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  • 1
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Cephalopoda -- Cultures and culture media. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (493 pages)
    Edition: 1st ed.
    ISBN: 9789401786485
    DDC: 639.485
    Language: English
    Note: Preface -- Contents -- Contributors -- Part I -- Introduction -- Chapter-1 -- Cephalopod Biology -- 1.1 Introduction -- 1.2 Reproduction and Growth -- 1.2.1 Fecundity -- 1.2.2 Growth -- 1.3 Life Cycle -- 1.3.1 Embryos -- 1.3.2 Hatchlings -- 1.3.3 Juveniles and Subadults -- 1.3.4 Adult Life -- 1.3.4.1 Sexual Dimorphism -- 1.3.4.2 Egg Care -- 1.3.4.3 Post-Spawning Period and Senescence -- 1.4 Conclusion -- References -- Chapter-2 -- Behaviour -- 2.1 Introduction -- 2.2 Antipredator Behaviours -- 2.3 Foods and Feeding Behaviours -- 2.3.1 Cuttlefish (Order Sepiida) and Squid (Order Teuthida) -- 2.3.2 Octopuses -- 2.4 Nonsexual Social Interactions -- 2.5 Reproduction and Lifespan -- 2.5.1 Life History -- 2.5.2 Movement -- 2.5.3 Semelparity -- 2.5.4 Mating and Spawning -- 2.5.5 Egg-Care Behaviours -- 2.5.6 Hatching and Paralarvae -- 2.6 Conclusions -- References -- Chapter-3 -- Fisheries Production and Market Demand -- 3.1 Introduction -- 3.2 Why are Cephalopods not Fish but Good Fishery Resources? -- 3.3 What is the Status of Cephalopod Capture Fisheries in Different Parts of the World? -- 3.4 Small-Scale Fisheries -- 3.5 Stock Assessment and Fishery Management -- 3.6 Certification Schemes -- 3.7 Markets and Trade: To What Extent Could Aquaculture Contribute to Supply the Markets? -- 3.8 The Future -- 3.9 Conclusions -- References -- Chapter-4 -- Historical Review of Cephalopods Culture -- 4.1 Cephalopods as Model Species for Science-the Need for Aquaculture -- 4.2 1960s: The First Dedicated Studies -- 4.3 1970s: Cephalopod Biology Studies and Maintenance Gain Momentum -- 4.4 1980s: The First Studies on Mass Culture -- 4.5 1990-2000: The Optimization of Culture Protocols -- 4.6 Conclusions -- References -- Chapter-5 -- Nutrition as a Key Factor for Cephalopod Aquaculture -- 5.1  Introduction -- 5.2   Proteins -- 5.3   Lipids -- 5.4   Carotenoids. , 5.5   Carbohydrates -- 5.6   Minerals -- 5.7   Vitamins -- 5.8   Populational Metabolism Differences -- 5.9   Conclusions -- References -- Chapter-6 -- Welfare and Diseases Under Culture Conditions -- 6.1 Welfare in Cephalopods Under Captive Conditions -- 6.1.1 Legislation -- 6.1.2 "Pathology" in Cephalopods -- 6.1.2.1 "Cephalopods Immune System" -- 6.1.2.2 "Pathological Agents" -- 6.1.2.3 Healing, Antibiotics and Surgery -- 6.2 Welfare Under Research and Commercial Culture Conditions -- 6.3 Conclusions -- References -- Chapter-7 -- Aquaculture to Restocking -- 7.1 Introduction -- 7.2 Restocking in Japan -- 7.2.1 Background -- 7.2.2 Hatchery Seed Production and Seed Release -- 7.2.2.1 Octopus vulgaris -- 7.2.2.2 Sepioteuthis lessoniana -- 7.2.2.3 Heterololigo bleekeri -- 7.2.2.4 Sepia latimanus -- 7.2.2.5 Other Cephalopod Species -- 7.3 Restocking in Thailand -- 7.3.1 Background -- 7.3.2 Methods -- 7.3.2.1 Hatchery Seed Production -- 7.3.2.2 In situ Seed Production -- 7.4 Conclusions -- References -- Chapter-8 -- Applications, Uses