Дисертації з теми "Tursiop"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Tursiop".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Boero, Sara. "Caratteristiche anatomiche del corpo genicolato mediale nel tursiope (Tursiops truncatus)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6626/.
Повний текст джерелаPanin, Mattia. "Concentrazione plasmatica e produzione extrapineale di melatonina nel tursiope (Tursiops truncatus)." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422925.
Повний текст джерелаLa melatonina è un ormone ubiquitario, prodotto sia in vertebrati che in invertebrati, compresi batteri e protozoi, oltre che in piante superiori. Il suo ruolo principale nei vertebrati è quello di regolatore dei ritmi biologici, grazie a un pattern di secrezione che riflette l’alternanza del ciclo luce-buio durante il giorno, determinando ritmi circadiani. Nel corso dell’anno questo ritmo cambia continuamente in risposta alla variazione della lunghezza del giorno, determinando complessivamente un ritmo circannuale o stagionale. La melatonina circolante nei mammiferi è prodotta per la maggior parte dalla ghiandola pineale (o epifisi), struttura neuroendocrina posta sul tetto del terzo ventricolo e facente parte del diencefalo. Questa ghiandola nei cetacei è generalmente considerata assente, anche se i riscontri in letteratura sono contraddittori, dato che in alcune specie ne viene documentata la presenza. In altre specie ancora, alcuni autori la osservano in alcuni esemplari, mentre altri studi su individui conspecifici non la individuano. Quest’ultimo caso riguarda anche il comune tursiope (Tursiops truncatus), che è stato l’oggetto di questo studio. L’obiettivo di questa ricerca è stato quello di valutare alcuni aspetti della produzione di melatonina, non ancora studiata in questa specie, da diversi punti di vista, macroscopico, fisiologico e biomolecolare. Per prima cosa è stata valutata la presenza della pineale in una serie di encefali di tursiope, dei quali nessuno sfortunatamente presentava la ghiandola. Per verificare se la melatonina fosse comunque prodotta in questa specie è stata organizzata la raccolta periodica di campioni di sangue da esemplari tenuti in cattività, nell’arco di sette mesi, in due gruppi in località distinte. La concentrazione di melatonina è stata determinata attraverso un radioimmunosaggio (RIA), che ha rivelato per la prima volta l’effettiva presenza dell’ormone nel sangue, con alcune fluttuazioni stagionali e variazioni giornaliere. La significatività di tali variazioni è stata purtroppo limitata dall’impossibilità di rispettare a pieno il disegno di campionamento, ottenendo meno campioni del previsto. Poiché la pineale è apparentemente assente ma il suo principale secreto è presente nel sangue di tursiope, è stata valutata la sua produzione da parte di siti alternativi. In letteratura è ampiamente documentata la produzione extrapineale di melatonina in alcuni tessuti, anche se il loro effettivo contributo ai livelli circolanti dell’ormone non è ancora del tutto chiaro. Nei mammiferi i tre principali siti extrapineali sono la retina, la ghiandola di Harder e l’intestino. È stata quindi indagata la potenziale secrezione di melatonina da parte di questi tessuti nel tursiope, tramite immunoistochimica contro l’enzima idrossiindol-O-metil-trasferasi (HIOMT), l’ultimo della via biosintetica dell’ormone. Come controllo positivo è stato utilizzata la pineale di bovino. Tutti e tre i tessuti sono risultati immunoreattivi, anche se con qualche differenza rispetto alla maggior parte dei mammiferi. Per verificare in modo alternativo la presenza dell’enzima nei tessuti immunopositivi, è stata valutata tramite PCR l’espressione del suo mRNA. Non essendo disponibili sequenze dell’enzima di alcun cetaceo sono state eseguite alcune prove con primer disegnati sulla sequenza di bovino (filogeneticamente vicino al tursiope), oltre che su quella ipotetica del gene di tursiope presente nella banca dati ENSEMBL, per un totale di cinque diverse coppie di primer. Nessuna di esse ha purtroppo dato esito positivo, nemmeno nei tre tessuti immunoreattivi, il che suggerisce la necessità di caratterizzare il gene di HIOMT in studi futuri per risalire alla corretta sequenza e disegnare primer specifici. Un ulteriore aspetto della produzione di melatonina nel tursiope, indagato in questo studio, è stato quello dell’utilizzo di un modello in vivo alternativo a quello dell’animale in toto, ovvero di colture cellulari. Poiché in letteratura è stata dimostrata la produzione di melatonina da parte della cute di alcuni mammiferi, ed essendo la pelle il tessuto più facilmente recuperabile durante la necroscopia di un cetaceo, sono state ricavate delle colture cellulari da campioni cutanei di tursiope. Le coltura primarie inizialmente ottenute sono state stabilizzate tramite processo di immortalizzazione, per poi caratterizzarle attraverso la determinazione del cariotipo e l’identificazione immunoistochimica di specifici marker citoscheletrici. L’espressione di HIOMT da parte delle cellule di cute è stata valutata sia attraverso immunocitochimica, sia attraverso PCR, entrambe risultate negative, suggerendo che la cute nel tursiope non sia un sito di produzione di melatonina.
