Shallow‐water habitat use and population parameters of rough‐toothed dolphins, Steno bredanensis ( G. Cuvier in Lesson, 1828) in southeastern Brazil

2020 ◽  
Author(s):  
Rafael R. Carvalho ◽  
José Lailson‐Brito ◽  
Maja Kajin ◽  
Carlos Eduardo P. Quintana ◽  
Karina S. Pereira ◽  
...  
Keyword(s):  
Habitat Use ◽  
Shallow Water ◽  
Southeastern Brazil ◽  
Population Parameters ◽  
Steno Bredanensis

Modeling cetacean habitat use in an urban coastal area in southeastern Brazil

2020 ◽  
Vol 642 ◽  
pp. 227-240
Author(s):  
L Lodi ◽  
R Tardin ◽  
G Maricato
Keyword(s):  
Habitat Use ◽  
Protected Areas ◽  
Linear Models ◽  
Anthropogenic Activities ◽  
Buffer Zone ◽  
Humpback Whales ◽  
Southeastern Brazil ◽  
Major Influence ◽  
Cetacean Species ◽  
Few Data

Most studies of cetacean habitat use do not consider the influence of anthropogenic activities. We investigated the influence of environmental and anthropogenic variables on habitat use by humpback Megaptera novaeangliae and Bryde’s whales Balaenoptera brydei off the coast of the Brazilian city of Rio de Janeiro. Although there are 2 marine protected areas (MPAs) in this area, few data are available on cetacean habitat use or on the overlap of different cetacean species within these MPAs. Our aim was to evaluate the effectiveness of the MPAs and propose a buffer zone to better protect the biodiversity of the study area. We conducted systematic surveys and developed spatial eigenvector generalized linear models to characterize habitat use by the species in the study area. Habitat use by humpback whales was influenced only by depth, whereas for Bryde’s whales there was the additional influence of anthropogenic variables. For Bryde’s whales, which use the area for feeding, sea surface temperature and the distance to anchorages had a major influence on habitat use. We also showed that neither of the MPAs in the study area adequately protects the hotspots of either whale species. Most of the humpback whale grid cells with high sighting predictions were located within 2 km of the MPAs, while areas of high sighting prediction of Bryde’s whales were located up to 5 km from the MPAs, closer to beaches. Our findings provide important insights for the delimitation of protected areas and zoning of the MPAs.

scholarly journals Habitat partitioning, habits and convergence among coastal nektonic fish species from the São Sebastião Channel, southeastern Brazil

2010 ◽  
Vol 8 (2) ◽  
pp. 299-310 ◽  
Author(s):  
Fernando Zaniolo Gibran
Keyword(s):  
Habitat Use ◽  
Fish Species ◽  
Body Shape ◽  
Scientific Literature ◽  
Morphological Diversity ◽  
The Body ◽  
Divergent Evolution ◽  
Southeastern Brazil ◽  
Ecological Performance ◽  
Intimate Link

Based on a fish survey and preliminary underwater observations, 17 "morphotypes" were identified that characterize the morphological diversity found within 27 nektonic fish species sampled at São Sebastião Channel. Such "morphotypes" were studied using an ecomorphological approach, with the intention to investigate similarities and differences in shape and habits. Underwater field observations were also performed, to verify if the lifestyle of these species, such as vertical occupation of the water column and the habitat use, are in accordance with their distribution in the morphospace. The results, complemented with data from scientific literature on the taxonomy and phylogenies of these species, allowed discussing some of the typical cases of convergent and divergent evolution. Some of the ecomorphological clusters had no phylogenetic support although this is probably due to the environmental conditions in which theirs members have evolved. The body shape and fins positions of a fish clearly influence its ecological performance and habitat use, corroborating the ecomorphological hypothesis on the intimate link between phenotype and ecology.