and By-products from Cephalopods -- 8.1 Introduction -- 8.2 Uses and Applications -- 8.2.1 Marine Oil -- 8.2.2 Chitin and Chitosan -- 8.2.3 Collagen and Gelatine -- 8.2.4 Calcium and Hydroxyapatite -- 8.2.5 Functional Peptides -- 8.2.6 Peptones -- 8.2.7 Enzyme -- 8.2.8 Fish Sauce -- 8.2.9 Organic Fertilizer -- 8.2.10 Ink -- 8.3 Conclusion and Trend -- References -- Chapter-9 -- Farming Costs and Benefits, Marketing Details, Investment Risks: The Case of Octopus vulgaris in Spain -- 9.1 Introduction -- 9.2 Exploitation Process -- 9.2.1 Production Systems -- 9.2.2 Subadults Supply -- 9.2.3 Ongrowing Process -- 9.2.4 Feeding -- 9.3 Costs Analysis -- 9.3.1 Initial Investment -- 9.3.2 Evolution of Octopus Prices -- 9.3.3 Costs of the Ongrowing Process -- 9.4 Conclusions -- References -- Part II. , Main Cultured Cephalopods -- Chapter-10 -- Nautilus -- 10.1 Background -- 10.2 Reproductive Biology -- 10.3 Embryology -- 10.4 Husbandry -- 10.4.1 Source and Capture -- 10.4.2 Water -- 10.4.3 Housing -- 10.4.4 Feeding -- 10.5 Captive Reproduction -- 10.6 Disease and Anesthesia -- 10.7 Conclusions -- References -- Chapter-11 -- Sepia officinalis -- 11.1 Commercial Value and Capture Methods -- 11.2 State of the Art -- 11.3 Broodstock Rearing Conditions and Acclimatization to Captivity -- 11.3.1 Seawater Systems and Conditions -- 11.3.2 Sex Ratio and Stocking Densities -- 11.3.3 Food Supply -- 11.4 Spawning Process -- 11.4.1 Female Conditions -- 11.4.2 Egg Capture and Handling -- 11.5 Hatchlings Culture -- 11.5.1 Hatchlings Collection and Transfer -- 11.5.2 Culture Conditions -- 11.5.2.1 Seawater Systems -- 11.5.2.2 Physicochemical Conditions -- 11.5.2.3 Light -- 11.5.2.4 Diet -- 11.5.3 Growth and Survival -- 11.6 Ongrowing of Juveniles and Adults -- 11.6.1 Tank and Earthen Pond Conditions -- 11.6.2 Density -- 11.6.3 Food -- 11.6.4 Cleaning Techniques -- 11.6.5 Growth, Survival and Sampling -- 11.7 Trends in Research and Industrial Level -- 11.8 Conclusions -- References -- Chapter-12 -- Sepia pharaonis -- 12.1 Importance of this Species in the Market -- 12.2 State of the Art -- 12.3 Broodstock Maintenance -- 12.4 Incubation of Egg Masses -- 12.4.1 Egg Characteristics and Hatching -- 12.4.2 System Requirements and Management -- 12.5 Nursing of Young -- 12.5.1 Hatchling Characteristics -- 12.5.2 System Requirements and Management -- 12.5.3 Feeding -- 12.5.4 Growth -- 12.6 Ongrowing -- 12.6.1 System Requirements and Management -- 12.6.2 Feeding -- 12.6.3 Growth -- 12.7 Trends in Research and Industrial Level -- 12.8 Conclusions -- References -- Chapter-13 -- Sepiella inermis -- 13.1 Importance of this Species in the Market -- 13.2 State of the Art. , 13.3 Broodstock Maintenance -- 13.4 Incubation of Egg Masses -- 13.4.1 Egg Characteristics and Hatching -- 13.4.2 System Requirements and Management -- 13.5 Nursing of Young -- 13.5.1 Hatchling Characteristics -- 13.5.2 System Requirements and Management -- 13.5.3 Feeding -- 13.5.4 Growth -- 13.6 Ongrowing -- 13.6.1 System Requirements and Management -- 13.6.2 Growth -- 13.7 Trends in Research and Industrial Level -- 13.8 Conclusions -- References -- Chapter-14 -- Sepiella japonica -- 14.1 Importance of Sepiella japonica in the Market -- 14.2 Broodstock Acclimatization to Captivity -- 14.3 Spawning Process -- 14.3.1 Mating -- 14.3.2 Spawning -- 14.3.3 Nursing of Eggs -- 14.4 Hatchling and Juvenile Nursing -- 14.4.1 Feed -- 14.4.2 Water Quality, Illumination, Aeration and Nursing Density -- 14.5 Ongrowing -- 14.5.1 Indoor Ongrowing -- 14.5.2 Cage Culture -- 14.5.2.1 Selection of the Farm Location, Cage Size and Layout -- 14.5.2.2 Juvenile Size and Density -- 14.5.2.3 Feeding -- 14.5.2.4 Daily Management -- 14.6 Harvest -- 14.7 Trends in Research and Industrial Level -- 14.8 Conclusions -- References -- Chapter-15 -- Euprymna hyllebergi and Euprymna tasmanica -- 15.1 Importance of the Species -- 15.2 State of the Art -- 15.3 Broodstocks Maintenance -- 15.4 Nursing of Eggs -- 15.4.1 Egg Characteristics -- 15.4.2 System Requirements and Management -- 15.5 Nursing of Young -- 15.5.1 Hatchling Characteristics -- 15.5.2 System Requirements and Management -- 15.5.3 Feeding -- 15.5.4 Euprymna hyllebergi Growth -- 15.6 Ongrowing -- 15.6.1 System Requirements and Management -- 15.6.2 Euprymna hyllebergi Growth -- 15.6.3 Euprymna tasmanica Growth -- 15.7 Trends in Research and Industry -- 15.8 Conclusions -- References -- Chapter-16 -- Loligo vulgaris and Doryteuthis opalescens -- 16.1 Importance of these Species in the Market -- 16.2 State of the Art. , 16.3 Broodstock Acclimatization to Captivity -- 16.3.1 Food Supply -- 16.3.2 Sex Ratio -- 16.3.3 Physical and Chemical Parameters -- 16.4 Spawning Process -- 16.5 Embryonic Development -- 16.5.1 Egg Collection and Transportation -- 16.5.2 Incubation Conditions and Influence of Environmental Factors during Embryogenesis -- 16.6 Paralarval Rearing -- 16.6.1 Tank Design and Circulation Patterns -- 16.6.2 Water Quality -- 16.6.2.1 Particulate Organic Matter -- 16.6.2.2 Nitrogenous Wastes -- 16.6.2.3 Dissolved Gases -- 16.6.2.4 pH -- 16.6.2.5 Disinfection and Pathogens -- 16.6.2.6 Temperature -- 16.6.3 Food and Feeding -- 16.6.4 Survival -- 16.6.5 Growth -- 16.6.6 Social Behaviour -- 16.7 Ongrowing -- 16.7.1 Tank and Sea Cage Conditions -- 16.7.2 Density -- 16.7.3 Food -- 16.7.4 Cleaning Techniques -- 16.7.5 Growth, Survival, Spawning and Sampling -- 16.8 Trends in Research and Industrial Level -- 16.9 Conclusions -- References -- Chapter-17 -- Sepioteuthis lessoniana -- 17.1 Importance of this Species in the Market -- 17.2 State of the Art -- 17.3 Culture Methodology -- 17.3.1 Open Seawater System in Tropical Countries -- 17.3.1.1 Background -- 17.3.1.2 Broodstock Maintenance -- 17.3.1.3 Nursing of Egg Capsules -- 17.3.1.4 Nursing of Young -- 17.3.1.5 Ongrowing -- 17.3.2 Open and Closed Seawater System in Temperate Countries -- 17.3.2.1 Broodstock Maintenance -- 17.3.2.2 Nursing of Egg Capsules -- 17.3.2.3 Nursing of Young -- 17.3.2.4 Ongrowing -- 17.4 Trends in Research and Industrial Level -- 17.5 Conclusions -- References -- Chapter-18 -- Amphioctopus aegina -- 18.1 Importance of this Species in the Market -- 18.2 State of the Art -- 18.3 Broodstock Maintenance and Spawning -- 18.4 Nursing of Eggs and Brooding Females -- 18.5 Nursing of the Young -- 18.5.1 Feed and Tank Management -- 18.5.2 Growth -- 18.6 Ongrowing. , 18.6.1 Feed, System Requirements and Management.