Zenaro, Veronica. "Caratteristiche citoarchitettoniche e neurochimiche del nucleo centrale dell'amigdala di Tursiope (Tursiops truncatus)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9496/.
Повний текст джерелаCortini, Nadine. "Distribuzione dell'immunoreattività per la calbindina-D28k nell'amigdala palliale di tursiope (Tursiops truncatus)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Знайти повний текст джерелаAlpa, Riccardo. "Distribuzione dei neuroni immunoreattivi per la sostanza P nei nuclei profondi del complesso amigdaloideo di Tursiope (Tursiops truncatus)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14711/.
Повний текст джерелаBendici, Rossella. "Monitoraggio di popolazioni di tursiopi in nord-Adriatico. Comparazione con il metodo della foto identificazione tra survey 2014 e 2018." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18031/.
Повний текст джерелаFebei, Davide Maria. "Analisi delle interazioni sociali tra un esemplare di Grampo (Grampus griseus) e una comunità di Tursiopi (Tursiops truncatus) residenti in ambiente controllato." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1405/.
Повний текст джерелаCaserta, Valentina. "Distribuzione dei neuroni che esprimono il peptide correlato al gene della calcitonina (CGRP) nel midollo spinale di Tursiope (Tursiops truncatus, Montagu, 1821)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7738/.
Повний текст джерелаWickert, Janaína Carrion. "Tursiops no Oceano Atlântico Sul Ocidental : redescrição e revalidação de TURSIOPS GEPHYREUS LAHILLE, 1908 (CETARTIODACTYLA: DELPHINIDAE)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/183391.
Повний текст джерелаHohl, Leandro dos Santos Lima. "Variações cranianas em Tursiops truncatus (Mammalia: Certartiodactyla) em diferentes localidades dos oceanos, com ênfase na costa sul-americana: uma abordagem pela técnica de morfometria geométrica." Universidade do Estado do Rio de Janeiro, 2015. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=8393.
Повний текст джерелаOs delfinídeos são os cetáceos mais ecologicamente diversos, ocorrendo numa ampla faixa de latitudes, em águas oceânicas e costeiras, incluindo regiões estuarinas e dulcícolas. O cenário taxonômico é especialmente confuso no gênero Tursiops, uma vez que grande parte das formas tem sido sinonimizadas na espécie Tursiopstruncatus. No entanto, estudos recentes sugerem que o gênero Tursiops seja polifilético. O golfinho-nariz-de-garrafa,T.truncatus, ocorre tanto em águas costeiras quanto oceânicas, em todas as regiões tropicais e temperadas. A espécie T. truncatus é tida como polimórfica e tal característica a torna alvo de acirradas discussões acerca do que são variações regionais ou diferentes entidades taxonômicas. O objetivo do presente estudo foi analisar a variabilidade morfológica de T. truncatus em distintas regiões oceânicas, buscando fornecer informações que permitam embasar os argumentos para futuras discussões taxonômicas que envolvem o gênero. Para isso, foi feita análise de Morfometria Geométrica em 2-D de crânios em vistas dorsal e lateral de espécimes que ocorrem nos oceanos Pacífico Norte Oriental, Atlântico Norte Ocidental, Atlântico Sul Ocidental, Atlântico Norte Oriental, Atlântico Sul Oriental e Índico. Foram encontradas diferenças significativas em todo o material analisado, incluindo diferenças entre exemplares reconhecidos como T. gephyreus e T. truncatus na costa Atlântica da América do Sul. As variações cranianas encontradas possuem relação com o tipo de ambiente em que os diferentes grupos ocorrem e podem estar relacionadas com a forma de forrageio, captura de presa e ao sistema de ecolocalização. Além disso, as variações na costa Atlântica da América do Sul podem ser explicadas pelo possível reconhecimento de duas espécies nessa região
