<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Peixoto, Silvio</style></author><author><style face="normal" font="default" size="100%">Soares, Roberta</style></author><author><style face="normal" font="default" size="100%">Silva, José Filipe</style></author><author><style face="normal" font="default" size="100%">Hamilton, Santiago</style></author><author><style face="normal" font="default" size="100%">Morey, Amit</style></author><author><style face="normal" font="default" size="100%">Davis, D. Allen</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Acoustic activity of Litopenaeus vannamei fed pelleted and extruded diets</style></title><secondary-title><style face="normal" font="default" size="100%">Aquaculture</style></secondary-title><short-title><style face="normal" font="default" size="100%">Aquaculture</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-08-2020</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://linkinghub.elsevier.com/retrieve/pii/S0044848620306268</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">525</style></volume><pages><style face="normal" font="default" size="100%">735307</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Passive acoustics monitoring (PAM) is an exceptional tool to analyze the feeding behavior of shrimp, as they emit a &amp;ldquo;click&amp;rdquo; sound by the mandibular occlusion. Hence, acoustic demand-feeding systems based on the click signals energy have been applied to improve feeding management in shrimp farming. These acoustic signals may be affected by the texture properties of the foods pellets, which are modified by the manufacturing process. The aim of the present study was to evaluate the acoustic activity of Litopenaeus vannamei fed pelleted and extruded diets. Two commercial diets were used, manufactured by extrusion and pelleting processing with similar formulation (36% crude protein) and pellet diameter. Acoustic evaluation was performed with these diets offered &amp;ldquo;as is&amp;rdquo; dry and previously soaked in water for one and two hours in a 2 &amp;times; 3 factorial arrangement. The pellet hardness and moisture content were also measured. The acoustic trial was performed using omnidirectional hydrophones inside acoustic foam anechoic chambers. Three fastened shrimp (10 g) were placed inside acoustic chambers and audio recordings started (30 min) when food (0.5 g) was offered. The texture of diets was closely related to the acoustic intensity (Root Mean Square Amplitude - RMS) produced by L. vannamei during the feeding activity. The greater hardness of the extruded diet resulted in higher RMS than pelleted food when offered dry, which could be an advantage for the sound detection of feeding activity. The lower RMS observed when both diets were soaked suggests that softer texture pellets can be eventually ingested without the need of mandibles occlusion, and consequently without clicking sound emission. Additionally, unusual clicks train signals were first reported when shrimp fed soaked diets, probably due to mandibles rubbing. The relationship between textural properties and acoustical responses of foods should gain more attention, especially considering the potential applications on automatic acoustic feedback systems in shrimp farming.&lt;/p&gt;
</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hamilton, Santiago</style></author><author><style face="normal" font="default" size="100%">Silva, José Filipe</style></author><author><style face="normal" font="default" size="100%">Pereira-Neves, Antonio</style></author><author><style face="normal" font="default" size="100%">Travassos, Paulo</style></author><author><style face="normal" font="default" size="100%">Peixoto, Silvio</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Sound production mechanism in the Brazilian spiny lobsters (Family Palinuridae)</style></title><secondary-title><style face="normal" font="default" size="100%">Zoomorphology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Zoomorphology</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">bioacoustics</style></keyword><keyword><style  face="normal" font="default" size="100%">Panulirus</style></keyword><keyword><style  face="normal" font="default" size="100%">Rasp</style></keyword><keyword><style  face="normal" font="default" size="100%">stridulation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Apr-08-2021</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://link.springer.com/10.1007/s00435-019-00461-5</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Strident lobsters of the Palinuridae family emit sounds in the presence of predators that can be used in the acoustic monitoring of such species. This study aims to identify sound emission and describe the structures of sound mechanism in red (Panulirus meripurpuratus) and green (Panulirus laevicauda) Brazilian spiny