Data/hora: 07/06/2024 04:40:50

Provedor de dados: | 13
País: | Ukraine

Título:

Species-specific differences in diatom-induced anomalies in calanoid copepod embryogenesis: are they linked to the stock-piled antioxidants?

Видоспецифические различия индуцированных диатомовыми аномалий эмбриогенеза каланоидных копепод: связаны ли они с запасными антиоксидантами?

Видоспецифічні розходження індукованих діатомовими аномалій ембріогенезу каланоїдних копепод: чи зв'язані вони із запасними антиоксидантами?

Autores: | Khanaychenko, A. N.
Data: | 2007-07-04
Ano: | 2004
Palavras-chave: | Calanoid copepods; Diatom; Embryo; Anomaly; Extracellular matrix; Pigment; Каланоидные копеподы; Диатомовые; Эмбрион; Аномалии; Экстраклеточный матрикс; Пигмент Diatoms Embryos Pigments Pigments Diatoms http://aims.fao.org/aos/agrovoc/c_5875 http://aims.fao.org/aos/agrovoc/c_32657.
Resumo: | Egg production and viability of co-occurring in nature copepods, Calanus helgolandicus and Calanoides carinatus, fed diatom, Thalassiosira rotula, and then switched to dinoflagellate Prorocentrum minimum, were compared in experimental conditions. Egg production of both species on diatom diet was similar (up to 17-22 eggs.female-1.d-1) but no viable nauplii were observed. Development was arrested at different stages depending on degree of anomalies. Abnormal embryos displayed various degrees of deteriorations in pigment distribution and organization of extracellular matrix. Reproductive responses of C.carinatus both to negative (diatom) and positive (dinoflagellate) diets were postponed in comparison with quick responses of C.helgolandicus. After 3 days of dinoflagellate diet C.carinatus still produced only abnormal embryos with strong residual effect of diatom diet, while C.helgolandicus produced 50 % of viable nauplii. Based on own and literature data, our hypothesis links degree of diatom-induced copepod embryonic anomalies to the disturbances in antioxidant properties of the membranes and the degree of lipid peroxidation in embryo membranes and cytoplasm attributed to imbalanced content and ratio of HUFAs and carotenoids from freshly assimilated diet. Species-specific differences in copepod reproductive responses to diatom feeding are supposedly related to different stock-piled material and pathways of these essential components to the late oocytes.
Tipo: | Journal Contribution
Idioma: | Inglês

Identificador:

Morskyji ehkologichnyji zhurnal/Marine ecological journal/Morskoj ehkologicheskij zhurnal, 3(3). p. 11-27

1684-1557

http://repository.ibss.org.ua/dspace/handle/99011/92

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