Results 21 to 30 of about 9,430 (204)

Perceptually Motivated Wavelet Packet Transform for Bioacoustic Signal Enhancement [PDF]

open access: yes, 2008
A significant and often unavoidable problem in bioacoustic signal processing is the presence of background noise due to an adverse recording environment. This paper proposes a new bioacoustic signal enhancement technique which can be used on a wide range
Cohen I.   +8 more
core   +2 more sources

The sero-prevalence of Toxoplasma gondii in British marine mammals

open access: yesMemorias do Instituto Oswaldo Cruz, 2009
Serum samples from 101 stranded or bycatch cetaceans from British waters were screened for Toxoplasma gondii-specific antibodies using the Sabin Feldman Dye Test.
Dan Forman   +3 more
doaj   +1 more source

Structure and Dynamics of Humpback Whales Competitive Groups in Ecuador [PDF]

open access: yesAnimal Behavior and Cognition, 2015
We assessed the social structure and behavior of humpback whale (Megaptera novaeangliae) competitive groups off Ecuador between July and August 2010. During this time we followed 185 whales in 22 competitive groups for 41.45 hr.
Fernando Félix, Johana Novillo
doaj   +1 more source

The enigmatic whale: the North Atlantic humpback

open access: yesNAMMCO Scientific Publications, 2009
We know more about the North Atlantic humpback whale (Megaptera novaeangliae) than we do for virtually any other cetacean, yet attempts to use this information to describe the status of the populations in this ocean basin have not proven satisfactory ...
Tim D Smith, Daniel G Pike
doaj   +1 more source

Impacts of Whale Watching on the Behavior of Humpback Whales (Megaptera novaeangliae) in the Coast of Panama

open access: yesFrontiers in Marine Science, 2020
Ecotourism focused on whales and dolphins has become a popular activity and an important source of revenue for many countries. Whale watching is vital to supporting conservation efforts and provides numerous benefits to local communities including ...
Arielle M. Amrein   +9 more
doaj   +1 more source

Direct numerical simulations of the flow around wings with spanwise waviness at a very low Reynolds number [PDF]

open access: yes, 2017
Inspired by the pectoral flippers of the humpback whale, the use of spanwise waviness in the leading edge has been considered in the literature as a possible way of improving the aerodynamic performance of wings.
Meneghini, JR, Serson, D, Sherwin, SJ
core   +1 more source

Influence of environmental parameters on movements and habitat utilization of humpback whales (Megaptera novaeangliae) in the Madagascar breeding ground [PDF]

open access: yes, 2016
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Royal Society Open Science 3 (2016): 160616, doi:10.1098/rsos.160616.Assessing the movement patterns ...
Acevedo-Gutiérrez A   +36 more
core   +5 more sources

Impact of unequal distances among acoustic sensors on cross-correlation based fisheries stock assessment technique

open access: yesScientific Reports, 2020
Cross-correlation based fisheries stock assessment technique utilized array of multiple acoustic sensors which were equidistant pair. However, at practical implementation of this technique, equal distances among acoustic sensors is sometimes challenging ...
Shaik Asif Hossain, Monir Hossen
doaj   +1 more source

Crustáceos ectoparásitos y epibiontes de ballenas jorobadas, Megaptera novaeangliae (Cetacea: Balaenopteridae) en el Pacífico colombiano

open access: yesCuadernos de investigación UNED, 2011
Se registran tres especies de crustáceos ectoparásitos y epibiontes en dos ballenatos y cuatro adultos de ballena jorobada (Megaptera novaeangliae) que visitaron el PNN Gorgona y Bahía Málaga en el Pacífico colombiano, en la temporada reproductiva del ...
Isabel Cristina Avila   +2 more
doaj   +1 more source

Acoustic Signaling by Singing Humpback Whales (Megaptera novaeangliae): What Role Does Reverberation Play? [PDF]

open access: yesPLoS ONE, 2016
When humpback whales (Megaptera novaeangliae) sing in coastal waters, the units they produce can generate reverberation. Traditionally, such reverberant acoustic energy has been viewed as an incidental side-effect of high-amplitude, long-distance, sound ...
Eduardo Mercado
doaj   +1 more source

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