The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms

Manuel, J. L. ; Pearce, C. M. ; Manning, D. A. ; O'Dor, R. K.
Springer
Published 2000
ISSN:
1432-1793
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract We examined the vertical distributions of scallop (Placopecten magellanicus) veligers in deep (0.6 m diameter, 9.5 m deep) polyethylene mesocosms from December 1991 to January 1992. In the mesocosms temperature stratification varied from 0 to 1.5 °C. Profiles of vertical distribution revealed several repeated patterns. Peaks in veliger numbers often appeared at the water surface and just above the thermocline. Higher density patches were seen below the surface peaks, and revealed the presence of bio-convective cells. Distribution away from these discontinuities was usually even. Distribution of veligers was affected by thermoclines above 1.0 °C. Responses to thermoclines varied with larval age and time of day, and 28 to 30 d veligers passed in both directions through a 1.5 °C thermocline. We conclude that larval behaviour is a major determinant of whether veligers pass through a thermocline. Kinematic viscosity may play a role in perception of temperature changes. Two potential consequences of such behaviour are (1) remaining in more productive upper water layers, where feeding opportunities are enhanced, and (2) increased horizontal transport in the region of the thermocline, which may enhance recruitment.
Type of Medium:
Electronic Resource
URL:
_version_ 1798295749516066816
autor Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
autorsonst Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
book_url http://dx.doi.org/10.1007/s002270000328
datenlieferant nat_lic_papers
hauptsatz hsatz_simple
identnr NLM20238165X
issn 1432-1793
journal_name Marine biology
materialart 1
notes Abstract We examined the vertical distributions of scallop (Placopecten magellanicus) veligers in deep (0.6 m diameter, 9.5 m deep) polyethylene mesocosms from December 1991 to January 1992. In the mesocosms temperature stratification varied from 0 to 1.5 °C. Profiles of vertical distribution revealed several repeated patterns. Peaks in veliger numbers often appeared at the water surface and just above the thermocline. Higher density patches were seen below the surface peaks, and revealed the presence of bio-convective cells. Distribution away from these discontinuities was usually even. Distribution of veligers was affected by thermoclines above 1.0 °C. Responses to thermoclines varied with larval age and time of day, and 28 to 30 d veligers passed in both directions through a 1.5 °C thermocline. We conclude that larval behaviour is a major determinant of whether veligers pass through a thermocline. Kinematic viscosity may play a role in perception of temperature changes. Two potential consequences of such behaviour are (1) remaining in more productive upper water layers, where feeding opportunities are enhanced, and (2) increased horizontal transport in the region of the thermocline, which may enhance recruitment.
package_name Springer
publikationsjahr_anzeige 2000
publikationsjahr_facette 2000
publikationsjahr_intervall 7999:2000-2004
publikationsjahr_sort 2000
publisher Springer
reference 137 (2000), S. 169-175
search_space articles
shingle_author_1 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
shingle_author_2 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
shingle_author_3 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
shingle_author_4 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
shingle_catch_all_1 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
Abstract We examined the vertical distributions of scallop (Placopecten magellanicus) veligers in deep (0.6 m diameter, 9.5 m deep) polyethylene mesocosms from December 1991 to January 1992. In the mesocosms temperature stratification varied from 0 to 1.5 °C. Profiles of vertical distribution revealed several repeated patterns. Peaks in veliger numbers often appeared at the water surface and just above the thermocline. Higher density patches were seen below the surface peaks, and revealed the presence of bio-convective cells. Distribution away from these discontinuities was usually even. Distribution of veligers was affected by thermoclines above 1.0 °C. Responses to thermoclines varied with larval age and time of day, and 28 to 30 d veligers passed in both directions through a 1.5 °C thermocline. We conclude that larval behaviour is a major determinant of whether veligers pass through a thermocline. Kinematic viscosity may play a role in perception of temperature changes. Two potential consequences of such behaviour are (1) remaining in more productive upper water layers, where feeding opportunities are enhanced, and (2) increased horizontal transport in the region of the thermocline, which may enhance recruitment.
