Whales
Mostrando 1-12 de 43 artigos, teses e dissertações.
-
1. Cetacean movements in coastal waters of the southwestern Atlantic ocean
Resumo: Cetáceos foram monitorados em cerca de 700 km da costa sudeste do Brasil (22°S a 25°S) entre 1995 e 2014 com o uso da fotoidentificação. O objetivo deste estudo foi de identificar quaisquer presenças de movimentos de longa distância de indivíduos das espécies monitoradas e discutir suas implicações. Dados de movimentos de longa distância
Biota Neotrop.. Publicado em: 21/03/2019
-
2. 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
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 t
Pap. Avulsos Zool.. Publicado em: 19/03/2018
-
3. Effective population size and the genetic consequences of commercial whaling on the humpback whales (Megaptera novaeangliae) from Southwestern Atlantic Ocean
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 diver
Genet. Mol. Biol.. Publicado em: 2018
-
4. Study on the polymorphism of POU1F1 gene in sheep
ABSTRACT In this study, POU1F1 gene polymorphism was detected in five sheep populations (large-tailed Han, small-tailed Han, Yuxi fat-tailed, Lanzhou large-tailed, and Mongolian sheep), using DNA pooling and sequencing, to provide theoretical basis for the breeding of excellent sheep varieties. Three single-nucleotide polymorphism (SNP) loci of POU1F1 gene w
R. Bras. Zootec.. Publicado em: 2016-10
-
5. Humpback whale Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae) group sizes in line transect ship surveys: An evaluation of observer errors
ABSTRACT Accurate estimates of group sizes through line transect sampling methods are important to correctly ascertain the abundance of animals that occur in groups. Since the average observed group size is a component of the distance sampling formula, bias in these data leads to biased abundance estimates. This study aimed to evaluate the potential errors i
Zoologia (Curitiba). Publicado em: 06/05/2016
-
6. Getting to know you: Identification of pygmy killer whales (Feresa attenuata) and melon-headed whales (Peponocephala electra) under challenging conditions
Resumo A orca-pigmeia (Feresa attenuata) era conhecida por poucos registros há não mais que 60 anos atrás, mas, apesar do número de registros ter crescido recentemente em todos os oceanos tropicais, F. attenuata é ainda considerada uma espécie pouco estudada. No Brasil, mesmo em base a um pequeno número de registros, presume-se sua distribuição como
Braz. j. oceanogr.. Publicado em: 2015-12
-
7. Bryde's whale (Cetartiodactyla: Balaenopteridae) occurrence and movements in coastal areas of southeastern Brazil
Bryde's whales, Balaenoptera edeni Anderson, 1879, were observed on 17 occasions (N = 21 surveys) in the coastal waters off Rio de Janeiro in southeastern Brazil during austral summer through autumn 2014. Five whales were individually identified using photo-identification techniques. The mean interval between resightings for all individuals was 12.8 days, wi
Zoologia (Curitiba). Publicado em: 2015-04
-
8. What do humpback whales Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae) pairs do after tagging?
The social structure of humpback whales in their tropical wintering grounds is very fluid. To date, no information has been published for cases in which two whales were both satellite-tagged while in association. Here, we report the movements of four humpback whale pairs tagged together off the coast of Brazil. Fieldwork and satellite tagging of humpback wha
Zoologia (Curitiba). Publicado em: 2014-04
-
9. Representatividade das Áreas Prioritárias e Protegidas nas zonas costeira e marinha brasileiras considerando os movimentos das baleias-jubarte, Megaptera novaeangliae (Borowski, 1781)
O estabelecimento de um sistema representativo de Áreas Protegidas é parte das estratégias de conservação das baleias-jubarte (Megaptera novaeangliae Borowski, 1781). Este estudo teve como objetivo avaliar a representatividade das Áreas Prioritárias para a Conservação (APCs) e das Unidades de Conservação (UCs) considerando os movimentos desta esp�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2012
-
10. Sightings of humpback whales on the Vitória-Trindade chain and around Trindade Island, Brazil
Braz. j. oceanogr.. Publicado em: 2012-09
-
11. Milk composition of franciscana dolphin (Pontoporia blainvillei) from Rio Grande do Sul, southern Brazil
Milk is the only external energy source for mammals in their early stages of life. Its composition varies during lactation in baleen whales and pinnipeds, while only descriptive studies are available for odontocetes. The aim of this work was to identify the components of the milk of franciscana, Pontoporia blainvillei, from southern Brazil. Samples were manu
Publicado em: 2011
-
12. Distribution and relative abundance of large whales in a former whaling ground off eastern South America
Ship-based sighting surveys for cetaceans were conducted in the former whaling ground off the northeastern coast of Brazil. The cruises took place in winter and spring of 1998-2001 with the objectives of investigating current distribution and abundance of cetaceans, particularly large whale species taken during whaling. In 1998 the survey were conducted betw
Zoologia (Curitiba). Publicado em: 2010-10