Delphinids are the most ecologically diverse cetaceans, occurring in a wide range of latitudes in pelagic and coastal waters, including estuarine and freshwater regions. The taxonomy is especially confusing on genus Tursiops, since most forms has been synonymized in the specie Tursiopstruncatus. However, recent studies suggest that Tursiops is polyphyletic. The bottlenose dolphinT.truncatus habit coastal and pelagic waters in all tropical and temperate regions.Tursiopstruncatus is considered polymorphic and this characteristic makes the target of bitter taxonomic discussions about what are regional variations or different taxonomic entities. The objective was to analyze the cranial morphological variability of T. truncatus in different ocean regions to provide arguments for taxonomic discussions involving this genus. Two dimensional Geometric Morphometric analysiswas performed in skulls on dorsal and lateral views of specimens occurring in the Pacific North East, North West Atlantic, South West Atlantic, East North Atlantic, East South Atlantic and Indian oceans. There were significant differences between all groups, including differences between specimens recognizedasT. gephyreus and T. truncatus in the Atlantic coast of South America. The skull variationsare related to the type of environment in which different groups occur and may be relating to the foraging, prey capture and echolocation system. In addition, variations along the Atlantic coast of South America can be explained by the possible recognition of two species in this region
Finn, Hugh C. "Conservation biology of bottlenose dolphins (Tursiops sp.) in Perth metropolitan waters." Access via Murdoch University Digital Theses Project, 2005. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20051103.135358.
Повний текст джерелаChiurazzi, Sara. "Valutazione dell'ormone TSH in Tursiops truncatus." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10029/.
Повний текст джерелаFougères, Erin M. "Thermoregulation in bottlenose dolphins (Tursiops truncatus)." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-1/r3/fougerese/erinfougeres.pdf.
Повний текст джерелаRigon, Camila Thiesen. "O complexo tímpano-periótico do gênero Tursiops (CETARTIODACTYLA: DELPINIDAE) no Atlântico Sul Ocidental." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/142172.
Повний текст джерелаCole, Katharine Ruth. "Energetics in the Atlantic bottlenose dolphin, Tursiops truncatus Montagu." Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU543518.
Повний текст джерелаAeschlimann, Margaret (Peggy) Allie. "Mother-calf affiliations in captive bottlenose dolphins (Tursiops sp.) /." St. Lucia, Qld, 2000. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16517.pdf.
Повний текст джерелаEstes, Melissa Kay. "A phylokaryotypic evaluation of the genus Tursiops (family Delphinidae)." PDXScholar, 1985. https://pdxscholar.library.pdx.edu/open_access_etds/3440.
Повний текст джерелаFripp, Deborah 1970. "Techniques for studying vocal learning in bottlenose dolphins, Tursiops truncatus." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85610.
Повний текст джерелаVita.
Includes bibliographical references.
by Deborah Redish Fripp.
Ph.D.
Lopez, Marulanda Juliana. "Acoustic Communication and Social Behavior in Bottlenose Dolphins (Tursiops truncatus)." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS016/document.
Повний текст джерелаBottlenose dolphins are highly social cetaceans that strongly rely on acoustic communication and signaling. The diversity of sounds emitted by the species has been structurally classified in whistles, clicks and burst-pulsed sounds, with some whistles called « signature whistles » that are used as cohesion calls. During this thesis, we developed an easily deployable system that identifies the animal producing sound and allows simultaneous underwater behavioral observations. We tested this methodology with bottlenose dolphins infreedom and in captivity. The present doctoral thesis aims to better understand the communication of bottlenose dolphins within their social group. First, I developed two studies to describe how the signature and non-signature whistle rate of captive dolphins varies in relation to behavior and interaction with humans. Secondly, I present the design and implementation of an innovative methodology (BaBeL system) that allows the localization of vocalizing dolphins in a three-dimensional environment, and which can be used in captivity and with free-range dolphins. Finally, I present two applications of this location methodology to address research questions regarding the exploratory behavior of a young dolphin and the use of vocalizations for coordinated movements in bottlenose dolphins
Hoffmann, Lilian Sander. "Um estudo de longa duração de um grupo costeiro de golfinhos Tursiops truncatus (Montagu, 1821) (Cetacea, Delphinidae) no sul do Brasil : aspectos de sua biologia e bioacústica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2004. http://hdl.handle.net/10183/16473.