1432-1793
14321793
Springer
shingle_catch_all_2 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
Abstract We examined the vertical distributions of scallop (Placopecten magellanicus) veligers in deep (0.6 m diameter, 9.5 m deep) polyethylene mesocosms from December 1991 to January 1992. In the mesocosms temperature stratification varied from 0 to 1.5 °C. Profiles of vertical distribution revealed several repeated patterns. Peaks in veliger numbers often appeared at the water surface and just above the thermocline. Higher density patches were seen below the surface peaks, and revealed the presence of bio-convective cells. Distribution away from these discontinuities was usually even. Distribution of veligers was affected by thermoclines above 1.0 °C. Responses to thermoclines varied with larval age and time of day, and 28 to 30 d veligers passed in both directions through a 1.5 °C thermocline. We conclude that larval behaviour is a major determinant of whether veligers pass through a thermocline. Kinematic viscosity may play a role in perception of temperature changes. Two potential consequences of such behaviour are (1) remaining in more productive upper water layers, where feeding opportunities are enhanced, and (2) increased horizontal transport in the region of the thermocline, which may enhance recruitment.
1432-1793
14321793
Springer
shingle_catch_all_3 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
Abstract We examined the vertical distributions of scallop (Placopecten magellanicus) veligers in deep (0.6 m diameter, 9.5 m deep) polyethylene mesocosms from December 1991 to January 1992. In the mesocosms temperature stratification varied from 0 to 1.5 °C. Profiles of vertical distribution revealed several repeated patterns. Peaks in veliger numbers often appeared at the water surface and just above the thermocline. Higher density patches were seen below the surface peaks, and revealed the presence of bio-convective cells. Distribution away from these discontinuities was usually even. Distribution of veligers was affected by thermoclines above 1.0 °C. Responses to thermoclines varied with larval age and time of day, and 28 to 30 d veligers passed in both directions through a 1.5 °C thermocline. We conclude that larval behaviour is a major determinant of whether veligers pass through a thermocline. Kinematic viscosity may play a role in perception of temperature changes. Two potential consequences of such behaviour are (1) remaining in more productive upper water layers, where feeding opportunities are enhanced, and (2) increased horizontal transport in the region of the thermocline, which may enhance recruitment.
1432-1793
14321793
Springer
shingle_catch_all_4 Manuel, J. L.
Pearce, C. M.
Manning, D. A.
O'Dor, R. K.
The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
Abstract We examined the vertical distributions of scallop (Placopecten magellanicus) veligers in deep (0.6 m diameter, 9.5 m deep) polyethylene mesocosms from December 1991 to January 1992. In the mesocosms temperature stratification varied from 0 to 1.5 °C. Profiles of vertical distribution revealed several repeated patterns. Peaks in veliger numbers often appeared at the water surface and just above the thermocline. Higher density patches were seen below the surface peaks, and revealed the presence of bio-convective cells. Distribution away from these discontinuities was usually even. Distribution of veligers was affected by thermoclines above 1.0 °C. Responses to thermoclines varied with larval age and time of day, and 28 to 30 d veligers passed in both directions through a 1.5 °C thermocline. We conclude that larval behaviour is a major determinant of whether veligers pass through a thermocline. Kinematic viscosity may play a role in perception of temperature changes. Two potential consequences of such behaviour are (1) remaining in more productive upper water layers, where feeding opportunities are enhanced, and (2) increased horizontal transport in the region of the thermocline, which may enhance recruitment.
1432-1793
14321793
Springer
shingle_title_1 The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
shingle_title_2 The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
shingle_title_3 The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
shingle_title_4 The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
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source_archive Springer Online Journal Archives 1860-2000
timestamp 2024-05-06T09:41:09.397Z
titel The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
titel_suche The response of sea scallop (Placopecten magellanicus) veligers to a weak thermocline in 9-m deep mesocosms
topic W
uid nat_lic_papers_NLM20238165X