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.
Results
Showing 1 to 20 of 24 for “"nursery habitat"”.
-
Describing and Characterizing Potential Lemon Shark (Negaprion brevirostris) Nursery Habitat in Mississippi Coastal Waters
… to use Louisiana waters as their northernmost nursery habitat within the GoM, but recent juvenile captures in Mississippi (MS) waters prompted further exploration of the species. Data from long-term gillnet monitoring in conjunction with a focused gillnet study predominantly around Cat Island, …
-
Linkages between Marsh Fragmentation, Prey Availability, and Blue Crab (<i>Callinectes sapidus</i>) Abundance and Mortality
<p>Coastal marshes are important nursery habitats for many commercially important invertebrate species, yet these marshes are being lost worldwide at an unprecedented rate due to subsidence, erosion, climate change, and human activity. As marsh is lost, it creates the opportunity for submerged …
-
Factors influencing the nursery dynamics of juvenile bull sharks in two estuaries along the Texas coast
Nursery habitats provide refuge for juvenile organisms to grow and develop, and are utilized by several shark species, including bull sharks (Carcharhinus leucas). Bull sharks utilize estuaries adjoining the Gulf of Mexico as nursery habitat, and are the most abundant shark species found along the …
-
Physiological and behavioral responses, and their variability, in squid, Doryteuthis pealeii, embryos and paralarvae reared under chronic ocean acidification
… development of species that use the nearshore as nursery habitat. The inshore longfin squid, Doryteuthis pealeii, plays an important role in the northwest Atlantic food web, and annually lays its eggs in the nearshore benthos during summer. This thesis sought to characterize morphological, …
-
Investigation of the nearshore, episodic poleward current in the southern Benguela : a numerical modelling approach
… Benguela). The St Helena Bay region is a key nursery habitat for these fisheries because of its retention, upwelling and stratified water column characteristics. However, these characteristics also result in other outcomes such as hypoxia and harmful algal blooms (HAB's) which impact on the …
-
Use of main channel and shallow-water habitat by larval fishes in the lower Missouri River
… a spatial hierarchy to characterize larval fish nursery habitat within the lower Missouri River. Native carpsucker spp./buffalo spp. (Carpiodes spp./Ictiobus spp.) and chub spp. (Macrhybopsis spp.) catch-per-unit-effort (CPUE) was higher within sandbar aquatic terrestrial transition zone (ATTZ) …
-
Assessing the Nursery-Role Function of Pelagic Sargassum for Juvenile Fishes in the Northern Gulf of Mexico
… and the Gulf of Mexico (GOM). These floating habitats provide shelter and feeding opportunities for a diverse community of invertebrates and fishes. <em>Sargassum</em> is a presumed nursery habitat for juvenile stages of commercially- and recreationally-targeted fishery species. In this study, …
-
EVALUATING HABITAT USE BY NEKTON IN WIDGEON GRASS (RUPPIA MARITIMA), SHOAL GRASS (HALODULE WRIGHTII), AND UNVEGETATED BOTTOM HABITATS IN THE GRAND BAY NATIONAL ESTUARINE RESEARCH RESERVE
… offer shelter from predation, and act as a nursery habitat for juveniles. The species composition of seagrass beds can impact their use as habitat by animals. Two common species of seagrass in the Gulf of Mexico are <em>Ruppia maritima</em> (widgeon grass) and <em>Halodule wrightii</em> …
-
The Ecology of Parafluvial Ponds on a Salmon River
Parafluvial ponds are discrete lentic habitats embedded in the alluvia of gravel bed rivers that are formed by flooding and persist in relation to floodplain geohydrology. On the expansive flood plains of the Kwethluk River, I observed thousands of juvenile salmon apparently trapped by surface …
-
The Ecology of Parafluvial Ponds on a Salmon River
Parafluvial ponds are discrete lentic habitats embedded in the alluvia of gravel bed rivers that are formed by flooding and persist in relation to floodplain geohydrology. On the expansive flood plains of the Kwethluk River, I observed thousands of juvenile salmon apparently trapped by surface …
-
