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Dissertations / Theses on the topic 'Arctocephalus pusillus'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Gibbens, John Robert. "Demography of Australian fur seals (Arctocephalus pusillus doriferus)." Connect to thesis, 2009. http://repository.unimelb.edu.au/10187/5788.

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The Australian fur seal (Arctocephalus pusillus doriferus) population has displayed a relatively slow rate of recovery since being hunted by commercial sealers during the early 19th century. Despite this, population abundance doubled in the past 2 – 3 decades, indicating that the population growth rate has recently increased. Yet, the factors influencing the population’s dynamics are poorly understood, primarily because basic demographic rates are unknown.<br>Female age, survival, fecundity, breeding and physiology were studied at Kanowna Island, Bass Strait, Australia, between 2003 – 2006 by

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2

Mecenero, Silvia. "The diet of the Cape fur seal Arctocephalus pusillus pusillus in Namibia : variability and fishery interactions." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4387.

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3

Huisamen, Johan. "Recolonisation of the Robberg Peninsula by the Cape Fur Seal Arctocephalus pusillus pusillus and its prey preferences." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1006438.

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The Cape fur seal Arctocephalus pusillus pusillus colony at the Robberg Peninsula, Plettenberg Bay, on the south-east coast of South Africa, was driven to extirpation by indiscriminate harvesting by the late 1800s and seals only began to recolonise this site in the 1990s. This study describes the recolonisation process from 2000 to 2009, exploring within- and between-year variation in the number of seals using the site. Numbers increased over the study period from less than 300 animals to over 3 100. Year and month were important in explaining variability in seal counts, whereas sea condition,

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4

Lord, Elin. "Olfactory discrimination of aliphatic 2-ketones and 1-alcohols in South African fur seals (Arctocephalus pusillus pusillus)." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18932.

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Odor discrimination ability was tested in four female South African fur seals (Arctocephalus pusillus pusillus) using a food-rewarded two-choice instrumental conditioning paradigm. The seals’ ability to distinguish between members of homologous series of aliphatic ketones (2-butanone to 2-heptanone) and alcohols (1-butanol to 1-heptanol) was assessed. The results showed that three out of four seals successfully discriminated between all of their stimulus combinations in both classes of odorants. One seal succeeded to reach the discrimination criterion with all 2-ketones but failed with all 1-a

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5

Kim, Sunghee. "Olfactory discrimination ability of South African fur seals (Arctocephalus pusillus) for enantiomers." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78364.

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The sense of smell in marine mammals is traditionally thought to be poor. However, increasing evidence suggests that pinnipeds may use their sense of smell in a variety of behavioral contexts including communication, foraging, food selection, and reproduction. Using a food-rewarded two-choice instrumental conditioning paradigm, I assessed the ability of South African fur seals, Arctocephalus pusillus, to discriminate between 12 enantiomeric odor pairs, that is, between odorants that are identical in structure except for chirality. The fur seals significantly discriminated between eight out of

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6

Marcelino, Inês da Silva Soleiro Nunes. "Estudo sobre parasitoses cardiopulmonares e gastrointestinais em pinípedes num contexto zoológico." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2016. http://hdl.handle.net/10400.5/10849.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Com o objetivo de identificar parasitas e doenças parasitárias de pinípedes que vivem sob cuidados humanos em Portugal, realizou-se um estudo sobre parasitoses cardiopulmonares e gastrointestinais na coleção de pinípedes pertencente ao Zoomarine – Mundo Aquático S.A., que se situa no Algarve. No total, foram colhidas 19 amostras sanguíneas e 79 amostras fecais de 20 indivíduos de três espécies: foca-comum (Phoca vitulina) (n=6), foca-cinzenta (Halichoerus grypus) (n=2) e leão-marinho-californiano (Zalophus californianus) (n=6) e de

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7

Oppermann, Daniela [Verfasser]. "Dressurexperimente zum Kontrast- und Farbensehen von Phoca vitulina und Arctocephalus pusillus / Daniela Oppermann." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1075942934/34.

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8

Stewardson, Carolyn Louise. "Biology and conservation of the Cape (South African) fur seal Arctocephalus pusillus pusillus (Pinnipedia:Otariidae) from the Eastern Cape coast of South Africa." Connect to this title online, 2001. http://thesis.anu.edu.au/public/adt-ANU20030124.162757/.

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Thesis (Ph. D.)--Australian National University, 2001.<br>Title from PDF title page (viewed May 8, 2005). Consists of reprints of thirteen published papers, some co-authored with others, plus an introductory chapter, two unpublished manuscripts, and a conclusion. Includes bibliographical references.