Повний текст джерелаThe occurrence and association patterns of a small group of dolphins, Tursiops truncatus, inhabiting the Tramandaí lagoon, RS, have been studied since 1996. The study includes bioacoustics data since 2002. The individuals were observed in that area every year through photo-identification, which characterizes them as resident, although their absence is very frequent. The size of the group is quite constant, with eight adults, but the birth of calves increases this number temporarily, being 11 the largest group size observed in one year. The births recorded for the two females of this group occurred at least twice a year (autumn and spring), with an interval of approximately 2.7 years. Although less observed in the winter, animals were present in the area, with varying degrees of association and fidelity, some animals being observed more frequently than others. Solitary animals were frequent in any period. Larger groups were most frequent in autumn and secondarily in spring, due to the presence of calves. Regarding associations, pairs of dolphins were the most frequent form, although groups of up to seven dolphins were recorded. Different from the expected for small groups, surface association indexes were low in the whole period of the study. Strong association (>0.40) occurred only between females and calves; strong associations were temporary (one day) among other individuals, characterizing their social organization as a continuum from different extremes of association, probably adapted to social and environmental conditions. In the analysis of the sound repertory of the group, various kinds of vocalizations were observed, from whistles to clicks of echolocation and burst sounds, the latter ones associated to feeding activities. A total of 1768 whistles were observed, from which five general patterns of the fundamental frequency modulation were distinguished: Ascending, descending, concave, multiple and in parabolic form. Constant modulation whistles were not recorded. The five patterns allowed distinguishing at least 34 subcategories of whistles. Ascending whistles predominate in the records, but the other two frequent patterns (parabola and multiple) were also representative. The number and kind of whistles varied according to the context, where more than 80% of them were recorded in association periods. Multiple whistles were most frequently recorded in associations, mainly between females and calves. During this interaction, ascending whistles predominated, but vocalizations presented a very distinct pattern, with long sequences and several different kinds of whistles, sometimes superimposed, suggesting combinations which might be related to the importance of the communication between female and calf in this period. Solitary animals produced a specific kind of whistle, with a parabolic form around the fundamental frequency. This class presented the most varied kinds. Due to the frequency of occurrence as well as their variations in the modulation of the fundamental frequency, it is suggested that in this category one could find the individual signatures of this group. The large number of whistle kinds and the different contexts in which they were recorded suggest that the animals have a varied repertory, where several signals are shared among them. Finally, the comparison of manual and automatic extraction methods of acoustic parameters did not show meaningful differences, thus allowing the results of both techniques.
Bloodworth, Brian Edward. "Comparative feeding biomechanics and behavioral performance of feeding in the family kogiidae and tursiops truncatus (odontoceti, cetacea)." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/5868.
Повний текст джерелаHübner, Sebastian Valentin. "Wissensbasierte Modellierung von Audio-Signal-Klassifikatoren zur Bioakustik von Tursiops truncatus." Potsdam Univ.-Verl, 2006. http://d-nb.info/1000230988/34.
Повний текст джерелаEsch, H. Carter. "Whistles as potential indicators of stress in bottlenose dolphins (Tursiops truncatus) /." Electronic version (PDF), 2006. http://dl.uncw.edu/etd/2006/eschh/hcarteresch.pdf.
Повний текст джерелаBirgersson, Sabina. "Personality assessment and interactions in eight captive bottlenose dolphins (Tursiops truncatus)." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70136.
Повний текст джерелаHudak, Christine A. "Habitat Utilization by Bottlenose Dolphins (Tursiops truncatus) in Biscayne Bay, Florida." NSUWorks, 2003. http://nsuworks.nova.edu/occ_stuetd/116.
Повний текст джерелаcom, hugh finn@bigpond, and Hugh Colin Finn. "Conservation Biology of Bottlenose Dolphins(Tursiops Sp.) in Perth Metropolitan Waters." Murdoch University, 2005. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20051103.135358.
Повний текст джерелаHolobinko, Anastasia. "Conflict and reconciliation behavior trends of the bottlenose dolphin (Tursiops truncatus) /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1203561731&sid=18&Fmt=2&clientId=1509&RQT=309&VName=PQD.
