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

scholarly journals Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses

Ibis ◽  
2020 ◽  
Author(s):  
William F. Mills ◽  
Rona A.R. McGill ◽  
Yves Cherel ◽  
Stephen C. Votier ◽  
Richard A. Phillips
Keyword(s):  
Stable Isotopes ◽  
Habitat Use ◽  
Intraspecific Variation ◽  
Trophic Level

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

scholarly journals Trophic relationships between sperm whales and jumbo squid using stable isotopes of C and N

2004 ◽  
Vol 277 ◽  
pp. 275-283 ◽  
Author(s):  
RI Ruiz-Cooley ◽  
D Gendron ◽  
S Aguíñiga ◽  
S Mesnick ◽  
JD Carriquiry
Keyword(s):  
Stable Isotopes ◽  
Trophic Relationships ◽  
Sperm Whales ◽  
Jumbo Squid ◽  
C And N

scholarly journals Pup Vibrissae Stable Isotopes Reveal Geographic Differences in Adult Female Southern Sea Lion Habitat Use during Gestation

PLoS ONE ◽  
2016 ◽  
Vol 11 (6) ◽  
pp. e0157394 ◽  
Author(s):  
Alastair M. M. Baylis ◽  
Gabriele J. Kowalski ◽  
Christian C. Voigt ◽  
Rachael A. Orben ◽  
Fritz Trillmich ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Habitat Use ◽  
Adult Female ◽  
Sea Lion ◽  
Geographic Differences
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