Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors
This study determines Cormorant (Phalacrocorax carbo sinensis) diet composition and prey size at two areas 6 kmapart, atBayLövstabukten, Sweden, in 2005.The study entails the examination of 333 pellets and 2,669 regurgitated fish. To determine the size of the predated fish based onworn otoliths foun...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.662.7429 2023-05-15T16:36:28+02:00 Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors Maria K. Boström Sven-gunnar Lunneryd Hanna Ståhlberg Lars Karlsson Bjarne Ragnarsson The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.7429 http://ornisfennica.org/pdf/latest/2Bostrom.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.7429 http://ornisfennica.org/pdf/latest/2Bostrom.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://ornisfennica.org/pdf/latest/2Bostrom.pdf text 2012 ftciteseerx 2016-01-08T16:57:13Z This study determines Cormorant (Phalacrocorax carbo sinensis) diet composition and prey size at two areas 6 kmapart, atBayLövstabukten, Sweden, in 2005.The study entails the examination of 333 pellets and 2,669 regurgitated fish. To determine the size of the predated fish based onworn otoliths found in pellets, size-correction factorswere applied. Regression slopes between fish size and otolith size were applied to estimate the original size of the predated fish. Both pellet-based and regurgitated-fish-based analyses sug-gested the same dominating prey species by biomass. Based on pellets, Herring (Clupea harengus; 32.5%), European Perch (Perca fluviatilis; 20.9%) and Eelpout (Zoarces viviparus; 18.5%) dominated the diet. Regurgitated-fish samples contained species that were not found in pellets. These were mostly species with small and easily-eroding oto-liths, such as Three-spined Stickleback (Gasterosteus aculeatus) and Greater Sand Eel (Hyperoplus lanceolatus). Cormorant diet between the two areas differed, and within both areas there were gradual changes in diet composition between incubation, nestling, chick and fledgling phases. 1. Text Hyperoplus lanceolatus Unknown |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
This study determines Cormorant (Phalacrocorax carbo sinensis) diet composition and prey size at two areas 6 kmapart, atBayLövstabukten, Sweden, in 2005.The study entails the examination of 333 pellets and 2,669 regurgitated fish. To determine the size of the predated fish based onworn otoliths found in pellets, size-correction factorswere applied. Regression slopes between fish size and otolith size were applied to estimate the original size of the predated fish. Both pellet-based and regurgitated-fish-based analyses sug-gested the same dominating prey species by biomass. Based on pellets, Herring (Clupea harengus; 32.5%), European Perch (Perca fluviatilis; 20.9%) and Eelpout (Zoarces viviparus; 18.5%) dominated the diet. Regurgitated-fish samples contained species that were not found in pellets. These were mostly species with small and easily-eroding oto-liths, such as Three-spined Stickleback (Gasterosteus aculeatus) and Greater Sand Eel (Hyperoplus lanceolatus). Cormorant diet between the two areas differed, and within both areas there were gradual changes in diet composition between incubation, nestling, chick and fledgling phases. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Maria K. Boström Sven-gunnar Lunneryd Hanna Ståhlberg Lars Karlsson Bjarne Ragnarsson |
spellingShingle |
Maria K. Boström Sven-gunnar Lunneryd Hanna Ståhlberg Lars Karlsson Bjarne Ragnarsson Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors |
author_facet |
Maria K. Boström Sven-gunnar Lunneryd Hanna Ståhlberg Lars Karlsson Bjarne Ragnarsson |
author_sort |
Maria K. Boström |
title |
Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors |
title_short |
Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors |
title_full |
Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors |
title_fullStr |
Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors |
title_full_unstemmed |
Diet of the Great Cormorant (Phalacrocorax carbo sinensis) at two areas at Lövstabukten, South Bothnian Sea, Sweden, based on otolith size-correction factors |
title_sort |
diet of the great cormorant (phalacrocorax carbo sinensis) at two areas at lövstabukten, south bothnian sea, sweden, based on otolith size-correction factors |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.7429 http://ornisfennica.org/pdf/latest/2Bostrom.pdf |
genre |
Hyperoplus lanceolatus |
genre_facet |
Hyperoplus lanceolatus |
op_source |
http://ornisfennica.org/pdf/latest/2Bostrom.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.7429 http://ornisfennica.org/pdf/latest/2Bostrom.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766026812577546240 |