Повний текст джерелаKleiva, Žilvinas. "Delfinariume laikomų Juodosios jūros delfinų (Tursiops truncatus ponticus) sveikatos tyrimų analizė." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20131104_101530-39609.
Повний текст джерелаThe aim of the thesis is to identify the influence of various factors on blood indices and breathing function of the Black sea dolphins (Tursiops truncatus ponticus) that are kept in dolphinariums and also to do analysis of the reasons of dolphins’ diseases and death. The goals of the thesis: 1. Determine the physiological morphological and biochemical parameters of the dolphins’ blood with regard to their age and sex. 2. Determine the influence of the size of the pools on the respiratory rate of dolphin females and calves during the postnatal period. 3. Analyze the diseases affecting dolphins and the frequency of their occurance. 4. Study morphological and biochemical changes in dolphins blood parameters with regard to the diseases. 5. Identify the causes of death through pathological, anatomical, histopathological and microbiological examinations. The research has broadened the scientific knowledge about the Black sea dolphins’ (Tursiops truncatus ponticus) physiological characteristics and pathological conditions. It has been found out that the size of a pool has influence over the Black sea dolphin females and calves' respiratory rate as well as behaviour. Bearing in mind that there are genetic differences among other Tursiops truncatus dolphins, in the current research healthy Black sea afalins’ blood physiological morphological and biochemical parameters have been identified with regard to their age and sex. It is the first time in Lithuania when the frequencies of... [to full text]
Natoli, Ada. "Molecular ecology of bottlenose (Tursiops sp.) and common (Delphinus sp.) dolphins." Thesis, Durham University, 2004. http://etheses.dur.ac.uk/2983/.
Повний текст джерелаSilva, Inês de Melo. "Análise dos assobios emitidos por golfinhos-roazes (Tursiops truncatus) em cativeiro." Master's thesis, Instituto Superior de Psicologia Aplicada, 1998. http://hdl.handle.net/10400.12/932.
Повний текст джерелаO estudo foi realizado com um grupo de oito golfinhos-roazes no Zoomarine (Algarve). Os sons foram recolhidos utilizando-se um hidrofone Bruel &Kjaer 8103, um amplificador e um gravador DAT Sony TCD 10-PRO. Os sons foram recolhidos nos primeiros 15 minutos de cada hora, desde as 9h às 19h. Simultaneamente, procedia-se à descrição dos comportamentos exibidos pelos golfinhos. Recolheram-se também os sons e os comportamentos de três espectáculos, nos quais se registaram os primeiros 15 minutos, os 30 minutos de duração e os 15 minutos posteriores. Os assobios foram os sons mais abundantes (47% da amostra total) e a sua emissão foi concordante ao longo dos dias de amostragem, em cada hora do dia. A todas as horas do dia, a natação foi o comportamento mais abundante, seguindo-se o repouso, mas a uma frequência bastante mais baixa. A interacção com os treinadores apresenta dois picos de actividade (às l0h e 18h), em simultâneo com a alimentação. Os assobios são mais abundantes em situações em que há interacção entre os golfinhos e os treinadores e situações de alimentação, durante a qual, por vezes, existiam sessões de treino. Na amostra de assobios categorizados (1755), a sua duração média é inferior a 1 segundo, sendo a maior parte dos assobios (n=768) inferiores a 300ms. Quanto à frequência, os valores médios encontram-se entre os '5 e os 15 kHz, típicos destes sinais acústicos. Os pares de "frequência inicial" e "frequência mínima", "frequência final" e "frequência máxima” e "frequência inicial" e "frequência final" estão correlacionados. Foram encontrados 15 categorias de perfis de modulação de frequência, entre os quais a categoria n° 9 (em forma de U, 22.67%) foi a mais abundante. Somente 4 categorias possuíam loops, cujo número médio foi de 3 loops por assobio. As várias categorias de perfis de modulação foram emitidas mais abundantemente durante situações de interacção, quer entre os golfinhos quer com os treinadores, bem como em contextos de jogo não social. Todos os golfinhos participaram na emissão dos diversos perfis de modulação de frequência. Tanto o Happy como o King parecem emitir em maior abundância os perfis n° 2, 3, 5 e 10. A Missy emite mais o perfil n° 6, enquanto a Colby produz mais assobios com os perfis 7, 8 e 10. Para o perfil n° 11, a Cher emite-o em maior abundância, bem como o perfil n° 8. Já o Sam e o Lucky parecem produzir, mais que o esperado, o perfil n° 9.
