Size‐based sexual dimorphism of nitrogen excretion in livebearing fishes
Nitrogen (N) and phosphorus (P) are important limiting or co‐limiting nutrients in many aquatic ecosystems. Consumers such as fishes can significantly impact the balance and redistribution of these nutrients through consumer‐driven nutrient recycling. Intraspecific variation in nutrient excretion ra...
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| Veröffentlicht in: | Ecology of freshwater fish 2019-04, Vol.28 (2), p.222-228 |
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| creator | Ambus, Nicholas Moody, Eric K. |
| description | Nitrogen (N) and phosphorus (P) are important limiting or co‐limiting nutrients in many aquatic ecosystems. Consumers such as fishes can significantly impact the balance and redistribution of these nutrients through consumer‐driven nutrient recycling. Intraspecific variation in nutrient excretion rates can therefore have significant ecosystem impacts. Among individuals of sexually dimorphic consumers, variation in population size structure and sex ratio could potentially have impacts of similar magnitude. We tested for the effects of body size and sex on consumer‐driven nutrient recycling by measuring N and P excretion rates from eight species of poeciliid fishes. We found a strong positive effect of size on N excretion rates, as has been previously described among species. However, we found no effect of size on P excretion rates, nor did we find any difference in N or P excretion rates between sexes. Our work provides a preliminary analysis of how sexual dimorphism can lead to disparate nutrient excretion rates within consumer populations. These results indicate that variation in population sex ratios of sexually dimorphic consumers could have impacts at the ecosystem scale. |
| doi_str_mv | 10.1111/eff.12445 |
| format | Article |
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Consumers such as fishes can significantly impact the balance and redistribution of these nutrients through consumer‐driven nutrient recycling. Intraspecific variation in nutrient excretion rates can therefore have significant ecosystem impacts. Among individuals of sexually dimorphic consumers, variation in population size structure and sex ratio could potentially have impacts of similar magnitude. We tested for the effects of body size and sex on consumer‐driven nutrient recycling by measuring N and P excretion rates from eight species of poeciliid fishes. We found a strong positive effect of size on N excretion rates, as has been previously described among species. However, we found no effect of size on P excretion rates, nor did we find any difference in N or P excretion rates between sexes. Our work provides a preliminary analysis of how sexual dimorphism can lead to disparate nutrient excretion rates within consumer populations. 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These results indicate that variation in population sex ratios of sexually dimorphic consumers could have impacts at the ecosystem scale.</description><subject>Aquatic ecosystems</subject><subject>Body size</subject><subject>Constraining</subject><subject>Consumers</subject><subject>ecological stoichiometry</subject><subject>Ecosystems</subject><subject>Environmental impact</subject><subject>Excretion</subject><subject>guppy</subject><subject>Limiting factors</subject><subject>Limiting nutrients</subject><subject>Mineral nutrients</subject><subject>Nitrogen</subject><subject>Nutrient balance</subject><subject>nutrient recycling</subject><subject>Nutrients</subject><subject>Phosphorus</subject><subject>poeciliidae</subject><subject>Population number</subject><subject>Ratios</subject><subject>Recycling</subject><subject>Sex</subject><subject>Sex ratio</subject><subject>Sexual dimorphism</subject><subject>Variation</subject><subject>viviparous</subject><issn>0906-6691</issn><issn>1600-0633</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp1kMtOAjEUhhujiYgufIMmrlwM9DLToUtDADUkLmTf9HIKJcMMtqDgykfwGX0SR8etZ_NvvnP-kw-ha0oGtJ0heD-gLM-LE9SjgpCMCM5PUY9IIjIhJD1HFymtCaFMlqyHHp_DO3x9fBqdwOEEh72usAubJm5XIW1w43EddrFZQo3hYCPsQlPjUOMqvIIBHUO9xD6kFaRLdOZ1leDqL_toMZ0sxvfZ_Gn2ML6bZ5ZzVmTUaw5CaM8ds5DTkWPSFYXNpfHlyBfMGqdd4c2IEWq8L9pPde5Ly0oDxPI-uunObmPzsoe0U-tmH-u2UTEquZSlkHlL3XaUjU1KEbzaxrDR8agoUT-mVGtK_Zpq2WHHvoUKjv-DajKddhvfM8psQw</recordid><startdate>201904</startdate><enddate>201904</enddate><creator>Ambus, Nicholas</creator><creator>Moody, Eric K.