Although it is a solitary nester, breeding densities from 2 per ha to per ha may occur depending on the quality of the habitat (Kushlan and Hancock . Start studying Fysikk 2 kapittel 1. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 2. A video exercise introduces students to the principle of equivalence and ERGO Fysikk 2 (Aschehoug, Oslo, ). [45] P. Jerstad, B.

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Ergo Fysikk 2 Oppgave B 29

Classical and Quantum Nolocality by P. It usually nests solitarily although males are polygamous and may mate with up fysikl five females nesting on a large wetland site del Hoyo et al. Population justification The global population is estimated to number c. The species remains solitary throughout the year del Hoyo et al.

Wordings may not come from in-copyright sources. National population estimates include: Continental populations are mainly migratory however Newbery et al. Disturbance at the breeding sites by recreation should be minimized.

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Diet Its diet varies depending fysiik the site and season although it predominantly takes fish particularly cyprinids and eels and amphibians as well as adult and larval insects, spiders, crustaceans, molluscs, snakes, lizards, birds, nestlings and small mammals del Hoyo et al.

Melvil Dewey invented his Dewey Decimal System inand early versions of his system are in the public domain. Wordings, which are entered by members, can only come from public domain sources.

The European Action Plan for this species recommends raising water levels, harvesting ergp burning reeds, cutting invasive scrub, or digging out reedbeds on a rotational compartmental basis as methods of slowing reedbed succession Newbery et al.

It also forages in running water e. Trend justification The overall population trend is decreasing, although some populations have unknown trends and others are stable Wetlands International Recommended citation BirdLife International Species factsheet: Works under MDS Your use of the site and services is subject to these policies and terms.


LibraryThing’s MDS system is based on the classification work of libraries around the world, whose assignments are not copyrightable. I Agree This site uses cookies to deliver our services, improve performance, for analytics, and if not signed in for advertising. Breeding adults are more attracted to unfragmented Puglisi et al.

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In Britain it was found that suitable habitats should be provided for all fish life stages including spawning, refuge and overwinteringthe movement of fish throughout reedbeds should be promoted e. Where useful or necessary, wording comes from the edition of the Dewey Decimal System.

The species avoids saline waters Kushlan and Hancock but is equally abundant in fresh or brackish habitats del Hoyo et al. Ashhurst A manual of experiments in physics: Although it is a solitary nester, breeding densities from 2 per ha to per ha may occur depending on the quality of the habitat Kushlan and Hancocknests sometimes being placed close together in areas where the species is particularly numerous Hancock and Kushlan Conservation Actions Proposed The following information refers to the species’s European range only: MDS “scheduldes” the words that describe the numbers are user-added, and based on public domain editions of the system.

Language and concepts may be changed to fit modern tastes, or to better describe books cataloged. There is evidence that females in Britain preferentially nest in locations surrounded by less scrub but more vegetated open water, with a higher proportion of Phragmites spp. Disturbance from humans during the nesting period is also a threat Newbery et al.

Recommended citation for factsheets for more than one species: Management information Breeding adults in Europe may be more attracted to unfragmented Puglisi et al. Habitat Breeding The species has highly restrictive breeding habitat requirements del Hoyo et al. The European population is estimated at 37, calling or lekking males, which equates to 75, mature individuals BirdLife International The hunting of adults and collecting of eggs and chicks still occurs in some areas del Hoyo et al.


It also recommends the regular cutting of small areas of reedbed to maintain Phragmites spp.

Behaviour Populations breeding on the Atlantic coast of Europe, in the Mediterranean and in South Africa are largely sedentary due to the relatively mild winters Newbery et al. The species is threatened mainly by the loss of Phragmites reed marshes Kushlan and Hancock owing to habitat alteration through drainage Kushlan and Hancockdirect destruction del Hoyo et al. Ganot Mathematica for Theoretical Physics: The European population is estimated to be stable BirdLife International Wording Edition Compends; textbooks.

It shows a strong preference for quiet lowland marshes around lakes and rivers less than m above sea-level Kushlan and Hancock with extensive dense young reedbeds of Phragmites spp.

Laboratory instruction for college classes by Joseph S. Breeding site The nest is a pad of reeds and other vegetation Kushlan and Hancock constructed close to or floating on water del Hoyo et al. Home Groups Talk Zeitgeist.

MDS classes with significant recommendations overlap, excluding ones under the same top-level class.

Measures should include sustainably managing river valleys and reed marshes, including the reduction of water pollution and fish overexploitation.

Breeding adults in Europe may be more attracted to unfragmented Puglisi et al. Non-breeding The species frequents a more varied range of habitats outside of breeding season, foraging on rice-fields, watercress beds, gravel pits, fish farms, ditches, sewage farms del Hoyo et al.

For these reasons the species is evaluated as Least Concern. Wetlands should also be managed to enhance the carrying capacity of fish and eel populations thus increasing food resources for bitterns Noble et al. Large-scale reed cutting should be prohibited in the late-winter however Kushlan and Hancock Elementary treatise on physics, experimental and applied, for the use of colleges and schools by A.

Text account compilers Ashpole, J, Butchart, S.