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Akvakultur og fiskeopdræt: praksis og teknik

Her finder du spændende bøger om Akvakultur og fiskeopdræt: praksis og teknik. Nedenfor er et flot udvalg af over 50 bøger om emnet.
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  • af Stephen A. Bortone & Stephen T. Szedlmayer
    473,95 kr.

  • af Saurav Lamichhane
    337,95 kr.

    Bachelor Thesis from the year 2020 in the subject Biology - Miscellaneous, , language: English, abstract: Carp polyculture is the most common, popular, and successful aquaculture system in Nepal. Including mono-sex Nile tilapia in carp polyculture could enhance fish productivity. This present LEE work was conducted at the Fish hatchery complex of Fisheries Program, Agriculture and Forestry University, Rampur, Chitwan, in a cemented tank of area 25 m² for 26 days to study the carp and mono-sex Nile tilapia in a polyculture system.The pond was fertilized using urea and DAP at the rate of 4,7 g/m²/week and 3.5 g/m²/week respectively. Fishes except Grass carp were fed twice daily with the pellet made from mustard oil cake and rice bran mixed at a 1:1 ratio at the rate of 5% BW. Grass carp were fed with duckweed at a rate of 50% BW twice a day from 7:30 am to 8 am and 1:30 pm to 2 pm. Water quality parameters i.e., water temperature, transparency, water depth, dissolved oxygen, and pH and were monitored daily while total alkalinity was monitored weekly. Sampling of fish was done fortnightly to check fish growth and adjust feed quantity. All the water quality parameters were within the optimal range of fish production except for DO which was very high during the afternoon. The extrapolated GFY and NFY were 14.5 t/ha/yr and 9.6 t/ha/yr, respectively. The overall survival of fish was 87% and AFCR was 1.4. The total variable cost and the production cost was NRs. 220/kg. Fishes were transferred to the Aquaculture farm, assuming the selling rate NRs. 300/kg. This makes the total gross return was of NRs. 875, making a total net profit of NRs. 327. The B: C ratio was 1.59. From this LEE work, it was concluded that carp and mono-sex Nile tilapia polyculture is a reliable and profitable venture to carry out.

  • af Mark (University of the West of England Everard
    131,95 - 305,95 kr.

  • af Glenn Merron
    359,95 kr.

  • af Gary C.B. (Australian Museum) Poore & Shane T. (Australian Museum Sydney) Ahyong
    2.098,95 kr.

    Marine Decapod Crustacea explains the anatomical features necessary for differentiating taxa and includes diagnoses and identification keys to all 189 families and 2121 genera of marine Decapoda. Many decapods have vivid colours, which are showcased in a selection of spectacular photographs of many representative species.

  •  
    390,95 kr.

    Drawing on the expertise of marine researchers from both the natural and social sciences, this book examines how we, as both scientists and societies, can return to a sustainable co-existence with the ocean and use the tools of transdisciplinarity to bring together the diverse forms of knowledge needed to achieve this important task.

  •  
    1.336,95 kr.

    Drawing on the expertise of marine researchers from both the natural and social sciences, this book examines how we, as both scientists and societies, can return to a sustainable co-existence with the ocean and use the tools of transdisciplinarity to bring together the diverse forms of knowledge needed to achieve this important task.

  •  
    1.479,95 kr.

  • af B. Ahilan & A. Kamalii
    961,95 kr.

  • af Kathleen Kevany
    2.098,95 kr.

  • af Jasmin Graham
    427,95 kr.

  • af Laura Barsanti & Paolo Gualtieri
    1.064,95 kr.

    A single-source reference on the biology of algae, the third edition of Algae: Anatomy, Biochemistry, and Biotechnology examines the most important taxa and structures for freshwater, marine, and terrestrial forms of algae.

  •  
    473,95 kr.

    This volume explores and explains the vast uses and benefits of algae as food, feed, and fuel. It covers the most advanced applications of algae in the food and feed industries and for environmental sustainability.

  • af Radhakrishnan E. K., Jyothis Mathew & Midhun Sebastian Jose
    1.203,95 kr.

