scholarly journals In situ observations of trophic behaviour and locomotion of Princaxelia amphipods (Crustacea: Pardaliscidae) at hadal depths in four West Pacific Trenches

2011 ◽  
Vol 92 (1) ◽  
pp. 143-150 ◽  
Author(s):  
Alan J. Jamieson ◽  
Anne-Nina Lörz ◽  
Toyonobu Fujii ◽  
Imants G. Priede
Keyword(s):  
Pacific Ocean ◽  
Japan Trench ◽  
Predatory Behaviour ◽  
The Pacific ◽  
Close Range ◽  
Burst Swimming ◽  
The Pacific Ocean ◽  
In Situ Observations ◽  
Made In

The genus Princaxelia, Pardaliscidae, is a rarely recorded, infrequently collected and hitherto observed benthic amphipod, typically found at hadal depths (>6000 m) in the Pacific Ocean trenches. Little is known about the behaviour or physiology of this genus. Using a baited camera lander, observations of Princaxelia jamiesoni were made in the Japan Trench (7703 m) and Izu–Ogasawara Trench (9316 m) and of Princaxelia aff. abyssalis in the Kermadec Trench (7966 m) and Tonga Trench (8798 m). These amphipods rapidly intercepted the bait and preyed upon smaller lysianassoid amphipods. Mean absolute swimming speeds for P. jamiesoni and P. aff. abyssalis were 4.16 cm.s−1 ± 1.8 SD and 4.02 cm.s−1 ± 0.87 SD respectively. These amphipods have the capacity for long range swimming, high manoeuvrability in close range, and efficient predatory behaviour. Burst swimming speeds for P. aff. abyssalis were 9 and 10 cm.s−1 with accelerations up to 22–25 cm.s−2.

The rare deep-living hyperiid amphipod Megalanceoloides remipes (Barnard, 1932): complementary description and symbiosis

Zootaxa ◽  
2016 ◽  
Vol 4178 (1) ◽  
pp. 138 ◽  
Author(s):  
REBECA GASCA ◽  
STEVEN H.D. HADDOCK
Keyword(s):  
Pacific Ocean ◽  
Indian Ocean ◽  
Gulf Of California ◽  
South Atlantic ◽  
Symbiotic Association ◽  
The Pacific ◽  
The Indian Ocean ◽  
The Pacific Ocean ◽  
In Situ Observations

A female ovigerous specimen of the rare deep-living hyperiid Megalanceoloides remipes (Barnard, 1932) was collected with a remotely operated submersible (ROV) at a depth of 2,094 m in the Farallon Basin, Gulf of California. The specimen was found to be symbiotically associated with the siphonophore Apolemia sp. Eschscholtz, 1829. Hitherto, this species was known only from two other specimens, one from the South Atlantic and another from the Indian Ocean; the present record is the first from the Pacific Ocean. Previous descriptions lacked morphological details of different appendages; these data are provided here. In addition, we present the first data on its symbiotic association from in situ observations. The colors of the hyperiid and of some parts of the Apolemid were very similar, thus supporting the notion that some hyperiids tend to mimic the color of its host. 

A Royal Society appointment with Venus in 1769: the voyage of Cook and Banks in the Endeavour In 1768-1771 and its botanical results

1969 ◽  
Vol 24 (1) ◽  
pp. 64-90 ◽  
Keyword(s):  
Pacific Ocean ◽  
Royal Society ◽  
The Sun ◽  
Royal Navy ◽  
The Earth ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Set Up ◽  
George Iii ◽  
Made In

A little over two hundred years ago a number of serious and learned men in Copenhagen, London, Paris, St Petersbourg, Stockholm and elsewhere, men who were academicians, Fellows of the Royal Society, Lords of the Admiralty, politicians and the like, had been thinking seriously and learnedly about the behaviour of Venus, not, of course, about Venus as represented coldly and chastely by the marble statues being imported from Italy or more warmly in the paintings of Boucher and his contemporaries, but about her far distant planet which was calculated to pass across the disk of the Sun in 1769 and not to make another such transit until 1874. Observations of the 1769 transit at widely separated stations would provide, it was hoped, the means of calculating the distance of the Earth from the Sun. The Royal Society in London, having set up in November 1767 a sub-committee ‘to consider the places proper to observe the coming Transit of Venus’ and other particulars relevant to the same, presented a memorial to King George III outlining possible benefits to science and navigation from observations made in the Pacific Ocean and received in return the promise of £4000 and a suitable ship provided by the Royal Navy (8).

