The trophic ecology of the endangered endemic Barau's Petrel (Pterodroma baraui) from Reunion Island, south-western Indian Ocean
- Authors: Danckwerts, Daniel Keith
- Date: 2015
- Subjects: Petrels -- Réunion , Pterodroma baraui , Ecology -- Réunion
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5925 , http://hdl.handle.net/10962/d1017803
- Description: Réunion is the only tropical island that supports two endemic gadfly petrels. Population modelling has indicated that the current threats to the Barau’s Petrel (Pterodroma baraui) may drive it to extinction; this fate is almost definite for the Mascarene Petrel (Pseudobulweria aterrima). Management interventions have therefore been implemented, but conservation potential is handicapped since virtually nothing is known about the former species’ at-sea biology. Thus, following numerous recommendations, this study aimed to combine stomach content, stable isotope, and fatty acid analyses so to provide new information on the at-sea ecology of Barau’s Petrel. Breeding colonies were repeatedly visited over the same season and samples gathered from adults, fledglings, and downy chicks. Stomach contents consisted mostly of accumulated cephalopod beaks whereas structures from fishes, molluscs, arthropods, and crustaceans were less frequently encountered. Fatty acid profiles of blood varied greatly among individuals and the lowincidences of monounsaturated and n-3 fatty acids discounted fish as an important dietary component. δ¹⁵N of blood indicated a niche between the fourth and fifth trophic levels, which proposes that these birds scavenge to a greater degree than other sympatric seabirds and suggests that adults are also reliant on their endogenous reserves during breeding. δ¹³C values confirmed the migratory behaviour of adults since birds returning from the non-breeding grounds were enriched relative to individuals sampled through the breeding period. Significant intra-breeding season variations in δ13C were also observed, which matched this species’ patterns of habitat use as have recently described. These results collectively indicate an opportunistic behaviour, which implies some degree of resilience against shifts in prey availability/accessibility, and suggest that this species’ reproduction isdependent on distant foraging areas. This breeding strategy is synonymous with great vulnerability as over-investing into a single breeding episode may jeopardize future survival and fecundity. Thus, in light of environmental conditions that are becoming increasingly more susceptible to dramatic changes, the birds could rather be prioritising adult survival, over reproductive output. Further work is obviously necessary and should benefit from databases of fatty acid profiles and isotope signatures of potential prey species.
- Full Text:
- Date Issued: 2015
- Authors: Danckwerts, Daniel Keith
- Date: 2015
- Subjects: Petrels -- Réunion , Pterodroma baraui , Ecology -- Réunion
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5925 , http://hdl.handle.net/10962/d1017803
- Description: Réunion is the only tropical island that supports two endemic gadfly petrels. Population modelling has indicated that the current threats to the Barau’s Petrel (Pterodroma baraui) may drive it to extinction; this fate is almost definite for the Mascarene Petrel (Pseudobulweria aterrima). Management interventions have therefore been implemented, but conservation potential is handicapped since virtually nothing is known about the former species’ at-sea biology. Thus, following numerous recommendations, this study aimed to combine stomach content, stable isotope, and fatty acid analyses so to provide new information on the at-sea ecology of Barau’s Petrel. Breeding colonies were repeatedly visited over the same season and samples gathered from adults, fledglings, and downy chicks. Stomach contents consisted mostly of accumulated cephalopod beaks whereas structures from fishes, molluscs, arthropods, and crustaceans were less frequently encountered. Fatty acid profiles of blood varied greatly among individuals and the lowincidences of monounsaturated and n-3 fatty acids discounted fish as an important dietary component. δ¹⁵N of blood indicated a niche between the fourth and fifth trophic levels, which proposes that these birds scavenge to a greater degree than other sympatric seabirds and suggests that adults are also reliant on their endogenous reserves during breeding. δ¹³C values confirmed the migratory behaviour of adults since birds returning from the non-breeding grounds were enriched relative to individuals sampled through the breeding period. Significant intra-breeding season variations in δ13C were also observed, which matched this species’ patterns of habitat use as have recently described. These results collectively indicate an opportunistic behaviour, which implies some degree of resilience against shifts in prey availability/accessibility, and suggest that this species’ reproduction isdependent on distant foraging areas. This breeding strategy is synonymous with great vulnerability as over-investing into a single breeding episode may jeopardize future survival and fecundity. Thus, in light of environmental conditions that are becoming increasingly more susceptible to dramatic changes, the birds could rather be prioritising adult survival, over reproductive output. Further work is obviously necessary and should benefit from databases of fatty acid profiles and isotope signatures of potential prey species.
