Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants
Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet com...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ibarra, Cynthia [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Anmerkung: |
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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| Übergeordnetes Werk: |
Enthalten in: Marine biology - Berlin : Springer, 1967, 169(2022), 12 vom: 15. Nov. |
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| Übergeordnetes Werk: |
volume:169 ; year:2022 ; number:12 ; day:15 ; month:11 |
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| DOI / URN: |
10.1007/s00227-022-04143-7 |
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SPR048628182 |
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| 520 | |a Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. | ||
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10.1007/s00227-022-04143-7 doi (DE-627)SPR048628182 (SPR)s00227-022-04143-7-e DE-627 ger DE-627 rakwb eng Ibarra, Cynthia verfasserin (orcid)0000-0001-9561-5531 aut Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. Trophic ecology (dpeaa)DE-He213 Sexual segregation (dpeaa)DE-He213 Seabirds (dpeaa)DE-He213 Cormorants (dpeaa)DE-He213 Diet composition (dpeaa)DE-He213 Isotopic niche (dpeaa)DE-He213 Marinao, Cristian aut Suárez, Nicolás aut Kasinsky, Tatiana aut Yorio, Pablo aut Enthalten in Marine biology Berlin : Springer, 1967 169(2022), 12 vom: 15. Nov. (DE-627)25377067X (DE-600)1459413-4 1432-1793 nnns volume:169 year:2022 number:12 day:15 month:11 https://dx.doi.org/10.1007/s00227-022-04143-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 169 2022 12 15 11 |
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10.1007/s00227-022-04143-7 doi (DE-627)SPR048628182 (SPR)s00227-022-04143-7-e DE-627 ger DE-627 rakwb eng Ibarra, Cynthia verfasserin (orcid)0000-0001-9561-5531 aut Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. Trophic ecology (dpeaa)DE-He213 Sexual segregation (dpeaa)DE-He213 Seabirds (dpeaa)DE-He213 Cormorants (dpeaa)DE-He213 Diet composition (dpeaa)DE-He213 Isotopic niche (dpeaa)DE-He213 Marinao, Cristian aut Suárez, Nicolás aut Kasinsky, Tatiana aut Yorio, Pablo aut Enthalten in Marine biology Berlin : Springer, 1967 169(2022), 12 vom: 15. Nov. (DE-627)25377067X (DE-600)1459413-4 1432-1793 nnns volume:169 year:2022 number:12 day:15 month:11 https://dx.doi.org/10.1007/s00227-022-04143-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 169 2022 12 15 11 |
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10.1007/s00227-022-04143-7 doi (DE-627)SPR048628182 (SPR)s00227-022-04143-7-e DE-627 ger DE-627 rakwb eng Ibarra, Cynthia verfasserin (orcid)0000-0001-9561-5531 aut Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. Trophic ecology (dpeaa)DE-He213 Sexual segregation (dpeaa)DE-He213 Seabirds (dpeaa)DE-He213 Cormorants (dpeaa)DE-He213 Diet composition (dpeaa)DE-He213 Isotopic niche (dpeaa)DE-He213 Marinao, Cristian aut Suárez, Nicolás aut Kasinsky, Tatiana aut Yorio, Pablo aut Enthalten in Marine biology Berlin : Springer, 1967 169(2022), 12 vom: 15. Nov. (DE-627)25377067X (DE-600)1459413-4 1432-1793 nnns volume:169 year:2022 number:12 day:15 month:11 https://dx.doi.org/10.1007/s00227-022-04143-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 169 2022 12 15 11 |
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10.1007/s00227-022-04143-7 doi (DE-627)SPR048628182 (SPR)s00227-022-04143-7-e DE-627 ger DE-627 rakwb eng Ibarra, Cynthia verfasserin (orcid)0000-0001-9561-5531 aut Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. Trophic ecology (dpeaa)DE-He213 Sexual segregation (dpeaa)DE-He213 Seabirds (dpeaa)DE-He213 Cormorants (dpeaa)DE-He213 Diet composition (dpeaa)DE-He213 Isotopic niche (dpeaa)DE-He213 Marinao, Cristian aut Suárez, Nicolás aut Kasinsky, Tatiana aut Yorio, Pablo aut Enthalten in Marine biology Berlin : Springer, 1967 169(2022), 12 vom: 15. Nov. (DE-627)25377067X (DE-600)1459413-4 1432-1793 nnns volume:169 year:2022 number:12 day:15 month:11 https://dx.doi.org/10.1007/s00227-022-04143-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 169 2022 12 15 11 |