Finn, Hugh. "Conservation biology of bottlenose dolphins (Tursiops sp.) in Perth metropolitan waters." Thesis, Finn, Hugh (2005) Conservation biology of bottlenose dolphins (Tursiops sp.) in Perth metropolitan waters. PhD thesis, Murdoch University, 2005. https://researchrepository.murdoch.edu.au/id/eprint/49/.
Повний текст джерелаFinn, Hugh. "Conservation biology of bottlenose dolphins (Tursiops sp.) in Perth metropolitan waters." Finn, Hugh (2005) Conservation biology of bottlenose dolphins (Tursiops sp.) in Perth metropolitan waters. PhD thesis, Murdoch University, 2005. http://researchrepository.murdoch.edu.au/49/.
Повний текст джерелаClegg, Isabella louisa. "Developing welfare parameters for bottlenose dolphins (Tursiops truncatus) under human care." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCD055/document.
Повний текст джерелаWelfare science is now an established discipline which enables objective measurements of animal welfare to be made. Bottlenose dolphins (Tursiops truncatus) are a common cetacean species kept in captivity, and although questions are arising over their quality of life in this environment, very few studies have focussed on objectively measuring their welfare. This thesis aimed to address this lack of data by developing animal-based indicators of bottlenose dolphin welfare. An initial review identified potential dolphin welfare measures, before selected behavioural indicators were measured in relation to training sessions. A judgement bias test was then adapted to dolphins, where optimistic biases were significantly linked to higher frequencies of synchronous swimming in their ‘free-time’ and lower frequencies of anticipatory behaviour before training sessions, (concurring with there ward-sensitivity theory). A penultimate study showed that anticipatory behaviour predicted participation in the upcoming event, and positive Human-Animal Interactions were anticipated more than access to toys. A final, on-going experiment has developed and applied a standardised protocol for measuring dolphins’motivation during training sessions in relation to social and health-related welfare problems. Although overall welfare is still difficult to measure, this thesis has proposed some first measures of dolphin emotions and affective states. Synchronous swimming is a likely indicator of positive emotions and social support, although more research should investigate variability between contexts. Anticipatory behaviour seemed to indicate motivation for events, and we suggest it reflects reward sensitivity as in other animals : further work into frequency thresholds would render it a valuable welfare indicator. A major objective of the thesis is to stimulate more research on welfare measures for bottlenose dolphins and other cetacean species in captivity
Elsberry, Wesley Royce. "Interrelationships between intranarial pressure and biosonar clicks in bottlenose dolphins (Tursiops truncatus)." Texas A&M University, 2003. http://hdl.handle.net/1969.1/554.
Повний текст джерелаQuintana-Rizzo, Ester. "Group fission-fusion dynamics and communication in the bottlenose dolphin (Tursiops truncatus)." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001841.
Повний текст джерелаGridley, Teresa. "Geographic and species variation in bottlenose dolphin (Tursiops spp.) signature whistle types." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1910.
Повний текст джерелаNowacek, Douglas Paul. "Sound use, sequential behavior and ecology of foraging bottlenose dolphins, Tursiops truncatus." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85611.
Повний текст джерелаIncludes bibliographical references.
