Individual dietary specialization reduces intraspecific competition, rather than feeding activity, in black amur bream (Megalobrama terminalis)
Individual specialization and high plasticity in feeding activity are common in natural populations. However, the role of these two in intraspecific competition is unclear. In this study, the rhythm of feeding activity, dietary composition, niche width, niche overlap, and individual specialization w...
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| Veröffentlicht in: | Scientific reports 2020-10, Vol.10 (1), p.17961-17961, Article 17961 |
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| description | Individual specialization and high plasticity in feeding activity are common in natural populations. However, the role of these two in intraspecific competition is unclear. In this study, the rhythm of feeding activity, dietary composition, niche width, niche overlap, and individual specialization was explored in four different size groups of black amur bream (
Megalobrama terminalis
), using microscopic identification of foregut contents and stable isotope analysis (
δ
13
C and
δ
15
N) of dorsal muscle. Both methods observed ontogenetic shifts in dietary preference and individual specializations, and revealed that the total niche width of large individuals was greater than small individuals. Mixed linear models indicated that feeding activity was significantly influenced by time (
p
|
| doi_str_mv | 10.1038/s41598-020-74997-8 |
| format | Article |
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Megalobrama terminalis
), using microscopic identification of foregut contents and stable isotope analysis (
δ
13
C and
δ
15
N) of dorsal muscle. Both methods observed ontogenetic shifts in dietary preference and individual specializations, and revealed that the total niche width of large individuals was greater than small individuals. Mixed linear models indicated that feeding activity was significantly influenced by time (
p
< 0.0001), and no significant changes among size groups was evident (
p
= 0.244). Niche overlaps revealed that there was intensive diet competition between different size groups of black amur bream. Individual specialization in small juveniles was likely to be stronger than sub-adult and adult groups. Pearson’s correlation analysis revealed that the individual specialization was positively correlated with mean diet similarity within a group. The results indicated that intraspecific competition is reduced mainly by individual dietary specialization, rather than shift in feeding activity.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/s41598-020-74997-8</identifier><identifier>PMID: 33087846</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>631/158/2459 ; 631/158/2466 ; Animals ; Competition ; Correlation analysis ; Diet ; Ecosystem ; Feeding ; Feeding Behavior ; Fishes - metabolism ; Fishes - physiology ; Food Preferences - physiology ; Foregut ; Gastrointestinal Contents - chemistry ; Humanities and Social Sciences ; Megalobrama terminalis ; multidisciplinary ; Muscle, Skeletal - metabolism ; Natural populations ; Niche overlap ; Ontogeny ; Predatory Behavior ; Science ; Science (multidisciplinary) ; Specialization ; Stable isotopes</subject><ispartof>Scientific reports, 2020-10, Vol.10 (1), p.17961-17961, Article 17961</ispartof><rights>The Author(s) 2020</rights><rights>The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c511t-cc9cc185cf1e28909cbe650a002d5ea5883f3d155e99712e523b3fbd4cbfd8773</citedby><cites>FETCH-LOGICAL-c511t-cc9cc185cf1e28909cbe650a002d5ea5883f3d155e99712e523b3fbd4cbfd8773</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7578825/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7578825/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,27922,27923,41118,42187,51574,53789,53791</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33087846$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Xia, Yuguo</creatorcontrib><creatorcontrib>Li, Yuefei</creatorcontrib><creatorcontrib>Zhu, Shuli</creatorcontrib><creatorcontrib>Li, Jie</creatorcontrib><creatorcontrib>Li, Shanghao</creatorcontrib><creatorcontrib>Li, Xinhui</creatorcontrib><title>Individual dietary specialization reduces intraspecific competition, rather than feeding activity, in black amur bream (Megalobrama terminalis)</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>Individual specialization and high plasticity in feeding activity are common in natural populations. However, the role of these two in intraspecific competition is unclear. In this study, the rhythm of feeding activity, dietary composition, niche width, niche overlap, and individual specialization was explored in four different size groups of black amur bream (
Megalobrama terminalis
), using microscopic identification of foregut contents and stable isotope analysis (
δ
13
C and
δ
15
N) of dorsal muscle. Both methods observed ontogenetic shifts in dietary preference and individual specializations, and revealed that the total niche width of large individuals was greater than small individuals. Mixed linear models indicated that feeding activity was significantly influenced by time (
