Massey Documents by Type

Permanent URI for this communityhttps://mro.massey.ac.nz/handle/10179/294

Browse

Has files: YesSubject: search.filters.subject.Hihi

Search Results

Now showing 1 - 10 of 12
  • Thumbnail Image
    Item
    Dispersal : the effects of phenotype and habitat selection in reintroduced populations : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Conservation Biology at Massey University, Manawatū, New Zealand
    (Massey University, 2015) Richardson, Kate Mackinnon
    Dispersal is a complex behaviour, recognised as the primary mechanism by which gene flow occurs. In the field of reintroduction biology, dispersal can influence reintroduction success both positively and negatively, yet the mechanisms underpinning dispersal in reintroduced populations are not well understood. Extensive literature is now available on the proximate forces driving natal dispersal, and in this thesis I draw on this field to inform our understanding of dispersal processes in reintroduced populations. It is widely accepted that both internal state (phenotype) and the external environment have multi-causal effects on natal dispersal patterns across three recognised phases of movement (departure, exploration, settlement), but the relationship to post-release dispersal is less well understood. I use reintroduced populations of an endangered passerine, the hihi (stitchbird, Notiomystis cincta), to answer specific research questions regarding the proximate factors driving both postrelease and natal dispersal in this species. I first examine phenotypic variation in behavioural traits (personality) in my study species, in particular the effects of early natal nutrition on the expression of personality, and the influences on subsequent survival and dispersal. I find complex relationships between natal nutrition and personality that are sex-specific, and that “bold” individuals have higher survival probabilities. I find evidence for a relationship between personality and natal dispersal patterns in one study population, but not in another. I then examine the influence of internal state (personality, early natal nutrition and degree of inbreeding) on post-release dispersal of newly translocated hihi at two sites, and find that all these factors affect dispersal behaviour in the initial post-release and exploration phases. I then examine the role of the external environment on both natal and post-release dispersal using species distribution models. There is a strong social effect in habitat selection of natal dispersers, but no detectable social effect in habitat selection of post-release dispersers, and evidence for use of physical characteristics of the environment in habitat selection at both stages. Finally, I discuss the wider implications of dispersal to reintroduction biology. I advocate for careful consideration of proposed release sites, and an integrated landscape approach within reintroduction planning.
  • Thumbnail Image
    Item
    Applying structured decision making to management of the reintroduced hihi population in Bushy Park :|ba thesis presented for the degree of Master of Science in Conservation Biology at Massey University, Palmerston North, New Zealand
    (Massey University, 2015) Panfylova, Iuliia
    The use of Structured Decision Making (SDM) for choosing optimal management actions in reintroduction projects has been recently pioneered by the North American whooping crane Grus americana programme. SDM requires projecting population dynamics under different scenarios to predict outcomes of management strategies. In this thesis, I applied SDM to a population of an endangered New Zealand forest bird, the hihi Notiomystis cincta, which was reintroduced to Bushy Park in March 2013 when 44 birds were released. My aim was to determine the optimal management of the Bushy Park population. The need of this decision was triggered by Bushy Park Trust application for additional translocation of 15 females in order to reinforce the population. The Hihi Recovery Group developed four fundamental objectives, which included maximizing the number and persistence of female hihi in Bushy Park as well as to minimize the impact on the source population on Tiritiri Matangi Island and minimizing costs; and three management alternative actions, including the status quo and follow-up translocations of 15 females in either 2015 or 2016. In order to project population dynamics under each alternative, I estimated the survival and reproduction rates of the Bushy Park population based on the 18 months of the monitoring data. Comparison of the survival rates of translocated juveniles and juveniles that were born in Bushy Park allowed distinguishing between age and post-release effects. Modelling indicated that translocated juveniles experienced post-release effects that resulted in the rapid population decline during the first 6 months. Survival rates were then used in population viability analysis in program OpenBUGS. An integrated population model was designed to model fecundity and the Bushy Park population dynamics over 10 years under the above-mentioned management alternatives. The median projections suggested a slow decline of the population under each management alternative, but with great uncertainty. I used the novel approach for decision analysis, whereby uncertainty was incorporated into the decision. In one single model I combined the released population, the source population and the Simple Multi-Attribute Rating Technique for decision analysis. This approach showed that none of the alternatives were clearly preferred and the decision was sensitive to uncertainty in the projections.
