Search Results - "Kjesbu, Olav Sigurd"
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Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
Published in Scientific reports (03-03-2021)“…Mortality rates in the early life-history stages of fishes are generally high yet identifying the causes remain unclear. Faltering recruitment rates of…”
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Development of a new ‘ultrametric’ method for assessing spawning progression in female teleost serial spawners
Published in Scientific reports (15-06-2020)“…The collection and presentation of accurate reproductive data from wild fish has historically been somewhat problematic, especially for serially spawning…”
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Synergies between climate and management for Atlantic cod fisheries at high latitudes
Published in Proceedings of the National Academy of Sciences - PNAS (04-03-2014)“…The widespread depletion of commercially exploited marine living resources is often seen as a general failure of management and results in criticism of…”
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Bioenergetics of egg production in Northeast Atlantic mackerel changes the perception of fecundity type and annual trends in spawning stock biomass
Published in Progress in oceanography (01-11-2021)“…•Protein and lipid energy year cycle presented for the first time.•Energy and feeding dynamics consistent with indeterminate fecundity type.•Main reproductive…”
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Linking the dynamic organization of the ovary with spawning dynamics in pelagic fishes
Published in Marine biology (01-04-2022)“…The link between the dynamic organization of the ovary and spawning dynamics was investigated in pelagic fishes with indeterminate fecundity. Αn array of…”
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Frequent skipped spawning in the world's largest cod population
Published in Proceedings of the National Academy of Sciences - PNAS (05-06-2012)“…Life-history theory suggests that animals may skip reproductive events after initial maturation to maximize lifetime fitness. In iteroparous teleosts,…”
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Experimental parameterisation of principal physics in buoyancy variations of marine teleost eggs
Published in PloS one (14-08-2014)“…It is generally accepted that the high buoyancy of pelagic marine eggs is due to substantial influx of water across the cell membrane just before ovulation…”
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Emergence of an oocytic circumnuclear ring in response to increasing day length in Atlantic herring (Clupea harengus)
Published in Marine biology (01-02-2012)“…Understanding physiological and environmental variables that initiate sexual maturity would provide fundamental information on life history dynamics. The aim…”
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Strategies for partition between body growth and reproductive investment in migratory and stationary populations of spring-spawning Atlantic herring (Clupea harengus L.)
Published in Fisheries research (01-02-2013)“…In this study the reproductive investment of six populations of Atlantic herring (Clupea harengus) in Norwegian waters was contrasted in relation to trade-offs…”
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Effects of population size/age structure, condition and temporal dynamics of spawning on reproductive output in Atlantic cod ( Gadus morhua)
Published in Ecological modelling (05-02-2006)“…In this study, we model daily reproductive output over an entire spawning season for a range of simulated age/size-structured populations of Atlantic cod (…”
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Growth, gonadal development and spawning time of Atlantic cod ( Gadus morhua) reared under different photoperiods
Published in Aquaculture (26-11-2001)“…Individually tagged Atlantic cod ( Gadus morhua L .) (mean body weight 459±6 g) were reared in 20-m 3 tanks supplied with running sea water. During the first…”
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Oocyte development in captive Atlantic horse mackerel Trachurus trachurus
Published in ICES journal of marine science (01-05-2009)“…Ndjaula, H. O. N., Hansen, T., Krüger-Johnsen, M., and Kjesbu, O. S. 2009. Oocyte development in captive Atlantic horse mackerel Trachurus trachurus. – ICES…”
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Seasonal trends in adenylate nucleotide content in eggs of recruit and repeat spawning Atlantic cod (Gadus morhua L.) and implications for egg quality and buoyancy
Published in Journal of sea research (01-10-2012)“…Seasonal and ontogenetic variation in egg buoyancy (egg specific gravity; ρ) (n=63) and nucleotide content (n=46) were examined for wild-caught Atlantic…”
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Management of transboundary and straddling fish stocks in the Northeast Atlantic in view of climate‐induced shifts in spatial distribution
Published in Fish and fisheries (Oxford, England) (01-09-2020)“…The introduction of 200 n.m. exclusive economic zones (EEZs) in the late 1970s required increased collaboration among neighbouring coastal states to manage…”
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From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology
Published in Journal of fish biology (01-09-2020)“…Ambient temperature modulates reproductive processes, especially in poikilotherms such as teleosts. Consequently, global warming is expected to impact the…”
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The legacy of Johan Hjort: challenges and critical periods—past, present, and future
Published in ICES journal of marine science (18-06-2021)“…Abstract The 150th anniversary of Johan Hjort’s birth was celebrated by a symposium held in Bergen on 12–14 June 2019 to take a broad perspective on the…”
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Spawning fish maintains trophic synchrony across time and space beyond thermal drivers
Published in Ecology (Durham) (01-06-2024)“…Increasing ocean temperature will speed up physiological rates of ectotherms. In fish, this is suggested to cause earlier spawning due to faster oocyte growth…”
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New insights in oocyte dynamics shed light on the complexities associated with fish reproductive strategies
Published in Scientific reports (05-12-2019)“…Information on temporal variations in stock reproductive potential (SRP) is essential in fisheries management. Despite this relevance, fundamental…”
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Ocean warming shapes embryonic developmental prospects of the next generation in Atlantic cod
Published in ICES journal of marine science (28-05-2024)“…Abstract Although early embryonic protein production relies exclusively on maternal molecules such as messenger RNAs (mRNAs) incorporated into ovarian…”
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Life‐history parameters of adult females of Merluccius capensis (Gadidae) off the south coast of South Africa
Published in Journal of fish biology (01-09-2024)“…This study explores the life‐history parameters of female Merluccius capensis off South Africa (N = 1819) during 2014–2016, including gonadosomatic index…”
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