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  • 1
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 2
    Publication Date: 1984-01-01
    Print ISSN: 0016-6707
    Electronic ISSN: 1573-6857
    Topics: Biology
    Published by Springer
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  • 3
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    Pergamon Press
    In:  Acta Zoologica, 77 (1). pp. 1-23.
    Publication Date: 2020-04-23
    Description: The rigid, polycrystalline otolith of teleosts is a side-branch of the general evolution of endolymphatic otoconia that extends from the sharks and rays to the higher vertebrates including man. The transition from the otoconial mass found in the endolymphatic sac of sharks and rays to the rigid polycrystalline otolith of teleosts probably occurred by progressive fusion of otoconia from a loose aggregate to a semi-rigid mass. Traces of the primitive fused otoconia type of otolith still occur in the otherwise polycrystalline otoliths of some teleosts, and a few species of fish retain otoliths that are probably similar to the primitive fused otoconia type of otolith. The morphology of the fusion of otoconia varies according to the polymorph of calcium carbonate that is involved, as well as the particular crystal habit of the polymorph. Analyses of the size distributions of the polymorph-specific morphologies and crystal structure of otoconia suggest that three physical chemical processes, Ostwald ripening, Keith-Padden spherulitic growth and carbonate cementation are significant in the chemistry of fusion of otoconia in the evolution of the aragonite teleost otolith. Predictions of otoconia growth rate from the theory of Ostwald ripening can be compared with predictions from the Keith-Padden theory of spherulitic growth.
    Type: Article , PeerReviewed
    Format: text
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  • 4
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    Unknown
    California Malacozoological Society
    In:  Veliger, 37 (1). pp. 93-109.
    Publication Date: 2020-04-30
    Description: The statocyst and statolith of a mature female giant squid Architeuthis kirki Dell, 1970, caught in New Zealand waters are described. The organization of the chambers and internal projections of the statocyst can be interpreted as an analogue of a lamprey-like labyrinth with two semicircular canals. Size, sex, date of capture, and site of capture are reported for 24 A. kirki specimens caught in New Zealand waters from 1983 to 1988. A statolith from a specimen captured 3 May 1987 was sectioned and examined for microincrements, and the age assigned by assuming daily microincrementation. When size and date of capture are used to estimate annual growth rates, they yield rates similar to or slightly faster than those inferred from the statolith microincrements. Four different growth curves have been fitted to the length-at-age data: lowess (locally weighted least squares), exponential, logarithmic (power curve), and von Bertalanffy. Estimated von Bertalanffy curve parameters are k = 0.0036d-1, and L- infin = 2168 mm dorsal mantle length.
    Type: Article , PeerReviewed
    Format: text
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 5 (1989), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The distributions of length frequencies subdivided by age of orange roughy (Hoplostethus atlanticus: Trachichthyidae) had the modal characteristics of K-selected populations. Oceanographic data showed that the depth strata occupied by orange roughy have boundary characteristics which could lead to the development of non-equilibrium dissipative thermodynamic structures and which would account for the K-selection configuration of orange roughy stocks.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 4 (1988), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Opaque and hyaline zones in orange roughy (Hoplostethus atlanticus: Trachichthydidae) otoliths (sagittae) were shown to correspond to both surface sculpturing of the otolith, and to light refractive opaque and hyaline zones within the otolith which are independant of the otolith surface sculpture. Three different patterns of opaque zones resulted from this effect, patterns which depend on whether the otolith is observed by transmitted light, incident light, or in section.〈section xml:id="abs1-2"〉〈title type="main"〉ZusammenfassungDer Effekt der Oberflächenstrukturen auf die Interpretation der opaken und hyalinen Zonen des OtolithenEs wurden Oberflächenstrukturen aus Steroscanaufnahmen auf den Otolithen von Hopolstethus atlanticus mit den im Durchlicht, im Auflicht und in Schnitten erkennbaren opaken und hyalinen Zonen verglichen. Dabei ließen sich 2 Otolithentypen feststellen: In der einen Gruppe der Otolithen waren die Oberflächenstrukturen nur gering ausgebildet, mit deutlichen opaken Zonen. In der anderen Gruppe gab es opake Zonen, die unterschiedlich stark mit Oberflächenstrukturen korrespondierten. Die Konsequenzen für Altersbestimmungen z. B. bei Sebastes alums unter Benutzung der Muster aus opaken Zonen werden diskutiert.〈section xml:id="abs1-3"〉〈title type="main"〉RésuméEffect des structures de la surface sur l'interprétation des zones opaques et hyalines de l'otolitheLes structures de la surface des otolithes de Hopolstethus atlanticus ont été comparées avec les zones opaques et hyalines reconnaissables en transparence, par lumière directe ou en coupe. Deux types d'otolithes ont été constatés: dans un groupe d'otolithes les structures de la surface n'étaient que peu apparentes avec des zones opaques bien définies. Dans l'autre groupe les zones opaques correspondaient, à des degrés différents, aux structures de la surface. Les conséquences pour la détermination de l'âge, comme de Sebastes alutus par exemple, sont discutées sous considération des formes des zones opaques.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A stable extraction technique was developed to quantify the lipofuscin content of fish brains. Samples of brains of the same age but different size rass carp showed that a large part of the variation in lipofuscin content was related to the weight of the fish.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 61 (2002), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A new Sr measurement standard is given for biominerals based on implanting an exactly known number of Sr atoms into an otolith section using ion-beam implantation and pre- and post-implantation ion beam (PIXE) scanning.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Variation in the proportions of serum esterase genetic polymorhisms drawn from samples of skipjack tuna (Katsuwonus elamis) has been used to identify geneticaty isolated stocks of K. pelamis in the South Pacific, based on the assumptions that variation in serum esterase gene proportion was essentially stochastic; such aruments are shown to be unacceptable. There is evidence that serum esterases may be involved in the deknsive resonses of vertebrates to parasites, and that genetic variation at a number of loci may be related to growth rate. It can be shown in a large proportion of samples that serum esterase gene proportion in K. pelamis was correlated to measures of growth rate. This implies that the Pacific-wide variation in esterase proportions in skipjack tuna may be due to local selection gradients involving growth rate.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The sagittal otolith of Macruronus novaezelandiae (Merlucciidae; Teleostei) showed cycles of strontium, calcium, nitrogen, carbon and oxygen in proton microprobe traces along both the sulcal to anti-sulcal growth axis, and the dorso-ventral rowth axis of the otolith. The cycles of strontium in the dorso-ventral growth axis had peak-to-peai distances similar to those of annual peaks expected from daily microincrement estimates of age.
    Type of Medium: Electronic Resource
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