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  • 2
    Keywords: Hochschulschrift
    Type of Medium: Book
    Pages: xiv, 194 Seiten , Illustrationen, Graphen, Karten
    Language: English , Spanish
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  • 3
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The reproductive strategy of the cirrate octopods Opisthoteuthis agassizii and O. vossi (collected off Namibia from 1988 to 1990) was analyzed. Ovarian oocyte size frequency analysis for both species revealed continuous egg production over the entire adult life span. Mature eggs were stored in the single oviducal gland and distal oviduct, but oviducal gland fullness was not related to body size (p〉0.2). All O. agassizii male specimens from 95 to 5400 g total weight were sexually mature, as were all females from 190 to 1650 g, indicating that considerable growth takes place after the onset of sexual maturity. “Continuous spawning” is defined as a single, extended and continuous period of egg maturation and spawning. This model of reproductive strategy is previously unreported in cephalopods. All O. vossi male specimens from 750 to 3050 g total weight, and females from 800 to 1300 g, were sexually mature. Mature males and females of both species were collected in all seasons of the year. The adaptation of cirrate octopods to non-scasonal deep-sea environments is considered. The sexual maturity characteristics of males were analyzed, and examination of the spermatophore revealed opercular structures previously unreported in cephalopods. For females, the micropyle of the eggs are described and the mineral analysis of the egg shell disclosed that sulphur was the major element present.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 377 (1995), S. 107-107 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR á- The common octopuses of the world's oceans are bottom-living cephalo-pod molluscs. In more than half of the species known, hatchlings are planktonic1 and swim by jet propulsion2"4. The swimming behaviour and duration of this planktonic phase before settlement have been a subject of ...
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2019-07-17
    Description: Cephalopods have been utilised in neurosci- ence research for more than 100 years particularly because of their phenotypic plasticity, complex and centralised nervous system, tractability for studies of learning and cellular mechanisms of memory (e.g. long-term potentia- tion) and anatomical features facilitating physiological studies (e.g. squid giant axon and synapse). On 1 January 2013, research using any of the about 700 extant species of ‘‘live cephalopods’’ became regulated within the European Union by Directive 2010/63/EU on the ‘‘Protection of Animals used for Scientific Purposes’’, giving cephalopods the same EU legal protection as previously afforded only to vertebrates. The Directive has a number of implications, particularly for neuroscience research. These include: (1) projects will need justification, authorisation from local competent authorities, and be subject to review including a harm-benefit assessment and adherence to the 3Rs princi- ples (Replacement, Refinement and Reduction). (2) To support project evaluation and compliance with the new EU law, guidelines specific to cephalopods will need to be developed, covering capture, transport, handling, housing, care, maintenance, health monitoring, humane anaesthesia, analgesia and euthanasia. (3) Objective criteria need to be developed to identify signs of pain, suffering, distress and lasting harm particularly in the context of their induction by an experimental procedure. Despite diversity of views existing on some of these topics, this paper reviews the above topics and describes the approaches being taken by the cephalopod research community (represented by the authorship) to produce ‘‘guidelines’’ and the potential contribution of neuroscience research to cephalopod welfare.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 6
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    Springer
    In:  Reviews in Fish Biology and Fisheries, 28 (1). pp. 191-199.
