scholarly journals False killer whale and short-finned pilot whale acoustic identification

2015 ◽  
Vol 28 (2) ◽  
pp. 97-108 ◽  
Author(s):  
S Baumann-Pickering ◽  
AE Simonis ◽  
EM Oleson ◽  
RW Baird ◽  
MA Roch ◽  
...  
Keyword(s):  
Killer Whale ◽  
Pilot Whale ◽  
False Killer Whale ◽  
Acoustic Identification

scholarly journals Cardiorespiratory coupling in cetaceans; a physiological strategy to improve gas exchange?

2020 ◽  
Vol 223 (17) ◽  
pp. jeb226365 ◽  
Author(s):  
Andreas Fahlman ◽  
Stefan Miedler ◽  
Luis Marti-Bonmati ◽  
Diana Ferrero Fernandez ◽  
Paola Muñoz Caballero ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Killer Whale ◽  
Bottlenose Dolphins ◽  
Beluga Whale ◽  
Cardiac Response ◽  
Delphinapterus Leucas ◽  
Pilot Whale ◽  
Terrestrial Mammals ◽  
False Killer Whale ◽  
Cardiorespiratory Coupling

ABSTRACTIn the current study we used transthoracic echocardiography to measure stroke volume (SV), heart rate (fH) and cardiac output (CO) in adult bottlenose dolphins (Tursiops truncatus), a male beluga whale calf [Delphinapterus leucas, body mass (Mb) range: 151–175 kg] and an adult female false killer whale (Pseudorca crassidens, estimated Mb: 500–550 kg) housed in managed care. We also recorded continuous electrocardiogram (ECG) in the beluga whale, bottlenose dolphin, false killer whale, killer whale (Orcinus orca) and pilot whale (Globicephala macrorhynchus) to evaluate cardiorespiratory coupling while breathing spontaneously under voluntary control. The results show that cetaceans have a strong respiratory sinus arrythmia (RSA), during which both fH and SV vary within the interbreath interval, making average values dependent on the breathing frequency (fR). The RSA-corrected fH was lower for all cetaceans compared with that of similarly sized terrestrial mammals breathing continuously. As compared with terrestrial mammals, the RSA-corrected SV and CO were either lower or the same for the dolphin and false killer whale, while both were elevated in the beluga whale. When plotting fR against fH for an inactive mammal, cetaceans had a greater cardiac response to changes in fR as compared with terrestrial mammals. We propose that these data indicate an important coupling between respiration and cardiac function that enhances gas exchange, and that this RSA is important to maximize gas exchange during surface intervals, similar to that reported in the elephant seal.

scholarly journals A Case of Chronic Purulent Pneumonia in False Killer Whale (Pseudorca crassidens)

2005 ◽  
Vol 10 (2) ◽  
pp. 117-122 ◽  
Author(s):  
Fumio TERASAWA ◽  
Kimimasa TAKAHASHI ◽  
Isao OHSHITA ◽  
Masakazu KITAMURA
Keyword(s):  
Killer Whale ◽  
False Killer Whale ◽  
Pseudorca Crassidens

scholarly journals Transmission beam pattern of a false killer whale

1993 ◽  
Vol 93 (4) ◽  
pp. 2358-2359 ◽  
Author(s):  
Whitlow W. L. Au ◽  
Jeffrey L. Pawloski ◽  
Ted W. Cranford ◽  
Robert C. Gisner ◽  
Paul E. Nachtigall
Keyword(s):  
Killer Whale ◽  
Beam Pattern ◽  
False Killer Whale

scholarly journals Active echolocation beam focusing in the false killer whale, Pseudorca crassidens

2012 ◽  
Vol 215 (8) ◽  
pp. 1306-1312 ◽  
Author(s):  
L. N. Kloepper ◽  
P. E. Nachtigall ◽  
M. J. Donahue ◽  
M. Breese
Keyword(s):  
Killer Whale ◽  
Beam Focusing ◽  
False Killer Whale ◽  
Pseudorca Crassidens

scholarly journals Evolutionary characterization of a highly repetitive sequence identified from the false killer whale (Pseudorca crassidens)