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9

Stewardson, Carolyn Louise, and carolyn stewardson@anu edu au. "Biology and conservation of the Cape (South African) fur seal Arctocephalus pusillus pusillus (Pinnipedia: Otariidae) from the Eastern Cape Coast of South Africa." The Australian National University. Faculty of Science, 2002. http://thesis.anu.edu.au./public/adt-ANU20030124.162757.

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[For the Abstract, please see the PDF files below, namely "front.pdf"] CONTENTS. Chapter 1 Introduction. Chapter 2 Gross and microscopic visceral anatomy of the male Cape fur seal with reference to organ size and growth. Chapter 3 Age determination and growth in the male Cape fur seal: part one, external body. Chapter 4 Age determination and growth in the male Cape fur seal: part two, skull. Chapter 5 Age determination and growth in the male Cape fur seal: part three, baculum. Chapter 6 Suture age as an indicator of physiological age in the male Cape fur seal. Chapter 7 Sexual dimorphism in th

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10

De, Simone Matteo. "Interazione tra squalo bianco (Carcharadon carcharias) e otaria orsina del Capo (Arctocephalus pusillus pusillus) nell'area di Seal Island a Mossel Bay, Sud Africa." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8327/.

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Gli squali bianchi sono tra i più importanti predatori dei Pinnipedi (Klimley et al., 2001; Kock, 2002). La loro principale strategia di caccia consiste nel pattugliare le acque circostanti ad una colonia di otarie e nell’attaccarle quando queste sono in movimento, mentre si allontanano o avvicinano all’isola (Klimley et al., 2001; Kock, 2002). Tuttavia, la strategia e la dinamica della predazione osservate anche in relazione al ciclo riproduttivo della preda e le tattiche comportamentali messe in atto dalla preda per ridurre la probabilità di predazione, e quindi diminuire la sua mortalità,

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11

Stewardson, Carolyn Louise. "Biology and conservation of the Cape (South African) fur seal arctocephalus pusillus pusillus (Pinnipedia: Otariidae)from the Eastern Cape Coast of South Africa /." View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20030124.162757/index.html.

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12

De, Vos Alta. "Anti-predator behaviour of Cape fur seals Arctocephalus pusillus pusillus in relation to predation by white sharks Carcharodon carcharias around Seal Island, False Bay, South Africa." Doctoral thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/10423.

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Includes bibliographical references (leaves 161-202).<br>How predators affect the behaviour of their prey is one of the most studied subjects in behavioural ecology, with many hypothesis and models explaining how animals should behave and even more descriptive studies detailing how they do. The unification of the empirical with the theoretical, however, remains limited. The overall aim of my thesis was to address this paucity at Seal Island, South Africa, where recently quantified patterns of predation pressure by white sharks Carcharodon carcharias on Cape fur seals Arctocephalus pusillus pus

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13

Mison-Jooste, Valérie. "Contribution à l'étude de la biologie des populations de l'otarie à fourrure du Cap (Arctocephalus pusillus pusillus) : les soins maternels diffèrent-ils en fonction du sexe du jeune ?" Lyon 1, 1999. http://www.theses.fr/1999LYO10079.

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Le premier objectif de ce travail est l'etablissement d'une monographie sur l'otarie a fourrure du cap, explorant les caracteristiques des periodes de reproduction, de gestation et de lactation de cette espece et apportant des resultats originaux en particulier sur la croissance ftale, la duree de gestation, la croissance, la survie juvenile et le sevrage. Cette espece vit dans un environnement regule par le systeme d'upwelling du benguela et la production de ce systeme presente des variations inter-annuelles de tres forte amplitude. Ainsi, en 1994 le reseau trophique du benguela a ete atteint

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14

Pillay, Pavitray. "Competition for anchovy (Engraulis capensis) and sardine (Sardinops sagax) between the Cape Gannet (Morus capensis), Cape fur seal (Arctocephalus pusillus pusillus) and the purse-seine fishery on the west coast of South Africa." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/7422.

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Bibliography : leaves 59-65.<br>Competition for pelagic ﬁsh resources was investigated by assessing the overlap in the food base of three land-based predators: Cape gannet (Morus capensis), Cape fur seal (Arctocephalus pusillus pusillus) and humans operating via a purse-seine ﬁshery. Multivariate analysis the diet composition of gannets and seals and the catch composition of the pelagic ﬁshery indicated that there were three ""feeding regimes"" during the 21-year study period: (1978-1998), an anchovy-dominated regime (1978-1983), an intermediate regime (1984-1990) and a sardine-abundant regime

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15

Jewell, Oliver Joseph David. "Foraging ecology of white sharks Carcharodon carcharias at Dyer Island, South Africa." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/30926.