scholarly journals Impact of Data Assimilation on ECCO2 Equatorial Undercurrent and North Equatorial Countercurrent in the Pacific Ocean

2015 ◽  
Vol 32 (1) ◽  
pp. 131-143 ◽  
Author(s):  
David Halpern ◽  
Dimitris Menemenlis ◽  
Xiaochun Wang
Keyword(s):  
Pacific Ocean ◽  
Data Assimilation ◽  
Velocity Measurements ◽  
Equatorial Undercurrent ◽  
Substantial Impact ◽  
The Pacific ◽  
The Pacific Ocean ◽  
The Difference ◽  
The Impact

AbstractThe impact of data assimilation on the transports of eastward-flowing Equatorial Undercurrent (EUC) and North Equatorial Countercurrent (NECC) in the Pacific Ocean from 145°E to 95°W during 2004–05 and 2009–11 was assessed. Two Estimating the Circulation and Climate of the Ocean, Phase II (ECCO2), solutions were analyzed: one with data assimilation and one without. Assimilated data included satellite observations of sea surface temperature and ocean surface topography, in which the sampling patterns were approximately uniform over the 5 years, and in situ measurements of subsurface salinity and temperature profiles, in which the sampling patterns varied considerably in space and time throughout the 5 years. Velocity measurements were not assimilated. The impact of data assimilation was considered significant when the difference between the transports computed with and without data assimilation was greater than 5.5 × 106 m3 s−1 (or 5.5 Sv; 1 Sv ≡ 106 m3 s−1) for the EUC and greater than 5.0 Sv for the NECC. In addition, the difference of annual-mean transports computed from 3-day-averaged data was statistically significant at the 95% level. The impact of data assimilation ranged from no impact to very substantial impact when data assimilation increased the EUC transport and decreased the NECC transport. The study’s EUC results had some correspondence with other studies and no simple agreement or disagreement pattern emerged among all studies of the impact of data assimilation. No comparable study of the impact of data assimilation on the NECC has been made.

H.M.S. Challenger's Investigations in the Pacific Ocean

1952 ◽  
Vol 5 (3) ◽  
pp. 251-261 ◽  
Author(s):  
G. S. Ritchie
Keyword(s):  
Pacific Ocean ◽  
Marine Life ◽  
Physical Data ◽  
The Pacific ◽  
Starting Point ◽  
The Pacific Ocean ◽  
Made In

H.M.S. Challenger is one of Her Majesty's surveying vessels. She is a ship of 1140 tons and carries a complement of 96 officers and men. Built in 1931, she is named after her illustrious predecessor in which the wellknown world oceanographic cruise was made in the years 1872–6. This expedition brought back a great wealth of chemical and physical data, and a huge collection of plants and animals from the oceans. These were checked and analysed and eventually, under the guidance of Sir John Murray, who had been a scientist on board, the results were published in fifty folio volumes known as the Challenger Reports. These reports still form, the starting point for the study of the oceans and marine life.

scholarly journals In situ calcium carbonate dissolution in the Pacific Ocean

2002 ◽  
Vol 16 (4) ◽  
pp. 91-1-91-12 ◽  
Author(s):  
R. A. Feely ◽  
C. L. Sabine ◽  
K. Lee ◽  
F. J. Millero ◽  
M. F. Lamb ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Pacific Ocean ◽  
Carbonate Dissolution ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Calcium Carbonate Dissolution

scholarly journals A Rare Northern Pacific Item

1927 ◽  
Vol 1 (6) ◽  
pp. 6-7
Keyword(s):  
Pacific Ocean ◽  
Lake Superior ◽  
Puget Sound ◽  
Public Library ◽  
Partial Report ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Northern Pacific ◽  
Made In

