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Field choice in spring and breeding performance of Greylag Geese Anser anser in Southern Sweden.

Nilsson, Leif LU ; Green, Martin LU and Kampe-Persson, Hakon (2002) In Wildfowl 53. p.7-25
Abstract
Selection and exploitation of feeding areas by pre-breeding and nonbreeding
Greylag Geese A nser anser, as we ll as by families, was studied
in a breeding area consisting of four lakes in Scania, southernmost
Sweden, in the years 1997-2000. Total production of young in each lake
as we ll as the breeding performance of neck collared individuals was
established annually, 1985-2000. This breeding population increased on
average 15.3% p e ra n n um, from 93 pairs in 1985 to 910 pairs in 2001. The
two main field types used by pre-breeding pairs, males of incubating
females and non-breeders in flocks were win te r wheat and grassland,
often switching from the fo rme r to the latter in mid-season. Almost... (More)
Selection and exploitation of feeding areas by pre-breeding and nonbreeding
Greylag Geese A nser anser, as we ll as by families, was studied
in a breeding area consisting of four lakes in Scania, southernmost
Sweden, in the years 1997-2000. Total production of young in each lake
as we ll as the breeding performance of neck collared individuals was
established annually, 1985-2000. This breeding population increased on
average 15.3% p e ra n n um, from 93 pairs in 1985 to 910 pairs in 2001. The
two main field types used by pre-breeding pairs, males of incubating
females and non-breeders in flocks were win te r wheat and grassland,
often switching from the fo rme r to the latter in mid-season. Almost all
feeding during brood- rearing took place on pastures grazed by livestock
or on a golf-course. Generally in spring, the rates of exploitation were
below 300-400 goose days ha"1, but rates of >1,000 goose days ha' 1 were
noted for one cereal field and two grassland areas. The rates of exploitation
by families varied markedly among brood-rearing areas as we ll as
years, being highest all through the study period on a grazed pasture,
where it ranged 800-1,350 goose days ha'1. Including the utilisation by
non-breeders, the annual exploitation of this pasture ranged from 1,400
to 2,500 goose days h a 1. At the only lake without grazing by livestock
(since the mid-1990s), significantly fewer goslings survived to fledging
than at the other lakes (45% vs 70%). Indications of density-dependent
effects on the productivity of sma ll young were noted at one of the lakes
(Klosterviken) but not at another (Yddingen). Most likely, the lack of any
density dependent effect, in spite of the very marked increase in the
breeding population during the study period at Yddingen, is the result of
access to highly fertilized grass on a golf course. (Less)
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Contribution to journal
publication status
published
subject
keywords
Greylag Goose, breeding result
in
Wildfowl
volume
53
pages
7 - 25
publisher
Wildfowl and Wetlands Trust
language
English
LU publication?
yes
id
f5f4a7e6-7a8a-4956-a236-23350d39e554
alternative location
http://wildfowl.wwt.org.uk/index.php/wildfowl/article/view/1114/1114
date added to LUP
2016-12-12 14:55:25
date last changed
2016-12-16 15:08:57
@article{f5f4a7e6-7a8a-4956-a236-23350d39e554,
  abstract     = {Selection and exploitation of feeding areas by pre-breeding and nonbreeding<br>
Greylag Geese A nser anser, as we ll as by families, was studied<br>
in a breeding area consisting of four lakes in Scania, southernmost<br>
Sweden, in the years 1997-2000. Total production of young in each lake<br>
as we ll as the breeding performance of neck collared individuals was<br>
established annually, 1985-2000. This breeding population increased on<br>
average 15.3% p e ra n n um, from 93 pairs in 1985 to 910 pairs in 2001. The<br>
two main field types used by pre-breeding pairs, males of incubating<br>
females and non-breeders in flocks were win te r wheat and grassland,<br>
often switching from the fo rme r to the latter in mid-season. Almost all<br>
feeding during brood- rearing took place on pastures grazed by livestock<br>
or on a golf-course. Generally in spring, the rates of exploitation were<br>
below 300-400 goose days ha"1, but rates of &gt;1,000 goose days ha' 1 were<br>
noted for one cereal field and two grassland areas. The rates of exploitation<br>
by families varied markedly among brood-rearing areas as we ll as<br>
years, being highest all through the study period on a grazed pasture,<br>
where it ranged 800-1,350 goose days ha'1. Including the utilisation by<br>
non-breeders, the annual exploitation of this pasture ranged from 1,400<br>
to 2,500 goose days h a 1. At the only lake without grazing by livestock<br>
(since the mid-1990s), significantly fewer goslings survived to fledging<br>
than at the other lakes (45% vs 70%). Indications of density-dependent<br>
effects on the productivity of sma ll young were noted at one of the lakes<br>
(Klosterviken) but not at another (Yddingen). Most likely, the lack of any<br>
density dependent effect, in spite of the very marked increase in the<br>
breeding population during the study period at Yddingen, is the result of<br>
access to highly fertilized grass on a golf course.},
  author       = {Nilsson, Leif and Green, Martin and Kampe-Persson, Hakon},
  keyword      = {Greylag Goose,breeding result},
  language     = {eng},
  pages        = {7--25},
  publisher    = {Wildfowl and Wetlands Trust},
  series       = {Wildfowl},
  title        = {Field choice in spring and breeding performance of Greylag Geese <em>Anser anser</em> in Southern Sweden.},
  volume       = {53},
  year         = {2002},
}