The trophic ecology of marine catfishes in south-eastern Brazil
The stable isotope ratios of carbon (δ 13 C) and nitrogen (δ 15 N) and total mercury concentrations (THg) of the three marine catfish species Aspistor luniscutis , Bagre bagre and Genidens genidens were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-easter...
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| Veröffentlicht in: | Journal of the Marine Biological Association of the United Kingdom 2020-02, Vol.100 (1), p.133-142 |
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| creator | Gatts, Pedro V. Franco, Marcos A. L. Almeida, Marcelo G. Zalmon, Ilana R. Di Beneditto, Ana Paula M. Costa, Paulo A. S. de Rezende, Carlos E. |
| description | The stable isotope ratios of carbon (δ
13
C) and nitrogen (δ
15
N) and total mercury concentrations (THg) of the three marine catfish species
Aspistor luniscutis
,
Bagre bagre
and
Genidens genidens
were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ
13
C was similar among the three marine catfishes, whereas δ
15
N was similar in
A. luniscutis
and
B. bagre
and lower in
G. genidens
. THg was higher in
G. genidens
and lower in
B. bagre
. The greater assimilation of Sciaenidae fishes and squids by
A. luniscutis
and
B. bagre
resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For
G. genidens
, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in
G. genidens
is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ
15
N and THg with total length and total mass. Additionally, a significant correlation between THg and δ
15
N reflected the biomagnification process through the food web. |
| doi_str_mv | 10.1017/S0025315419001164 |
| format | Article |
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13
C) and nitrogen (δ
15
N) and total mercury concentrations (THg) of the three marine catfish species
Aspistor luniscutis
,
Bagre bagre
and
Genidens genidens
were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ
13
C was similar among the three marine catfishes, whereas δ
15
N was similar in
A. luniscutis
and
B. bagre
and lower in
G. genidens
. THg was higher in
G. genidens
and lower in
B. bagre
. The greater assimilation of Sciaenidae fishes and squids by
A. luniscutis
and
B. bagre
resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For
G. genidens
, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in
G. genidens
is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ
15
N and THg with total length and total mass. Additionally, a significant correlation between THg and δ
15
N reflected the biomagnification process through the food web.</description><identifier>ISSN: 0025-3154</identifier><identifier>EISSN: 1469-7769</identifier><identifier>DOI: 10.1017/S0025315419001164</identifier><language>eng</language><publisher>Cambridge: Cambridge University Press</publisher><subject>Aspistor luniscutis ; Assimilation ; Bagre bagre ; Bioaccumulation ; Biological magnification ; Carbon ; Catfish ; Coasts ; Competition ; Consumers ; Crustaceans ; Ecology ; Fish ; Food chains ; Food processing ; Food webs ; Freshwater fishes ; Genidens genidens ; Invertebrates ; Isotope ratios ; Isotopes ; Laboratories ; Marine biology ; Marine ecology ; Marine fishes ; Marine molluscs ; Mercury ; Mercury (metal) ; Niche overlap ; Niches ; Nitrogen ; Prey ; Ratios ; Redundancy ; Sediments ; Siluriformes ; Stable isotopes ; Trophic relationships</subject><ispartof>Journal of the Marine Biological Association of the United Kingdom, 2020-02, Vol.100 (1), p.133-142</ispartof><rights>Copyright Cambridge University Press Feb 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c273t-7dadd36293ae4d13c36e9c9c42a7b0d01812939e9eb5f83b2bb428f71a8832d73</citedby><cites>FETCH-LOGICAL-c273t-7dadd36293ae4d13c36e9c9c42a7b0d01812939e9eb5f83b2bb428f71a8832d73</cites><orcidid>0000-0003-3877-6093 ; 0000-0002-4248-9380 ; 0000-0002-8498-4486 ; 0000-0002-7939-6428</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids></links><search><creatorcontrib>Gatts, Pedro V.