Ovaries of the white worm ( Enchytraeus albidus , Annelida, Clitellata) are composed of 16-celled meroistic germ-line cysts
نویسندگان
چکیده
منابع مشابه
new food diet formulation for rearing and propagation in white worm (enchytraeus albidus henle, 1837)
in this study, 4 different food diets were examined for feeding white worm which were studied. results showed that suitable moisture for growth and development of white worm was 50 - 70 % that their biomass reached to a 675 g/m2 during 90 days. but it decreased significantly at moisture lower than 45 % and upper than 65 %. white worm had similar growth both in acidic and basic area. white worm ...
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Glacier ice worms, Mesenchytraeus solifugus and related species, are the largest glacially obligate metazoans. As one component of cold temperature adaptation, ice worms maintain atypically high energy levels in an apparent mechanism to offset cold temperature-induced lethargy and death. To explore this observation at a mechanistic level, we considered the putative contribution of 5' adenosine ...
متن کاملEffect of repeated freeze-thaw cycles on geographically different populations of the freeze-tolerant worm Enchytraeus albidus (Oligochaeta).
Freeze-tolerant organisms survive internal ice formation; however, the adaptations to repeated freeze-thaw cycles are often not well investigated. Here we report how three geographically different populations of Enchytraeus albidus (Germany, Iceland and Svalbard) respond to three temperature treatments - constant thawed (0°C), constant freezing (-5°C) and fluctuating temperature (0 to -5°C) - o...
متن کاملThe effects of okadaic acid on Enchytraeus crypticus (Annelida: Oligochaeta)
We describe the morpho-functional effects of different concentrations of okadaic acid (OA) on specimens of Enchytraeus crypticus. The results demonstrate that this experimental model is very sensitive to the treatment and presents timeand dose-related effects mainly involving an immune response associated with a reaction in the chloragogenous tissue. At the lower dose (100 nM), the main organs ...
متن کاملNEW PHREODRILIDAE (ANNELIDA: CliTELLATA) FROM TASMANIAN ESTUARIES
A new species of Phreodrilidae from Macquarie Harbour, Tasmania is described. Astacopsidrilus ostiensis sp. nov. is unique in possessing the combination of long, tightly folded atria, modified spermarhecal chaetae and ventral chaetae that are almost simple pointed. These are the first phreodrilids to be recorded from estuarine or intertidal habitats, other than two species collected from beache...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 2017
ISSN: 0012-1606
DOI: 10.1016/j.ydbio.2017.04.009