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10.1007/s00227-022-04143-7 doi (DE-627)SPR048628182 (SPR)s00227-022-04143-7-e DE-627 ger DE-627 rakwb eng Ibarra, Cynthia verfasserin (orcid)0000-0001-9561-5531 aut Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. Trophic ecology (dpeaa)DE-He213 Sexual segregation (dpeaa)DE-He213 Seabirds (dpeaa)DE-He213 Cormorants (dpeaa)DE-He213 Diet composition (dpeaa)DE-He213 Isotopic niche (dpeaa)DE-He213 Marinao, Cristian aut Suárez, Nicolás aut Kasinsky, Tatiana aut Yorio, Pablo aut Enthalten in Marine biology Berlin : Springer, 1967 169(2022), 12 vom: 15. Nov. (DE-627)25377067X (DE-600)1459413-4 1432-1793 nnns volume:169 year:2022 number:12 day:15 month:11 https://dx.doi.org/10.1007/s00227-022-04143-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 169 2022 12 15 11 |
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. 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Ibarra, Cynthia |
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Ibarra, Cynthia misc Trophic ecology misc Sexual segregation misc Seabirds misc Cormorants misc Diet composition misc Isotopic niche Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants |
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Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants Trophic ecology (dpeaa)DE-He213 Sexual segregation (dpeaa)DE-He213 Seabirds (dpeaa)DE-He213 Cormorants (dpeaa)DE-He213 Diet composition (dpeaa)DE-He213 Isotopic niche (dpeaa)DE-He213 |
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misc Trophic ecology misc Sexual segregation misc Seabirds misc Cormorants misc Diet composition misc Isotopic niche |
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Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants |
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patterns of sexual segregation in the use of trophic resources in breeding imperial cormorants |
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Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants |
| abstract |
Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
| abstractGer |
Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
| abstract_unstemmed |
Abstract Many seabirds show sexual differences in different aspects of their trophic ecology. The Imperial Cormorant (Leucocarbo atriceps) presents sexual size dimorphism, with males being larger and heavier than females. They show sexual differences in feeding behaviour, but no studies have yet comprehensively quantified the sexual segregation in the use of food resources. Diet composition through the analysis of stomach content samples and isotopic niches of female and male individuals were assessed during the incubation and chick rearing stage of 2019 at Islas Blancas (44°46′S, 65°38′W) and Punta León (43°04′S, 64°29′W), Argentina. A total of 117 stomach content samples and 80 whole blood samples were analysed. The sexes differed significantly in their overall prey composition. Females consumed mostly benthic prey in all cases, while males consumed demersal, pelagic or benthic prey depending on the breeding stage and colony. Males presented a lower diet diversity and consumed larger prey items than females in all stages. The isotopic niche of females and males differed in position and/or amplitude, presenting variations in the axes, in agreement with the results based on conventional diet analysis. Females and males exhibited trophic resource partitioning, although patterns of segregation varied depending on the stages of the breeding cycle and the location of the colony. These patterns show the differential role of the sexes in marine food webs, and may expose females and males to different environmental and anthropogenic pressures. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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| title_short |
Patterns of sexual segregation in the use of trophic resources in breeding Imperial Cormorants |
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https://dx.doi.org/10.1007/s00227-022-04143-7 |
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Marinao, Cristian Suárez, Nicolás Kasinsky, Tatiana Yorio, Pablo |
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2024-07-03T20:26:43.370Z |
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| score |
7.4003944 |