Mine-hunting dolphins in the Navy’s Marine Mammal Systems (MMS) are likely to initially encounter targets on the edge of the maximum response axis (MRA) of the echolocation beam. Understanding how Fleet dolphins perform their search-and-report tasks will provide valuable information toward the enhancement of Navy mine countermeasure (MCM) signal processing approaches that utilize off-MRA acoust...

A mobile adhoc network is infrastructure-free and self configured network connected without wire. As it is infrastructure-free and no centralized control, such type of network are suitable only for conditional inter communication link. So initially maintaining Quality of Service and security aware routing is a difficult task. The main purpose of QoS aware routing is to find an optimal secure ro...

Vocalizations from the northern right whale dolphin, Lissodelphis borealis, were recorded during a combined visual and acoustic shipboard survey of cetacean populations off the west coast of the United States. Seven of twenty single-species schools of L. borealis produced click and pulsed vocalizations. No whistles were detected during any of the encounters. Clicks associated with burst-pulse v...

Echolocating bats and toothed whales probe their environment with ultrasonic sound pulses, using returning echoes to navigate and find prey in a process that appears to have resulted from a remarkable convergence of the two taxa. Here, we report the first detailed quantification of echolocation behaviour during prey capture in the most studied delphinid species, a false killer whale and a bottl...

To track highly directional echolocation clicks from odontocetes, passive hydrophone arrays with small apertures can be used to receive the same high frequency click on each sensor. A four-hydrophone small-aperture array was coupled to an autonomous acoustic recorder and used for long-term tracking of high-frequency odontocete sounds. The instrument was deployed in the spring of 2009 offshore o...

Understanding spatiotemporally varying animal distributions can inform ecological understanding of species' behavior (e.g., foraging and predator/prey interactions) support development management conservation measures. Data from an array echolocation-click detectors (C-PODs) were analyzed using Bayesian spatiotemporal modeling to investigate spatial temporal variation in occurrence activity har...

Encased in a streamlined, flooded housing, SoundTrap ST300HF hydrophone recording system was towed on voyages to South Georgia Island and the Sandwich Islands Antarctic Peninsula December 2019–February 2020. Recordings were analyzed identify acoustic detections of cetacean species. Acoustically identified species included sperm whales (Physeter macrocephalus), southern bottlenose (Hyperoodon pl...

cephalometric norms of mcnamara analysis have been studied in various populations due to their optimal efficiency. dolphin cephalometric software greatly enhances the conduction of this analysis for orthodontic measurements. however, dolphin is very expensive and cannot be afforded by many clinicians in developing countries. a suitable alternative software program in farsi/english will greatly ...