  • Thumbnail Image
    Item
    A genetic and behavioural investigation of extra-pair copulation in stitchbirds (Notiomystis cincta) breeding on Tiritiri Matangi Island : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Zoology at Massey University
    (Massey University, 1998) Ewen, John G
    Minisatellite DNA fingerprinting was used to assign parentage to nestlings produced by stitchbirds breeding on Tiritiri Matangi Island. Analysis revealed that 35% of nestlings were the result of extra-pair copulation (EPC) and that extra-pair young were present in 80% of nests. These results show that an individual's realised reproductive success is very different than that predicted from social relationships alone. Approximately half of the extra-pair fertilisations were by unpaired males. This is in contrast to the general trend in bird literature, which suggests extra-pair paternity is the result of copulations by males paired with other females. EPCs are resisted by females, hence EPC is assumed to be a male-driven reproductive behaviour. Extra-pair males concentrate their copulation attempts at peaks in female fertility. Regular visits made to nest boxes by extra-pair males may provide a cue to female fertility. Behaviour of extra-pair males suggests they also focus attempted EPCs on females at nest sites. Paired males attempt to defend their paternity by defending an area around the nest site by territorial calling and displacing intruding males. These paired males spend a majority of their time near the nest site, both when the female is present and absent. The frequency of EPC attempts varied substantially between nests, and these attempts were often witnessed by the paired male. This variation mirrored closely the variation in the percentage of extra-pair paternity. The level of nest provisioning by males was strongly correlated with the frequency of attempted EPCs, and was less strongly correlated with actual paternity. This suggests that paired males assess their paternity using behavioural cues rather than actually discriminating related from unrelated offspring. Although this thesis focuses on fundamental research, it is closely aligned to stitchbird conservation. The final chapter details management protocols used while monitoring stitchbirds for the first 18 months following translocation to Tiritiri Matangi. It details all management techniques believed to be important for gaining knowledge about the success/failure of this translocation, increasing public participation, and increasing the chances of success in establishing a self sustaining population.
  • Thumbnail Image
    Item
    Effects of food supply and competition on the outcome of hihi (Notiomystis cincta) translocated to Mokoia Island : a thesis presented to Massey University in partial fulfilment of the requirements for the degree of Master of Science in Zoology
    (Massey University, 1997) Perrott, John K
    The hihi or stitchbird (Notiomystis cincta) is a cavity-nesting honeyeater (family Meliphagidae) indigenous to New Zealand. Hihi were originally widespread but following European colonisation became confined to Little Barrier Island. Attempts to establish hihi on other islands appear to have been unsuccessful. The main reasons suggested for these failures are: (1) insufficient year round supply of nectar and fruit, (2) competition from the other more dominant honeyeaters (bellbirds Anthornis melanura, and tui Prosthemadera novaeseelandiae), and (3) lack of nesting cavities. This study was conducted on Mokoia Island, situated in Lake Rotorua. 40 hihi were translocated to Mokoia in September 1994 from Little Barrier Island. Two field-trips, lasting three to four days, were made to the island every month from August 1994 through October 1995. The primary aim of this study is to assess whether hihi suffer increased mortality, or lose weight due to seasonal shortages in their food supply, and therefore whether artificial food supplementation would be needed to sustain a population. The methods for testing this aim involved: (1) doing food supplementation experiments throughout the year (20% sugar solution), (2) measuring changes in bird's weights and mortality throughout the year, when supplementary food was available vs unavailable, (3) measuring nectar and fruit availability throughout the year as energy per unit area (e.g., kJ/ha), and (4) observing hihi to determine the amounts of time spent feeding on nectar, fruit, and invertebrates, and any interference from tui whilst feeding at those sources. These data allowed me to identify periods when hihi were most limited by the naturally occurring nectar/fruit supply on Mokoia. This 'limitation' is measured in terms of changes in birds body mass, survival, reproduction, and foraging effort in response to food supplementation. These data allow me to make recommendations concerning further supplementary feeding, and planting programs on Mokoia to make the habitat more suitable to hihi.
