Abundance, size composition and benthic assemblages of two Mediterranean echinoids off the Egyptian coasts: Paracentrotus lividus and Arbacia lixula
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چکیده
منابع مشابه
Grazing by the sea urchins Arbacia lixula L. and Paracentrotus lividus Lam. in the Northwest Mediterranean
The sea urchins Arbacia lixula and Paracentrotus lividus are common on shallow subtidal reefs in the Mediterranean. Previous studies on the ecology of these species reported that P. lividus is generally more abundant on horizontal or gently sloping substrata, where it forages mainly on erect algae. In contrast, A. lixula is more common on vertical substrata and it is considered a main grazer of...
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Arbacia lixula and Paracentrotus lividus are the dominant sea urchins in 14 the Mediterranean sublittoral, where they are key structuring species due to their 15 grazing activity. It has been commonly accepted that competition between both species 16 is minimized by specializing in different algal foods: A. lixula is considered to feed 17 mainly on encrusting coralline algae, while P. lividus p...
متن کاملa case study of the two translators of the holy quran: tahereh saffarzadeh and laleh bakhtiar
بطورکلی، کتاب های مقدسی همچون قران کریم را خوانندگان میتوان مطابق با پیش زمینه های مختلفی که درند درک کنند. محقق تلاش کرده نقش پیش زمینه اجتماعی-فرهنگی را روی ایدئولوژی های مترجمین زن و در نتیجه تاثیراتش را روی خواندن و ترجمه آیات قرآن کریم بررسی کند و ببیند که آیا تفاوت های واژگانی عمده ای میان این مترجمین وجود دارد یا نه. به این منظور، ترجمه 24 آیه از آیات قرآن کریم مورد بررسی مقایسه ای قرار ...
15 صفحه اولa comparative analysis of the marginal microleakages of two pit and fissure sealans, conseal-f and conseal clear
چکیده ندارد.
15 صفحه اولReproductive biology of Paracentrotus lividus (Echinodermata: Echinoidea) in two contrasting habitats of northernTunisia (south-east Mediterranean)
The reproductive strategies of the sea urchin, Paracentrotus lividus, was studied in the Bay of Tunis. Samples were collected monthly, from September 1993 to August 1995, in two sites which differ in their marine vegetation and their exposure to wave action. Histological examination demonstrated a cycle of gametogenesis with six reproductive stages and a main breeding period occurring between A...
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ژورنال
عنوان ژورنال: The Egyptian Journal of Aquatic Research
سال: 2015
ISSN: 1687-4285
DOI: 10.1016/j.ejar.2015.11.010