</creatorcontrib><creatorcontrib>Franco, Marcos A. L.</creatorcontrib><creatorcontrib>Almeida, Marcelo G.</creatorcontrib><creatorcontrib>Zalmon, Ilana R.</creatorcontrib><creatorcontrib>Di Beneditto, Ana Paula M.</creatorcontrib><creatorcontrib>Costa, Paulo A. S.</creatorcontrib><creatorcontrib>de Rezende, Carlos E.</creatorcontrib><title>The trophic ecology of marine catfishes in south-eastern Brazil</title><title>Journal of the Marine Biological Association of the United Kingdom</title><description>The stable isotope ratios of carbon (δ
13
C) and nitrogen (δ
15
N) and total mercury concentrations (THg) of the three marine catfish species
Aspistor luniscutis
,
Bagre bagre
and
Genidens genidens
were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ
13
C was similar among the three marine catfishes, whereas δ
15
N was similar in
A. luniscutis
and
B. bagre
and lower in
G. genidens
. THg was higher in
G. genidens
and lower in
B. bagre
. The greater assimilation of Sciaenidae fishes and squids by
A. luniscutis
and
B. bagre
resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For
G. genidens
, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in
G. genidens
is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ
15
N and THg with total length and total mass. Additionally, a significant correlation between THg and δ
15
N reflected the biomagnification process through the food web.</description><subject>Aspistor luniscutis</subject><subject>Assimilation</subject><subject>Bagre bagre</subject><subject>Bioaccumulation</subject><subject>Biological magnification</subject><subject>Carbon</subject><subject>Catfish</subject><subject>Coasts</subject><subject>Competition</subject><subject>Consumers</subject><subject>Crustaceans</subject><subject>Ecology</subject><subject>Fish</subject><subject>Food chains</subject><subject>Food processing</subject><subject>Food webs</subject><subject>Freshwater fishes</subject><subject>Genidens genidens</subject><subject>Invertebrates</subject><subject>Isotope ratios</subject><subject>Isotopes</subject><subject>Laboratories</subject><subject>Marine biology</subject><subject>Marine ecology</subject><subject>Marine fishes</subject><subject>Marine molluscs</subject><subject>Mercury</subject><subject>Mercury (metal)</subject><subject>Niche overlap</subject><subject>Niches</subject><subject>Nitrogen</subject><subject>Prey</subject><subject>Ratios</subject><subject>Redundancy</subject><subject>Sediments</subject><subject>Siluriformes</subject><subject>Stable isotopes</subject><subject>Trophic relationships</subject><issn>0025-3154</issn><issn>1469-7769</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNplkEFPhDAQhRujibj6A7w18Yx2OkDpyejGVZNNPLieSSmDsEGKLRzWXy9kvXl6h-_LTN5j7BrELQhQd-9CyBQhTUALAZAlJyyCJNOxUpk-ZdGC44Wfs4sQ9mKWMpVH7H7XEB-9G5rWcrKuc58H7mr-ZXzbE7dmrNvQUOBtz4ObxiYmE0byPX_05qftLtlZbbpAV3-5Yh-bp936Jd6-Pb-uH7axlQrHWFWmqjCTGg0lFaDFjLTVNpFGlaISkMPMNGkq0zrHUpZlIvNagclzlJXCFbs53h28-54ojMXeTb6fXxYSU0SUOk1nC46W9S4ET3Ux-HaucihAFMtOxb-d8Befv1mC</recordid><startdate>202002</startdate><enddate>202002</enddate><creator>Gatts, Pedro V.</creator><creator>Franco, Marcos A. 