p
< 0.0001), and no significant changes among size groups was evident (
p
= 0.244). Niche overlaps revealed that there was intensive diet competition between different size groups of black amur bream. Individual specialization in small juveniles was likely to be stronger than sub-adult and adult groups. Pearson’s correlation analysis revealed that the individual specialization was positively correlated with mean diet similarity within a group. The results indicated that intraspecific competition is reduced mainly by individual dietary specialization, rather than shift in feeding activity.</description><subject>631/158/2459</subject><subject>631/158/2466</subject><subject>Animals</subject><subject>Competition</subject><subject>Correlation analysis</subject><subject>Diet</subject><subject>Ecosystem</subject><subject>Feeding</subject><subject>Feeding Behavior</subject><subject>Fishes - metabolism</subject><subject>Fishes - physiology</subject><subject>Food Preferences - physiology</subject><subject>Foregut</subject><subject>Gastrointestinal Contents - chemistry</subject><subject>Humanities and Social Sciences</subject><subject>Megalobrama terminalis</subject><subject>multidisciplinary</subject><subject>Muscle, Skeletal - metabolism</subject><subject>Natural populations</subject><subject>Niche overlap</subject><subject>Ontogeny</subject><subject>Predatory Behavior</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Specialization</subject><subject>Stable isotopes</subject><issn>2045-2322</issn><issn>2045-2322</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kctu1TAQhi1ERavSF2CBLLEpUkN9iU-cDVJVcanUqhtYWxN7co5L4hxsp1J5CV4Zp6eUwgJvxtJ888_lJ-QVZ-84k_o01Vy1umKCVU3dtk2ln5EDwWpVCSnE8yf_fXKU0g0rT4m25u0Lsi8l042uVwfk50Vw_ta7GQbqPGaIdzRt0XoY_A_Ifgo0opstJupDjnCf672ldhq3mP1CnNAIeYOR5g0E2iM6H9YUbC7C-e6kFNJuAPuNwjhH2kWEkR5f4RqGqYswAs0YRx9Kx_T2JdnrYUh49BAPydePH76cf64urz9dnJ9dVlZxnitrW2u5VrbnKHTLWtvhSjFgTDiFoLSWvXRcKSyn4QKVkJ3sO1fbrne6aeQheb_T3c7diM7istxgttGP5QRmAm_-zgS_Mevp1jSq0VqoInD8IBCn7zOmbEafLA4DBJzmZESt5ErLVaML-uYf9GaaY9l3oRqumFJ8mUjsKBunlCL2j8NwZhbLzc5yUyw395abRfr10zUeS34bXAC5A1JJhTXGP73_I_sLmj67EQ</recordid><startdate>20201021</startdate><enddate>20201021</enddate><creator>Xia, Yuguo</creator><creator>Li, Yuefei</creator><creator>Zhu, Shuli</creator><creator>Li, Jie</creator><creator>Li, Shanghao</creator><creator>Li, Xinhui</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><scope>C6C</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>88I</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2P</scope><scope>M7P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20201021</creationdate><title>Individual dietary specialization reduces intraspecific competition, rather than feeding activity, in black amur bream (Megalobrama terminalis)</title><author>Xia, Yuguo ; 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However, the role of these two in intraspecific competition is unclear. In this study, the rhythm of feeding activity, dietary composition, niche width, niche overlap, and individual specialization was explored in four different size groups of black amur bream (
Megalobrama terminalis
), using microscopic identification of foregut contents and stable isotope analysis (
δ
13
C and
δ
15
N) of dorsal muscle. Both methods observed ontogenetic shifts in dietary preference and individual specializations, and revealed that the total niche width of large individuals was greater than small individuals. Mixed linear models indicated that feeding activity was significantly influenced by time (
p
< 0.0001), and no significant changes among size groups was evident (
p
= 0.244). Niche overlaps revealed that there was intensive diet competition between different size groups of black amur bream. Individual specialization in small juveniles was likely to be stronger than sub-adult and adult groups. Pearson’s correlation analysis revealed that the individual specialization was positively correlated with mean diet similarity within a group. The results indicated that intraspecific competition is reduced mainly by individual dietary specialization, rather than shift in feeding activity.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>33087846</pmid><doi>10.1038/s41598-020-74997-8</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| source | MEDLINE; DOAJ Directory of Open Access Journals; Springer Nature OA Free Journals; Nature Free; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | 631/158/2459 631/158/2466 Animals Competition Correlation analysis Diet Ecosystem Feeding Feeding Behavior Fishes - metabolism Fishes - physiology Food Preferences - physiology Foregut Gastrointestinal Contents - chemistry Humanities and Social Sciences Megalobrama terminalis multidisciplinary Muscle, Skeletal - metabolism Natural populations Niche overlap Ontogeny Predatory Behavior Science Science (multidisciplinary) Specialization Stable isotopes |
| title | Individual dietary specialization reduces intraspecific competition, rather than feeding activity, in black amur bream (Megalobrama terminalis) |
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