Browsing by Supervisor "Hicks, Brendan J."
Now showing items 1-20 of 32
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Abundance, behaviour and habitat requirements of the banded kokopu Galaxias fasciatus Gray (Pisces: Galaxiidae)
(The University of Waikato, 1998)The native freshwater banded kokopu (Galaxias fasciatus Gray) is generally regarded as a nocturnal predator of small native forest streams. Current methods for determining absolute abundances of this species in these ... -
Assessment of injury to New Zealand native fish by boat electrofishing
(University of Waikato, 2013)This study investigated the survival, incidence and severity of injuries and physiological reactions to stress caused by boat electrofishing in comparison with standard netting techniques in three New Zealand native fish ... -
Comparative hypoxia responses and oxygen sensing in galaxiid fishes
(The University of Waikato, 2017)Aquatic ecosystems are inherently characterised by limited oxygen availability and fluctuations in dissolved oxygen concentration, and therefore, environmental hypoxia (i.e. low oxygen conditions) is common. However, in ... -
Comparison of riparian willows and riprap as habitat for fish and invertebrates in the Waikato River
(University of Waikato, 2011)Willows (Salix spp.) are an abundant alien tree and have been the mainstay of river bank protection throughout New Zealand. Riprap is another method of bank stabilisation consisting of rocks used to amour shorelines to ... -
Contribution of seagrass (Zostera muelleri) to estuarine food webs revealed by carbon and nitrogen stable isotope analysis
(The University of Waikato, 2006)Seagrass is a conspicuous marine angiosperm that forms extensive beds in coastal and intertidal estuarine areas. In many regions worldwide seagrass is in decline and there is a pressing need to understand the function and ... -
Determining and testing the optimal pure-tone frequency for use in acoustic conditioning of free-ranging common carp (Cyprinus carpio)
(University of Waikato, 2012)Pure-tone frequencies of 400, 700, and 1000 Hz were tested to determine which achieved the strongest response when used in conditioning experiments on captive common carp (Cyprinus carpio) for the purpose of determining ... -
Effects of native forest and pastoral land use on the population dynamics and trophic role of the New Zealand freshwater crayfish Paranephrops planifrons (Parastacidae)
(The University of Waikato, 2000)Deforestation and conversion to pasture of over 50% of land area has affected the water quality, physical habitat, and fish and benthic invertebrate communities of New Zealand streams, but the impact of land use change on ... -
Enhancing spatial resolution of remotely sensed data for mapping freshwater environments
(University of Waikato, 2011)Freshwater environments are important for ecosystem services and biodiversity. These environments are subject to many natural and anthropogenic changes, which influence their quality; therefore, regular monitoring is ... -
Evaluating the effects of invasive brown bullhead catfish (Ameiurus nebulosus) on kōura (freshwater crayfish, Paranephrops planifrons) in Lake Rotoiti
(The University of Waikato, 2019)Brown bullhead catfish (Ameiurus nebulosus) are opportunistic carnivores native to North America and were first detected in Te Weta Bay, Lake Rotoiti, in March 2016. A cordon was placed across the bay to try and contain ... -
Factors controlling common smelt abundance and rainbow trout growth in the Rotorua Lakes, New Zealand
(University of Waikato, 2012)Recreational fisheries are of considerable ecological, economic and cultural importance worldwide, and understanding the factors that influence them is an important goal of fishery managers. The two most important factors ... -
Fish biomass in Taranaki streams in relation to sources and availability of energy
(The University of Waikato, 2022)Light and temperature are the principal drivers of ecosystem function influencing nutrient cycling, energy flows, and food web dynamics. Solar irradiance controls stream thermodynamics, and in-stream temperature governs ... -
Food webs in the lower Waikato River and the role of hydrogeomorphic complexity
(University of Waikato, 2014)Large rivers are fundamental to human societies and consequently their ecosystems have come under increasing pressure from a range of developments and uses. Despite this, there is still a major knowledge gap understanding ... -
Integrated Model Development for the Assessment of Food Security in China Related to Climate Change and Adaptation
(University of Waikato, 2014)This thesis developed a practical methodological framework, which integrated the bio-physical and socio-economic processes within the food system across different scales. The framework provides a useful tool for the ... -
Landscape-level variation in stable isotopes of carbon and nitrogen across aquatic ecosystems in New Zealand
(The University of Waikato, 2023)The stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) are frequently used in food web studies as natural biological indicators for tracking ecological processes, interactions, and energy flows from the basal plant ... -
Life history of fluvial and lacustrine land-locked koaro (Galaxias brevipinnis) Günther (Pisces: galaxiidae) in the Tarawera lakes
(The University of Waikato, 2002)Biological diversity in New Zealand has been seriously degraded as a result of human induced disturbances which include the introduction of many exotic species. Freshwater ecosystems have not escaped damage, with the ... -
Long-term variations in fish assemblage, macrophyte community, and water quality in Lake Rotoroa (Hamilton Lake)
(University of Waikato, 2012)Lake Rotoroa (37º48’S, 175º16’E) is a small, shallow, polymictic lake located on the western side of Hamilton City. The lake covers an area of 0.54 km2 with a mean depth of 2.4 m, catchment and riparian margins have been ... -
Modelling temporal dynamics of discharge and nutrient loading from a mixed land use catchment, and interactions with a eutrophic, temperate lake under climate change
(The University of Waikato, 2017)Understanding anthropogenic–induced changes in catchment water discharge and nutrient loads is critical for eutrophication assessment and sustainable management of receiving environments. Anthropogenic activities have ... -
Native New Zealand fish: lethal and sublethal effects of pentachlorophenol on early and adult life stages
(The University of Waikato, 1998)The sensitivity of four New Zealand freshwater fish species to 99.5% pure pentachlorophenol was studied. For one part of the study, four early life stages of smelt (Retropinna retropinna), inanga (Galaxias maculatus), koaro ... -
The physical and biological function of wood in New Zealand's forested stream ecosystems
(University of Waikato, 2011)Since the arrival of humans approximately 1000 years before present (B. P.), New Zealand has lost approximately 80% of its forest cover and along with it, the contribution of wood to our aquatic ecosystems. The aim of this ... -
Remote sensing, numerical modelling and ground truthing for analysis of lake water quality and temperature
(University of Waikato, 2014)Freshwater accounts for just 2.5% of the earth’s water resources, and its quality and availability are becoming an issue of global concern in the 21st century. Growing human population, over-exploitation of water sources ...
