Movements and Habitat Use of Dwarf and Pygmy Sperm Whales using Remotely-Deployed LIMPET Satellite Tags

2014 ◽  
Author(s):  
Robin W. Baird
Keyword(s):  
Habitat Use ◽  
Sperm Whales

scholarly journals Correcting Positional Errors in Shore-Based Theodolite Measurements of Animals at Sea

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Ophélie Sagnol ◽  
Femke Reitsma ◽  
Christoph Richter ◽  
Laurence H. Field
Keyword(s):  
New Zealand ◽  
Habitat Use ◽  
Marine Mammal ◽  
Positional Information ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
Vertical Angle ◽  
Position Accuracy ◽  
Wide Range ◽  
The Difference

Determining the position of animals at sea can be particularly difficult and yet, accurate range and position of animals at sea are essential to answer a wide range of biological questions. Shore-based theodolite techniques have been used in a number of studies to examine marine mammal movement patterns and habitat use, offering reliable position measurements. In this study we explored the accuracy of theodolite measurements by comparing positional information of the same objects using two independent techniques: a shore-based theodolite station and an onboard GPS over a range of 25 km from the shore-based station. The technique was developed to study the habitat use of sperm whales (Physeter macrocephalus) off Kaikoura, New Zealand. We observed that the position accuracy fell rapidly with an increase in range from the shore-based station. Results showed that the horizontal angle was accurately determined, but this was not the case for the vertical angle. We calibrated the position of objects at sea with a regression-based correction to fit the difference in distance between simultaneously recorded theodolite fixes and GPS positions. This approach revealed the necessity to calibrate theodolite measurements with objects at sea of known position.

scholarly journals Depredating sperm whales in the Gulf of Alaska: local habitat use and long distance movements across putative population boundaries

2014 ◽  
Vol 24 (2) ◽  
pp. 125-135 ◽  
Author(s):  
JM Straley ◽  
GS Schorr ◽  
AM Thode ◽  
J Calambokidis ◽  
CR Lunsford ◽  
...  
Keyword(s):  
Habitat Use ◽  
Gulf Of Alaska ◽  
Sperm Whales ◽  
Long Distance ◽  
Local Habitat

Fine‐scale habitat use of foraging sperm whales is driven by seafloor topography and water column structure

2021 ◽  
Author(s):  
Marta Guerra ◽  
Stephen M. Dawson ◽  
Tamlyn R. Somerford ◽  
Elizabeth Slooten ◽  
William J. Rayment
Keyword(s):  
Habitat Use ◽  
Water Column ◽  
Fine Scale ◽  
Sperm Whales ◽  
Seafloor Topography ◽  
Column Structure

Historical and contemporary habitat use of sperm whales around the Galápagos Archipelago: Implications for conservation

2020 ◽  
Author(s):  
Ana Eguiguren ◽  
Enrico Pirotta ◽  
Kristina Boerder ◽  
Maurício Cantor ◽  
Godfrey Merlen ◽  
...  
Keyword(s):  
Habitat Use ◽  
Sperm Whales ◽  
Galapagos Archipelago

Using stable isotopes to investigate foraging variation and habitat use of sperm whales from northern Peru

2017 ◽  
Vol 579 ◽  
pp. 201-212 ◽  
Author(s):  
JR Zupcic-Moore ◽  
RI Ruiz-Cooley ◽  
O Paliza ◽  
PL Koch ◽  
MD McCarthy
Keyword(s):  
Stable Isotopes ◽  
Habitat Use ◽  
Sperm Whales ◽  
Northern Peru

Population organisation in reef sharks: new variations in coastal habitat use by mobile marine predators

2016 ◽  
Vol 544 ◽  
pp. 197-211 ◽  
Author(s):  
A Chin ◽  
MR Heupel ◽  
CA Simpfendorfer ◽  
AJ Tobin
Keyword(s):  
Habitat Use ◽  
Coastal Habitat ◽  
Marine Predators ◽  
Reef Sharks

Habitat use of toothed whales in a marine protected area based on point process models

2019 ◽  
Vol 609 ◽  
pp. 239-256 ◽  
Author(s):  
TL Silva ◽  
G Fay ◽  
TA Mooney ◽  
J Robbins ◽  
MT Weinrich ◽  
...  
Keyword(s):  
Habitat Use ◽  
Point Process ◽  
Protected Area ◽  
Marine Protected Area ◽  
Process Models ◽  
Point Process Models

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.

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