Author: Claire Stouthamer Ingel
Publisher:
ISBN:
Category :
Languages : en
Pages : 125
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Book Description
The upper third of the Hudson River has experienced thousands of hectares of shallow water habitat loss from filling shallow, low-velocity areas along the margins of the river with dredge material from channelization. Such low-velocity habitats often support high larval fish densities and serve as nursery habitat for many early life fishes. Moreover, the anadromous alewife populations along the Atlantic coast are in decline, including the Hudson River population. Early life is a defining stage in the life history of many fish species, with the relative abundance of populations being defined in the first few weeks of life. Therefore, the rehabilitation of previously filled nursery habitat for alewife and other Hudson River alosines could aid in the recovery of these species. This study considered larval fish presence in the context of different physiochemical parameters of shallow water microhabitats. Particular emphasis was placed on the distribution and ontogeny of larval alewife to inform habitat rehabilitation for this species. In order to sample in shallow areas as well as maintain the contrasts of intra-site variability, larvae were collected by random point abundance sampling using a throw trap within three shallow water sites in the Tivoli Bays Estuarine Research Reserve. Chapter 1 examined larval alewife distribution in relation to microhabitat structure using a logistic mixed effects model. Results indicated that alewives were more frequently present in lower velocity and deeper water while avoiding aquatic vegetation. Furthermore, larvae were caught more frequently during ebb tide and at low river water levels. These findings suggest that considerable local variation occurs within nursery habitat and that this variability affects habitat suitability. Chapter 2 examined the shift in habitat use and feeding of alewife over the larval period. Ontogenetic changes begin in the embryo and continue after hatching so that additional physiological and behavioral capabilities increase with age. A linear model was developed to explore the relationship between fish size and a variety of habitat and biological community metrics, including available habitat, degree-days, larval density, and feeding incidence. Furthermore, larval diets were examined to identify feeding shifts over larval ontogeny. Distinct shifts in habitat association and diet were found in feeding larvae. Larger fish were found at locations with deeper water and higher water velocity. Alewives fed on microzooplankton when first feeding and shifted to progressively larger prey organisms as they grow. The appendix characterized alewife habitat partitioning with the rest of the shallow water fish community using canonical correspondence analysis. Several differences in habitat use were found between and among larvae and adult fishes of the Tivoli Bays community. The most important environmental variables influencing the fish assemblage were depth, dissolved oxygen, distance from shore, substrate, temperature, and vegetation density (Trapa natans and Vallisneria americana). All groups of larvae and adults displayed unique environmental signatures, including the larval and mature tessellated darters (Percidae). The observed shifts in microhabitat association and prey choice for larval alewife and habitat partitioning of the fish community have implications for rehabilitating suitable nursery habitats. Both active orientations to structural habitat components as well as tidal transport mechanisms are suspected to influence intra-site distribution. Restoration plans targeting larval alewife should take into account this intra-habitat variation. Furthermore, rehabilitation should include micro-scale heterogeneity to accommodate the range of ontogenetic habitat associations of larval alewives as well as the early life history preferences of other target species.
Author: Kerry S. Reeves
Publisher:
ISBN:
Category : Buffalofishes
Languages : en
Pages :
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Book Description
I developed a series of research objectives organized in 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) than main channel. Local-environmental factors accounted for the greatest proportion of variance in larval fish CPUE within sandbar ATTZ, followed by hydrologic and finally geomorphic factors at macro- and meso-habitat scales. At the microhabitat scale, the larval fish assemblage and carpsucker spp./buffalo spp. selected areas [lesser than or equal to] 10 cm deep with current velocities [lesser than or equal to] 5 cm/s. Silver/bighead carp (Hypophthalmichthys molitrix/nobilus) exhibited no selection based on water depth or current velocity. Chub spp. selected depths between 20-50 cm and areas 2-3 m from the waters edge. The larval fish assemblage and several taxa exhibited a significant nocturnal increase in CPUE within the primary channel and sandbar ATTZ at the macrohabitat scale in contrast to previous research indicating turbid rivers lacked a diel cycle in larval fish drift.
