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Topic: Thysanopoda

	YourArt.com >> Encyclopedia >> krill (Site not responding. Last check: 2007-10-11)
		The largest krill species is the mesopelagic Thysanopoda spinicauda.{{mnbrin53Brin53}} Krill can be easily distinguished from other crustaceans such as true shrimps by their externally visible gills.
		Many krill are filter feeders: their front-most extremities, the thoracopods, form very fine combs with which they can filter out their food from the water.
		There are two types of spawning mechanisms.{{mngomez2aGom02a}} The 57 species of the genera Bentheuphausia, Euphausia, Meganyctiphanes, Thysanoessa, and Thysanopoda are "broadcast spawners": the female eventually just releases the fertilized eggs into the water, where they usually sink into deeper waters, disperse, and are on their own.
	www.yourart.com /research/encyclopedia.cgi?subject=/krill (3444 words)

	Krill - Wikipedia, the free encyclopedia
		The largest krill species is the mesopelagic Thysanopoda spinicauda.
		The 57 species of the genera Bentheuphausia, Euphausia, Meganyctiphanes, Thysanoessa, and Thysanopoda are "broadcast spawners": the female eventually just releases the fertilized eggs into the water, where they usually sink into deeper waters, disperse, and are on their own.
		Brinton, E.: Thysanopoda spinicauda, a new bathypelagic giant euphausiid crustacean, with comparative notes on T. cornuta and T. egregia.
	en.wikipedia.org /wiki/Krill (3462 words)

	Euphausiids
		Euphausiids are eucarid crustaceans, popularly known as krill, and are divided in two families, The Bentheuphausiidae containing the single genus and species Bentheuphausia amblyops, and the Euphausiidae containing all other species.
		There are 86 known species (including recently described Thysanopoda minyops and the reinstated Stylocheron armatus).
		Although this is a much smaller number than in most other crustaceans orders, the euphausiids probably constitute the most important component of the oceanic planktonic biomass because their relatively large size compared with other zooplankton and the great abundance of many of their species.
	www.geocities.com /jgomez64/euphausiids.html (239 words)

	Megamouth Shark
		Seems to prefer shrimp (Thysanopoda pectinata) and follows its daily migration with a depth range from 300m down to about 1100m during daytime hours and a nocturnal depth of 150m to about 500m.
		Compared to the Basking sharks (Cetorhinus maximus),another plankton feeder, this species is able to actively suck in water,like the whale shark (Rhiniodon typus).
		Feeds on shrimp, Thysanopoda pectinata, and other forms of plankton.
	www.worldshark.com /species/megamouth/megamouth.html (213 words)

	Dissertationsdatenbank (Site not responding. Last check: 2007-10-11)
		We measured gut passage time (GPT) of three common migrant species at the Bermuda Atlantic Time-series (BATS) site, using the gut fluorescence method, to determine whether GPT is slow enough to allow active export of POC to depth.
		Mean GPT for the copepods Pleuromamma xiphias and Euchirella messinensis was 191 min and 114 min, respectively, and for the euphausiid Thysanopoda aequalis 41min, exceeding previously reported GPT for non-migrating animals by a factor of 6.
		Between 23 and 79 % of the initial gut pigment was retained in animal guts upon descent below the mixed layer of 150 m.
	www.cybersdorf.com /dissdb/rn035635 (403 words)

	FIGIS - FAO/SIDP Species Identification Sheet: Megachasma pelagios (Site not responding. Last check: 2007-10-11)
		The only known prey of the megamouth shark are epipelagic and mesopelagic euphausiid shrimp, copepods, and jellyfish.
		The first megamouth shark from Hawaii had been feeding on an euphausiid shrimp, Thysanopoda pectinata, that averages 3.1 cm in length.
		The shrimp has a diel migration pattern with a range of 300 to 1 100 m depth during the day; at night it is commonest at 150 to 500m with a maximum range of 75 to 525 m.
	www.fao.org /figis/servlet/species?fid=13392 (1952 words)

