↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Träfflista för sökning "WFRF:(Kjell Sjöberg) srt2:(2000-2009)"

Search: WFRF:(Kjell Sjöberg) > (2000-2009)

Result 21-30 of 78

Sort/group result

Sort by: Hits per page:

Enumeration	Reference	Cover	Find
21.	Elmberg, Johan, et al. (author) Hur många får ligga i orubbat bo? 2003 In: Vår fågelvärld. - 0042-2649. ; :3, s. 28-29 Journal article (other academic/artistic)
22.	Elmberg, Johan, et al. (author) Hur påverkas andstammarna av jakt? 2000 In: Jakt och jägare. - 1401-8306. ; 60:10, s. 44-45 Journal article (pop. science, debate, etc.)
23.	Elmberg, Johan, et al. (author) Hur påverkas andstammarna av jakt? 2000 In: Jakt och jägare. - 1401-8306. ; 60:10, s. 44-45 Journal article (other academic/artistic)
24.	Elmberg, Johan, 1960-, et al. (author) Krickan - okänd kändis som vet att välja rätt sjö 2005 In: Vår fågelvärld. - 0042-2649. ; 64:3, s. 32-33 Journal article (pop. science, debate, etc.)
25.	Elmberg, Johan, et al. (author) Krickan - okänd kändis som vet att välja rätt sjö 2005 In: Vår fågelvärld. - 0042-2649. ; 64:3, s. 32-33 Journal article (other academic/artistic)
26.	Elmberg, Johan, et al. (author) Positive association in nesting mallard and teal : resource limitation and interspecific competition in the light of sensus data and a depletion experiment 2000 Conference paper (peer-reviewed)abstract Wing-clipped mallards were introduced on breeding lakes before the arrival of teal to induce resource limitation and interspecific competition, hypothesized to reduce lake use by teal. Experimental lakes had 2.9-8.0 times higher pair density of mallards than controls, but there was no negative response by teal to the treatment. We believe this is the first combined observational-experimental demonstration of lack of interspecific competition in waterfowl. Our results indicate that heterospecific attraction may affect co-existence in dabbling ducks.
27.	Elmberg, Johan, 1960-, et al. (author) The scientific basis for a new and sustainable management of migratory European ducks 2006 In: Wildlife Biology. - 0909-6396 .- 1903-220X. ; 12:2, s. 121-127 Journal article (peer-reviewed)abstract It is an axiom in ecology that knowing the sheer number of individuals in a population is of very little help if the objective is to understand future and past changes in population size. Yet, this is exactly how migratory European ducks are monitored, many of which are important quarry species in several countries. We argue that present monitoring is insufficient to address objectives of wise use and sustainability such as those emphasised in recent management directives and multilateral international agreements. The two main problems are the almost total lack of reliable data on recruitment and mortality. We advocate a pan-European monitoring system based on undisputed scientific principles; i.e. a long-term, coordinated and standardised scheme that produces data about vital rates of duck populations as well as about harvest size. Data from such a scheme can be used by game biologists to produce predictive tools, thus providing a functional basis for management decisions for adaptive harvesting and conservation alike.
28.	Elmberg, Johan, et al. (author) The scientific basis for a new and sustainable management of migratory European ducks 2006 In: Wildlife Biology. - : Nordic Council for Wildlife Research. - 0909-6396. ; 12:2, s. 121-127 Journal article (peer-reviewed)abstract It is an axiom in ecology that knowing the sheer number of individuals in a population is of very little help if the objective is to understand future and past changes in population size. Yet, this is exactly how migratory European ducks are monitored, many of which are important quarry species in several countries. We argue that present monitoring is insufficient to address objectives of wise use and sustainability such as those emphasised in recent management directives and multilateral international agreements. The two main problems are the almost total lack of reliable data on recruitment and mortality. We advocate a pan-European monitoring system based on undisputed scientific principles; i.e. a long-term, coordinated and standardised scheme that produces data about vital rates of duck populations as well as about harvest size. Data from such a scheme can be used by game biologists to produce predictive tools, thus providing a functional basis for management decisions for adaptive harvesting and conservation alike.
29.	Elmberg, Johan, et al. (author) Vitlök eller lingonsylt till andbröstet : avgör jakten hur mycket änder vi har? 2000 In: Vår fågelvärld. - 1942-2015. ; 59:3, s. 26-27 Journal article (pop. science, debate, etc.)
30.	Elmberg, Johan, et al. (author) Within-season sequential density dependence regulates breeding success in mallards Anas platyrhynchos 2005 In: Oikos. - 0030-1299 .- 1600-0706. ; 108, s. 582-590 Journal article (peer-reviewed)abstract Density dependence in vital rates is a key issue in population ecology but remains largely unexplored experimentally. We studied breeding success, lake use, and prey availability in wild mallards Anas platyrhynchos on small nemoral lakes in a replicated, two-year cross-over experiment in which pair density was increased. The number of wild mallards that settled on lakes prior to introductions of extra pairs did not differ between control and introduction years. Introductions led to a lake-level reduction in the number of broods observed. However, the number of stage 2/ (almost fledged) ducklings did not differ between treatments, nor did lake utilization by nonbreeding adults, broods and ducklings. Prey resource availability differed greatly among lakes, but it did not correlate with breeding success. Partialling out the possible effect of food competition from wild adult nonbreeding mallards did not change this conclusion. Our study demonstrates sequential density dependence in breeding success; introductions caused a decrease in brood number, but despite fewer broods a similar number of nearly fledged ducklings were produced. We suggest that predation and/or lake change of broods soon after hatching created these patterns. We conclude that using a single and late measure of breeding success such as fledged birds can mask regulatory processes. Implications of density dependence and its relation to individual reproductive success are understood better if breeding success is decomposed into nest success, duckling survival and fledgling survival.

