Browsing by Supervisor "Hicks, Brendan J."
Now showing items 1-20 of 32
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Landscape-level variation in stable isotopes of carbon and nitrogen across aquatic ecosystems in New Zealand
(The University of Waikato, 2022)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 ... -
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 ... -
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 ... -
Spatial structuring and patterns of connectivity among Antarctic toothfish (Dissostichus mawsoni) stocks in the Southern Ocean: a view through otolith chemistry
(The University of Waikato, 2022)An important prerequisite of sustainable fisheries management is knowledge about the spatial structure of fish populations. Such information provides a basis for understanding population dynamics and connectivity as well ... -
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 ... -
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 ... -
The biogeography and trophic roles of coastal marine sponges (Porifera) from the west coast of the North Island, New Zealand: Influences of catchments.
(The University of Waikato, 2021)Anthropogenic activities are degrading coastal marine ecosystems globally. While the ecological and biodiversity implications of some of these impacts are well understood, for others there is a need for a greater understanding ... -
The use of seagrass (Zostera muelleri) habitat by Canada geese (Branta canadensis) in Waikato estuaries.
(The University of Waikato, 2021)Seagrass beds are highly biodiverse habitats delivering key ecosystem functions and services to mankind. Zostera muelleri is New Zealand’s single seagrass species, and occurs intertidally within several estuaries and ... -
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 ... -
Rendering koi carp and creating economic value by making pet food
(The University of Waikato, 2020)Koi carp is an invasive species fish in New Zealand that severely destroys the aquatic environment in the waterways in the Waikato region. The aim of the project was to look for a method that could make use of captured koi ... -
The biology and general ecology of the brown bullhead catfish (Ameiurus nebulosus) in Lake Taupo
(The University of Waikato, 1996)The population structure, relative fish abundance, age, growth rate, and diet of the brown bullhead catfish (Ameiurus nebulosus) in Lake Taupo were examined. The study attempted to evaluate the possible impacts of catfish ... -
The status of fish in Hamilton Lake (Lake Rotoroa)
(The University of Waikato, 1995)The size, population structure, relative fish abundance, diet and heavy metal concentrations of fish in Hamilton Lake (Lake Rotoroa) were examined. A combination of gill nets, fyke nets and minnow traps were used at each ... -
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 ... -
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 ... -
The aquatic ecology of Lake Rotokare
(The University of Waikato, 2018)The biology of three endemic and one exotic species of fish (banded kokopu, Galaxias fasciatus; shortfin eel, Anguilla australis; longfin eel, Anguilla dieffenbachii; and the European perch, Perca fluviatilis) was investigated ... -
Seasonal and spatial patterns in nitrogen cycling and food web interactions in Lake Taupō New Zealand
(The University of Waikato, 2018)Lakes with high water quality and low productivity, commonly referred to as ‘oligotrophic’, are often viewed as relatively pristine and highly aesthetic ecosystems, but may still require management of nutrient inputs and ... -
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 ... -
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 ... -
The Fate and Effects of Contaminants in Estuarine Environments
(University of Waikato, 2017)Estuaries are sensitive environments regarding their response to anthropogenic events. The accumulation of toxic trace elements, such as Cd and Pb, has detrimental consequences on benthic community composition and function ... -
The ecology of constructed ponds on the lower Waikato River floodplain: implications for waterfowl management
(University of Waikato, 2014)Numerous ponds have been constructed in recent years on the lower Waikato River floodplain yet many waterfowl populations are in decline. Overseas research highlights the importance of constructed ponds for waterfowl ...
