Geographical Variation in the Size of Body Organs in Seabirds
1. The size of body organs shows adaptive temporal variation in many animal species. The variation in the size of body organs was examined to see if it is also a component of local adaptation to geographical variation in ecological conditions. 2. Major body organs were measured in five species of Ic...
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| Veröffentlicht in: | Functional ecology 2000-06, Vol.14 (3), p.369-379 |
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| creator | Hilton, G. M. Lilliendahl, K. Solmundsson, J. Houston, D. C. Furness, R. W. |
| description | 1. The size of body organs shows adaptive temporal variation in many animal species. The variation in the size of body organs was examined to see if it is also a component of local adaptation to geographical variation in ecological conditions. 2. Major body organs were measured in five species of Icelandic seabirds, sampled from two areas where birds experience slightly different ecological conditions. Between-area differences in ecological conditions were consistent among the study species, allowing tests of the generality of ecological effects on organ size. 3. All major body organs showed geographical size variation. Livers and kidneys were larger in locations where daily energy expenditure was expected to be higher, small intestines were heavier where food was of lower energy density; stomachs were heavier where food was less digestible; heart and flight muscle were larger where flight costs were greater. 4. It is concluded that adaptive variation in organ size may be an important means by which animals optimize exploitation of their local environment, and may be a proximate factor in intraspecific life-history and metabolic variations between geographically separate populations. |
| doi_str_mv | 10.1046/j.1365-2435.2000.00431.x |
| format | Article |
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M. ; Lilliendahl, K. ; Solmundsson, J. ; Houston, D. C. ; Furness, R. W.</creator><creatorcontrib>Hilton, G. M. ; Lilliendahl, K. ; Solmundsson, J. ; Houston, D. C. ; Furness, R. W.</creatorcontrib><description>1. The size of body organs shows adaptive temporal variation in many animal species. The variation in the size of body organs was examined to see if it is also a component of local adaptation to geographical variation in ecological conditions. 2. Major body organs were measured in five species of Icelandic seabirds, sampled from two areas where birds experience slightly different ecological conditions. Between-area differences in ecological conditions were consistent among the study species, allowing tests of the generality of ecological effects on organ size. 3. All major body organs showed geographical size variation. Livers and kidneys were larger in locations where daily energy expenditure was expected to be higher, small intestines were heavier where food was of lower energy density; stomachs were heavier where food was less digestible; heart and flight muscle were larger where flight costs were greater. 4. It is concluded that adaptive variation in organ size may be an important means by which animals optimize exploitation of their local environment, and may be a proximate factor in intraspecific life-history and metabolic variations between geographically separate populations.</description><identifier>ISSN: 0269-8463</identifier><identifier>EISSN: 1365-2435</identifier><identifier>DOI: 10.1046/j.1365-2435.2000.00431.x</identifier><language>eng</language><publisher>Oxford, UK: British Ecological Association</publisher><subject>Animal and plant ecology ; Animal organs ; Animal, plant and microbial ecology ; Animals ; Auk ; Autoecology ; Aves ; Biological and medical sciences ; Birds ; Body size ; Flight muscles ; Foraging ; Fundamental and applied biological sciences. 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M.</creatorcontrib><creatorcontrib>Lilliendahl, K.</creatorcontrib><creatorcontrib>Solmundsson, J.</creatorcontrib><creatorcontrib>Houston, D. C.</creatorcontrib><creatorcontrib>Furness, R. W.</creatorcontrib><title>Geographical Variation in the Size of Body Organs in Seabirds</title><title>Functional ecology</title><description>1. The size of body organs shows adaptive temporal variation in many animal species. The variation in the size of body organs was examined to see if it is also a component of local adaptation to geographical variation in ecological conditions. 