oestrus cycle
oestrus cycle (estrus cycle) In female mammals (other than most
Primates, compare
MENSTRUAL CYCLE) the hormonally controlled, regularly repeated stages by which the body is prepared for reproduction. In anoestrus the female reproductive apparatus is inactive; in pro-oestrus it becomes active; and in oestrus
ovulation usually occurs (in some species ovulation is triggered by copulation) and the female becomes receptive to males. Unless fertilization occurs, oestrus gives way to anoestrus as the cycle repeats.
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Ross's gulls (Rhodostethia rosea) breeding in Greenland: a review, with special emphasis on records from 1979 to 2007.(Report)
Magazine article from: Arctic; 9/1/2008; ; 700+ words
; ...Arctic explorers and naturalists, Ross's gull (Rhodostethia rosea) since...species has notably improved, a Ross's gull sighting is still one of...prized among modern birdwatchers. Sir James Clark Ross first described the species from...
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Second breeding site for Ross's gull (Rhodostethia rosea) in Nunavut, Canada.
Magazine article from: Arctic; 9/1/2000; ; 700+ words
; ...reproduction. Mots cles: mouette de Ross, Rhodostethia rosea, nidification...Nunavut INTRODUCTION Although a Ross's gull (Rhodostethia rosea) was...described from two specimens shot by Sir James Clark Ross in June 1823 on the east coast of...
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Chocolate and tripe de roche: emergency provisions left behind by the first expedition to search for Sir John Franklin's missing party in the Canadian Arctic.(FROM THE COLLECTION)
Magazine article from: Geographical; 6/1/2007; 700+ words
; When Arctic explorer Sir John Franklin and his crew...Renowned Arctic explorer Sir James Clark Ross was the first man to set...somewhat ironic twist, as Ross had been the initial choice...into the food. Although Ross's expedition failed to...
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Sir Francis Leopold McClintock (1819-1907) a Royal Navy officer and polar explorer, Francis McClintock discovered the fate of the missing Franklin Expedition and charted large areas of the Arctic.(Late Great Geographers #50)
Magazine article from: Geographical; 12/1/2004; ; 700+ words
; ...in the search for the Franklin Expedition. In 1845, Sir John Franklin had disappeared while seeking the Northwest...Three years later, McClintock joined the expedition of Sir James Clark Ross to search the area around North Somerset Island. Over...
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In the footsteps of forgotten pioneer
Newspaper article from: The Scotsman; 7/2/2004; ; 700+ words
; MORE than 150 years ago, Sir John Ross set off from his home on the shores...blazed by Sir John, his nephew Sir James Clark Ross and 21 crew. Lt Hankey, 36, the great-great-great-nephew of Sir James and the great-great-great...
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Explorers' ship discovered in the Arctic.(Worldwatch)(Brief Article)
Magazine article from: Geographical; 12/1/2004; ; 638 words
; ...become the, first to retrace the route taken by Sir John Ross and his nephew Sir James Clark Ross during their unsuccessful search for the Northwest...made famous for charting Boothia and for Sir James's discovery of the position of the north magnetic...
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Scientists seek global warming clues from dead explorers' notes
Newspaper article from: Scotland on Sunday; 3/2/2003; ; 685 words
; ...released for use by climate scientists across the world were noted Scottish arctic explorer Sir John Ross and his nephew Sir James Clark Ross. Sir James, who died in 1862, discovered the magnetic North Pole in 1831 after first accompanying his...
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 "The Birmingham Post (England)")
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Archive: On this day.(Features)
Newspaper article from: The Birmingham Post (England); 6/1/2002; 429 words
; 1831: The magnetic North Pole was located by Sir James Clark Ross: Already during the 16th century, mariners were certain...stayed there for four years. Sir John's nephew, James Clark Ross, went on to explore the area reaching the North...
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Polar history shows melting ice-cap may be a natural cycle SHRINKING COULD STOP SOON
Newspaper article from: The Scotsman; 3/9/2005; ; 700+ words
; ...hundreds of mariners whose records were examined by Dr Dick were the noted Scottish arctic explorer Sir John Ross and his nephew Sir James Clark Ross. Sir James discovered the magnetic North Pole in 1831 after earlier accompanying his uncle to the Arctic...
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INTREPID EXPLORERS
Newspaper article from: The Scotsman; 9/18/2001; 519 words
; ...000-mile journey in exile. Uncle and nephew Sir John Ross and Sir James Clark Ross were both leading Arctic explorers at the beginning...with Greenock-born Henry Bowers. John Muir, Sir James Hector and Robert Brown, Sir Thomas Macdougall...
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Sir James Clark Ross
Encyclopedia entry from: Encyclopedia of World Biography
Sir James Clark Ross The English admiral and polar explorer Sir James Clark Ross (1800-1862) is known for his discovery of the North magnetic...
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Ross, Sir James Clark
Book article from: The Oxford Companion to British History
Ross, Sir James Clark (1800–62). Ross was involved in eight Arctic and Antarctic expeditions after...Those of 1818 and 1829–33 were with his uncle John Ross , those of 1819–20, 1821–3, and 1824...
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Ross, James Clark
Dictionary entry from: Complete Dictionary of Scientific Biography
ROSS, JAMES CLARK ( b . London, England, 15...navigation, geomagnetism . Ross, the third son of George Ross...Ross accompanied his uncle, Sir John Ross, on the private...Sailing in a small vessel, James Ross carried out the sledging...
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Ross Sea
Book article from: The Columbia Encyclopedia, Sixth Edition
Ross Sea arm of the Pacific Ocean, Antarctica , between Victoria Land and Marie Byrd Land. It was discovered in 1841 by Sir James Clark Ross, a British explorer. Ross Island with Mt. Erebus, an active volcano, is in the western...
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Sir Francis Leopold McClintock
Encyclopedia entry from: Encyclopedia of World Biography
Sir Francis Leopold McClintock Sir Francis Leopold McClintock (1819-1907) was a British admiral...later, in 1848, McClintock became second lieutenant under Sir James Clark Ross on the Enterprise. Their task was to make an Arctic voyage...
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