Odontocetes are assumed to use echolocation for navigation and foraging, but neither of these uses of biosonar has been conclusively demonstrated in free-ranging animals. Many bats are known to use echolocation throughout foraging sequences, changing the structure and timing of clicks as they progress towards prey capture. For odontocetes, however, we do not know enough about their foraging behavior to describe such sequences. To conduct detailed behavioral observations of any subject animal, the observer must be able to maintain continuous visual contact with the subject for a period commensurate with the duration of the behavior(s) of interest. Behavioral studies of cetaceans, which spend approximately 95% of their time below the water's surface, have been limited to sampling surface behavior except in special circumstances, e.g. clear-water environments, or with the use of technological tools. I addressed this limitation through development of an observation platform consisting of a remote controlled video camera suspended from a tethered airship with boat-based monitoring, adjustment, and recording of video. The system was used successfully to conduct continuous behavioral observations of bottlenose dolphins in the Sarasota Bay, FL area. This system allowed me to describe previously unreported foraging behaviors and elucidate functions for behaviors already defined but poorly understood. Dolphin foraging was modeled as a stage-structured sequence of behaviors, with the goal-directed feeding event occurring at the end of a series of search, encounter, and pursuit behaviors. The behaviors preceding a feeding event do not occur in a deterministic sequence, but are adaptive and plastic. A single-step transition analysis beginning with prey capture and receding in time has identified significant links between observed behaviors and demonstrated the stage-structured nature of dolphin foraging. Factors affecting the occurrence of specific behaviors and behavioral transitions include mesoscale habitat variation and individual preferences. The role of sound in foraging, especially echolocation, is less well understood than the behavioral component. Recent studies have explored the use of echolocation in captive odontocete foraging and presumed feeding in wild animals, but simultaneous, detailed behavioral and acoustic observations have eluded researchers. The current study used two methods to obtain acoustic data. The overhead video system includes two towed hydrophones used to record 'ambient' sounds of dolphin foraging. The recordings are of the 'ambient' sounds because the source of the sounds, i.e. animal, could not be localized. Many focal follows, however, were conducted with single animals, and from these records the timing of echolocation and other sounds relative to the foraging sequence could be examined. The 'ambient' recordings revealed that single animals are much more vocal than animals in groups, both overall and during foraging. When not foraging, single animals vocalized at a rate similar to the per animal rate in groups of>=2 animals. For single foraging animals, the use of different sound types varies significantly by the habitat in which the animal is foraging. These patterns of use coupled with the characteristics of the different sound types suggest specific functions for each. The presence of multiple animals in a foraging group apparently reduces the need to vocalize, and potential reasons for this pattern are discussed. In addition, the increased vocal activity of single foraging animals lends support to specific hypotheses of sound use in bottlenose dolphins and odontocetes in general. The second acoustic data collection method records sounds known to be from a specific animal. An acoustic recording tag was developed that records all sounds produced by an animal including every echolocation click. The tag also includes an acoustic sampling interval controller and a sensor suite that measures pitch, roll, heading, and surfacing events. While no foraging events occurred while an animal was wearing an acoustic data logger, the rates of echolocation and whistling during different activities, e.g. traveling, were measured.
by Douglas Paul Nowacek.
Ph.D.
Thomas, Rebecca Elizabeth. "Relating behavioral context to acoustic parameters of bottlenose dolphin (Tursiops truncatus) vocalizations." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/29049.
Повний текст джерелаIncludes bibliographical references.
This thesis presents methods to analyze the function of vocalizations of the bottlenose dolphin, Tursiops truncatus. The thesis uses the social interaction as the basic unit of analysis, and maintains a deliberate focus on quantitative and replicable analyses throughout. A method for determining identity of the vocalizing animal in a lagoon was developed. This method combined passive acoustic localization with video sampling to determine which animal vocalized. It fills an urgent need for unbiased identification of vocalizations of undisturbed dolphins where details of social interactions can be followed without affecting the behavior of the subjects. This method was implemented in a captive lagoon with 6 dolphins: two adult females, their two male calves, and a juvenile male and a juvenile female. This thesis also reviews the current state of analysis of the bottlenose dolphin acoustic repertoire, highlighting the need for a detailed, quantitative, and consistent study of the entire vocal repertoire. It does not attempt to do a comprehensive repertoire study, but uses several new quantitative methods to parameterize vocalizations and relate these to behavior from dolphins. Vocalizations within the lagoon tended to occur around the time of onset of behaviors produced by the focal dolphin. A comparison of vocalizations during affiliative and agonistic interactions revealed that the association of group vocalizations with the behavior of a focal animal was related to agonistic but not affiliative interactions.
Using the localization/video method, vocalizations in a time window around submissive behaviors were localized and classified as having come from either dolphins engaged in the interaction or dolphins not engaged in the interaction. Vocalizations were emitted by interactants more often than expected, and by non-interactants less often than expected. Use of different vocalization types was found to vary depending on the context of the agonistic interaction. In addition, the sequence of vocalizations with respect to behaviors within the interaction mattered, with more vocalizations occurring after than before submissive behaviors. These results demonstrated that group-based analyses of vocalizations are insufficient and one must use techniques designed to focus on the level of the interaction in order to study communication and social behavior in dolphins.
by Rebecca Elizabeth Thomas.
Ph.D.
Martins, Ana Paz Gonçalves. "Análise de duas experiências de competência numérica em golfinhos-roazes (tursiops truncatus)." Master's thesis, Instituto Superior de Psicologia Aplicada, 2002. http://hdl.handle.net/10400.12/653.