  • Thumbnail Image
    Item
    The anatomy and histomorphology of the uropygial gland in New Zealand endemic species : a thesis presented in partial fulfilment of the requirements for the degree of Master of Zoology at Massey University, Palmerston North, New Zealand
    (Massey University, 2013) Reynolds, Sian
    Considering that there are more than 10,000 species of birds on earth, and that the uropygial gland is the most prominent integument gland in this vertebrate group, it is puzzling that little is known about its morphology and function. The current hypotheses for the function of the uropygial gland can be placed into four groups: 1) feather maintenance; 2) water-proofing; 3) intraspecific communication/health; and 4) defence against predators and/or parasites. Several studies have examined these hypotheses, although no general function for the uropygial gland has been established. This thesis aimed at reducing the gap in knowledge of the uropygial gland by investigating New Zealand birds. The purpose of this study was to examine the anatomical and histological structure of the uropygial gland in New Zealand birds and to investigate the defence hypothesis as a function of the gland specifically in brown kiwi (Apteryx mantelli). Anatomical and histological analyses of the uropygial glands from brown kiwi, great spotted kiwi (Apteryx haastii), hihi (Notiomystis cincta), New Zealand bellbirds (Anthornis melanura), tui (Prosthemadera novaeseelandiae), and saddleback (Philesturnus carunculatus) were carried out. The anatomy and histology of all glands were compared both within family and order and to those available from other species worldwide. The defence hypothesis function of the uropygial gland was investigated using the tick species Ixodes anatis from the skin of brown kiwi. This study revealed a range of uropygial gland characteristics in the kiwi, hihi, New Zealand bellbird, tui, and saddleback that were not know to previously exist in other species. For example kiwi uropygial glands were found to possess eight primary sinuses. Comparison of the New Zealand passerines revealed that bellbirds possess the largest gland in relation to body size out of the four species. The uropygial secretion of brown kiwi may play a role in parasite repellence as both males and female ticks were deterred from the secretion. Based on histomorphology I suggest that rather than a single function, the gland may have species/group functions. However, this hypothesis still remains enigmatic due to the lack of birds studied to date.
  • Thumbnail Image
    Item
    The behavioral ecology of forced copulation in the New Zealand stitchbird (Hihi) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Zoology at Massey University, Palmerston North, New Zealand
    (Massey University, 2004) Low, Matthew Richard
    Although many vertebrate species form stable breeding partnerships, extra-pair copulations are often common in these species, potentially leading to intersexual conflict. Forced copulation or rape is an extreme manifestation of this conflict, occurring when a female is forced to copulate with a male despite her resistance. In this thesis, I report research addressing several questions about forced copulation in stitchbirds (Notiomystis cincta), a species with frequent forced copulation attempts. I conducted this research over three years on Tiritiri Matangi Island, off New Zealand's northeast coast. Forced copulation was used opportunistically by all males in the population, and male age and morphometrics did not predict forced copulation success or the likelihood of female consent. A newly proposed hypothesis to explain the function of forced copulation in birds, the 'creation of a dangerous environment' hypothesis, was not supported empirically and in its current form appears to be theoretically unworkable. Male stitchbirds seem able to bypass female choice through adopting a face-to-face forced copulation position. This is effective because their cloacae become engorged with sperm, and act similarly to a penile erection to allow cloacal contact when copulating in this species' unique face-to-face position. Forced copulation attempts occurred mainly during females' fertile periods immediately before egg laying, and this was strongly correlated with an increase in female weight, suggesting that males use the weight of the female to judge her fertility status. Resident males also adjusted their behaviour at this time, switching from a territorial site-specific defence to a mate-guarding tactic localising on the position of the female. While costs associated with forced copulation have been previously documented for females, I show that the resident male also suffers a cost as measured by a 5% loss of bodyweight as a result of extra-pair male territorial intrusions on top of a 2.5% weight loss as a result of mate guarding. The resident male's uncertainty of paternity resulting from extra-pair forced copulation had little effect on provisioning by paired males. The key factors affecting male provisioning were brood size (males did not provision one-chick broods) and whether the male was monogamous or polygynous (males only fed the brood of their primary female). Cross-species comparisons can be useful in understanding the function of forced copulation if carefully undertaken, with previous criticism of this approach based on numerous misunderstandings.