2009 ◽  
Vol 84 (2) ◽  
pp. 185-189
Author(s):  
Dae-Won Kim ◽  
Aram Kang ◽  
Sang-Haeng Choi ◽  
Zang Geun Kim ◽  
Woo-Jin Kim ◽  
...  
Keyword(s):  
Repetitive Sequence ◽  
Killer Whale ◽  
False Killer Whale ◽  
Pseudorca Crassidens

scholarly journals Using line acceleration to measure false killer whale (Pseudorca crassidens) click and whistle source levels during pelagic longline depredation

2016 ◽  
Vol 140 (5) ◽  
pp. 3941-3951 ◽  
Author(s):  
Aaron Thode ◽  
Lauren Wild ◽  
Janice Straley ◽  
Dustin Barnes ◽  
Ali Bayless ◽  
...  
Keyword(s):  
Killer Whale ◽  
False Killer Whale ◽  
Pseudorca Crassidens ◽  
Pelagic Longline

scholarly journals Finding of a skull of Pseudorca crassidens in Caleta de Los Loros, Rio Negro Province, Argentina

2015 ◽  
Vol 10 (1) ◽  
pp. 65-67 ◽  
Author(s):  
Raimundo Lucas Bustos ◽  
Maria Fernanda Negri ◽  
Gustavo Adolfo Daneri ◽  
Esperanza Amalia Varela ◽  
Marcos Luna
Keyword(s):  
Intertidal Zone ◽  
New Record ◽  
Present Note ◽  
Killer Whale ◽  
Low Frequency ◽  
South American ◽  
Sea Lions ◽  
Rio Negro ◽  
False Killer Whale ◽  
Pseudorca Crassidens

The false killer whale, Pseudorca crassidens, exhibits one of the widest and most continuous distributions among cetaceans. However, basic information about its biology is poorly known due to the low frequency of sightings and its offshore habits. Moreover, most of the knowledge on this species has been obtained from stranded animals. On 3 March 2012, in the proximity of a colony of South American sea lions (Otaria flavescens) located at Caleta de los Loros, Río Negro Province, Argentina (40o59’S, 64o14’W), a cetacean skull was found in the intertidal zone. The specimen was later identified as P. crassidens. The present note reports a new record of false killer whale in the continental shelf waters of Argentina and provides new data on the distribution and skull morphometrics of the species.

scholarly journals The abundance of false killer whale, Pseudorca crassidens (Artiodactyla: Delphinidae) in coastal waters of Golfo Dulce and Osa Peninsula, Costa Rica

2020 ◽  
Vol 68 (2) ◽  
Author(s):  
Erika Sánchez Robledo ◽  
Lenin Enrique Oviedo Correa ◽  
David Herra-Miranda ◽  
Juan Diego Pacheco-Polanco ◽  
Sierra Goodman ◽  
...  
Keyword(s):  
Costa Rica ◽  
Population Size ◽  
Killer Whale ◽  
Small Population ◽  
Killer Whales ◽  
Apparent Survival ◽  
Osa Peninsula ◽  
Small Population Size ◽  
False Killer Whale ◽  
Pseudorca Crassidens

Introduction: False killer whale (Pseudorca crassidens) is a tropical and subtropical social species that live in groups with individuals of mixed ages and sex classes. False killer whales have been documented since the late 1990s in Southwestern Costa Rica. Objective: To estimate the abundance of false killer whales in Osa Peninsula waters. Methods: Cetacean surveys off the Osa Peninsula Waters (OPW), Costa Rica, yielded opportunistic encounters with false killer whales in Drake Bay and Caño Island (2001-2015) and observations during formal surveys in Golfo Dulce (2005-2015). Photo-identification data was analyzed using capture-mark-recapture models in the study area, through an open population (POPAN) framework, considering the effect of time on the parameters apparent survival and capture probability, producing an abundance estimate for a superpopulation in the entire study area. Results: False killer whale abundance in OPW is characterized by a small population size of no more than 100 individuals, complemented by a very low probability of encounter and a contrasting high apparent survival. Conclusions: This population estimate should be taken as conservative, however, the small population size of less than 100 individuals should be considered vulnerable, in contrast to the increasing anthropogenic impacts in the coastal seascape. We argue the potential occurrence of population units along the coastal seascape of the Pacific littoral and oceanic island-associated units at Isla del Coco.

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