Artigo

Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)

This study aimed to characterize the distribution of botos, Inia geoffrensis, along a 530 km stretch in the middle reaches of the Araguaia River (central Brazil). Data collection was conducted in May (lowering water season) and September (dry season) of 2009. The location and group size of botos wer...

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Autor principal: Araújo, Claryana Costa
Outros Autores: Silva, Vera Maria Ferreira da
Grau: Artigo
Idioma: English
Publicado em: Mammalia 2020
Assuntos:
Dolphin
Group Size
Habitat Management
Human Activity
Population Density
Spatial Distribution
Tourist Behavior
Araguaia River
Brasil
Inia Geoffrensis
Iniidae
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/17690
id oai:repositorio:1-17690
recordtype dspace
spelling oai:repositorio:1-17690 Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil) Araújo, Claryana Costa Silva, Vera Maria Ferreira da Dolphin Group Size Habitat Management Human Activity Population Density Spatial Distribution Tourist Behavior Araguaia River Brasil Inia Geoffrensis Iniidae This study aimed to characterize the distribution of botos, Inia geoffrensis, along a 530 km stretch in the middle reaches of the Araguaia River (central Brazil). Data collection was conducted in May (lowering water season) and September (dry season) of 2009. The location and group size of botos were recorded, and the relative density was calculated. The river was divided into nine areas according to geomorphological features; these areas were later grouped into two (low and high) levels of sediment input. The study area was categorized into six types of shoreline habitats: vegetated bank, non-vegetated bank, beach, confluence, bay, and island. A total of 195 sightings (239 botos) were recorded, with the highest density of sightings found in habitats in which tributaries entered the Araguaia River (confluence) followed by the bay habitat. The group size varied from one to three individuals, and single individuals were predominant. The segment with high sediment input also had a higher density of botos compared with the low-sediment segment. Botos-preferred habitats and human activities have a great overlap in Araguaia River. Restrictions of certain human activities, and tourism management would reduce both the intentional and accidental harm of botos in the Araguaia River. 2020-06-15T21:48:49Z 2020-06-15T21:48:49Z 2014 Artigo https://repositorio.inpa.gov.br/handle/1/17690 10.1515/mammalia-2013-0112 en Volume 78, Número 4, Pags. 481-486 Restrito Mammalia
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Dolphin
Group Size
Habitat Management
Human Activity
Population Density
Spatial Distribution
Tourist Behavior
Araguaia River
Brasil
Inia Geoffrensis
Iniidae
spellingShingle Dolphin
Group Size
Habitat Management
Human Activity
Population Density
Spatial Distribution
Tourist Behavior
Araguaia River
Brasil
Inia Geoffrensis
Iniidae
Araújo, Claryana Costa
Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)
topic_facet Dolphin
Group Size
Habitat Management
Human Activity
Population Density
Spatial Distribution
Tourist Behavior
Araguaia River
Brasil
Inia Geoffrensis
Iniidae
description This study aimed to characterize the distribution of botos, Inia geoffrensis, along a 530 km stretch in the middle reaches of the Araguaia River (central Brazil). Data collection was conducted in May (lowering water season) and September (dry season) of 2009. The location and group size of botos were recorded, and the relative density was calculated. The river was divided into nine areas according to geomorphological features; these areas were later grouped into two (low and high) levels of sediment input. The study area was categorized into six types of shoreline habitats: vegetated bank, non-vegetated bank, beach, confluence, bay, and island. A total of 195 sightings (239 botos) were recorded, with the highest density of sightings found in habitats in which tributaries entered the Araguaia River (confluence) followed by the bay habitat. The group size varied from one to three individuals, and single individuals were predominant. The segment with high sediment input also had a higher density of botos compared with the low-sediment segment. Botos-preferred habitats and human activities have a great overlap in Araguaia River. Restrictions of certain human activities, and tourism management would reduce both the intentional and accidental harm of botos in the Araguaia River.
format Artigo
author Araújo, Claryana Costa
author2 Silva, Vera Maria Ferreira da
author2Str Silva, Vera Maria Ferreira da
title Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)
title_short Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)
title_full Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)
title_fullStr Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)
title_full_unstemmed Spatial distribution of river dolphins, Inia geoffrensis (Iniidae), in the Araguaia River (central Brazil)
title_sort spatial distribution of river dolphins, inia geoffrensis (iniidae), in the araguaia river (central brazil)
publisher Mammalia
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/17690
_version_ 1787142603824693248
score 11.755432

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