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L. ; Almeida, Marcelo G. ; Zalmon, Ilana R. ; Di Beneditto, Ana Paula M. ; Costa, Paulo A. S. ; de Rezende, Carlos E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c273t-7dadd36293ae4d13c36e9c9c42a7b0d01812939e9eb5f83b2bb428f71a8832d73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aspistor luniscutis</topic><topic>Assimilation</topic><topic>Bagre bagre</topic><topic>Bioaccumulation</topic><topic>Biological magnification</topic><topic>Carbon</topic><topic>Catfish</topic><topic>Coasts</topic><topic>Competition</topic><topic>Consumers</topic><topic>Crustaceans</topic><topic>Ecology</topic><topic>Fish</topic><topic>Food chains</topic><topic>Food processing</topic><topic>Food webs</topic><topic>Freshwater fishes</topic><topic>Genidens genidens</topic><topic>Invertebrates</topic><topic>Isotope ratios</topic><topic>Isotopes</topic><topic>Laboratories</topic><topic>Marine biology</topic><topic>Marine ecology</topic><topic>Marine fishes</topic><topic>Marine molluscs</topic><topic>Mercury</topic><topic>Mercury (metal)</topic><topic>Niche overlap</topic><topic>Niches</topic><topic>Nitrogen</topic><topic>Prey</topic><topic>Ratios</topic><topic>Redundancy</topic><topic>Sediments</topic><topic>Siluriformes</topic><topic>Stable isotopes</topic><topic>Trophic relationships</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gatts, Pedro V.</creatorcontrib><creatorcontrib>Franco, Marcos A. 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L.</au><au>Almeida, Marcelo G.</au><au>Zalmon, Ilana R.</au><au>Di Beneditto, Ana Paula M.</au><au>Costa, Paulo A. S.</au><au>de Rezende, Carlos E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The trophic ecology of marine catfishes in south-eastern Brazil</atitle><jtitle>Journal of the Marine Biological Association of the United Kingdom</jtitle><date>2020-02</date><risdate>2020</risdate><volume>100</volume><issue>1</issue><spage>133</spage><epage>142</epage><pages>133-142</pages><issn>0025-3154</issn><eissn>1469-7769</eissn><abstract>The stable isotope ratios of carbon (δ
13
C) and nitrogen (δ
15
N) and total mercury concentrations (THg) of the three marine catfish species
Aspistor luniscutis
,
Bagre bagre
and
Genidens genidens
were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ
13
C was similar among the three marine catfishes, whereas δ
15
N was similar in
A. luniscutis
and
B. bagre
and lower in
G. genidens
. THg was higher in
G. genidens
and lower in
B. bagre
. The greater assimilation of Sciaenidae fishes and squids by
A. luniscutis
and
B. bagre
resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For
G. genidens
, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in
G. genidens
is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ
15
N and THg with total length and total mass. Additionally, a significant correlation between THg and δ
15
N reflected the biomagnification process through the food web.</abstract><cop>Cambridge</cop><pub>Cambridge University Press</pub><doi>10.1017/S0025315419001164</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-3877-6093</orcidid><orcidid>https://orcid.org/0000-0002-4248-9380</orcidid><orcidid>https://orcid.org/0000-0002-8498-4486</orcidid><orcidid>https://orcid.org/0000-0002-7939-6428</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0025-3154 |
| ispartof | Journal of the Marine Biological Association of the United Kingdom, 2020-02, Vol.100 (1), p.133-142 |
| issn | 0025-3154 1469-7769 |
| language | eng |
| recordid | cdi_proquest_journals_2353332955 |
| source | Cambridge Journals |
| subjects | Aspistor luniscutis Assimilation Bagre bagre Bioaccumulation Biological magnification Carbon Catfish Coasts Competition Consumers Crustaceans Ecology Fish Food chains Food processing Food webs Freshwater fishes Genidens genidens Invertebrates Isotope ratios Isotopes Laboratories Marine biology Marine ecology Marine fishes Marine molluscs Mercury Mercury (metal) Niche overlap Niches Nitrogen Prey Ratios Redundancy Sediments Siluriformes Stable isotopes Trophic relationships |
| title | The trophic ecology of marine catfishes in south-eastern Brazil |
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