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Dyer Island is thought to host one of the most abundant populations of white sharks on the planet; this is often credited to the large (55 – 60,000) Cape fur seal colony at Geyser Rock. Yet relatively little work has ever been produced from the area. This may be attributed to the harshness in its location as a study site, exposed to wind and swell from west to east which limits research periods. This study accounts for over 220 hrs of manual tracking at Dyer Island with a further 68 added from the inshore shallow areas of the bay. Sharks focused their movements and habitat use to reefs

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16

Leal, Miriam Oliveira. "Descrição da doença oncológica em Arctocephalus pusillus pusillus- estudo realizado num parque zoológico." Master's thesis, 2016. http://hdl.handle.net/10437/7448.

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Orientação : Pedro Faísca ; co-orientação : Carla Flanagan<br>A casuística da doença oncológica relatada em pinípedes, tem sido crescente nos últimos anos. No entanto, o desenvolvimento desta área continua com bastantes lacunas devido à inexistência de estudos comparativos que estabeleçam padrões de incidência, prevalência e patofisiologia em animais provenientes de ambiente selvagem e sob cuidados humanos. Com a presente dissertação procurámos identificar a doença oncológica em Arctocephalus pusillus pusillus, descrevendo-a, e identificando diferentes tipos de neoplasias nestes animais

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17

Odendaal, Paul Nielen. "Seasonal changes in the ovarian structure of the cape fur seal (Arctocephalus pusillus pusillus)." Diss., 2000. http://hdl.handle.net/2263/30147.

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18

Lã, Mariana Vieira 1988. "The effectiveness of environmental enrichment in two captive south-african fur seals (Arctocephalus pusillus pusillus)." Master's thesis, 2012. http://hdl.handle.net/10451/7523.

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Tese de mestrado. Biologia (Biologia da Conservação). Universidade de Lisboa, Faculdade de Ciências, 2012<br>A otária Sul-Africana (Arctocephalus pusillus pusillus) é uma subespécie encontrada em zoos por todo o mundo, que se adapta geralmente bem a condições de cativeiro, reproduzindo-se com frequência. Não se encontra ameaçada pelo que, tal como a maioria dos pinípedes, é mantida em zoos principalmente por ser emblemática e ter um papel importante na atração e sensibilização dos visitantes. Apesar de potencialmente controversa, a manutenção de animais em cativeiro é o que permite aos zoos de

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19

Massei, Karina. "A alimentação de otárias-do-cabo (Arctocephalus pusillus pusillus (Schreber, 1776) num parque zoológico: aspectos energéticos, digestão e variações comportamentais." Master's thesis, 2002. http://hdl.handle.net/10400.1/14573.

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Numa boa prática de manutenção de mamíferos marinhos em condições artificiais é importante acompanhar cuidadosamente a alimentação e os seus efeitos na evolução do peso dos animais, em articulação com outras variáveis ambientais. Este trabalho consiste num estudo de alimentação com dez leões marinhos da espécie Arctocephalus pusillus pusillus (5 machos adultos, 2 fêmeas adultas e 3 machos juvenis) no parque oceanográfico Zoomarine (Albufeira, Portugal). Os objectivos foram a determinação dos valores calóricos das espécies de produtos da pesca usadas na alimentação destes animais e os seus ef

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20

Stewardson, Carolyn Louise. "Biology and conservation of the Cape (South African) fur seal Arctocephalus pusillus pusillus (Pinnipedia: Otariidae) from the Eastern Cape Coast of South Africa." Phd thesis, 2001. http://hdl.handle.net/1885/48199.

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Chapter 1 Introduction. Chapter 2 Gross and microscopic visceral anatomy of the male Cape fur seal with reference to organ size and growth. Chapter 3 Age determination and growth in the male Cape fur seal: part one, external body. Chapter 4 Age determination and growth in the male Cape fur seal: part two, skull. Chapter 5 Age determination and growth in the male Cape fur seal: part three, baculum. Chapter 6 Suture age as an indicator of physiological age in the male Cape fur seal. Chapter 7 Sexual dimorphism in the adult Cape fur seal: standard body length and skull morphology. Chapter 8 Repro

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21

Wiesel, Ingrid [Verfasser]. "Predatory and foraging behaviour of Brown Hyenas (Parahyaena brunnea (Thunberg, 1820)) at Cape Fur Seal (Arctocephalus pusillus pusillus Schreber, 1776) colonies / by Ingrid Wiesel." 2007. http://d-nb.info/982556756/34.

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