- Full Text:
- Date Issued: 2015
An investigation into school learners' perceptions of linguistic politeness norms within and across cultures
- Authors: Kenyon, Tracy Karen
- Date: 2004 , 2013-05-31
- Subjects: Language policy -- South Africa , Multilingualism -- South Africa -- Eastern Cape , Language and education -- South Africa -- Eastern Cape , Language and culture -- South Africa -- Eastern Cape , Multiculturalism -- South Africa -- Eastern Cape , Social interaction -- South Africa -- Eastern Cape , Sociolinguistics -- South Africa -- Eastern Cape , Intercultural communication -- South Africa -- Eastern Cape , Speech acts (Linguistics)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2371 , http://hdl.handle.net/10962/d1004715 , Language policy -- South Africa , Multilingualism -- South Africa -- Eastern Cape , Language and education -- South Africa -- Eastern Cape , Language and culture -- South Africa -- Eastern Cape , Multiculturalism -- South Africa -- Eastern Cape , Social interaction -- South Africa -- Eastern Cape , Sociolinguistics -- South Africa -- Eastern Cape , Intercultural communication -- South Africa -- Eastern Cape , Speech acts (Linguistics)
- Description: The assumption underlying this study is that cultures differ in terms of politeness norms. Often people from different cultures approach one another in what they think is an appropriate manner and the outcome is miscommunication. This may be attributed to differing cultural norms and this study aims to examine what a sample of school learners perceive to be polite behaviour when making requests and their reasons for doing so. This study focuses on perceived politeness norms (Brown and Levinson 1978) in English across selected South African cultures. The individuals are seen as reflecting a cultural identity, using norms that they feel are appropriate in given situations. Previous researchers have endeavoured to show that politeness norms are universal, but it has emerged that this is not always the case. When people from differing language and cultural backgrounds come into contact they have to find a common ground for their interaction to be successful (Lustig and Koester 1999). Of particular interest is the way people request things, both the way they phrase their request and their reasons for phrasing it this way. In order to investigate this, twenty-nine same-sex pairs of Grade 10 learners were selected from three schools with different cultural backgrounds in Grahamstown. These learners were required to complete a Discourse Completion Test, which contained both Think-Aloud and Retrospection Procedures, while they were being audio-taped. This data was transcribed and analysed using a model that was developed and adapted to describe request strategies. This data is shown through the use of basic statistics, even though it is primarily qualitative. The data is given this qualitative dimension by looking at the factors that the co-conversants attend to. The recorded data shows that although second language speakers of English have a formula for requesting things, they are not always able to articulate why they use the request strategies they do. It appears that English first language speakers and speakers who have English as an additional language request things similarly, but the first language speakers have access to a greater variety of politeness strategies. They also attend to different contextual features. This shows that while the need to be polite seems to be universal, the expectations of the speakers will be different and while a first language speaker of English would not misinterpret the force of a given speech act, they may feel that the person who has English as an additional language is rude. Sensitivity is therefore called for in order to combat mutual negative stereotyping and misunderstandings. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2004
- Authors: Kenyon, Tracy Karen
- Date: 2004 , 2013-05-31
- Subjects: Language policy -- South Africa , Multilingualism -- South Africa -- Eastern Cape , Language and education -- South Africa -- Eastern Cape , Language and culture -- South Africa -- Eastern Cape , Multiculturalism -- South Africa -- Eastern Cape , Social interaction -- South Africa -- Eastern Cape , Sociolinguistics -- South Africa -- Eastern Cape , Intercultural communication -- South Africa -- Eastern Cape , Speech acts (Linguistics)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2371 , http://hdl.handle.net/10962/d1004715 , Language policy -- South Africa , Multilingualism -- South Africa -- Eastern Cape , Language and education -- South Africa -- Eastern Cape , Language and culture -- South Africa -- Eastern Cape , Multiculturalism -- South Africa -- Eastern Cape , Social interaction -- South Africa -- Eastern Cape , Sociolinguistics -- South Africa -- Eastern Cape , Intercultural communication -- South Africa -- Eastern Cape , Speech acts (Linguistics)
