Habitat preference and behaviour of the Guiana dolphin (Sotalia guianensis) in a well-preserved estuary off Southern Brazil

Carolina A. Bonin, Eric A. Lewallen, Andre J van Wijnen, Marta Jussara Cremer, Paulo C. Simões-Lopes

Research output: Contribution to journalArticle

Abstract

Recent extinctions of coastal dolphin species indicate that marine mammal populations are susceptible to rapid decline. Yet, effective conservation efforts depend on population-level ecological data. To obtain principal baseline data that will inform management efforts, we characterized the habitat and recorded the behaviour of a Guiana dolphin (Sotalia guianensis) population within one of the most well-preserved estuaries off southern Brazil. Monthly surveys were conducted for one year (August 1999 - July 2000) within an area of approximately 100 km2, within the Paranaguá Bay Estuary. We employed the group follow protocol, which resulted in 260 h of direct observation. Our results revealed feeding as the most frequent activity in the estuary, totaling nearly two thirds of all records. We also identified two sites of Guiana dolphin habitat preference in our study area, where sightings remarkably totalled > 62% of observation records. These sites (especially Guaraqueçaba Bay) were not only important for feeding, but also for S. guianensis socialization. The detection of these key areas should facilitate both local and broad-scale efforts to preserve critical habitats for this population of dolphins, and by extension may help inform management plans for ecologically vulnerable S. guianensis populations in other parts of their distribution.

Original languageEnglish (US)
Pages (from-to)2235-2242
Number of pages8
JournalPakistan Journal of Zoology
Volume49
Issue number6
DOIs
StatePublished - Jan 1 2017

Fingerprint

dolphins
habitat preferences
estuaries
Brazil
marine mammals
habitats
preserves
extinction
Sotalia guianensis

Keywords

  • Cetaceans
  • Conservation
  • Ecology
  • Estuarine
  • Population

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Habitat preference and behaviour of the Guiana dolphin (Sotalia guianensis) in a well-preserved estuary off Southern Brazil. / Bonin, Carolina A.; Lewallen, Eric A.; van Wijnen, Andre J; Cremer, Marta Jussara; Simões-Lopes, Paulo C.

In: Pakistan Journal of Zoology, Vol. 49, No. 6, 01.01.2017, p. 2235-2242.

Research output: Contribution to journalArticle

Bonin, Carolina A. ; Lewallen, Eric A. ; van Wijnen, Andre J ; Cremer, Marta Jussara ; Simões-Lopes, Paulo C. / Habitat preference and behaviour of the Guiana dolphin (Sotalia guianensis) in a well-preserved estuary off Southern Brazil. In: Pakistan Journal of Zoology. 2017 ; Vol. 49, No. 6. pp. 2235-2242.
@article{cb07394a6fb54318bce74125dcba3325,
title = "Habitat preference and behaviour of the Guiana dolphin (Sotalia guianensis) in a well-preserved estuary off Southern Brazil",
abstract = "Recent extinctions of coastal dolphin species indicate that marine mammal populations are susceptible to rapid decline. Yet, effective conservation efforts depend on population-level ecological data. To obtain principal baseline data that will inform management efforts, we characterized the habitat and recorded the behaviour of a Guiana dolphin (Sotalia guianensis) population within one of the most well-preserved estuaries off southern Brazil. Monthly surveys were conducted for one year (August 1999 - July 2000) within an area of approximately 100 km2, within the Paranagu{\'a} Bay Estuary. We employed the group follow protocol, which resulted in 260 h of direct observation. Our results revealed feeding as the most frequent activity in the estuary, totaling nearly two thirds of all records. We also identified two sites of Guiana dolphin habitat preference in our study area, where sightings remarkably totalled > 62{\%} of observation records. These sites (especially Guaraque{\cc}aba Bay) were not only important for feeding, but also for S. guianensis socialization. The detection of these key areas should facilitate both local and broad-scale efforts to preserve critical habitats for this population of dolphins, and by extension may help inform management plans for ecologically vulnerable S. guianensis populations in other parts of their distribution.",
keywords = "Cetaceans, Conservation, Ecology, Estuarine, Population",
author = "Bonin, {Carolina A.} and Lewallen, {Eric A.} and {van Wijnen}, {Andre J} and Cremer, {Marta Jussara} and Sim{\~o}es-Lopes, {Paulo C.}",
year = "2017",
month = "1",
day = "1",
doi = "10.17582/journal.pjz/2017.49.6.2235.2242",
language = "English (US)",
volume = "49",
pages = "2235--2242",
journal = "Pakistan Journal of Zoology",
issn = "0030-9923",
publisher = "University of Punjab (new Campus)",
number = "6",