lobsters. The lobsters were collected in the environment, and recordings were performed in laboratory tanks with submerged hydrophones. The animals were stimulated to emit sound by the presence of an artificial octopus in the tank. The sounds emitted by the lobsters were analyzed by means of the waveform, and the structures involved (plectrum and file) were observed using scanning electron microscopy (SEM). Both species emitted a rasp sound composed of several pulses, with a rate varying from 125 to 265 pulses per second. The SEM showed that the file is similar between the species and it is covered by microscopic plates (shingles) measuring between 12.6 and 12.9 &amp;mu;m of medial&amp;ndash;lateral width and 6.2 &amp;mu;m and 7.1 &amp;mu;m of anteroposterior length. This analysis also revealed for the first time the presence of pores (&amp;lt;&amp;thinsp;1 &amp;mu;m in diameter) with vestiges of cuticular setae in-between the shingles, which could be involved in the mechanosensory control of sound production in lobsters. The results of this study corroborate the morphological pattern of sound emission structure described for other lobsters of the genus Panulirus.&lt;/p&gt;
</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Silva, José Filipe</style></author><author><style face="normal" font="default" size="100%">Hamilton, Santiago</style></author><author><style face="normal" font="default" size="100%">Rocha, João Victor</style></author><author><style face="normal" font="default" size="100%">Borie, Alfredo</style></author><author><style face="normal" font="default" size="100%">Travassos, Paulo</style></author><author><style face="normal" font="default" size="100%">Soares, Roberta</style></author><author><style face="normal" font="default" size="100%">Peixoto, Silvio</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Acoustic characterization of feeding activity of Litopenaeus vannamei in captivity</style></title><secondary-title><style face="normal" font="default" size="100%">Aquaculture</style></secondary-title><short-title><style face="normal" font="default" size="100%">Aquaculture</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-02-2019</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://linkinghub.elsevier.com/retrieve/pii/S0044848618320398https://api.elsevier.com/content/article/PII:S0044848618320398?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0044848618320398?httpAccept=text/plain</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">501</style></volume><pages><style face="normal" font="default" size="100%">76 - 81</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The aim of the present study was to evaluate the acoustic activity of Litopenaeus vannamei of different size classes during feeding in captivity, as well as describe the sound generation mechanism and main associated acoustic variables. The structure responsible for sound emission was identified based on simultaneous audio and video recordings during the consumption of feed pellets. Eighteen animals divided into three size classes (small: 13.03 &amp;plusmn; 1.87 g; medium: 22.09 &amp;plusmn; 2.20; large: 35.31 &amp;plusmn; 3.20 g) were used for the acoustic characterization of feeding activity. The animals were fed three pellets (48 &amp;plusmn; 4 mg) individually and offered in sequence. The recording of each pellet offered lasted 10 min, beginning with the point at which the animal took the pellet. The number of sound pulses (&amp;ldquo;clicking&amp;rdquo; sound) per pellet ingested was counted and related to food intake. L. vannamei emits sound during the feeding process, which is associated with the closing of the mandibles during the shredding of the food. The average values for the acoustic variables were a minimum frequency of 3.47 &amp;plusmn; 0.32 kHz, maximum frequency of 37.75 &amp;plusmn; 2.44 kHz, frequency peak of 11.1 &amp;plusmn; 3.39 kHz, maximum energy of 83.55 &amp;plusmn; 3.39 dB and sound duration of 4.7 &amp;plusmn; 0.2 ms. No statistically significant differences in the acoustic variables were found among the different size classes or in the sequence of the pellets offered. The number of clicks per pellet ranged from 121 to 154 for all size classes. However, the number of clicks generated in the large class was significantly higher during the first minute after the capture of the pellets, dropping significantly after five minutes in comparison to the other size classes. The findings demonstrate that L. vannamei is acoustically active and the sounds generated can be used as an indication of feeding activity in captivity. The click rate per pellet or particular period of time, combined with the maximum energy generated at a specific frequency (frequency peak) can be used as an indication of the quantity of feed consumed by the animals.&lt;/p&gt;
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