Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil?
Abstract Santa Catarina State, in southern Brazil, is an important breeding ground for the southern right whale and it is possible to record mother‐calf pairs and unaccompanied adults that migrate to this coast to either give birth, mate, or socialize. From the geographical position of the sightings...
Published in: | Marine Mammal Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/mms.12797 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12797 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12797 |
id |
crwiley:10.1111/mms.12797 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/mms.12797 2024-09-15T18:37:29+00:00 Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? Renault‐Braga, Eduardo P. Groch, Karina R. Simões‐Lopes, Paulo C. 2021 http://dx.doi.org/10.1111/mms.12797 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12797 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12797 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 37, issue 3, page 1008-1021 ISSN 0824-0469 1748-7692 journal-article 2021 crwiley https://doi.org/10.1111/mms.12797 2024-08-27T04:28:31Z Abstract Santa Catarina State, in southern Brazil, is an important breeding ground for the southern right whale and it is possible to record mother‐calf pairs and unaccompanied adults that migrate to this coast to either give birth, mate, or socialize. From the geographical position of the sightings, spatial segregation was evaluated between mother‐calf pairs and unaccompanied whales. Using GAM, we analyzed 15 years of aerial survey data from 2003 to 2018. The study area (780 km 2 ) was divided into 500 × 500 m grid cells. Whale count per grid cell was modeled using a set of explanatory variables. The explanatory variables of latitude, coast distance, seabed, and maximum SST were selected for both classes. However, coast type was also selected for unaccompanied whales, while coast linearity and bathymetric slope were additionally selected for mother‐calf pairs. The response curves fitted by models indicated a certain degree of spatial segregation, by which mother‐calf pairs remained closer to the coast, where the curve peak is reached at 500 m from the coast, compared to unaccompanied whales where the curve peaked near 1,000 m from the coast. Also, unaccompanied whales more frequently appeared in the southern boundaries of the study area, at latitudes south from 28.4°S. Article in Journal/Newspaper Southern Right Whale Wiley Online Library Marine Mammal Science 37 3 1008 1021 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Santa Catarina State, in southern Brazil, is an important breeding ground for the southern right whale and it is possible to record mother‐calf pairs and unaccompanied adults that migrate to this coast to either give birth, mate, or socialize. From the geographical position of the sightings, spatial segregation was evaluated between mother‐calf pairs and unaccompanied whales. Using GAM, we analyzed 15 years of aerial survey data from 2003 to 2018. The study area (780 km 2 ) was divided into 500 × 500 m grid cells. Whale count per grid cell was modeled using a set of explanatory variables. The explanatory variables of latitude, coast distance, seabed, and maximum SST were selected for both classes. However, coast type was also selected for unaccompanied whales, while coast linearity and bathymetric slope were additionally selected for mother‐calf pairs. The response curves fitted by models indicated a certain degree of spatial segregation, by which mother‐calf pairs remained closer to the coast, where the curve peak is reached at 500 m from the coast, compared to unaccompanied whales where the curve peaked near 1,000 m from the coast. Also, unaccompanied whales more frequently appeared in the southern boundaries of the study area, at latitudes south from 28.4°S. |
format |
Article in Journal/Newspaper |
author |
Renault‐Braga, Eduardo P. Groch, Karina R. Simões‐Lopes, Paulo C. |
spellingShingle |
Renault‐Braga, Eduardo P. Groch, Karina R. Simões‐Lopes, Paulo C. Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? |
author_facet |
Renault‐Braga, Eduardo P. Groch, Karina R. Simões‐Lopes, Paulo C. |
author_sort |
Renault‐Braga, Eduardo P. |
title |
Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? |
title_short |
Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? |
title_full |
Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? |
title_fullStr |
Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? |
title_full_unstemmed |
Is there spatial segregation between reproductive groups of southern right whales along the coastline of southern Brazil? |
title_sort |
is there spatial segregation between reproductive groups of southern right whales along the coastline of southern brazil? |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/mms.12797 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12797 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12797 |
genre |
Southern Right Whale |
genre_facet |
Southern Right Whale |
op_source |
Marine Mammal Science volume 37, issue 3, page 1008-1021 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mms.12797 |
container_title |
Marine Mammal Science |
container_volume |
37 |
container_issue |
3 |
container_start_page |
1008 |
op_container_end_page |
1021 |
_version_ |
1810481860595154944 |