  • Thumbnail Image
    Item
    Behavioural ecology and management of Hihi (Notiomystis cincta), an endemic New Zealand honeyeater : a thesis presented in partial fulfilment of the requirements for the degree of PhD in Ecology at Massey University
    (Massey University, 1995) Castro, Isabel
    This thesis is concerned with the release techniques, post-release survival and behavioural ecology of hihi (Notiomystis cincta), a rare New Zealand honeyeater. It aims at offering management strategies for translocated populations. The only self-sustaining population of hihi exists on Little Barrier Island. The New Zealand Department of Conservation is trying to establish self-sustaining populations elsewhere. In 1991 and 1992 hihi transfers to Kapiti Island were approached in an experimental way. Experiments provided four main conclusions: (1) immediate-release birds survived better than delayed-release birds; (2) there was no difference between the survival of birds released in pairs or in a group; (3) hihi released in the absence of resident conspecifics survived better than those released in their presence; and (4) birds released in the absence of resident conspecifics moved to an area with residents in three days. The breeding system of hihi is highly variable, including monogamy, polyandry, polygyny and polygynandry. Males have physical features found in other species with highly variable mating systems. Male and female hihi benefit from a mixed reproductive strategy where a female hihi can solicit copulations from males other than her partner and male hihi can perform extra-pair copulations both with willing females or by forced copulation. Field tests aimed at determining the influence of the distribution of food and nest sites on the choice of mating system by hihi are proposed. The phenology of a selected group of plants, important as honeyeater food, was followed from 1992 to 1994. The onset and length of the flowering and fruiting periods for particular plant species varied between the years. The number of fruits and flowers per tree also varied. Hihi egg laying periods coincided with the period of greatest flowering. Hihi breeding success was low every year. In 1993-94 there was great competition for nest sites with kakariki Cyanoramphus novaezelandiae. It is suggested that hihi failure to establish self-sustaining populations on Kapiti Island is mainly the result of competition for nest sites and food limitation. It is recommended that feeding stations and nesting boxes are established in three different areas of the island. Food should be provided during the breeding season. The quality of nectar in some small flowers, and the rate of flower visitation by hihi, tui Prosthemadera novaezelandiae and bellbirds Anthornis melanura to those flowers were measured. The estimated nectar consumption rate for all flowers was enough to sustain hihi and bellbirds' energetic requirements. It is suggested that honeyeaters might play a previously unrecognised but important role in pollination. Forest regeneration on the New Zealand mainland could be hampered by the loss of hihi and serious reduction in the abundance of tui and bellbirds. Necessary studies to elucidate the role of honeyeaters in pollination are offered.
  • Thumbnail Image
    Item
    The ecology of Aspergillus fumigatus and implications for wildlife conservation in modified environments : a thesis presented to Massey University in partial fulfilment of the requirements for the degree of Ph.D. in Ecology, Institute of Natural Resources, Massey University
    (Massey University, 2001) Perrott, John K.
    This thesis outlines my research since 1998 into inter-trophic interactions between pathogenic fungi, insects, birds, and the environment. Chapter One is a stand-alone investigation into fungal diseases associated with native cicadas on Mokoia Island (Lake Rotorua) and the Eastwoodhill Arboretum (Gisborne). Chapters Two through Four are specifically concerned with the natural occurrence of the pathogenic fungus Aspergillus fumigatus and its connection to hihi (or stitchbird) on Little Barrier Island (northern Hauraki Gulf), Mokoia Island, Tiritiri Matangi Island (Hauraki Gulf), and the Mt Bruce Wildlife Centre (near Masterton). The hihi (Notiomystis cincta) is a small (i.e., starling sized) cavity-nesting honeyeater endemic to New Zealand. Following European colonisation, hihi became extinct everywhere except on Little Barrier Island, making the future of this species very uncertain. In response to this situation there have been several translocations of hihi to Hen, Cuvier, Kapiti, Mokoia and Tiritiri Matangi Islands from 1980 to 1996. While hihi on Tiritiri Matangi seem to be progressing well with intensive management, all previous translocations to other islands have failed to establish self-sustaining populations. The main hypotheses given to explain these failures are insufficient year-round supply of nectar and fruit, and lack of suitable nesting cavities. Hihi were translocated to Mokoia