THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS
A bstract Fecal samples were collected while following sperm whales ( Physeter macrocephalus ) off the Galápagos Islands, Ecuador. They contained 133 upper beaks and 164 lower beaks of cephalopods. Analysis of the lower beaks suggests that the sperm whales fed primarily on three genera of cephalopod...
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crwiley:10.1111/j.1748-7692.2000.tb00927.x 2024-06-09T07:49:03+00:00 THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS Smith, Sean C. Whitehead, Hal 2000 http://dx.doi.org/10.1111/j.1748-7692.2000.tb00927.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2000.tb00927.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2000.tb00927.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 16, issue 2, page 315-325 ISSN 0824-0469 1748-7692 journal-article 2000 crwiley https://doi.org/10.1111/j.1748-7692.2000.tb00927.x 2024-05-16T14:23:05Z A bstract Fecal samples were collected while following sperm whales ( Physeter macrocephalus ) off the Galápagos Islands, Ecuador. They contained 133 upper beaks and 164 lower beaks of cephalopods. Analysis of the lower beaks suggests that the sperm whales fed primarily on three genera of cephalopods; Histioteutbis (62%), Ancistrocbeirus (16%), and Octopoteutbis (7%). The beak dimensions indicate that the cephalopods ranged in mantle length from 5 to 54 cm and in mass from 12 to 650 g. Fecal samples varied significantly between five study years and over different parts of the study area, but the number of beaks collected per sample did not correlate significantly with defecation rate (a measure of feeding success). Using beak material from fecal samples gives a biased estimate of sperm whale diet, reducing the frequencies of very small and very large cephalopods. However, all other available methods of assessing sperm whale diet also possess biases. Article in Journal/Newspaper Physeter macrocephalus Sperm whale Wiley Online Library The Beak ENVELOPE(-130.771,-130.771,56.466,56.466) Marine Mammal Science 16 2 315 325 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
A bstract Fecal samples were collected while following sperm whales ( Physeter macrocephalus ) off the Galápagos Islands, Ecuador. They contained 133 upper beaks and 164 lower beaks of cephalopods. Analysis of the lower beaks suggests that the sperm whales fed primarily on three genera of cephalopods; Histioteutbis (62%), Ancistrocbeirus (16%), and Octopoteutbis (7%). The beak dimensions indicate that the cephalopods ranged in mantle length from 5 to 54 cm and in mass from 12 to 650 g. Fecal samples varied significantly between five study years and over different parts of the study area, but the number of beaks collected per sample did not correlate significantly with defecation rate (a measure of feeding success). Using beak material from fecal samples gives a biased estimate of sperm whale diet, reducing the frequencies of very small and very large cephalopods. However, all other available methods of assessing sperm whale diet also possess biases. |
format |
Article in Journal/Newspaper |
author |
Smith, Sean C. Whitehead, Hal |
spellingShingle |
Smith, Sean C. Whitehead, Hal THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS |
author_facet |
Smith, Sean C. Whitehead, Hal |
author_sort |
Smith, Sean C. |
title |
THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS |
title_short |
THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS |
title_full |
THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS |
title_fullStr |
THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS |
title_full_unstemmed |
THE DIET OF GALÁPAGOS SPERM WHALES PHYSETER MACROCEPHALUS AS INDICATED BY FECAL SAMPLE ANALYSIS |
title_sort |
diet of galápagos sperm whales physeter macrocephalus as indicated by fecal sample analysis |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1111/j.1748-7692.2000.tb00927.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.2000.tb00927.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.2000.tb00927.x |
long_lat |
ENVELOPE(-130.771,-130.771,56.466,56.466) |
geographic |
The Beak |
geographic_facet |
The Beak |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_source |
Marine Mammal Science volume 16, issue 2, page 315-325 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-7692.2000.tb00927.x |
container_title |
Marine Mammal Science |
container_volume |
16 |
container_issue |
2 |
container_start_page |
315 |
op_container_end_page |
325 |
_version_ |
1801381155344220160 |