Density-dependent growth of the polychaete Diopatra aciculata
Effects of intraspecific density on growth of the tube-building polychaete Diopatra aciculata (Onuphidae) were examined over a three-month period within a marine worm aquaculture facility. Three polychaete densities (500, 1000 and 2000 worms/m2) were represented within triplicate 0.30 m2 boxes conta...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2006-12-01
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| Series: | Scientia Marina |
| Subjects: | |
| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/139 |
| _version_ | 1818741920549044224 |
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| author | Milada Safarik Anna M. Redden Maria J. Schreider |
| author_facet | Milada Safarik Anna M. Redden Maria J. Schreider |
| author_sort | Milada Safarik |
| collection | DOAJ |
| description | Effects of intraspecific density on growth of the tube-building polychaete Diopatra aciculata (Onuphidae) were examined over a three-month period within a marine worm aquaculture facility. Three polychaete densities (500, 1000 and 2000 worms/m2) were represented within triplicate 0.30 m2 boxes containing late juvenile D. aciculata, sandy sediment and recirculating seawater. Daily food ration per worm was held constant across all density levels. Total length, weight and number of segments were recorded for 20 polychaetes randomly removed from each of nine treatment boxes at weeks 1, 7 and 14. Mean daily growth was higher during weeks 1-7 than during weeks 7-14 for all growth variables at each density level. Polychaetes at the highest density level exhibited lower rates of growth and more broken and/or regenerating posterior segments than those at low density. High D. aciculata density was also associated with reduced dissolved oxygen concentrations and high polychaete mortality (20%). At medium polychaete density (1000/m2), D. aciculata exhibited low levels of apparent stress and high biomass return per unit area, both of which are important considerations in the aquaculture rearing of this species. We suggest that further studies focus on age- and size-related factors contributing to density effects on polychaete growth. |
| first_indexed | 2024-12-18T02:04:17Z |
| format | Article |
| id | doaj.art-dac7a260a989466f92e4c4cf2e5f1cb4 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-18T02:04:17Z |
| publishDate | 2006-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-dac7a260a989466f92e4c4cf2e5f1cb42022-12-21T21:24:40ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342006-12-0170S333734110.3989/scimar.2006.70s3337136Density-dependent growth of the polychaete Diopatra aciculataMilada Safarik0Anna M. Redden1Maria J. Schreider2School of Applied Sciences, Ourimbah Campus, University of NewcastleSchool of Applied Sciences, Ourimbah Campus, University of NewcastleSchool of Applied Sciences, Ourimbah Campus, University of NewcastleEffects of intraspecific density on growth of the tube-building polychaete Diopatra aciculata (Onuphidae) were examined over a three-month period within a marine worm aquaculture facility. Three polychaete densities (500, 1000 and 2000 worms/m2) were represented within triplicate 0.30 m2 boxes containing late juvenile D. aciculata, sandy sediment and recirculating seawater. Daily food ration per worm was held constant across all density levels. Total length, weight and number of segments were recorded for 20 polychaetes randomly removed from each of nine treatment boxes at weeks 1, 7 and 14. Mean daily growth was higher during weeks 1-7 than during weeks 7-14 for all growth variables at each density level. Polychaetes at the highest density level exhibited lower rates of growth and more broken and/or regenerating posterior segments than those at low density. High D. aciculata density was also associated with reduced dissolved oxygen concentrations and high polychaete mortality (20%). At medium polychaete density (1000/m2), D. aciculata exhibited low levels of apparent stress and high biomass return per unit area, both of which are important considerations in the aquaculture rearing of this species. We suggest that further studies focus on age- and size-related factors contributing to density effects on polychaete growth.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/139diopatra aciculataonuphidaetubewormpolychaete growthdensity-dependent growthintraspecific competitionaquaculture |
| spellingShingle | Milada Safarik Anna M. Redden Maria J. Schreider Density-dependent growth of the polychaete Diopatra aciculata Scientia Marina diopatra aciculata onuphidae tubeworm polychaete growth density-dependent growth intraspecific competition aquaculture |
| title | Density-dependent growth of the polychaete Diopatra aciculata |
| title_full | Density-dependent growth of the polychaete Diopatra aciculata |
| title_fullStr | Density-dependent growth of the polychaete Diopatra aciculata |
| title_full_unstemmed | Density-dependent growth of the polychaete Diopatra aciculata |
| title_short | Density-dependent growth of the polychaete Diopatra aciculata |
| title_sort | density dependent growth of the polychaete diopatra aciculata |
| topic | diopatra aciculata onuphidae tubeworm polychaete growth density-dependent growth intraspecific competition aquaculture |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/139 |
| work_keys_str_mv | AT miladasafarik densitydependentgrowthofthepolychaetediopatraaciculata AT annamredden densitydependentgrowthofthepolychaetediopatraaciculata AT mariajschreider densitydependentgrowthofthepolychaetediopatraaciculata |