  • af Sullip Kumar Majhi
    710,95 kr.

    India is known as hotspot for fish diversity and harbor approximately 11% of the global fish species in its diversified aquatic resources. Despitethis, only few species are propagated through aquaculture. Nevertheless, there are several other commercially important fish species those could bepotentially considered as a candidate for aquaculture. However, because seed of such fish species are not available readily or they can not beinduced breed in captivity, attention was never given to introduce them in aquaculture. The assisted reproductive technologies, widely used inmammals, could play an important role in such cases mainly to generate seed and make available them for aquaculture.In teleost fishes, one of the most popular assisted reproductive technology used to produce seed is "Induced breeding by hormonal intervention". The success of this technology in Indian major carp has revolutionized the aquaculture sector. With the refinement of this technology, now seed of carp could be generated at wish. However, all the fish species do not spawn with the intervention of this technology. There are several endocrine and paracrine factors responsible for that, stress of confinement for example.There are few other assisted reproductive technologies, those emerged recently, could be applied to generate seed from fish species those carry commercial value but, could not be propagated in captivity due to body size or do not spawn due to stress of confinement. In this book, various such assisted reproductive technologies are discussed like surrogacy, in vitro gametogenesis and stem cell based technology. It is expected that, the book will be helpful to the aquaculture industry, especially the seed producing units. Also, researchers and academicians will be greatly benefited from this book as the contents and protocols are explained in simple understandable language.

  • af Eduardo Jacob-Lopes, Maria Isabel Queiroz & Mariana Manzoni Maroneze
    2.020,95 kr.

    Handbook of Food and Feed From Microalgae: Production, Application, Regulation, and Sustainability is a comprehensive resource on all aspects of using microalgae in food and feed. This book covers applied processes, including the utilization of compounds found in microalgae, the development of food products with microalgae biomass in their composition, the use of microalgae in animal nutrition, and associated challenges and recent advances in this field.Written by global leading experts in microalgae, this book begins with the fundamentals of food and feed, including microalgal biodiversity, biogeography, and nutritional purposes. The book continues to describe compounds found within microalgae such as proteins, pigments, and antioxidants. It explains the process incorporation of microalgae into meat, dairy, beverage, and wheat products as well as real-world food applications in finfish aquaculture, mollusk, poultry, and pet feeding. The book concludes by discussing challenges and issues in the field, encompassing bioavailability, bio-accessibility, and how to address safety, regulatory, market, economics, and sustainability concerns. This book is a valuable resource for aquaculturists, food scientists, and advanced undergraduate and graduate students interested in microalgae as a sustainable food and feed ingredient.

  •  
    917,95 kr.

    The book includes major aspects of Zooplankton ecology, including key processes and methodologies. For each functional group, processes and environmental drivers are explored allowing inferences to be drawn on the distribution patterns, impact of environmental alterations.

  • af Eric Hallerman, Bernardo B Baldisserotto & Maria Angeles Esteban
    569,95 kr.

    This addresses current advances and challenges in fisheries and aquaculture science. Exposure of larval fish to elevated temperatures during embryological development may induce craniofacial and morphological alterations, which are suggested possible impacts of global warming. Molecular markers shed new light on the ontogenetic migration of stream fishes. Fast growth rates, early age at maturity, moderate fecundity, and diverse diet explain the potential for introduced fishes to dominate fish communities in their native and introduced range. Taking videos of marine benthic habitats supports low-impact, real-time monitoring of species occurrence. Among heavily fished species, almost half had outdated demographic assessments that would benefit from the integration of data from fisheries sources and improved collaboration among fishery stakeholders and managers. The continued growth of aquaculture will depend upon developing feeds that improve the growth, oxidative status, and immune response of fed cultured organisms. New aquaculture feedstuffs might be derived from plants or microbes, and new additives would include ghrelins and dietary symbiotics. The effects of these constituents on survival, growth, gut histomorphology, immune response were assessed for cultured freshwater and marine species. The results provide suggestions for advances in aquafeeds for the species studied and for cultured fishes more generally. The scientific advances realized with the use of new tools provide the basis for addressing global challenges to fisheries, aquaculture and for ongoing scientific research.