	Mar-Eco - Krill on the MAR (Site not responding. Last check: 2007-10-11)
		Krill (Euphausiacea) are typical and abundant members of macrozooplankton but their abundance and distribution remain poorly known even in the Atlantic Ocean.
		Figur 3: Population size frequency distribution of Thysanopoda cornuta.
		Eleven species were identified, some typical, like Meganyctiphanes norvegica and Thysanopoda acutifrons, and some rare, like Thysanopoda egregia and T cornuta.
	www.mar-eco.no /activities/research/Studentprofiles/Tom_Letessier (393 words)

	CSIRO PUBLISHING - Marine & Freshwater Research (Site not responding. Last check: 2007-10-11)
		Changes in vertical distribution and abundance of warm-water species invading the ring environs suggest that only a few species, such as Stylocheiron carinatum, are able to penetrate and take advantage of the changing ring conditions in young- to middle-aged rings (2-8 months).
		Other near-surface warm-water species penetrate at slower rates regardless of whether they are vertical migrators (Euphausia brevis, E. hemigibba, E. tenera, Thysanopoda aequalis) or non-migrators (S.
		Distribution of the latter two species indicates dispersal out beyond the ring core at the surface in the case of E.
	www.publish.csiro.au /nid/126/paper/MF9830625.htm (257 words)

	[SNC] Euphausiid reproduction rate
		There are 86 species of euphausiids in the oceans, of which 57 are believed to shed their eggs freely into the sea; the remaining 29 species protect their embryos by attachment to the posterior pairs of thoracic legs (Mauchline and Fisher, 1969).
		Euphausiids of the genera Bentheuphausia, Euphausia, Thysanoessa, Meganyctiphanes, and Thysanopoda spawn freely and hatch as nauplius 1, while the genera Nematoscelis, Nyctiphanes, Pseudeuphausia, and Stylocheiron brood their eggs and hatch in the early metanauplius phase as pseudometanauplii or as metanauplii (Mauchline and Fisher, 1969; Brinton et al., 2000).
		Jaime Gomez-Gutierrez's continues: I'm studying two species of euphausiids and brood size change from upwelling conditions (low temperature, high turbulence environment) to non-upwelling or offshore conditions with higher temperature.
	www.rain.org /pipermail/sanctuary-naturalist-corps/2002-August/000839.html (496 words)

	EXPERIMENTAL EVIDENCE FOR LUMINESCENT COUNTERSHADING BY SOME EUPHAUSIID CRUSTACEANS (Site not responding. Last check: 2007-10-11)
		Furthermore, the bioluminescence stimulated by either photoflash or chemicals is too bright for camouflage.
		Using techniques designed to study luminescent camouflage behavior in mesopelagic shrimp, bioluminescence produced in response to dim downward directed light (490-500 nm) was measured for four species of euphausiids: Thysanopoda orientalis (mesopelagic), Nematoscelis difficilis, Euphausia gibboides, and Euphausia eximia (all epipelagic).
		All specimens were collected and maintained in dark conditions prior to testing.
	aslo.org /meetings/santafe99/abstracts/SS16TH1326S.html (204 words)

	os22r in os00
		What has not been previously measured is active transport of particulate organic carbon (POC) by feeding in the surface at night and releasing fecal pellets at depth during the day.
		The euphausiid {\it Thysanopoda aequalis} has a shorter mean passage time of 1 hour.
		Reported migration swimming speeds for these species indicate gut passage times are sufficiently long to allow transport of fecal material out of the mixed layer.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=os00&database=/data/epubs/wais/indexes/os00/os00&maxhits=200&="OS22R" (3989 words)

	Krill - Biocrawler (Site not responding. Last check: 2007-10-11)
		Krill can have multiple broods in one season.
		The 57 species of the genera Bentheuphausia, Euphausia, Meganyctiphanes, Thysanoessa, and Thysanopoda are "broadcast spawners": the female eventually just releases the eggs into the water, where they float freely, disperse, and are on their own.
		These species generally hatch in the nauplius 1 stage
	www.biocrawler.com /encyclopedia/Krill (2046 words)

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