Physiological and behavioral responses, and their variability, in squid, Doryteuthis pealeii, embryos and paralarvae reared under chronic ocean acidification
… development of species that use the nearshore as nursery habitat. The inshore longfin squid, Doryteuthis pealeii, plays an important role in the northwest Atlantic food web, and annually lays its eggs in the nearshore benthos during summer. This thesis sought to characterize morphological, …
-
The Influence of the Clean Water Act and Tributaries on the Fish Community of the Big Sioux River, South Dakota
… fish use of five tributaries as spawning and nursery areas. Fish species richness was higher in 1994 than in 1967. The greatest fish community changes between years, as indicated by low community similarity indices, were below Brookings and Sioux Falls, and in the lower river. Distributions of …
-
Evaluating Methods for Optimizing Classification Success From Otolith Tracers for Spotted Seatrout (<i>Cynoscion nebulosus</i>) in the Chesapeake Bay
… Adult recruits are often sourced from multiple nursery areas, with good quality locations contributing disproportionately more fish to the adult stock. Because population persistence is strongly influenced by nursery habitat, methods that correctly identify the source of recruits are necessary …
-
Seasonal fish community and reproductive biology of fishes in two tributaries of the lower Missouri River, USA
Tributaries provide important habitats for spawning, rearing and feeding of fish in connected river systems. Regulation of rivers may alter the fish communities and environmental variables triggering fish use. Habitat destruction from dam construction is one of the leading causes for the decline of …
-
Ecology of the Early Life History of the Caribbean Spiny Lobster, <i>Panulirus argus:</i> Recruitment, Predation, and Habitat Requirements
… predator assemblages near reefs. In benthic habitats, predation was highest in coral crevices than in nearshore seagrass or macroalgae. To compare the role of a possible alternative nursery habitat to that of the south Florida system, I studied the population dynamics of juvenile spiny …
-
Seasonal Investigation of Native Fishes and Their Habitats in Missouri River and Yellowstone River Backwaters
… have assumed that backwaters are a critical habitat component for certain life stages of native fishes; however, documented relationships are limited. During this study, I monitored fishes, invertebrates, and habitats to help determine the importance of backwaters to native fishes of various …
-
Factors affecting the growth and recruitment of cyprinid populations of the River Wensum, Eastern England, with specific reference to roach Rutilus rutilus (L.).
… conducted in 2007 and 2008 revealed that nursery habitat was limited for the larval and juvenile life stages of the roach population, revealed by only 6 % of all points sampled containing 4 at least one roach. The probability of roach capture in a sample point only exceeded 0.80 when …
-
Effects of habitat characteristics on cryptic fish assemblages
Habitat structure is known to influence the abundance of fishes on temperate reefs. Biotic interactions play a major role in determining the distribution and abundance of species. The significance of these forces in affecting the abundance of fishes may hinge on the presence of organisms that …
-
Prey Selection by Young Lemon Sharks (Negaprion brevirostris) at Chandeleur Island Nursery Habitats with a Comparison to Three Other Co-Occurring Shark Species
The Chandeleur Islands (Louisiana) contain nursery habitats for lemon sharks that provide abundant prey and protection from predation. Other local shark species (Atlantic sharpnose, bull, and blacktip sharks) co-occur with lemon sharks in the same region, including the nearby Biloxi Marshes. To …
-
The ecology of two estuarine-dependent tonguefishes, the blackcheek tonguefish (Symphurus plagiusa) and the offshore tonguefish (S. civitatium), in coastal Louisiana
… that utilize inshore estuarine habitat as nurseries during their early life histories. Current management plans designed to stabilize marsh elevations, such as freshwater diversions, may also influence the distribution and abundance of estuarine-dependent nekton. Given the …
Page 1 of 2