    Publication Date: 2021-02-08
    Description: Sperm storage is common in internally fertilizing animals, but is also present in several external fertilizers, such as many cephalopods. Cephalopod males attach sperm packets (spermatangia) to female conspecifics during mating. Females of eight externally fertilizing families comprising 25% of cephalopod biodiversity have sperm-storage organs (seminal receptacles) in their buccal area, which are not in direct physical contact with the deposited spermatangia. The mechanism of sperm transmission between the implantation site and the storage organ has remained a major mystery in cephalopod reproductive biology. Here, jumbo squid females covering almost the entire life cycle, from immature to a laboratory spawned female, were used to describe the internal structure of the seminal receptacles and the process of sperm storage. Seminal fluid was present between the spermatangia and seminal receptacles, but absent in regions devoid of seminal receptacles. The sperm cellular component was formed by spermatozoa and round cells. Although spermatozoa were tracked over the buccal membrane of the females to the inner chambers of the seminal receptacles, round cells were not found inside the seminal receptacles, suggesting that spermatozoa are not sucked up by the muscular action of the seminal receptacles. This finding supports the hypothesis that spermatozoa are able to actively migrate over the female skin. Although further experimental support is needed to fully confirm this hypothesis, our findings shed light on the elusive process of sperm storage in many cephalopods, a process that is fundamental for understanding sexual selection in the sea.
    Type: Article , PeerReviewed
    Format: text
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  • 7
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    Rosenstiel School of Marine and Atmospheric Science
    In:  Bulletin of Marine Science, 49 (1-2). pp. 288-299.
    Publication Date: 2020-07-14
    Description: The diet of Opisthoteuthis agassizi and O. vossi in the southeast Atlantic was studied from 171 and 121 individuals respectively. Small epibenthic and suprabenthic crustaceans and polychaetes are the most frequent prey items in both species, suggesting that they feed on suprabenthic and epibenthic material. Diel analysis of feeding by O. agassizi at 490 m and O. vossi at 836 m depth demonstrated a pattern of continuous feeding. Relationships of total body length and beak measurements to total weight were also studied. The ultrastructure of sucker and cirri are described for both species and their relationship with prey detection mechanisms is discussed.
    Type: Article , PeerReviewed
    Format: text
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  • 8
    Publication Date: 2019-02-15
    Description: Analysis of growth by year of hatching was estimated from the statolith growth increments of the oceanic squid Todarodes angolensis in three consecutive years. Samples were taken between November 1987 and February 1990 in the northern Benguela upwelling system. Growth increments suggested that hatching took place throughout the year and that the life cycle was ≈ 1 yr. From the onset of sexual maturity in the final third of the life cycle, growth rates were subject to considerable individual variation. Growth rate was significant highest in the 1987 year class, presumably because of exceptionally cool environmental conditions in the Benguela region. The response of T. angolensis to interannual environmental variability in the northern Benguela system is discussed. The results from this study suggest that it will be important to consider variability in growth rate in relation to environmental conditions, in future studies of squid age and growth.
    Type: Article , PeerReviewed
    Format: text
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  • 9
    Publication Date: 2020-07-17
    Description: The cephalopod fauna collected during six surveys carried out in the bathyal basin of the north-western Mediterranean is discussed. Samples were taken at depths mainly between 1000 and 2000 m. Ten species were identified. Bathypolypus sponsalis and Neorossia caroli were the commonest species. Small individuals of both these species occurred at greater depths than did larger individuals, suggesting up-slope ontogenetic migration. The depth ranges recorded for all species collected are discussed and compared to the results of previous studies found in the literature.
    Type: Article , PeerReviewed
    Format: text
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  • 10
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    Elsevier
    In:  Journal of Experimental Marine Biology and Ecology, 208 . pp. 169-184.
    Publication Date: 2020-11-16
    Description: The planctonic life in Mediterranean Octopus vulgaris lasts about 2 months but we know virtually nothing of this phase of its life history, which represents around 10-15% of the estimated life span. Swimming behaviour from hatching to settlement was studied by video-recording techniques, using five groups aged 1,15,30,42 and 60 days, by when they have become benthic. During the planctonic stage, the backwards, squid.like jet swimming was the predominant type of displacement. Strong morphometric changes, basically in arm growth, influence their jetting capacities and probably the settlement process. Feeding behaviour was analyzed using two species of decapod zoeae as prey, Liocarcinus depurator (L.) and Pagurus prideaux Leach; it is that of a visual predator. The forward displacement typically forms part of this predatory behaviour. During the planctonic phase, the presence of prey increase the turning rate and reduces the swimming speed of Octopus vulgaris individuals. Both responses may improve the exploitation of patchy food environments.
    Type: Article , PeerReviewed
    Format: text
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