). Singing northbound whales migrated past New Zealand from June to August via the east coast of the South Island and Cook Strait. Few song...
Tipo: Text
Palavras-chave: Passive acoustic monitoring; Cultural transmission; Humpback whale; Migration; Vocal learning.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00659/77150/78522.pdf

Stranded humpback whale (Megaptera novaeangliae) (Cetacea: Balaenopteridae) in Paraná River Delta, Buenos Aires Province, Argentina. Comments on the occurrence of marine mammals in the La Plata River Basin
Provedor de dados: 84
Autores: Lucero,Sergio O.; Gariboldi,María Constanza; Bauni,Valeria; Meluso,Juan Manuel; Castillo,Daniela del; Agnolin,Federico L.; Bogan,Sergio.
Abstract The humpback whale (Megaptera novaeangliae) is distributed among most oceans and seas of the globe (except Mediterranean Sea). These whales migrate from feeding regions in the Antarctic waters to breeding areas in tropical and subtropical seas. Here we report the stranding of a female young humpback whale, which was founded dead in the vicinity of the Talavera Island, in the Paraná River Delta, Buenos Aires Province, Argentina. From the analysis of mitochondrial cytochrome c oxidase subunit I gene sequences, two novel haplotypes were found, totalizing four haplotypes described for the species. In the La Plata River Basin this species was found only twice at the end of the XIX century. Thus, the new finding constitutes an important addition to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Megaptera novaeangliae; Humpback whale; Delta del Río Paraná; Haplotypes; Argentina.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100200