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| Autores principales: | , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
1990
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| Materias: | |
| Acceso en línea: | https://doi.org/10.1594/PANGAEA.760003 |
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| _version_ | 1867167665748967424 |
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| author | Drits, Alexander V Pasternak, Anna F Semenova, Tatyana N Flint, Mikhail V |
| author_facet | Drits, Alexander V Pasternak, Anna F Semenova, Tatyana N Flint, Mikhail V |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Feeding patterns of mass herbivorous copepods in upwelling areas are investigated. Daily rations and aspects of their formation are examined in Calanoides carinatus (Benguela upwelling), Calanus pacificus (off the California coast), and Calanus australis (Peru upwelling). Rations were calculated based on gut plant pigment contents obtained at daily stations using laser spectrofluorometry, experimental data on the rate of gut evacuation and data on the carbon/chlorophyll ratio in phytoplankton and particulate matter at the respective stations. When phytoplankton was abundant, diel feeding rhythms were not pronounced and gut pigment level was high during the entire 24-h period. When phytoplankton biomass was low, distinct feeding rhythms were pronounced with a nocturnal maximum. During active upwelling intensive feeding on phytoplankton supports energy (respiration) and plastic (growth, development, reproduction, accumulation of reserves) metabolism of copepods. When upwelling was inactive, the surface part of the population feeds less actively and is able only partially to cover its energy expenditures. The actively growing and reproducing populations of C. pacificus and C. carinatus may consume close to 20% of primary production, whereas the inactive population of C. australis consumed only 0.2% of primary production when upwelling weakened. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_760003 |
| institution | PANGAEA |
| language | en |
| publishDate | 1990 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Feeding parameters of copepods from upwelling areas Drits, Alexander V Pasternak, Anna F Semenova, Tatyana N Flint, Mikhail V AK43-4948B; Archive of Ocean Data; ARCOD; DM38-3480; DM38-3519; DM38-3529; East Atlantic; East Pacific; MULT; Multiple investigations; Pacific Ocean Feeding patterns of mass herbivorous copepods in upwelling areas are investigated. Daily rations and aspects of their formation are examined in Calanoides carinatus (Benguela upwelling), Calanus pacificus (off the California coast), and Calanus australis (Peru upwelling). Rations were calculated based on gut plant pigment contents obtained at daily stations using laser spectrofluorometry, experimental data on the rate of gut evacuation and data on the carbon/chlorophyll ratio in phytoplankton and particulate matter at the respective stations. When phytoplankton was abundant, diel feeding rhythms were not pronounced and gut pigment level was high during the entire 24-h period. When phytoplankton biomass was low, distinct feeding rhythms were pronounced with a nocturnal maximum. During active upwelling intensive feeding on phytoplankton supports energy (respiration) and plastic (growth, development, reproduction, accumulation of reserves) metabolism of copepods. When upwelling was inactive, the surface part of the population feeds less actively and is able only partially to cover its energy expenditures. The actively growing and reproducing populations of C. pacificus and C. carinatus may consume close to 20% of primary production, whereas the inactive population of C. australis consumed only 0.2% of primary production when upwelling weakened. |
| title | Feeding parameters of copepods from upwelling areas |
| topic | AK43-4948B; Archive of Ocean Data; ARCOD; DM38-3480; DM38-3519; DM38-3529; East Atlantic; East Pacific; MULT; Multiple investigations; Pacific Ocean |
| url | https://doi.org/10.1594/PANGAEA.760003 |