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 55 for “"early life-history"”.
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SCAPHIRHYNCHUS STURGEON EARLY-LIFE HISTORY
… understanding of sturgeon autecology during all life stages, especially during early life when high mortality occurs. To begin to understand sturgeon early-life history I determined river of origin on a multi-basin scale (i.e., potential rivers of origin). I then determined habitat needs and …
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Early life-history ecology of Arctic benthic invertebrates
… explore the abiotic and biotic factors impacting early life-history bottlenecks in the Arctic Ocean and Woods Hole, MA. Many marine invertebrates have a biphasic life-history, with larvae that disperse in the water column then settle to the seafloor. Extreme population bottlenecks occur at larval …
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Thermal impacts on the early life history of Sauger (Sander canadensis)
Sauger (Sander canadensis), a large North American member of the family Percidae, often exhibit sporadic recruitment governed by a variety of biotic and abiotic factors. This episodic reproductive success is emblematic in Percids, as it has been documented across a wide geographic area for multiple …
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Early Life History of Yellow Perch in Eastern South Dakota Lakes
… recruitment, a better understanding of their early life history is required. I selected two natural lakes with differing yellow perch population types and monitored brood stock, spawning habits, and larval and juvenile life history patterns during 1995 and 1996. Pelican Lake was selected as a …
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Early life history of snapper (Chrysophrys auratus) in northern New Zealand
… in this thesis investigates some aspects of the early life history of C. auratus in four harbours (Kaipara, Manukau, Mahurangi and Huruhi) in northern New Zealand. Histological gonad analyses showed that recruitment to the Kaipara Harbour must originate from spawning activity outside the harbour. …
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Early Life History Stage Dynamics Across the Elevational Ranges of Andean Trees
… and environmental factors affect the early life history stages and transitions of tropical trees.
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Ecophysiological adaptations to salinity variation in early life-history stages of decapod crustaceans
Decapod crustaceans which successfully invade habitats with hypo-osmotic conditions must show strong hyper-osmoregulatory capacities, stable growth also at reduced salinities, strongly differentiated ion-transporting tissues, high activities of Na+-K+-ATPase, and an enhanced expression of mRNA …
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Early-Life History of the White Sucker (Catostomus Commersoni) in Lake Taneycomo, Missouri
White suckers (Catostomus commersoni) were monitored during the 1994 and 1995 spawning periods to determine location and timing of reproduction, dispersal of larvae, and growth of sub-adult fish. Daily aging by the use of otoliths from lab reared white sucker larvae was validated to 28 days. …
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Laboratory studies on the spawning and the early life history of Pacific halibut (Hippoglossus stenolepis)
There is a growing interest in halibut research in many countries because of its market and scientific value. The first successful spawning of Pacific halibut in captivity in the United States was conducted during February and March, 1988, and eight larvae were produced in that spawning season. …
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Early Life History and Stock Discrimination of Kokanee Salmon (Oncorhynchus nerka) in an Alpine Lake Environment
… bull trout. However, little is known about the early life history of this population and how it interacts with unique features in its rearing environment. With my research I described the early life history of kokanee salmon that spawn in the lake’s main tributary, Gold Creek, and proposed a …
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Reproduction and early life history of a landlocked population of alewife (Alosa pseudoharencus) in Claytor Lake, Virginia
Alewives in Claytor Lake matured at age I at 160 mm TL. Fecundity of gravid females increased with age and length, ranging from 17,307 eggs at age I to 37,147 eggs at age III. The majority of alewife spawning was concentrated in littoral areas of a large embayment. Spawning period was protracted …
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Post-settlement processes and early life history dynamics of zebra mussels (Dreissena polymorpha) in the Hudson River estuary
… little or nothing about processes occurring to early life history stages. One of the main barriers to our understanding is a lack of empirical data on young life stages including larval supply, the number of larvae settling and the number of settlers that survive the early benthic period (until …
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Ecology of the Early Life History of the Caribbean Spiny Lobster, <i>Panulirus argus:</i> Recruitment, Predation, and Habitat Requirements
<p>Recruitment variability of the early life history stages of marine benthic organisms can have profound consequences on population dynamics. I studied factors affecting recruitment success of postlarvae and early juveniles of the Caribbean spiny lobster. I examined patterns in postlarval supply, …
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Seen but not heard: Reconstructing the early life history of the Industrial child through carbon and nitrogen stable isotope analysis of dentine collagen
Objective This project reconstructs the early life history of the child in industrial London using incremental dentine analysis of both adults (survivors) and children (non-survivors) within a single 19th century London burial population to investigate the effects which changing social and economic …
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Early Life History of <i>Prognichtys occidentalis</i> and <i>Caranx crysos</i> Associated With <i>Sargassus</i> Habitat in the Northcentral Gulf of Mexico
<p>Pelagic Sargassum and associated fronts provide an important combination of enhanced biological production and structural habitat in oceanic environments. Fronts are regions of convergence between two water masses and often provide enhanced prey densities for juvenile fishes. The present study …
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Early life history dynamics of a stocked striped bass (Morone saxatilis) population and assessment of strategies for improving stocking success in Smith Mountain Lake, Virginia
The early life history dynamics of stocked, fingerling striped bass (Morone saxatilis) were evaluated in Smith Mountain Lake, Virginia, from 1994-96 and incorporated into an individual-based model to assess various stocking strategies in terms of their largest percent increases in first-year …
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