Evolution of fish The Devonian period is traditionally known as the “Age of Fish”, marking the diversification of numerous extinct and modern major fish groups. The early types resembled their cartilaginous ancestors in many features of their anatomy, including a shark-like tailfin, spiral gut, large pectoral fins stiffened in front by skeletal elements and a largely unossified axial skeleton. With the exception of a pair of spiracles , the gills did not open singly to the exterior as they do in sharks; rather, they were encased in a gill chamber stiffened by membrane bones and covered by a bony operculum , with a single opening to the exterior. The cleithrum bone , forming the posterior margin of the gill chamber, also functioned as anchoring for the pectoral fins. The cartilaginous fishes do not have such an anchoring for the pectoral fins. This allowed for a movable joint at the base of the fins in the early bony fishes, and would later function in a weight bearing structure in tetrapods. As part of the overall armour of rhomboid cosmin scales , the skull had a full cover of dermal bone , constituting a skull roof over the otherwise shark-like cartilaginous inner cranium. Importantly, they also had a pair of ventral paired lungs ,  a feature lacking in sharks and rays. In its primitive form, the air bladder was open to the alimentary canal , a condition called physostome and still found in many fish.
Age of Fishes Museum
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Strategic research NERC’s strategic research is designed to address major scientific questions that are important for the UK’s prosperity and wellbeing in the 21st century – many of them revolving around how we can manage environmental change, make the best use of scarce resources and build resilience to natural hazards.
As well as directing funds into important areas of fundamental science, it also supports training and helps to build strong research communities by bringing together academics from different disciplines with potential users of their science. Discovery science responsive mode Research that is driven by curiosity rather than by a strategic agenda can have enormous benefits far beyond the advancement of knowledge, and often they are least expected.
We don’t know which projects will eventually make a major impact on our society and economy, but we know some will. NERC is fully committed to supporting this kind of science. Innovation funding NERC doesn’t only fund science; it also helps turn that science into action, connecting researchers with those who can put their knowledge and skills to use, whether in industry, government or the third sector. Our knowledge exchange KE schemes provide an array of ways to support this flow of ideas and expertise.
They are tailored to suit different situations, from co-designing and co-delivering research specific to our partners’ needs to helping researchers commercialise their work. Postgraduate training We nurture the next generation of researchers so that the UK can continue producing world-leading environmental science into the future. Our studentships and training grants are designed to do just that, and to prepare their recipients for careers in academia and beyond.
Studentships and training grants are also made available under NERC research programmes.
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Posted on November 21, by Scott Alexander I. Jonah got swallowed by a whale. But the Bible says Jonah got swallowed by a big fish.
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God said it would be Cyrus who would give such a command that would not only include the rebuilding of the temple but the city as well Isaiah In his first year of rule over Babylon, Cyrus permitted all of the captive Israelites, who wished to do so, to return to their homeland, but it was not mandatory for all to return. It is particularly important to understand two verses Daniel The reason that the books of Ezra and Nehemiah must take place in the reigns of these four particular kings is, first, that Cyrus is mentioned by name in both the Bible Isaiah It is only reasonable that the next three kings would follow in succession, otherwise Daniel Secondly, the reason we cannot stray from the natural succession of these four kings is that the timeframe of both the books of Ezra and Nehemiah is fixed within the first three generations.
This is noted in Nehemiah 12 in the lists of the generations of the priests. Jeshua is the name of the chief of all the priests who returned in the first party of Israelites with Zerubbabel Ezra 2: Jeshua, the chief of all the priests, led the returning remnant to rebuild the altar of God and began again the evening and morning sacrifices Ezra 3: The generation of chief priests who worked with Jeshua is found in Nehemiah These same priests in verses continue to the end of the Ezra-Nehemiah record which Scripture plainly points out: During this short time the Temple was rebuilt and the walls of the city of Jerusalem were finished through some very troublesome times.
There was trouble from without and betrayal from within, but God was faithful and assured the fulfillment of his word, which he spoke through Daniel.
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Freshwater Fishes of Iran
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Systematics Kottelat and Freyhof considered that the taxon in the southern Caspian Sea basin was not Cobitis taenia Linnaeus, as long used. Cobitis taenia satunini Gladkov, has been considered the subspecies or species of some southern Caspian Sea basin Cobitis, distinguished by a truncate snout rather than gradually tapering to the tip as in European spined loaches as well as other characters listed by Gladkov including head depth comprising However, it was described from western Transcaucasia, outside the Caspian Sea basin, and material from the Caspian coast of Iran has not been examined and compared with it in detail.
Berg referred specimens from the upper Kura River basin to this subspecies but lacked material from the lower Kura, Lenkoran and the southern Caspian Sea coast. The holotype of Cobitis taenia satunini described from “Kavkaz” and “nizov’ya r. The holotype of Cobitis keyvani is a female, The species is named for Prof. Amin Keyvan , Iranian ichthyologist. Key characters This species is distinguished from the C.
Morphology Some specimens are elongate while others are deeper bodied. Dorsal fin unbranched rays , branched rays , anal fin unbranched rays , branched rays , usually 5, pectoral fin branched rays , usually , pelvic fin branched rays , usually 6, caudal fin branched rays , usually 14, gill rakers , and total vertebrae Meristics for Iranian specimens: The type description gives and later flank spots.
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Posted on November 21, by Scott Alexander I. Jonah got swallowed by a whale. But the Bible says Jonah got swallowed by a big fish. So the Bible seems to think whales are just big fish. Therefore the Bible is fallible. Therefore, the Bible was not written by God. For all we know, Jonah was swallowed by a really really really big herring. The second problem is that if the ancient Hebrews want to call whales a kind of fish, let them call whales a kind of fish.
Suppose you travel back in time to ancient Israel and try to explain to King Solomon that whales are a kind of mammal and not a kind of fish. So you try again and say that a whale is a behemah, not a dag. You try to explain that no, Solomon is wrong, dag are actually defined not by their swimming-in-sea-with-fins-ness, but by their genes. Who died and made you an expert on Biblical Hebrew?
You try to explain that whales actually have tiny little hairs, too small to even see, just as cows and sheep and pigs have hair.
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Get in to take a step back. Living tale of nature. The Belum Temenggor forest reserve forms the last and largest contiguous block of natural forest in Peninsular Malaysia. It covers an area of over , hectares. It is located in the Malaysian state of Perak and crosses into Southern Thailand. In the heart of the forest lies a lake: It covers 15, Hectares, with hundreds of tiny islands. In addition, the forest is home to a vast number of species of animals and plants.
Many of them cannot be found anywhere else on Earth. It includes three species of Rafflesia, the iconic giant flower. It is also the natural habitat of unique species of ferns and mosses.