Blar i Havforskningsinstituttet på emneord "otolitter"
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A preliminary study of microstructure in otoliths of seacaught mackerel (Scomber scombrus L.) larvae
(ICES CM Documents;1990/H:4, Working paper, 1990)Mackerel larvae have been sampled during two cruises south of lrland, in May and June 1989 and preserved in ethanol. The microstructure of the otoliths (sagittae) from the mackerel larvae have been examined. There is a ... -
Age readings of Sebastes marinus otoliths: bias and precision between readers and otolith preparation methods
(ICES CM documents, Working paper, 2001)This study presents a comparative age reading on Sebastes marinus from the Icelandic shelf within an otolith exchange program between institutes in Germany, Iceland and Norway. Out of a series of 212 otolith pairs, ... -
Bomb dating and age determination of large pelagic sharks
(Journal article; Peer reviewed, 2002)Despite their notoriety and role as apex predators, the longevity of large pelagic sharks such as the porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) is unknown. Vertebral growth bands provide an accurate indicator ... -
Cod fish otoliths: information storage structures. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
(Flødevigen rapportserie, Conference object, 1984)The otoliths of cod fish may have incorporated within their structural and chemical components a large amount of lifehistory information. This information may be revealed when appropriate analytical methods are utilized. ... -
Detecting and tracing farmed salmon with natural geo-element otolith ‘fingerprint’ tags: developing and validating tag delivery techniques
(Rapport fra Havforskningen;11-2015, Research report, 2015-04)Farmed fish escape and enter the environment with possible effects on wild populations. Attempts to reduce the incidence of escape could be assisted if individuals can be traced back to the point of escape, so that escape ... -
Distinguishing between spring and autumn spawned herring from daily increments, a preliminary report
(ICES CM Documents;1988/H:15, Working paper, 1988)Otoliths from Norwegian Spring Spawning herring larvae, collected on a cruise in May 1985 and North Sea Autumn Spawned herring larvae, collected on a cruise in Desember 1987, were examined for daily increments. A greater ... -
Do capelin larvae deposit daily increments in their otoliths?
(ICES CM documents, Working paper, 2004)Analysis of increment formation in larval fish otoliths has provided valuable information about growth, transport and mortality processes of larvae in wild stocks, but the technique has not been widely used on capelin ... -
Environmental influences on the recruitment process inferred from otolith stable isotopes in Merluccius merluccius off the Balearic Islands
(Journal article; Peer reviewed, 2008-08-13)Oxygen (δ18O) and carbon (δ13C) isotope ratios in sagittal otoliths were analysed in recruits and juveniles of European hake Merluccius merluccius L. caught in the northwest (Sóller, SO) and south (Cabrera, CA) of the ... -
Growth and mortality patterns evaluated from otolith microstructure in Atlantic cod Gadus morhua larvae reared on different feeding regimes in mesocosms
(Journal article; Peer reviewed, 2003-12-15)The objective of this work was to test the hypothesis that in a situation where predators are excluded growth and mortality rates of cod larvae should be independent. This was evaluated from distributions of otolith ... -
Growth patterns in otoliths as an indication of daily growth variations of larval herring (Clupea harengus) from an experimental ecosystem
(ICES CM Documents;1981/H:31, Working paper, 1981)Larval herring were released in a large outdoor basin four days after hatching and the mean growth in length and weight of the herring larvae and fry was monitored for 100 days. The food supply was estimated from weekly ... -
Growth rates and age distributions of capelin (Mallotus villosus) larvae in the Barents Sea investigated by otolith increment analysis
(ICES CM documents, Working paper, 2004)In order to investigate age distributions and growth rates, otoliths from capelin larvae collected from the Barents Sea during the summers 2001-2003 were analysed using otolith microstructure analysis. Stations were ... -
A guide to the extraction and interpretation of otoliths from larval and pelagic juvenile Arcto-Norwegian cod.
(Fisken og havet, Research report, 1996)The techniques for extraction of the lapillar otoliths, and interpretation of otolith microstructure in Arcto-Norwegian cod (Gadus morhita L.) is outlined and reviewed. Increment deposition in this species is daily, ... -
Manual for dagsonelesing ved bruk av datamaskin
(Flødevigen meldinger;4 - 1988, Working paper, 1988) -
Manual for OPS (Otoliths Population Statistics)
(Flødevigen meldinger;5 - 1990, Working paper, 1990) -
Otolittreferansesamling for lodde (Mallotus villosus) i Barentshavet
(Fisken og havet;5-2011, Research report, 2011-06)In 2007 a project was initiated at the Institute of Marine Research, Bergen, with the aim to further develop the methods for age determination of fish by their otoliths, as well as to assure the quality of routine age ... -
Primary growth increments in otoliths of cod larvae (Gadus morhua L.) of the Arcto-Norwegian cod stock
(ICES CM Documents;1981/G:54, Working paper, 1981)Primary growth increments are laid down in the otoliths of cod larvae living in a habitat where the light intensity is above the light threshold for visual feeding during 24 hours, and in which the larvae were observed to ... -
Primary growth rings in Blue Whiting otoliths
(ICES CM documents;1979/H:32, Working paper, 1979)To approach the problem of ageing blue whiting, acetat prints of the otoliths have been studied through a microscope. Primary growth rings have been counted, and provided that these are formed daily, the hatching time could ... -
Primary growth rings in otoliths of the Barents Sea capelin
(ICES CM Documents;1982/H:9, Working paper, 1982) -
Report of the Blue Whiting Otolith Reading Workshop [Tórshavn, Faroe Islands, 2- 6 November, 1992]
(ICES CM Documents;1993/H:6, Working paper, 1993) -
Report of the Horse Mackerel Otolith Workshop [Lowestoft, UK, 15- 19 January, 1999]
(ICES CM Documents;1999/G:16, Working paper, 1999)