Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 51 for “"reef-fish"”.
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Spatial and temporal dynamics of an exploited reef-fish population
The successful management of the fishery for galjoen Dichistius capensis depends on an understanding of its spatial and temporal dynamics. This thesis investigates the movement of galjoen and its fishery parameters, and evaluates the role of marine protected areas (MPAs) and alternative assessment …
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Wave energy and the role of swimming in reef fish ecology
… mechanisms in highly mobile organisms such as reef fishes have remained largely unexplored. The present study compared levels of wave-induced water motion among reef habitats with the swimming mode and performance of resident reef fishes. Encompassing ten families (Acanthuridae, Chaetodontidae, …
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The structure and dynamics of spawning aggregations of coral reef fish
… and dynamics of spawning aggregations of coral reef fish The specific aims are to identify and characterise: (1) the species of coral reef fishes that formed spawning aggregations, (2) the locations where spawning aggregations were formed, (3) the periodicity with which these aggregations were …
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Habitat driven responses of reef fish: temporal change, niche partitioning and selection
… The change in turn threatens the associated fish communities relying on their maintenance for habitat provision. At present, a much better understanding of the interaction between changing habitats and the associated fish is necessary. To address the lack of understanding of the habitat – …
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Effects of fishing on a coral reef fish assemblage in Northeastern Brazil
Reef fisheries are important activities that support the livelihoods of millions of people. Reef fisheries exploit different habitats and typically target a diversity of species caught with a matching diversity of fishing gears. However, previous studies of reef fisheries have generally lacked …
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Distributional relationships among subtidal algae, sea urchins and reef fish in northeastern New Zealand
… among large brown macroalgae, sea urchins, and fishes were investigated in northeastern New Zealand during the period 1988 - 1993. The Cape Rodney to Okakari Point Marine Reserve was the site of many of these investigations. The patterns of abundance of large brown macroalgae and urchins down …
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Parental and environmental effects on the early life history of a tropical reef fish, Amphiprion melanopus
Tropical coral reef fish larvae are characterised by high mortality, which is predominantly driven by size- and growth- selective processes. While recent studies of environmental correlates have explained 7 - 36 % of the variation in larval growth rate in wild populations, the majority of the …
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Population biology, dynamics and their implications for management of red bass: a large, long-lived reef fish
… bohar (Forsskal 1775), is a large tropical reef fish that has a widespread circum-tropical distribution (Allen 1985). Preliminary research (Marriott 2002) done prior to this thesis identified that this species was potentially long-lived and slow-growing. Knowing this, the harvest of L. bohar …
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Reef fish demographics on Louisiana artificial reefs : the effects of reef size on biomass distribution and foraging dynamics
… role that habitat plays in the life history of reef-associated fishes is particularly significant given the dramatic increase in the number of artificial reefs deployed in coastal ecosystems over the past 50 years. In the Gulf of Mexico, the oil and gas industry has added a significant amount of …
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How do parents respond to changing ecological and social environments: insights from a coral reef fish with biparental care
… change. My dissertation used the clown anemonefish (Amphiprion percula) study system to explore plasticity in parenting strategies in response to variable ecological and social environments. In Part I, I investigated plasticity in response to ecological environment. First, I explored how …
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Do hurricanes and other severe weather events affect catch per unit effort of reef-fish in the Florida Keys?
… events frequently affect important marine fish stocks and fisheries along the United States Atlantic and Gulf of Mexico coasts. However, the effects of these events on fish and fisheries are not well understood. The availability of self-reported data from two fisheries in a region …
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A multi-scale analysis of population dynamics and sexual size dimorphism in a widely distributed coral reef fish family (Acanthuridae)
… and associated life history features of coral reef fish vary across a range of spatial scales. Many Indo-Pacific species are particular in that their geographical distribution extends over ocean basins, and there is increasing evidence that a number of coral reef fish display highly asymptotic …
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Baited remote underwater video survey of reef fish in the Stilbaai marine protected area, with an assessment of monitoring requirements
Long-term monitoring of changes in species abundance and community composition within marine protected areas (MPAs) is essential to assess whether conservation goals are being reached. The costs, logistics and sampling biases inherent to traditional monitoring methods limit sustainable monitoring …
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Geographic variation in size at age of the coral reef fish, Thalassoma lunare (family: Labridae) : a contribution to life history theory.
… predictions were yet to be tested in coral reef fish. Therefore, the objective of this project was to examine age-based parameters in discrete populations of Thalassoma lunare, a widespread and opportunistic wrasse, to evaluate whether reef fish fit predictions of traditional life history …
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Patterns in reef fish assemblages as determined by baited remote underwater video (BRUV) along the western side of False Bay: effects of site, depth and protection status
… zones require continuous monitoring of the fish community to evaluate the response of marine ecosystems to anthropogenic impacts and environmental change. Obtaining an understanding of the patterns of species composition, abundance, and distribution, allows monitoring efforts to be focused, …
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The demography of Red Sea reef fishes since the Last Glacial Maximum
Coral reefs are at increasing risk of climate-induced mass bleaching events and mass mortality, yet we do not know how coral reef fish species respond to habitat loss on temporal and spatial scales relevant to climate change. The Red Sea represents an ideal model system to address this given that …
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Changes in food web structure and energy flow in kelp forest ecosystems on the south-west coast of South Africa following the invasion of Jasus lalandii
… between the two different states and assess how fishing pressure may have driven the shift in ecosystem state. Using the baseline models, different fishing management strategies were tested to see whether the post lobster-invaded ecosystem could be shifted back or close to the pre-invasion state. …
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Assessing the effects of anticoagulant rodenticides on non-target fish species
… DPN in 2009. Following this attempt in 2009, a fish mortality event was reported on Ni'ihau and a dead whale calf also was found around the same time. Analysis of the affected fish were done and found no rodenticide in tissues. Despite these results, concerns of AR exposure to non-target species …
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Cryptic Herbivorous Invertebrates Restructure the Composition of Degraded Coral Reef Communities in the Florida Keys, Florida, USA
<p>Coral reefs have been on a trajectory of decline for nearly a century due to a variety of factors that have contributed to the shift in these communities away from dominance by reef-building corals, with commensurate changes on community composition and function. Florida’s reefs are a compelling …
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Population genetics and systematics of a species-rich clade of Neotropical reef fishes, the tubeblenny genus Acanthemblemaria
Neotropical coral reef fish communities are species-poor compared to those of the Indo-West Pacific. An exception to that pattern is the blenny clade Chaenopsidae, one of only three coral reef fish families endemic to the Neotropics. Within the chaenopsids, the genus Acanthemblemaria is the most …
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