Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution
A low-density, intertidal population of the barnacle Balanus amphitrite was studied close to a sewage outfall near Quequen, Argentina. Barnacles were individually followed during 3 consecutive years. Growth rates observed in the present study (orifice length 4.9-5.1 mm at the end of the first year)...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02780372_v17_n3_p417_Calcagno |
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todo:paper_02780372_v17_n3_p417_Calcagno2023-10-03T15:16:50Z Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution Calcagno, J.A. López Gappa, J. Tablado, A. Amphitrite Balanus amphitrite Balanus amphitrite Thoracica A low-density, intertidal population of the barnacle Balanus amphitrite was studied close to a sewage outfall near Quequen, Argentina. Barnacles were individually followed during 3 consecutive years. Growth rates observed in the present study (orifice length 4.9-5.1 mm at the end of the first year) were remarkably lower than values previously reported for this species. A Von Bertalanffy growth equation was fitted to length-age data (K = 0.4-0.5, L∞ = 8.5-8.8, T0 = -0.5 to -0.7). Growth and production were higher in summer/autumn than in winter/spring. The production/biomass ratio fluctuated between 0.3 and 0.4 for the whole population, but was highest (1.8-1.9) during the first year of benthic life. Based on analysis of length-frequency distributions and following the fate of marked specimens, we verified the coexistence of 5 annual cohorts and therefore a maximal longevity of more than 5 years. Possible causes of this extended life history of B. amphitrite in the study area are discussed. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02780372_v17_n3_p417_Calcagno |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Amphitrite Balanus amphitrite Balanus amphitrite Thoracica |
| spellingShingle |
Amphitrite Balanus amphitrite Balanus amphitrite Thoracica Calcagno, J.A. López Gappa, J. Tablado, A. Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution |
| topic_facet |
Amphitrite Balanus amphitrite Balanus amphitrite Thoracica |
| description |
A low-density, intertidal population of the barnacle Balanus amphitrite was studied close to a sewage outfall near Quequen, Argentina. Barnacles were individually followed during 3 consecutive years. Growth rates observed in the present study (orifice length 4.9-5.1 mm at the end of the first year) were remarkably lower than values previously reported for this species. A Von Bertalanffy growth equation was fitted to length-age data (K = 0.4-0.5, L∞ = 8.5-8.8, T0 = -0.5 to -0.7). Growth and production were higher in summer/autumn than in winter/spring. The production/biomass ratio fluctuated between 0.3 and 0.4 for the whole population, but was highest (1.8-1.9) during the first year of benthic life. Based on analysis of length-frequency distributions and following the fate of marked specimens, we verified the coexistence of 5 annual cohorts and therefore a maximal longevity of more than 5 years. Possible causes of this extended life history of B. amphitrite in the study area are discussed. |
| format |
JOUR |
| author |
Calcagno, J.A. López Gappa, J. Tablado, A. |
| author_facet |
Calcagno, J.A. López Gappa, J. Tablado, A. |
| author_sort |
Calcagno, J.A. |
| title |
Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution |
| title_short |
Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution |
| title_full |
Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution |
| title_fullStr |
Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution |
| title_full_unstemmed |
Growth and production of the barnacle Balanus amphitrite in an intertidal area affected by sewage pollution |
| title_sort |
growth and production of the barnacle balanus amphitrite in an intertidal area affected by sewage pollution |
| url |
http://hdl.handle.net/20.500.12110/paper_02780372_v17_n3_p417_Calcagno |
| work_keys_str_mv |
AT calcagnoja growthandproductionofthebarnaclebalanusamphitriteinanintertidalareaaffectedbysewagepollution AT lopezgappaj growthandproductionofthebarnaclebalanusamphitriteinanintertidalareaaffectedbysewagepollution AT tabladoa growthandproductionofthebarnaclebalanusamphitriteinanintertidalareaaffectedbysewagepollution |
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