}

TY - JOUR

T1 - Habitat preference and behaviour of the Guiana dolphin (Sotalia guianensis) in a well-preserved estuary off Southern Brazil

AU - Bonin, Carolina A.

AU - Lewallen, Eric A.

AU - van Wijnen, Andre J

AU - Cremer, Marta Jussara

AU - Simões-Lopes, Paulo C.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Recent extinctions of coastal dolphin species indicate that marine mammal populations are susceptible to rapid decline. Yet, effective conservation efforts depend on population-level ecological data. To obtain principal baseline data that will inform management efforts, we characterized the habitat and recorded the behaviour of a Guiana dolphin (Sotalia guianensis) population within one of the most well-preserved estuaries off southern Brazil. Monthly surveys were conducted for one year (August 1999 - July 2000) within an area of approximately 100 km2, within the Paranaguá Bay Estuary. We employed the group follow protocol, which resulted in 260 h of direct observation. Our results revealed feeding as the most frequent activity in the estuary, totaling nearly two thirds of all records. We also identified two sites of Guiana dolphin habitat preference in our study area, where sightings remarkably totalled > 62% of observation records. These sites (especially Guaraqueçaba Bay) were not only important for feeding, but also for S. guianensis socialization. The detection of these key areas should facilitate both local and broad-scale efforts to preserve critical habitats for this population of dolphins, and by extension may help inform management plans for ecologically vulnerable S. guianensis populations in other parts of their distribution.

AB - Recent extinctions of coastal dolphin species indicate that marine mammal populations are susceptible to rapid decline. Yet, effective conservation efforts depend on population-level ecological data. To obtain principal baseline data that will inform management efforts, we characterized the habitat and recorded the behaviour of a Guiana dolphin (Sotalia guianensis) population within one of the most well-preserved estuaries off southern Brazil. Monthly surveys were conducted for one year (August 1999 - July 2000) within an area of approximately 100 km2, within the Paranaguá Bay Estuary. We employed the group follow protocol, which resulted in 260 h of direct observation. Our results revealed feeding as the most frequent activity in the estuary, totaling nearly two thirds of all records. We also identified two sites of Guiana dolphin habitat preference in our study area, where sightings remarkably totalled > 62% of observation records. These sites (especially Guaraqueçaba Bay) were not only important for feeding, but also for S. guianensis socialization. The detection of these key areas should facilitate both local and broad-scale efforts to preserve critical habitats for this population of dolphins, and by extension may help inform management plans for ecologically vulnerable S. guianensis populations in other parts of their distribution.

KW - Cetaceans

KW - Conservation

KW - Ecology

KW - Estuarine

KW - Population

UR - http://www.scopus.com/inward/record.url?scp=85038351842&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85038351842&partnerID=8YFLogxK

U2 - 10.17582/journal.pjz/2017.49.6.2235.2242

DO - 10.17582/journal.pjz/2017.49.6.2235.2242

M3 - Article

VL - 49

SP - 2235

EP - 2242

JO - Pakistan Journal of Zoology

JF - Pakistan Journal of Zoology

SN - 0030-9923

IS - 6

ER -