Author: Larry Arvidson
Publisher: CreateSpace
ISBN: 9781492260394
Category :
Languages : en
Pages : 80
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Book Description
Containing 52 color photographs of fish larvae collected from the Hudson River near Newburgh, NY, the volume describes more than 20 species at various stages of development soon after hatching and includes a key with simplified line drawings to help an investigator identify a specimen in hand.
Author: Larry D. La Bolle
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 182
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Book Description
Shallow-water habitats (0.5 m depth) of the upper littoral zone of John Day Pool of the Columbia River were heavily used by young fishes in comparison with lower littoral and limnetic waters. Through the season, 96.9% of the 64,700 larvae and juveniles collected (corrected for effort) were from upper littoral habitats. The sequential appearance of species and their change in life stage was the dominant ecological process identified in the ordination of sites and species. Spatially distinct species associations were identified in the cluster analysis, but they were temporally restricted because the composition of the community of young fishes changed continually. Three general patterns of habitat use by larval and juvenile fishes emerged: 1) a strongly littoral assemblage of native species of cyprinidae and catostomidae that was dominant in the tailrace and transition zones of the reservoir; 2) as association of introduced fishes with more lentic habitats (primarily centrarchidae), most abundant in the forebay and backwaters, and 3) larvae of two species, more limnetic in dispersal than others, rearing throughout the reservoir. General patterns of habitat use by larvae were consistently reflected in correlations of their abundance with physical variables. Larvae of three littoral native species, northern squawfish (Ptychocheilus oregonensis), largescale sucker (Catostomus macrocheilus), and peamouth (Mylocheilus caurinus), dominated the catch numerically ( 75%), and were in great abundance during the day in the margin microhabitats (
Author: Robert A. Clevenstine
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 74
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Book Description
Author: Jeffrey S. Levinton
Publisher: Cambridge University Press
ISBN: 9780521844789
Category : History
Languages : en
Pages : 514
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Book Description
The Hudson River Estuary, first published in 2006, is a scientific biography with relevance to similar natural systems.
Author: Dave Bosanko
Publisher: Fish Of
ISBN: 9781591930785
Category : Nature
Languages : en
Pages : 192
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Book Description
Contains illustrations and descriptions of more than seventy-five species of fish found in New York, each with information about its habitat, food, range, size, and reproduction.
Author: Creative Publishing international
Publisher: Quarto Publishing Group USA
ISBN: 1616739061
Category : Sports & Recreation
Languages : en
Pages : 289
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Book Description
A manual for recreational fishing, with guidance on gear, rigging and information on the most common fish found in North American lakes and streams. The Complete Guide to Freshwater Fishing offers the nearly forty million freshwater anglers in the US with a comprehensive fishing resource. From the highly respected The Freshwater Angler series, this title covers all the major freshwater species in North America. It includes tips and techniques for catching gamefish throughout the country under every conceivable on-the-water situation. In developing this book, the writers, editors and researchers traveled from Alaska to Mexico to fish with veteran guides and nationally known tournament anglers. The tips and techniques they uncovered are fully explained and illustrated in the book. This giant book features: Over 500 spectacular fishing photographs that have never before been published. Extensive step-by-step visuals for learning every important fishing skill, including advanced fishing techniques for many species. The best how-to instruction ever found in any fishing book. Guide-tested tips from some of North America’s top experts.
Author: Earl L. Bozeman
Publisher:
ISBN:
Category : Alewife
Languages : en
Pages : 28
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Book Description
Author: Joachim Carolsfeld
Publisher: World Bank Publications
ISBN: 1552501140
Category : Nature
Languages : en
Pages : 384
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Book Description
Fish species that migrate within the great rivers of South America support important local fisheries but are little known outside their native range. This book represents the first collection of the work of local scientific experts on these remarkable fish. The authors cover the Upper Parani, Paraguay-Parani, Uruguay and Suo Francisco basins in Brazil, as well as the Brazilian and Colombian Amazon. They discuss not only the principal migratory species and their fascinating relationship with the water cycle in the rivers and wetlands, but also the fisheries they support, and their often precarious conservation status."