A Northern Pacific item of great rarity and value will be added to the Library files when the business collection of the Boston Public Library comes into the keeping of the Business Library. This pamphlet, a “Partial report… of a reconnoissance made in the summer of 1869, between Lake Superior and the Pacific Ocean, by Thos. Hawley Canfield, general agent of the company, accompanied with notes on Puget Sound by Samuel Wilkeson, Esq., the historian of the expedition,” recently changed hands for $150 at an auction.

scholarly journals I. The Bakerian Lecture.—Researches on the tides. Thirteenth series. On the tides of the Pacific, and on the diurnal inequality

1848 ◽  
Vol 138 ◽  
pp. 1-29 ◽  
Keyword(s):  
Pacific Ocean ◽  
Royal Society ◽  
First Approximation ◽  
General Manner ◽  
The Pacific ◽  
The Pacific Ocean ◽  
The Subject ◽  
The Common ◽  
Made In

1. In 1833 the Royal Society did me the honour to publish, in its Transactions, a memoir of mine, entitled “Essay towards a First Approximation to a Map of Cotidal Lines;" and, in subsequent years, a number of further communications on the sub­ject of our knowledge of the tides, as deduced from observations of those phenomena. These later “Researches” have modified my first views,—a result which I from the first contemplated as probable, as I intended to imply by entitling my memoir “An Essay towards a First Approximation,” and as I expressed more fully in the memoir itself. I have also obtained from various persons, since my last communication to the Society, a considerable amount of recent tide observations, made in various quarters of the globe; and I am desirous of pointing out the general bearing of these addi­tional materials of knowledge. I wish especially to bring under the consideration both of mathematicians and of navigators, the problem of the tides of the Pacific Ocean. When I wrote my first memoir on the subject, our knowledge of the tides of that ocean was so imperfect, that I did not even venture upon a first approxima­tion to the cotidal lines. And I have since seen reason to believe that, not only for that ocean but for all large seas, the method of drawing cotidal lines which I formerly adopted, is very precarious. 2. There is another leading feature of the tides, which has been brought clearly into view in the course of these researches, which is of great interest and importance to the navigator, as well as to the mathematician, and of which I have assigned the laws in a general manner, and with an accuracy sufficient for most practical pur­poses; I mean the Diurnal Inequality which makes the common or semidiurnal tides differ alternately in excess and in defect. I have already examined various series of tide observations in which this diurnal inequality prominently appears; but I have now the means of showing it to be much more extensively distributed and larger in amount than has been supposed.

scholarly journals Liparid and macrourid fishes of the hadal zone: in situ observations of activity and feeding behaviour

2008 ◽  
Vol 276 (1659) ◽  
pp. 1037-1045 ◽  
Author(s):  
A.J Jamieson ◽  
T Fujii ◽  
M Solan ◽  
A.K Matsumoto ◽  
P.M Bagley ◽  
...  
Keyword(s):  
Feeding Behaviour ◽  
Beat Frequency ◽  
Japan Trench ◽  
Activity Levels ◽  
Top Predators ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Tail Beat ◽  
Hadal Zone

Using baited camera landers, the first images of living fishes were recorded in the hadal zone (6000–11 000 m) in the Pacific Ocean. The widespread abyssal macrourid Coryphaenoides yaquinae was observed at a new depth record of approximately 7000 m in the Japan Trench. Two endemic species of liparid were observed at similar depths: Pseudoliparis amblystomopsis in the Japan Trench and Notoliparis kermadecensis in the Kermadec Trench. From these observations, we have documented swimming and feeding behaviour of these species and derived the first estimates of hadal fish abundance. The liparids intercepted bait within 100–200 min but were observed to preferentially feed on scavenging amphipods. Notoliparis kermadecensis act as top predators in the hadal food web, exhibiting up to nine suction-feeding events per minute. Both species showed distinctive swimming gaits: P. amblystomopsis (mean length 22.5 cm) displayed a mean tail-beat frequency of 0.47 Hz and mean caudal : pectoral frequency ratio of 0.76, whereas N. kermadecensis (mean length 31.5 cm) displayed respective values of 1.04 and 2.08 Hz. Despite living at extreme depths, these endemic liparids exhibit similar activity levels compared with shallow-water liparids.

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