منابع مشابه
Charles Darwin, ichthyology and the species concept
This issue of Fish and Fisheries, devoted to the‘Species Concept in Fish’, could bene¢t, one might think, from a brief review of what Charles Darwin (1809^1882), the founder of evolutionary biology, might have to sayabout ¢shes and the species concept. Darwin, as every biologist knows,wrote numerous books on particular groups of organisms: barnacles, orchids, earthworms, but neveron ¢shes.To co...
متن کاملsurvey on the rule of the due & hindering relying on the sheikh ansaris ideas
قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
15 صفحه اولEvolutionary steps in ichthyology and new challenges*
One may postulate that man’s interest in fish emerged as soon as he was able to express his thoughts and notions as fish, among other animals, were subject of early communications. These were transmitted first by drawings, later by inscriptions and in writings. It was but much later that fishes began to occupy man’s interest as objects of science. Aristotle’s treatises on “History of Animals” i...
متن کاملThe Encyclopedia
The Embryo Project Encyclopedia is a digital publication for topics related to the sciences of developmental biology and reproductive biology [2], and for the historical, legal, ethical, and social contexts of those sciences. The encyclopedia regularly publishes descriptive articles, interpretive essays, pictures, original graphics, and other kinds of items. All items are published Open Access ...
متن کاملThe Encyclopedia
The Embryo Project Encyclopedia is a digital publication for topics related to the sciences of developmental biology and reproductive biology [2], and for the historical, legal, ethical, and social contexts of those sciences. The encyclopedia regularly publishes descriptive articles, interpretive essays, pictures, original graphics, and other kinds of items. All items are published Open Access ...
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ژورنال
عنوان ژورنال: Science
سال: 1904
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.19.486.675