Island in September 1994 with nest boxes provided. However, like past translocations, hihi have continued to decline on the island with high annual mortality rates above 50%. It is not clear what factors are contributing to this high mortality rate. My MSc studies carried out on Mokoia Island during 1994-1997 demonstrated that hihi had a good year-round supply of food, and were not dying as a result of starvation. Subsequent post-mortem examinations by Professor Alley of sick and dead hihi from Mokoia from 1995-1997 has revealed that the fungal disease aspergillosis, caused by Aspergillus fumigatus, is the most common cause of death among those birds. In addition, captive hihi at the Mt Bruce Wildlife Centre also suffer high rates of aspergillosis, and there is presently concern regarding the susceptibility of hihi to this fungal disease. This study suggests also that past hihi translocations have failed due, in part, to birds being exposed to elevated levels of disease-causing microorganisms. Aspergillus fumigatus is an ubiquitous fungus, and common aspergillosis-causing pathogen in birds and mammals. Infection takes place following the aspiration of fungal spores, and is primarily a respiratory disease. Aspergillus infections are usually considered to be opportunist following other primary infections, immunosuppression or stressful environmental conditions. Small numbers of spores can usually be tolerated by the immune system, but large numbers can cause disease and death. At present, prevention is the only effective method of controlling aspergillosis in wild bird populations. This project is concerned with studying the ecology of A. fumigatus, and identifying the most likely source/s of infection in hihi. Therefore, this project is directed towards identifying the most likely source/s of A. fumigatus rather than the most likely causes ot aspergillosis in hihi. In doing so, the primary aim of this project is to investigate whether previous hihi translocations from Little Barrier Island to young growth forests and forest edge habitats have been exposing birds to elevated levels of A. fumigatus, and therefore, whether A. fumigatus preventative management should be considered when planning future hihi translocations. This project aimed to, A) determine whether habitat disturbance encourages the establishment of A. fumigatus in the environment B) measure and compare A. fumigatus densities from early growth regenerating forests (i.e., Mokoia and Tiritiri Matangi Islands), a pristine mature forest (i.e., Little Barrier Island), and two mainland forest locations (i.e., Mt Bruce Wildlife Centre, and the Massey University Campus) C) measure and compare A. fumigatus densities in forest edge habitats and inner forest locations. D) investigate whether hihi nest boxes on Mokoia Island and natural tree cavity-nests on Little Barrier Island are promoting the growth of A. fumigatus and, E) investigate various types of forest disturbance events that could account for the differences in A. fumigatus densities found between study sites. Results from Chapter One describe a unique and previously unreported cicada disease caused by a Conidiobolus fungus on Mokoia Island. Results from Chapters Two and Three report elevated levels of A. fumigatus on Mokoia Island and at the Mt Bruce Wildlife Center. Low levels of A. fumigatus were recorded on Little Barrier Island, and moderate levels recorded for Tiritiri Matangi Island. Results indicate that forest disturbance promotes the abundance of A. fumigatus in the environment, and that forest edge habitats have significantly higher levels of A. fumigatus compared to inner forest locations. This suggests that forest disturbance alters natural disease dynamics, and increases bird's exposure to opportunistic disease-causing agents such as A. fumigatus. These results, in part, illustrate the functional significance of old growth forests in keeping weedy pest species like A. fumigatus in check. Results from Chapter Four report that hihi are exposed to elevated levels of airborne A. fumigatus spores while in the nest box. Additionally, results indicate that hihi re-using old nest sites would further suffer increased exposure to A. fumigatus spores. Because hihi are a vulnerable species, and seem to be particularly susceptible to aspergillosis, the conservation value of this work is high. This study was made possible by grants from the J.S.Watson Conservation Trust, Massey University Graduate Research Fund, and the World Wide Fund for Nature, and furthers our understanding of mortality factors affecting free-living birds, and provides new information on the ecology of this common wildlife disease. The broader implications of this work for managing wildlife, particularly birds in New Zealand forests are also explored. The relationship between clear-felling forest regrowth, and the incidence of aspergillosis may be the key to understanding the fate of bird populations reintroduced into forests, and determine the viability of "mainland islands".