</creator><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7QH</scope><scope>7SN</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H95</scope><scope>H97</scope><scope>L.G</scope><scope>P64</scope><scope>RC3</scope><orcidid>https://orcid.org/0000-0002-7484-448X</orcidid></search><sort><creationdate>201904</creationdate><title>Size‐based sexual dimorphism of nitrogen excretion in livebearing fishes</title><author>Ambus, Nicholas ; Moody, Eric K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3325-1fa3e66af3d2ce418d29d55c49bf78f52cbdad5fb8201bff5129a4f7c27be0c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Aquatic ecosystems</topic><topic>Body size</topic><topic>Constraining</topic><topic>Consumers</topic><topic>ecological stoichiometry</topic><topic>Ecosystems</topic><topic>Environmental impact</topic><topic>Excretion</topic><topic>guppy</topic><topic>Limiting factors</topic><topic>Limiting nutrients</topic><topic>Mineral nutrients</topic><topic>Nitrogen</topic><topic>Nutrient balance</topic><topic>nutrient recycling</topic><topic>Nutrients</topic><topic>Phosphorus</topic><topic>poeciliidae</topic><topic>Population number</topic><topic>Ratios</topic><topic>Recycling</topic><topic>Sex</topic><topic>Sex ratio</topic><topic>Sexual dimorphism</topic><topic>Variation</topic><topic>viviparous</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ambus, Nicholas</creatorcontrib><creatorcontrib>Moody, Eric K.</creatorcontrib><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Aqualine</collection><collection>Ecology Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><jtitle>Ecology of freshwater fish</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ambus, Nicholas</au><au>Moody, Eric K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Size‐based sexual dimorphism of nitrogen excretion in livebearing fishes</atitle><jtitle>Ecology of freshwater fish</jtitle><date>2019-04</date><risdate>2019</risdate><volume>28</volume><issue>2</issue><spage>222</spage><epage>228</epage><pages>222-228</pages><issn>0906-6691</issn><eissn>1600-0633</eissn><abstract>Nitrogen (N) and phosphorus (P) are important limiting or co‐limiting nutrients in many aquatic ecosystems. Consumers such as fishes can significantly impact the balance and redistribution of these nutrients through consumer‐driven nutrient recycling. Intraspecific variation in nutrient excretion rates can therefore have significant ecosystem impacts. Among individuals of sexually dimorphic consumers, variation in population size structure and sex ratio could potentially have impacts of similar magnitude. We tested for the effects of body size and sex on consumer‐driven nutrient recycling by measuring N and P excretion rates from eight species of poeciliid fishes. We found a strong positive effect of size on N excretion rates, as has been previously described among species. However, we found no effect of size on P excretion rates, nor did we find any difference in N or P excretion rates between sexes. Our work provides a preliminary analysis of how sexual dimorphism can lead to disparate nutrient excretion rates within consumer populations. 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| ispartof | Ecology of freshwater fish, 2019-04, Vol.28 (2), p.222-228 |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Aquatic ecosystems Body size Constraining Consumers ecological stoichiometry Ecosystems Environmental impact Excretion guppy Limiting factors Limiting nutrients Mineral nutrients Nitrogen Nutrient balance nutrient recycling Nutrients Phosphorus poeciliidae Population number Ratios Recycling Sex Sex ratio Sexual dimorphism Variation viviparous |
| title | Size‐based sexual dimorphism of nitrogen excretion in livebearing fishes |
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