Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event
In 1990, there was an unusual brown tide bloom of an aberrant Chrysophyte sp, in Baffin Bay and Laguna Madre near Corpus Christi, Texas. Coincident with the bloom was a dramatic loss of shellfish in Baffin Bay and Laguna Madre, The dominant clam, Mulinia lateralis. disappeared for about two years. W...
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National Shellfisheries Association
1993
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Online Access: | http://www.bioone.org/loi/shre https://tamucc-ir.tdl.org/handle/1969.6/87004http://www.bioone.org/loi/shre |
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fttexasamucorpus:oai:tamucc-ir.tdl.org:1969.6/87004 2023-10-25T01:36:51+02:00 Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event Montagna, Paul A. 1993 application/pdf http://www.bioone.org/loi/shre https://tamucc-ir.tdl.org/handle/1969.6/87004http://www.bioone.org/loi/shre unknown National Shellfisheries Association MZ9YRSSK http://www.bioone.org/loi/shre https://tamucc-ir.tdl.org/handle/1969.6/87004http://www.bioone.org/loi/shre text article 1993 fttexasamucorpus 2023-09-25T10:20:20Z In 1990, there was an unusual brown tide bloom of an aberrant Chrysophyte sp, in Baffin Bay and Laguna Madre near Corpus Christi, Texas. Coincident with the bloom was a dramatic loss of shellfish in Baffin Bay and Laguna Madre, The dominant clam, Mulinia lateralis. disappeared for about two years. Wc performed a series of experiments to determine if disappearance of M. lateralis was related to negative feeding interactions with the brown tide organism, Radioactive tracers were used to compare feeding rates on brown tide, Isochrysis galbana, DUllalielia tertioleera. and Heterocapsa pygmeae. At low cell concentrations « I,000 cells' ml" I), M. lateralis grazing rates (ccll . h-I) increased with concentration and were similar among the microalgal species. At higher concentrations, grazing rates on lsochrysis were inhibited, but remained the same for the other microalgal species. Assimilation efficiency by M. lateralis was lowest on Heterocapsa, and was about the same for the three other species of algae. The high grazing and assimilation rates of brown tide by M. lateralis indicate that the loss of the clam population was not likely caused by a negative trophic effect of the brown tide. Other bloom factors, e.g. reproductive effects or toxic effects, may have contributed to the concomitant loss of the clam population and the occurrence of brown tide. It is also possible that non-bloom factors, e.g. natural population variability increased predation pressure, could have caused the population loss. The reduced populations of filter feeders could have been partially responsible for conditions conducive for the brown tide bloom. Published Article in Journal/Newspaper Baffin Bay Texas A&M University - Corpus Christi: DSpace Repository Baffin Bay |
institution |
Open Polar |
collection |
Texas A&M University - Corpus Christi: DSpace Repository |
op_collection_id |
fttexasamucorpus |
language |
unknown |
description |
In 1990, there was an unusual brown tide bloom of an aberrant Chrysophyte sp, in Baffin Bay and Laguna Madre near Corpus Christi, Texas. Coincident with the bloom was a dramatic loss of shellfish in Baffin Bay and Laguna Madre, The dominant clam, Mulinia lateralis. disappeared for about two years. Wc performed a series of experiments to determine if disappearance of M. lateralis was related to negative feeding interactions with the brown tide organism, Radioactive tracers were used to compare feeding rates on brown tide, Isochrysis galbana, DUllalielia tertioleera. and Heterocapsa pygmeae. At low cell concentrations « I,000 cells' ml" I), M. lateralis grazing rates (ccll . h-I) increased with concentration and were similar among the microalgal species. At higher concentrations, grazing rates on lsochrysis were inhibited, but remained the same for the other microalgal species. Assimilation efficiency by M. lateralis was lowest on Heterocapsa, and was about the same for the three other species of algae. The high grazing and assimilation rates of brown tide by M. lateralis indicate that the loss of the clam population was not likely caused by a negative trophic effect of the brown tide. Other bloom factors, e.g. reproductive effects or toxic effects, may have contributed to the concomitant loss of the clam population and the occurrence of brown tide. It is also possible that non-bloom factors, e.g. natural population variability increased predation pressure, could have caused the population loss. The reduced populations of filter feeders could have been partially responsible for conditions conducive for the brown tide bloom. Published |
format |
Article in Journal/Newspaper |
author |
Montagna, Paul A. |
spellingShingle |
Montagna, Paul A. Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event |
author_facet |
Montagna, Paul A. |
author_sort |
Montagna, Paul A. |
title |
Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event |
title_short |
Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event |
title_full |
Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event |
title_fullStr |
Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event |
title_full_unstemmed |
Dwarf surfclam Mulinia lateralis (Say, 1822) populations and feeding during the Texas brown tide event |
title_sort |
dwarf surfclam mulinia lateralis (say, 1822) populations and feeding during the texas brown tide event |
publisher |
National Shellfisheries Association |
publishDate |
1993 |
url |
http://www.bioone.org/loi/shre https://tamucc-ir.tdl.org/handle/1969.6/87004http://www.bioone.org/loi/shre |
geographic |
Baffin Bay |
geographic_facet |
Baffin Bay |
genre |
Baffin Bay |
genre_facet |
Baffin Bay |
op_relation |
MZ9YRSSK http://www.bioone.org/loi/shre https://tamucc-ir.tdl.org/handle/1969.6/87004http://www.bioone.org/loi/shre |
_version_ |
1780731846046253056 |