- Description: The assumption underlying this study is that cultures differ in terms of politeness norms. Often people from different cultures approach one another in what they think is an appropriate manner and the outcome is miscommunication. This may be attributed to differing cultural norms and this study aims to examine what a sample of school learners perceive to be polite behaviour when making requests and their reasons for doing so. This study focuses on perceived politeness norms (Brown and Levinson 1978) in English across selected South African cultures. The individuals are seen as reflecting a cultural identity, using norms that they feel are appropriate in given situations. Previous researchers have endeavoured to show that politeness norms are universal, but it has emerged that this is not always the case. When people from differing language and cultural backgrounds come into contact they have to find a common ground for their interaction to be successful (Lustig and Koester 1999). Of particular interest is the way people request things, both the way they phrase their request and their reasons for phrasing it this way. In order to investigate this, twenty-nine same-sex pairs of Grade 10 learners were selected from three schools with different cultural backgrounds in Grahamstown. These learners were required to complete a Discourse Completion Test, which contained both Think-Aloud and Retrospection Procedures, while they were being audio-taped. This data was transcribed and analysed using a model that was developed and adapted to describe request strategies. This data is shown through the use of basic statistics, even though it is primarily qualitative. The data is given this qualitative dimension by looking at the factors that the co-conversants attend to. The recorded data shows that although second language speakers of English have a formula for requesting things, they are not always able to articulate why they use the request strategies they do. It appears that English first language speakers and speakers who have English as an additional language request things similarly, but the first language speakers have access to a greater variety of politeness strategies. They also attend to different contextual features. This shows that while the need to be polite seems to be universal, the expectations of the speakers will be different and while a first language speaker of English would not misinterpret the force of a given speech act, they may feel that the person who has English as an additional language is rude. Sensitivity is therefore called for in order to combat mutual negative stereotyping and misunderstandings. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2004
Ambivalence and paradox : the battered woman's interactions with the law and other helping resources
- Authors: Labe, Dana
- Date: 2001
- Subjects: Family violence -- Law and legislation , Abused women , Wife abuse , Women -- Crimes against , Women -- Counseling of , Family violence -- Prevention
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:699 , http://hdl.handle.net/10962/d1006424 , Family violence -- Law and legislation , Abused women , Wife abuse , Women -- Crimes against , Women -- Counseling of , Family violence -- Prevention
- Description: This thesis explores how the battered woman attachment to her abusive partner impacts on her interactions with the legal system and non-legal resources. This qualitative research project is based on in-depth interviews conducted with seven abused women who procured interdicts in terms of the Prevention of Family Violence Act 133 of 1993 to restrain their husbands from assaulting them. The research reviews the nature of abuse suffered by the participants, their psychological attachments to their husbands, and their patterns of help-seeking in relation to the law and non-legal resources. Two main theoretical frameworks, psychoanalysis and feminism inform this study. The study found that the participants retained unrealistic hopes that their husbands would reform and become loving, caring partners, and that they treated their husbands with care and sympathy despite their husbands’ often brutal behaviour towards them. The findings suggest that the women’s behaviour towards their husbands was the product of two reality distorting psychological defences, splitting and the moral defence which they used to preserve their attachments to their abusive partners. These defences intersected with rigid patriarchal prescriptions of femininity which dictate that women should be stoically caring towards their husbands, and should hold relationships together no matter what the cost to themselves. The participants interactions with the legal system and with non-legal sources of help were structured by their reliance on splitting and the moral defence, and by the dictates of patriarchal ideology. Whilst it is undoubtedly true that at one level the participants sought help to get protection from abuse, the study shows that their help-seeking was motivated by their conflicting desires to punish and reform their husbands. The participants sought help in ways which enabled them to strike a compromise between expressing their anger at their husbands, whilst simultaneously preserving their psychological attachments to them. The study concludes that the women’s interactions with the law and with other helping resource reflect their attempts to preserve their paradoxical attachments to their husbands, and to stabilise their own fragile sense of self and gender identity
- Full Text:
- Date Issued: 2001
Ambivalence and paradox : the battered woman's interactions with the law and other helping resources
- Authors: Labe, Dana
- Date: 2001
- Subjects: Family violence -- Law and legislation , Abused women , Wife abuse , Women -- Crimes against , Women -- Counseling of , Family violence -- Prevention
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:699 , http://hdl.handle.net/10962/d1006424 , Family violence -- Law and legislation , Abused women , Wife abuse , Women -- Crimes against , Women -- Counseling of , Family violence -- Prevention