  • af Louis Figuier
    171,95 kr.

  • af R.Leroy Creswell
    700,95 - 911,95 kr.

    The Aquaculture Desk Reference serves as a concise compila tion of tables, graphs, conversions, formulas and design specifica tions useful to the aquaculture industry.

  • af La, Hans Ackefors, USA) Konikoff, mfl.
    649,95 - 917,95 kr.

    This work offers insights into the history and development of aquaculture. Subjects include: natural production versus aquaculture; the aquatic environment; energy requirements and relationships in aquaculture systems; major cultured species and their distribution; and global production.

  • - Ethophysiology
    af J Brusle
    1.349,95 kr.

  • af PATRICK T.K. WOO
    999,95 kr.

    An important new title on climate change, and its effects on selected non-infectious disorders of fish. Contains contributions by internationally recognized experts who have contributed significantly to our knowledge in this area.

  • af Ramasamy Santhanam
    649,95 kr.

    Supplying sustenance for millions of the poorest people in the world, freshwater flora and fauna also contribute to overall economic well-being by means of export commodity trade, tourism, and recreation. As sources of high-quality nutrients, freshwater flora and fauna of edible value represent a viable option for alleviating the problems related to malnutrition in developing and underdeveloped countries.Although the nutritional benefits of freshwater flora and fauna are well known, there has long been a need for a book that supplies an assessment of their nutritional qualities. Well-illustrated with approximately 325 photographs, this book fills that need. Nutritional Freshwater Life details the characteristics of more than 300 species of nutritionally important freshwater animals and plants.The book covers algae and plants, crustaceans (prawns, crayfish, and crabs), mollusks (bivalves and gastropods), fish, and frogs. For each species of freshwater life identified, the book provides a photograph and details its characteristics such as scientific name, common names, habitats, global distribution, nutritional facts, and biological features.

  • - A Practical Guide to Economics and Marketing
    af Carole Engle
    859,95 kr.

    This exciting new book provides practical guidance and advice for individuals who are seeking to manage and develop a successful aquaculture business.

  • af H Wang
    2.785,95 kr.

    A comprehensive resource that covers all the aspects of sex control in aquaculture written by internationallyΓÇôacclaimed scientists Comprehensive in scope, Sex Control in Aquaculture first explains the concepts and rationale for sex control in aquaculture, which serves different purposes. The most important are: to produce monosex stocks to rear only the fastestΓÇôgrowing sex in some species, to prevent precocious or uncontrolled reproduction in other species and to aid in broodstock management. The application of sex ratio manipulation for population control and invasive species management is also included.  Next, this book provides detailed and updated information on the underlying genetic, epigenetic, endocrine and environmental mechanisms responsible for the establishment of the sexes, and explains chromosome set manipulation techniques, hybridization and the latest gene knockout approaches. Furthermore, the book offers detailed protocols and key summarizing information on how sex control is practiced worldwide in 35 major aquaculture species or groups, including fish and crustaceans, and puts the focus on its application in the aquaculture industry.  With contributions from an international panel of leading scientists, Sex Control in Aquaculture will appeal to a large audience:  aquaculture/fisheries professionals and students, scientists or biologists working with basic aspects of fish/shrimp biology, growth and reproductive endocrinology, genetics, molecular biology, evolutionary biology, and R&D managers and administrators. This text explores sex control technologies and monosex production of commerciallyΓÇôfarmed fish and crustacean species that are highly in demand for aquaculture, to improve feed utilization efficiency, reduce energy consumption for reproduction and eliminate a series of problems caused by mixed sex rearing. Thus, this book: Contains contributions from an international panel of leading scientists and professionals in the field Provides comprehensive coverage of both established and new technologies to control sex ratios that are becoming more necessary to increase productivity in aquaculture Includes detailed coverage of the most effective sex control techniques used in the worldΓÇ▓s most important commerciallyΓÇôfarmed species Sex Control in Aquaculture is the comprehensive resource for understanding the biological rationale, scientific principles and realΓÇôworld practices in this exciting and expanding field. 

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