Food habits, feeding behaviour and impact of triploid bighead carp, Hypophthalmichthys nobilis, in experimental ponds
Food of sterile triploid bighead carp, Hypophthalmichthys nobilis, was examined in ponds receiving water from a hypereutrophic take in Florida. No distinctive seasonal changes in food composition were found. The fish fed selectively on Botryococcus braunii Kuetzing, a large nuisance algal species, w...
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| Veröffentlicht in: | Journal of fish biology 1993-04, Vol.42 (4), p.517-530 |
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| creator | Opuszynski, K. Shireman, J. V. |
| description | Food of sterile triploid bighead carp, Hypophthalmichthys nobilis, was examined in ponds receiving water from a hypereutrophic take in Florida. No distinctive seasonal changes in food composition were found. The fish fed selectively on Botryococcus braunii Kuetzing, a large nuisance algal species, which constituted 61% of the volume and 50% of the dry weight of the food. Zooplankton was highly selected, but constituted only 3% of the food volume because of the low zooplankton density in the ponds. The remaining proportion of food consisted mainly of blue‐green algae. Final fish biomass was low, ranging from 60 to 97 kg ha−1 in individual ponds. Low biomass was due to slow fish growth and high fish mortality. Despite low biomass, the fish lowered the ratio of blue‐green/green algae in the ponds and tended to lower phyto‐ and zooplankton abundance. |
| doi_str_mv | 10.1111/j.1095-8649.1993.tb00356.x |
| format | Article |
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V.</creatorcontrib><title>Food habits, feeding behaviour and impact of triploid bighead carp, Hypophthalmichthys nobilis, in experimental ponds</title><title>Journal of fish biology</title><description>Food of sterile triploid bighead carp, Hypophthalmichthys nobilis, was examined in ponds receiving water from a hypereutrophic take in Florida. No distinctive seasonal changes in food composition were found. The fish fed selectively on Botryococcus braunii Kuetzing, a large nuisance algal species, which constituted 61% of the volume and 50% of the dry weight of the food. Zooplankton was highly selected, but constituted only 3% of the food volume because of the low zooplankton density in the ponds. The remaining proportion of food consisted mainly of blue‐green algae. Final fish biomass was low, ranging from 60 to 97 kg ha−1 in individual ponds. Low biomass was due to slow fish growth and high fish mortality. Despite low biomass, the fish lowered the ratio of blue‐green/green algae in the ponds and tended to lower phyto‐ and zooplankton abundance.</description><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>eutrophication</subject><subject>fish impact</subject><subject>Fresh water ecosystems</subject><subject>Freshwater</subject><subject>Fundamental and applied biological sciences. 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V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4767-fd4f9cb1b747d656b9684e94900d8ed5315430f235506993601d95a7d548f50d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Biological and medical sciences</topic><topic>eutrophication</topic><topic>fish impact</topic><topic>Fresh water ecosystems</topic><topic>Freshwater</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Hypophthalmichthys nobilis</topic><topic>plankton</topic><topic>Synecology</topic><topic>water quality</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Opuszynski, K.</creatorcontrib><creatorcontrib>Shireman, J. 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V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Food habits, feeding behaviour and impact of triploid bighead carp, Hypophthalmichthys nobilis, in experimental ponds</atitle><jtitle>Journal of fish biology</jtitle><date>1993-04</date><risdate>1993</risdate><volume>42</volume><issue>4</issue><spage>517</spage><epage>530</epage><pages>517-530</pages><issn>0022-1112</issn><eissn>1095-8649</eissn><coden>JFIBA9</coden><abstract>Food of sterile triploid bighead carp, Hypophthalmichthys nobilis, was examined in ponds receiving water from a hypereutrophic take in Florida. No distinctive seasonal changes in food composition were found. The fish fed selectively on Botryococcus braunii Kuetzing, a large nuisance algal species, which constituted 61% of the volume and 50% of the dry weight of the food. Zooplankton was highly selected, but constituted only 3% of the food volume because of the low zooplankton density in the ponds. The remaining proportion of food consisted mainly of blue‐green algae. Final fish biomass was low, ranging from 60 to 97 kg ha−1 in individual ponds. Low biomass was due to slow fish growth and high fish mortality. Despite low biomass, the fish lowered the ratio of blue‐green/green algae in the ponds and tended to lower phyto‐ and zooplankton abundance.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1095-8649.1993.tb00356.x</doi><tpages>14</tpages></addata></record> |
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| ispartof | Journal of fish biology, 1993-04, Vol.42 (4), p.517-530 |
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| language | eng |
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| subjects | Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences eutrophication fish impact Fresh water ecosystems Freshwater Fundamental and applied biological sciences. Psychology Hypophthalmichthys nobilis plankton Synecology water quality |
| title | Food habits, feeding behaviour and impact of triploid bighead carp, Hypophthalmichthys nobilis, in experimental ponds |
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