Skapa referenser, mejla, bekava och länka

Permalink

Result 21-30 of 78

Refine your search

Type of publication: journal article (48); conference paper (22); reports (4); doctoral thesis (2); editorial collection (1); book chapter (1); show more...; show less...

Type of content: peer-reviewed (42); other academic/artistic (24); pop. science, debate, etc. (12)

Author/Editor: Sjöberg, Kjell (70); Nummi, Petri (66); Pöysä, Hannu (66); Elmberg, Johan (48); Gunnarsson, Gunnar (32); Elmberg, Johan, 1960 ... (18); show more...; Gunnarsson, Gunnar, ... (8); Larsson, Gerry (2); Nilsson, Sofia (2); Sjöberg, Misa (2); Guillemain, Matthieu (2); Dessborn, Lisa, 1976 ... (2); Dessborn, Lisa (2); Sjöberg, Karin (2); Ball, John (2); Clausen, Preben (2); Kallenberg, Kjell (2); Rodrigues, David (2); Väänänen, Veli-Matti (2); Gunnarson, Gunnar (2); Andersson, Kjell (1); Steen, Stig (1); Sjöberg, Trygve (1); Cinthio, Magnus (1); Pihl-Karlsson, Gunil ... (1); Ferm, Martin (1); Persson, Karin (1); Rydén Ahlgren, Åsa (1); Lindström, Kjell (1); Persson, Hans W (1); Edlund, Lars-Erik, 1 ... (1); Drottz Sjöberg, Brit ... (1); Reynolds, Larry (1); Serbanescu, Dan (1); Soneryd, Linda, 1971 ... (1); Szerszynski, Bronisl ... (1); Vetere, Ana (1); Kindberg, Jonas (1); Thurfjell, Henrik (1); Clark, Robert (1); Peterson, Kjell (1); De Jong, Adriaan (1); Dettki, Holger (1); Hörnell Willebrand, ... (1); Sundström, Olle (1); Lundberg, Per, Profe ... (1); Sjöberg, Kjell, Doce ... (1); Elmberg, Johan, Prof ... (1); Sjöberg, Kjell super ... (1); Elmberg, Johan super ... (1); show less...

University: Kristianstad University College (68); Swedish University of Agricultural Sciences (5); Swedish Environmental Protection Agency (2); Swedish National Defence College (2); Umeå University (1); Örebro University (1); show more...; Lund University (1); show less...

Language: English (53); Swedish (21); Finnish (4)

Research subject (UKÄ/SCB): Natural sciences (59); Agricultural Sciences (4); Medical and Health Sciences (1); Social Sciences (1)

Year

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

Copyright © LIBRIS - National Library Systems
LIBRIS.kb.se

pil uppåt

Close

Copy and save the link in order to return to this view