- Description: This thesis explores how the battered woman attachment to her abusive partner impacts on her interactions with the legal system and non-legal resources. This qualitative research project is based on in-depth interviews conducted with seven abused women who procured interdicts in terms of the Prevention of Family Violence Act 133 of 1993 to restrain their husbands from assaulting them. The research reviews the nature of abuse suffered by the participants, their psychological attachments to their husbands, and their patterns of help-seeking in relation to the law and non-legal resources. Two main theoretical frameworks, psychoanalysis and feminism inform this study. The study found that the participants retained unrealistic hopes that their husbands would reform and become loving, caring partners, and that they treated their husbands with care and sympathy despite their husbands’ often brutal behaviour towards them. The findings suggest that the women’s behaviour towards their husbands was the product of two reality distorting psychological defences, splitting and the moral defence which they used to preserve their attachments to their abusive partners. These defences intersected with rigid patriarchal prescriptions of femininity which dictate that women should be stoically caring towards their husbands, and should hold relationships together no matter what the cost to themselves. The participants interactions with the legal system and with non-legal sources of help were structured by their reliance on splitting and the moral defence, and by the dictates of patriarchal ideology. Whilst it is undoubtedly true that at one level the participants sought help to get protection from abuse, the study shows that their help-seeking was motivated by their conflicting desires to punish and reform their husbands. The participants sought help in ways which enabled them to strike a compromise between expressing their anger at their husbands, whilst simultaneously preserving their psychological attachments to them. The study concludes that the women’s interactions with the law and with other helping resource reflect their attempts to preserve their paradoxical attachments to their husbands, and to stabilise their own fragile sense of self and gender identity
- Full Text:
- Date Issued: 2001
A study of the vegetation of the Andries Vosloo Kudu Reserve, Cape Provice
- Authors: Palmer, Anthony Riordan
- Date: 1981 , 2013-04-18
- Subjects: Botany -- South Africa -- Eastern Cape , Lubke, R.A.
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4244 , http://hdl.handle.net/10962/d1007284 , Botany -- South Africa -- Eastern Cape
- Description: The plant communities of the Andries Vosloo Kudu Reserve (6493 ha.; Acocks's Valley Bushveld) are classified using the Braun-Blanquet phytosociological technique. A checklist of the flowering plants is presented. The flora of the reserve displays an affinity to five phytochoria (Capensis, Karoo-Namib, Sudano-Zambezian, Afro-montane and Indian Ocean Coastal Belt 1, of which the Karoo-Namib and Indian Ocean Coastal Belt are the most extensive. The flora of the Valley Bushveld is regarded as adequately conserved, but a recommendation is made to consolidate the study area with adjacent farms. A small herbarium, containing specimens of all species listed in the checklist, has been established. The climate of the study area is classified according to the Koppen classification as Cfa. Simultaneous air temperature recording at four separate localities demonstrated that differences exist between local ities of marginally different altitude, aspect and slope. The phenology of 51 plant species, recorded at monthly intervals over a continuous period of 478 days, is presented. These species are classified according to their response to air temperature and rainfall for the initiation of new growth, flowering and fruiting. Species exhibited a spectrum of responses ranging from endogenous to exogenous control over phenological events. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
- Full Text:
- Date Issued: 1981
- Authors: Palmer, Anthony Riordan
- Date: 1981 , 2013-04-18
- Subjects: Botany -- South Africa -- Eastern Cape , Lubke, R.A.
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4244 , http://hdl.handle.net/10962/d1007284 , Botany -- South Africa -- Eastern Cape
- Description: The plant communities of the Andries Vosloo Kudu Reserve (6493 ha.; Acocks's Valley Bushveld) are classified using the Braun-Blanquet phytosociological technique. A checklist of the flowering plants is presented. The flora of the reserve displays an affinity to five phytochoria (Capensis, Karoo-Namib, Sudano-Zambezian, Afro-montane and Indian Ocean Coastal Belt 1, of which the Karoo-Namib and Indian Ocean Coastal Belt are the most extensive. The flora of the Valley Bushveld is regarded as adequately conserved, but a recommendation is made to consolidate the study area with adjacent farms. A small herbarium, containing specimens of all species listed in the checklist, has been established. The climate of the study area is classified according to the Koppen classification as Cfa. Simultaneous air temperature recording at four separate localities demonstrated that differences exist between local ities of marginally different altitude, aspect and slope. The phenology of 51 plant species, recorded at monthly intervals over a continuous period of 478 days, is presented. These species are classified according to their response to air temperature and rainfall for the initiation of new growth, flowering and fruiting. Species exhibited a spectrum of responses ranging from endogenous to exogenous control over phenological events. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
- Full Text:
- Date Issued: 1981
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