Results 41 to 50 of about 25,335 (235)

Behaviour and vocalizations of two sperm whales (Physeter macrocephalus) entangled in illegal driftnets in the Mediterranean Sea.

PLoS ONE, 2021
Illegal driftnetting causes each year several entanglements and deaths of sperm whales in different Mediterranean areas, primarily in the Tyrrhenian Sea.
Monica Francesca Blasi, Valentina Caserta, Chiara Bruno, Perla Salzeri, Agata Irene Di Paola, Alessandro Lucchetti   +5 more
doaj   +1 more source

Higher neuron densities in the cerebral cortex and larger cerebellums may limit dive times of delphinids compared to deep-diving toothed whales.

PLoS ONE, 2019
Since the work of Tower in the 1950s, we have come to expect lower neuron density in the cerebral cortex of larger brains. We studied dolphin brains varying from 783 to 6215g. As expected, average neuron density in four areas of cortex decreased from the
Sam H Ridgway, Robert H Brownson, Kaitlin R Van Alstyne, Robert A Hauser   +3 more
doaj   +1 more source

Notes on the brain and encephalization quotient of two sperm whales with a synthesis of the literature and indications of a new method of extraction

Natural History Sciences, 2014
The sperm whale (Physeter macrocephalus, Linnaeus 1758) possesses the largest brain that ever existed. Relatively few authors have dealt with it and the available descriptions are heterogeneous, with only few data about brain weight or gross anatomy.
Michele Povinelli, Mattia Panin, Sandro Mazzariol, Maristella Giurisato, Cristina Ballarin, Giulia Roncon, Michela Podestà, Massimo Demma, Bruno Cozzi   +8 more
doaj   +1 more source

Occurrence of sperm whale (Physeter macrocephalus) in the Russian Arctic

Polar Research, 2020
We report two sperm whale (Physeter macrocephalus) strandings observed in the south-east corner of the Barents Sea (i.e., Pechora Sea) in 2018, unusually far from the species’ hitherto known distribution.
Igor Popov, Götz Eichhorn
doaj   +1 more source

Audiograms and click spectra of seven novel and seldom-tested odontocetes

Frontiers in Marine Science, 2022
The use of auditory evoked potentials has been promoted as a means by which to collect audiometric information from odontocete cetaceans that are rarely encountered in stranding situations.
Dorian S. Houser, Lauren Noble, Erin Fougeres, Jason Mulsow, James J. Finneran   +4 more
doaj   +1 more source

Shipping routes through core habitat of endangered sperm whales along the Hellenic Trench, Greece: Can we reduce collision risks?

PLoS ONE, 2019
The Mediterranean sperm whale population is listed as 'Endangered". The Hellenic Trench is the core habitat of the eastern Mediterranean sperm whale sub-population that numbers two to three hundred individuals.
Alexandros Frantzis, Russell Leaper, Paraskevi Alexiadou, Aristides Prospathopoulos, Dimitrios Lekkas   +4 more
doaj   +1 more source

Acoustic Tracking of Sperm Whales (Physeter macrocephalus) in the Central Mediterranean Sea Using the NEMO-OνDE Deep-Sea Observatory

Journal of Marine Science and Engineering
Passive acoustic monitoring plays a critical role in the study of marine species, particularly in understanding the behavior of deep-diving endangered species like the Mediterranean sperm whale (Physeter macrocephalus).
Letizia Stella Di Mauro, Dídac Diego-Tortosa, Virginia Sciacca, Giorgio Riccobene, Salvatore Viola   +4 more
doaj   +1 more source

Dose response severity functions for acoustic disturbance in cetaceans using recurrent event survival analysis [PDF]

, 2015
This work was financially supported by the U. S. Office of Naval Research grant N00014‐12‐1‐0204, under the project “Multi‐study Ocean acoustics Human effects Analysis” (MOCHA). . L.
De Ruiter, Stacy Lynn, Harris, Catriona M, Kvadsheim, Petter, Lam, Frans-Peter, Miller, Patrick, Sadykova, Dinara, Thomas, Len, Tyack, Peter Lloyd   +7 more
core   +1 more source

Predicting ecology and hearing sensitivities in Parapontoporia—An extinct long‐snouted dolphin

The Anatomical Record, EarlyView.
Abstract Analyses of the cetacean (whale and dolphin) inner ear provide glimpses into the ecology and evolution of extinct and extant groups. The paleoecology of the long‐snouted odontocete (toothed whale) group, Parapontoporia, is primarily marine with its depositional context also suggesting freshwater tolerance.
Joyce Sanks, Rachel Racicot
wiley   +1 more source

An Unparalleled Sexual Dimorphism of Sperm Whale Encephalization [PDF]

, 2016
The sperm whale Physeter macrocephalus (Linnaeus, 1758) is the largest toothed whales and possesses the highest absolute values for brain weight on the planet (together with the killer whale Orcinus orca).
Cozzi, Bruno, Huggenberger, Stefan, Mazzariol, Sandro, Podest\ue0, Michela, Zotti, Alessandro   +4 more
core