Blar i Symposium proceedings på forfatter "Tjelmeland, Sigurd"
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The capelin assessment model: a documentation
Tjelmeland, Sigurd (PINRO-IMR Symposium, Conference object, 1985)The mathematical model used for management of the Barents Sea is documented. The model is used for predicting the evolution of the stock to evaluate the consequence of various catch quotas. -
The dependence of management strategies for Barents Sea cod and capelin on the recruitment models
Tjelmeland, Sigurd (PINRO-IMR Symposium, Conference object, 1995)The least studied subject in the assessment and management of Barents Sea cod and capelin is the management strategy. Using a cod-capelin-herring model, the uncertainty in the management strategy of cod and capelin arising ... -
Ecosystem approach to estimation of long-term yield of cod in the Barents Sea
Filin, Anatoly; Tjelmeland, Sigurd (IMR/PINRO Joint Report Series, Conference object, 2005) -
Ecosystem approach to estimation of long-term yield of cod in the Barents Sea [presentation]
Filin, Anatoly; Tjelmeland, Sigurd (IMR/PINRO Joint Report Series;2/2005, Conference object, 2005) -
Ecosystem dynamics and fisheries management in the Barents sea
Filin, Anatoly; Tjelmeland, Sigurd; Stiansen, Jan Erik (IMR/PINRO Joint Report Series;5/2007, Conference object, 2007) -
Ecosystem dynamics and fisheries management in the Barents sea [presentation]
Filin, Anatoly; Tjelmeland, Sigurd; Stiansen, Jan Erik (IMR/PINRO Joint Report Series;5/2007, Conference object, 2007) -
The effect of ambient temperature on the spawning migration of capelin
Tjelmeland, Sigurd (PINRO-IMR Symposium, Conference object, 1987)The model presently in use for management of the Barents Sea capelin stock may be considerably improved by utilization of biological information from the spawning stock. The distributions of length and age for capelin ... -
Evaluation of long-term optimal exploitation of cod and capelin in the Barents Sea using the bifrost model
Tjelmeland, Sigurd (IMR/PINRO Joint Report Series, Conference object, 2005) -
Harvesting control rules and future development of the precautionary approach: Northeast arctic cod as an example
Tjelmeland, Sigurd; Tretyak, Viktor (IMR/PINRO Joint Report Series, Conference object, 2002) -
Interrelations between fish populations in the Barents sea : proceedings of the fifth PINRO-IMR Symposium, Murmansk, 12-16 August 1991
Bogstad, Bjarte; Tjelmeland, Sigurd (PINRO-IMR Symposium;5, Research report, 1992) -
Long-term optimal exploitation of cod and capelin in the Barents Sea using the Bifrost model [presentation]
Tjelmeland, Sigurd (IMR/PINRO Joint Report Series;2/2005, Conference object, 2005) -
Maturity studies of Barents Sea capelin: Variations in length at maturity for female capelin
Forberg, Knut; Tjelmeland, Sigurd (PINRO-IMR Symposium, Conference object, 1985)The sexual maturation of female capelin in the Barents Sea is studied using a new method based on microscope investigation of eggs. A "length at maturity" (L) is defined, and a method for synthesizing the data is ... -
A method for estimation of predation mortalities on capelin using a cod-capelin model for the Barents Sea
Bogstad, Bjarte; Tjelmeland, Sigurd (PINRO-IMR Symposium, Conference object, 1992)The Barents Sea capelin stock coliapsed during the period 1983-1986. One of the main factors causing the colIapse was a rapid increase in consumption of capelin by cod, caused by the strong 1983 cod year class. Based ... -
A stochastic model for the Barents Sea capelin stock with predation from an exogenous cod stock
Tjelmeland, Sigurd (PINRO-IMR Symposium, Conference object, 1992)Based on the model CAPELIN used with management of the Barents Sea capelin stock until 1986, a model that is structured on age and sex is constructed. The predation on the mature part of the stock is connected to the ... -
Why did the three capelin stock collapses in the Barents Sea during the three last decades affect the ecosystem differently? [presentation]
Gjøsæter, Harald; Bogstad, Bjarte; Tjelmeland, Sigurd (IMR/PINRO Joint Report Series;5/2007, Conference object, 2007) -
Why did three capelin stock collapses in the Barents Sea affect the ecosystem differently?
Gjøsæter, Harald; Bogstad, Bjarte; Tjelmeland, Sigurd (IMR/PINRO Joint Report Series;5/2007, Conference object, 2007)