  • Thumbnail Image
    Item
    Resource partitioning between two competitive species, the hihi (Notiomystis cincta) and bellbird (Anthornis melanura), during the non-breeding season on Tiritiri Matangi Island : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand
    (Massey University, 2012) Roper, Michelle
    Understanding the level of competition and resource partitioning between New Zealand’s ecological honeyeaters is important for hihi (Notiomystis cincta) conservation management. Hihi management on Tiritiri Matangi Island has been thought to be hindered by competition with bellbirds (Anthornis melanura), particularly at the supplementary sugar water feeders. With some inconsistent results in differences between their foraging ecology at different locations and seasons, I collected data on the foraging ecology of both hihi and bellbirds on Tiritiri Matangi Island to compare with previous studies at other locations. Nectar was the main constituent of both species diet with fruit only being consumed in the autumn-winter months for both species. The main difference between the species was that hihi consumed more fruit than bellbirds and bellbirds consumed honeydew. Bellbirds foraged more in the higher vegetation layers and on higher nectar value flowers than hihi which corresponded with previous studies. This suggested that resource partitioning is likely to be in the form of bellbirds defending the best resources of higher nectar value in the higher vegetation layers with interference competition and hihi obtain resources with exploitation competition by utilising flowers which are often smaller, less abundant or produce less nectar in the lower vegetation layers. Male bellbirds and hihi were the most frequent visitors to the supplementary feeders. With few interspecific interactions it suggests that male bellbirds are unable to defend the feeders due to the feeders being overwhelmed with hihi and also showing how dependent hihi are on supplementary feeding. Female bellbirds were the least frequent visitors suggesting that intraspecific competition is greater at the feeders but only for bellbirds as there was little evidence of high competition between the hihi sexes. There may be some resource partitioning between habitat types as hihi were consistently found at higher densities in the mature forest habitat likely due to their dependence on the feeders and artificial nest boxes, whereas bellbird densities changed with resource availability and breeding season territoriality. The densities of both species were affected by the presence of feeders and nectar availability with positive correlation between the species in the non-breeding season, suggesting that hihi habitat preference was not affected by competitive exclusion from bellbirds. The removal of 100 bellbirds for a translocation had no evident impact on hihi and bellbird densities at capture sites.
  • Thumbnail Image
    Item
    Gastrointestinal parasites in endemic, native, and introduced New Zealand passerines with a special focus on coccidia :a thesis presented in partial fulfilment of the requirements for the degree of Master of Veterinary Science at Massey University, Palmerston North, New Zealand
    (Massey University, 2010) Schoener, Ellen Renate; Schoener, Ellen Renate
    There is not much known about the taxonomy, prevalence, epidemiology, and life cycles of gastrointestinal parasites of passerine birds in New Zealand and there is a possibility that many of these parasites might have been introduced by non-native passerines. Approximately half of all New Zealand native passerine species are on the endangered list. Translocations to safe areas are the major management technique used to safeguard them for the future. Under natural conditions, gastrointestinal parasites seldom pose a threat. However, factors such as quarantine for translocation, overcrowding, low genetic diversity, and/or habitat changes may cause an infection outbreak that can severely affect the host species. The effect these parasites might cause under these conditions may therefore endanger translocation and captive breeding programmes. The purpose of this study was to generate baseline data on the gastrointestinal parasites of New Zealand native and introduced passerine birds with an emphasis on the coccidian parasites. Faeces and tissues were examined from 361 birds from six native and four introduced species. Parasites were identified using flotation and microscopy, in the case of the coccidia also PCR analysis and DNA sequencing were used. Of the samples examined, 90 (24.93 %) were positive for coccidian parasites. Sequencing analysis revealed a close relationship between these parasites and other avian coccidia of the genus Eimeria. I found one coccidia species with a unique sequence in North Island robin and one in North Island saddlebacks, at least two different unique sequences in hihi and two in blackbird as well as at least three in tui. In addition, 18 (4.99%) birds were positive for trematodes, 30 (8.31%) for cestodes and three (0.83%) for Capillaria. Most of these parasites were reported during this study for the first time. The results of this study have therefore revealed a whole range of new species of parasite infecting passerines in New Zealand providing a glimpse into the biodiversity of passerine parasites in New Zealand. This knowledge will be useful when taking management decisions particularly for translocations of protected species by alerting managers of possible sources of disease outbreak.