2. Major body organs were measured in five species of Icelandic seabirds, sampled from two areas where birds experience slightly different ecological conditions. Between-area differences in ecological conditions were consistent among the study species, allowing tests of the generality of ecological effects on organ size. 3. All major body organs showed geographical size variation. Livers and kidneys were larger in locations where daily energy expenditure was expected to be higher, small intestines were heavier where food was of lower energy density; stomachs were heavier where food was less digestible; heart and flight muscle were larger where flight costs were greater. 4. It is concluded that adaptive variation in organ size may be an important means by which animals optimize exploitation of their local environment, and may be a proximate factor in intraspecific life-history and metabolic variations between geographically separate populations.</description><subject>Animal and plant ecology</subject><subject>Animal organs</subject><subject>Animal, plant and microbial ecology</subject><subject>Animals</subject><subject>Auk</subject><subject>Autoecology</subject><subject>Aves</subject><subject>Biological and medical sciences</subject><subject>Birds</subject><subject>Body size</subject><subject>Flight muscles</subject><subject>Foraging</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>geographic variation</subject><subject>Human ecology</subject><subject>Iceland</subject><subject>Intestines</subject><subject>Laridae</subject><subject>local adaptation</subject><subject>organ size</subject><subject>Procellariiformes</subject><subject>Sea birds</subject><subject>Species</subject><subject>Stomach</subject><subject>Vertebrata</subject><issn>0269-8463</issn><issn>1365-2435</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqNkEFPwjAUgBujiYj-Aw87GG-bbdeWLtGDEkATEw6o1-axvUGXsWELEfz1bo7g1VNf8r7vNfkICRiNGBXqrohYrGTIRSwjTimNKBUxi3YnpHdcnJIe5SoJtVDxObnwvmjARHLeIw8TrBcO1kubQhl8gLOwsXUV2CrYLDGY2W8M6jx4qrN9MHULqHy7miHMrcv8JTnLofR4dXj75H08ehs-h6_Tycvw8TVMJR2wEDMFqRZJFicSqaA5akyoZkLoBJTGmGuuIQHQoHXGJFdcDeaYJ4ASMKVxn9x2d9eu_tyi35iV9SmWJVRYb71hmjJBmWxA3YGpq713mJu1sytwe8OoaXuZwrRZTJvFtL3Mby-za9Sbwx_gmxa5gyq1_s8XWgnFGuy-w75sift_nzfj0bAZGv260wu_qd1R50oqwUT8AxD2hTY</recordid><startdate>200006</startdate><enddate>200006</enddate><creator>Hilton, G. 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Psychology</topic><topic>geographic variation</topic><topic>Human ecology</topic><topic>Iceland</topic><topic>Intestines</topic><topic>Laridae</topic><topic>local adaptation</topic><topic>organ size</topic><topic>Procellariiformes</topic><topic>Sea birds</topic><topic>Species</topic><topic>Stomach</topic><topic>Vertebrata</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hilton, G. M.</creatorcontrib><creatorcontrib>Lilliendahl, K.</creatorcontrib><creatorcontrib>Solmundsson, J.</creatorcontrib><creatorcontrib>Houston, D. C.</creatorcontrib><creatorcontrib>Furness, R. 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All major body organs showed geographical size variation. Livers and kidneys were larger in locations where daily energy expenditure was expected to be higher, small intestines were heavier where food was of lower energy density; stomachs were heavier where food was less digestible; heart and flight muscle were larger where flight costs were greater. 4. It is concluded that adaptive variation in organ size may be an important means by which animals optimize exploitation of their local environment, and may be a proximate factor in intraspecific life-history and metabolic variations between geographically separate populations.</abstract><cop>Oxford, UK</cop><pub>British Ecological Association</pub><doi>10.1046/j.1365-2435.2000.00431.x</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Animal and plant ecology Animal organs Animal, plant and microbial ecology Animals Auk Autoecology Aves Biological and medical sciences Birds Body size Flight muscles Foraging Fundamental and applied biological sciences. Psychology geographic variation Human ecology Iceland Intestines Laridae local adaptation organ size Procellariiformes Sea birds Species Stomach Vertebrata |
| title | Geographical Variation in the Size of Body Organs in Seabirds |
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