Повний текст джерелаNos últimos anos, a capacidade de discriminar estímulos diferindo na numerosidade começou a ser escudada em espécies filogeneticamente distantes. Com o objectivo de determinar a capacidade de competência numérica em Tursiops truncatos, quatro destes animais foram treinados a associar um determinado sinal ao número de argolas que deveriam recolher da piscina. Numa Fase I dois golfinhos foram treinados diariamente a discriminar dois estímulos visuais, constituídos por figuras geométricas bidimensionais representadas numa placa, correspondentes aos números 2 e 4. De modo a testar a sua capacidade de distinguir os dois sinais foram efectuados treinos de Delayed matching-to sample (DMTS) entre as placas, aliados aos treinos com argolas. Estes consistiram numa sequência de trials durante as quais, após a apresentação do estímulo, o animal deveria trazer o número de argolas correspondente. A análise aos resultados das sessões de teste mostra que não ocorreu uma discriminação entre as placas, nem uma associação entre o sinal visual e o número de argolas. Posteriormente, na Fase II, aos restantes golfinhos-roazes foram apresentados estímulos acústicos, representando os números 1 e 2. A utilização de sons como estímulos é geralmente caracterizada por uma aprendizagem rápida e, aparentemente, com pouco esforço por parte do animal. Tal como na Fase anterior o animal deveria trazer o número de argolas dependendo do som emitido e apenas as respostas positivas eram recompensadas. Os resultados obtidos nas sessões de teste, mostraram que, de um modo geral, o número de argolas recolhido foi independente do som emitido. Pode-se concluir que os animais tiveram uma grande dificuldade em interpretar os estímulos apresentados, não tendo efectuado uma associação entre o sinal emitido e o número de argolas a recolher. São apresentadas e discutidas as variáveis que deverão ser controladas em trabalhos futuros, assim como os aspectos metodológicos que poderão ter enviesado os resultados.
Barbieri, Michelle Marie. "Physiological and behavioral thermoregulation in bottlenose dolphins (Tursiops truncatus) in Sarasota, Florida /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/barbierim/michellebarbieri.pdf.
Повний текст джерелаRhind, Susan. "A quantitative study of the behaviour of captive Bottlenose Dolphins (Tursiops truncatus)." Thesis, Rhind, Susan (1991) A quantitative study of the behaviour of captive Bottlenose Dolphins (Tursiops truncatus). Honours thesis, Murdoch University, 1991. https://researchrepository.murdoch.edu.au/id/eprint/41507/.
Повний текст джерелаKilian, Annette. "Funktionelle cerebrale Asymmetrien visueller Prozesse und numerische Fähigkeiten beim Grossen Tümmler (Tursiops truncatus)." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972544941.
Повний текст джерелаWang, John Yu-Chao. "The classification of sympatric forms of bottlenose dolphins (genus Tursiops) in Chinese waters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0020/NQ51021.pdf.
Повний текст джерелаDible, S. A. "Sonar properties of the lower jaw of the Atlantic bottlenose dolphin (Tursiops truncatus)." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/12929.
Повний текст джерелаSayigh, Laela Suad. "Development and functions of signature whistles of free-ranging bottlenose dolphins, Tursiops truncatus." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12900.
Повний текст джерелаArso, Civil Mònica. "Population ecology of bottlenose dolphins (Tursiops truncatus) off the east coast of Scotland." Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/6543.
Повний текст джерелаHastie, Gordon Drummond. "Fine-scale aspects of habitat use and behaviour by bottlenose dolphins (Tursiops truncatus)." Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU145531.
Повний текст джерелаPowell, Jessica R. "Depredation and angler interactions involving bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002920.
Повний текст джерелаSmith, Holly. "Population dynamics and habitat use of bottlenose dolphins (Tursiops aduncus), Bunbury, Western Australia." Thesis, Smith, Holly (2012) Population dynamics and habitat use of bottlenose dolphins (Tursiops aduncus), Bunbury, Western Australia. PhD thesis, Murdoch University, 2012. https://researchrepository.murdoch.edu.au/id/eprint/9441/.
Повний текст джерелаBrensing, Karsten. "Approaches to the behavior of dolphins Tursiops truncatus during unstructured swim with dolphin programs." [S.l. : s.n.], 2004. http://www.diss.fu-berlin.de/2004/164/index.html.
Повний текст джерела