A comparative study of the inhibitory effect of diatoms on the reproductive biology of the copepod Temora stylifera
| Autor: | Antonio Miralto, Adrianna Ianora, S. A. Poulet |
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| Rok vydání: | 1995 |
| Předmět: |
0106 biological sciences
Ecology biology Hatching 010604 marine biology & hydrobiology fungi Dinoflagellate Zoology Chaetoceros Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Isochrysis galbana Diatom embryonic structures Phaeodactylum tricornutum Flagellate Ecology Evolution Behavior and Systematics Copepod |
| Zdroj: | Marine Biology. 121:533-539 |
| ISSN: | 1432-1793 0025-3162 |
| DOI: | 10.1007/bf00349463 |
| Popis: | Egg production and viability in the copepod Temora stylifera (collected in the Bay of Naples, Italy in 1992) were strongly dependent on food type. A flagellate (Isochrysis galbana) diet induced the production of good quality eggs that developed to hatching. By contrast, two diatoms (Chaetoceros curvisetum, Phaeodactylum tricornutum) resulted in poor egg quality, with hatching success as low as 20% of total egg production. With the third diatom tested, Skeletonema costatum, females produced eggs for only 3 to 4 d, after which time they either became sterile or died. These results are discussed in relation to previous findings regarding the impact of the dinoflagellate Prorocentrum minimum and the diatom Thalassiosira rotula on the hatching success of T. stylifera eggs. Low egg viability was possibly not due to an absence of remating or a deficiency of some specific essential nutrient required for egg development but to the presence of inhibitory compounds blocking cell division during early copepod embryogenesis. This questions the traditional view that diatoms are an important food item regulating copepod secondary production. |
| Databáze: | OpenAIRE |
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