Total and subcellular Ti distribution and detoxification processes in Pontoporia blainvillei and Steno bredanensis dolphins from Southeastern Brazil

2020 ◽  
Vol 153 ◽  
pp. 110975 ◽  
Author(s):  
Fernanda Monteiro ◽  
Leila S. Lemos ◽  
Jailson Fulgêncio de Moura ◽  
Rafael Christian Chávez Rocha ◽  
Isabel Moreira ◽  
...  
Keyword(s):  
Southeastern Brazil ◽  
Steno Bredanensis ◽  
Pontoporia Blainvillei

scholarly journals Population dynamics of Pseudevadne tergestina (Branchiopoda: Onychopoda) in Guanabara Bay, Brazil

2004 ◽  
Vol 47 (5) ◽  
pp. 713-723 ◽  
Author(s):  
Andrea Marazzo ◽  
Jean Louis Valentin
Keyword(s):  
Population Dynamics ◽  
Death Rate ◽  
Birth Rate ◽  
Development Time ◽  
Resting Eggs ◽  
Temporal Variations ◽  
Southeastern Brazil ◽  
Guanabara Bay ◽  
Population Parameters ◽  
Horizontal Transport

Populations of Pseudevadne tergestina were studied in Guanabara Bay, southeastern Brazil, to assess temporal variations in density and population dynamics. Data on temperature, salinity and zooplankton samples were taken from the superficial water of a fixed station, every 3 - 4 days, from February 2 through August 1, 2000. The highest abundance of this species was observed in March, when densities varied widely, from 20 to 600 ind. m-3. Population parameters were calculated, such as birth rate (from 0.25 to 0.90 ind.-1.day-1), growth rate (from -1.30 to 2.09 day-1 ) and death rate ( from -1.6 to 1.9 day-1 ) Start of population could be attributed to the increase of temperature and to the hatching of resting eggs. The population collapsed in fall-winter, as result from the combined effects of different factors: decrease of water temperature (from 27ºC to 21ºC) influencing egg development time (from 2.27 to 3.28 days); predation pressure by chaetognaths (Max. 100 ind. m-3 ) and switch of population from parthenogenic to sexual reproduction. Horizontal transport of water by tidal currents contributed partially to the reduction of population density.

Burst-pulsed sounds of rough-toothed dolphins (Steno bredanensis) in Southeastern Brazil

2020 ◽  
Vol 148 (4) ◽  
pp. 2596-2596
Author(s):  
Isabela M. Lima ◽  
Mariana Barbosa ◽  
Tatiana Bisi ◽  
José Lailson-Brito ◽  
Alexandre Azevedo
Keyword(s):  
Southeastern Brazil ◽  
Steno Bredanensis

Environment and anthropogenic activities influence cetacean habitat use in southeastern Brazil

2019 ◽  
Vol 616 ◽  
pp. 197-210 ◽  
Author(s):  
RH Tardin ◽  
Y Chun ◽  
CN Jenkins ◽  
IS Maciel ◽  
SM Simão ◽  
...  
Keyword(s):  
Habitat Use ◽  
Anthropogenic Activities ◽  
Southeastern Brazil

Rough-Toothed Dolphins (Steno bredanensis) Along Southeastern Brazil: Report of an Anomalous Pigmented Juvenile and Description of Social and Feeding Behaviors

2019 ◽  
Vol 45 (1) ◽  
pp. 30-36 ◽  
Author(s):  
Júlio Cardoso ◽  
Arlaine Francisco ◽  
Shirley P. de Souza ◽  
Salvatore Siciliano
Keyword(s):  
Southeastern Brazil ◽  
Feeding Behaviors ◽  
Steno Bredanensis

Raspailia (Raspaxilla) bouryesnaultae, a new name for Brazilian Raspaxilla elegans Boury-Esnault, 1973 (Demospongiae, Poecilosclerida, Raspailiidae) with a redescription and a new record

Zootaxa ◽  
2006 ◽  
Vol 1129 (1) ◽  
pp. 37 ◽  
Author(s):  
CLÉA LERNER ◽  
JOÃO L. CARRARO ◽  
ROB VAN SOEST
Keyword(s):  
Shallow Water ◽  
New Record ◽  
Southeastern Brazil ◽  
Santa Catarina ◽  
Additional Material ◽  
New Name ◽  
Shallow Water Species ◽  
Water Species ◽  
Santa Catarina State

The combination Raspailia (Raspaxilla) elegans sensu Boury-Esnault, 1973 is precoccupied by Raspailia elegans Lendenfeld,1887 (Porifera, Poecilosclerida, Raspailiidae). A new name for this Brazilian shallow-water species is proposed, Raspailia (Raspaxilla) bouryesnaultae n.n., and the species is redescribed based on a skeleton slide from the holotype and additional material freshly collected from the coast of Santa Catarina state. The distribution is now expanded to encompass the area from 22º to 27°S, in southeastern Brazil.

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