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Topic: Hydroid growth

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	SCI. MAR., 60 (1): 89-97 SCIENTIA MARINA 1996 ADVANCES IN HYDROZOAN BIOLOGY, S. PIRAINO, F. BOERO, J. BOUILLON, P.F.S. ...
		Approximately 27 hydroid species were found in a tide pool in the intertidal zone, and 42 on the subtidal rocky shelf including the infralittoral fringe west and north of the island.
		The qualitative and quantitative abundance of hydroids and relatively few algae in the pool may be influenced by this "shade " effect, because the pool is shaded during emersion by the leaves of the surfgrass which form a canopy on its surface.
		Calder,D.R. 1991 b.Vertical zonation of the hydroid Dynamena crisioides (Hydrozoa, Sertulaiiiidae) in a mangrove ecosystem at Twin Cays,.Belize.
	www.racerocks.com /racerock/hydroid/pub/seasonal.htm (3507 words)

	Shellfish Culture Component
		Growth over the 10-month deployment was 41 mm, with a mean growth rate of approximately 1 mm/week, and mussels reached minimum market size of 50 mm in March 2000; approximately eight months after deployment.
		Growth rates of the first two seed deployments were similar, and averaged approximately 1 mm/week.
		Interestingly, the fouling by hydroids was much heavier on the lower density socks (similar to the headline and seed lines shown in Figure 11), indicating that higher mussel density and resulting higher filtration capacity can greatly influence fouling.
	www.ooa.unh.edu /shellfish/report (2847 words)

	New Jersey Scuba Diver - Marine Biology - Plant-like Animals
		In Jellyfishes, the egg-laying mobile medusa stage is dominant, and the polyp stage is greatly reduced in importance and often difficult to identify.
		Masses of hydroids adorn many of the offshore wrecks, mixed in with anemones, sponges, mussels, coral, and algae.
		Hydroids are the most primitive Cnidarians, closely related to Hydromedusae, and display the most even split between the sessile polyp stages and free-swimming medusa stages, which are quite small and common.
	www.njscuba.net /biology/sw_plant-like.html (1892 words)

	Entwicklungsbiologie der Tiere
		Expression of a Hox gene, Cnox-2, and the division of labor in a colonial hydroid.
		The influence of the epizoic hydroid Hydractinia echinata on the recruitment of the Antarctic scallop Adamussium colbecki.
		The marine bacterium Alteromonas espejiana induces metamorphosis of the hydroid Hydractinia echinata.
	www.uni-kl.de /FB-Biologie/AG-Leitz/Literatur/literatur.htm (4011 words)

	[No title]
		We subsequently showed that the hydroids were capable of consuming cod larvae and young copepods; in the latter case having a potentially devastating effect on their prey (Madin et al., In Press; Session II).
		There was a clear effect of food on the growth of hydroid colonies, with the mean number of hydranths per colony diverging between the food and no food treatments after approximately 4 days (Figure 1A).
		Perhaps more interesting, however, was the additional effect on hydroid growth due to mixing (Figure 1A).
	globec.whoi.edu /globec-dir/reports/siworkshop.1995/session4.html (2044 words)

	TOC (Site not responding. Last check: 2007-10-30)
		The index of sub-lethal effect was the inhibition of asexual growth of the hydroid colonies.
		Growth control has been perceived as homeostasis, or the regulation of state, rather than as a process controlled by its rate, which is correctly termed homeorhesis (Waddington, 1977).
		It appears that traditional methods of growth analysis, based as they are on the analysis of raw cumulative data, tend to obscure rather than reveal evidence of the behavior of growth as a process.
	www.belleonline.com /newsletters/volume6/vol6-2.html (4294 words)

	A Geometro-mechanical Model for Pulsatile Morphogenesis (Site not responding. Last check: 2007-10-30)
		A model is proposed which imitates the morphogenesis of several species of the lower invertebrate animals, the hydroid polyps and permits the derivation of the geometry (surface curvature) of each developmental stage from that of the preceding stage.
		Hydroid buds start their development from very simple geometrical shapes which become complicated later on in a quite monotonous manner, by changing nothing more than their local curvatures.
		Due to a constant secretion and a subsequent hardening of the perisarc, the configuration of a hydroid branch taken along its whole length is a precise imprint (a trace) of the path travelled during an entire growth period by a constant group of apical cells.
	nature.ok.ru /models/Biomechanics.htm (6271 words)

	The Hydra Library: I-M
		Ignat'eva, E. [Apical growth of the bud in Hydra].
		Transforming growth factor-beta activated during exercise in brain depresses spontaneous motor activity of animals.
		Lenhoff, H. Influence of monovalent cations on the growth of Hydra littoralis.
	www.biology.pomona.edu /martinez/I-M.html (14170 words)

	Abscisic Acid Signaling through Cyclic ADP-ribose in Hydroid Regeneration -- Puce et al. 279 (38): 39783 -- Journal of ...
		Small hydroid fragments (10 mm each) were cut from different colonies, randomized, and incubated in SW in Petri dishes at 17° C under artificial light (8 h/day) or in the dark.
		After 4 days, the regenerated tissue protruding from the ends of the fragments was cut, and cyclase and hydrolase activities were determined as described under "Experimental Procedures" on lysates prepared from the regenerating part (extremities) and from the central section (center) of the fragments.
		Small fragments (10 mm each) cut from different hydroid colonies and randomized were incubated in Petri dishes (10 pieces per dish) in SW at 17 °C under artificial light (8 h/day) in the absence (control) or in the presence of ABA.
	www.jbc.org /cgi/content/full/279/38/39783 (3942 words)

	[No title] (Site not responding. Last check: 2007-10-30)
		This experiment sought to determine morphological and growth changes with varying salinity for two populations of the colonial hydroid, Cordylophora.
		Freshwater hydroids from the Des Plaines River in Illinois (salinity 0ppt), and brackish water hydroids from Exeter, New Hampshire (salinity 10ppt) were utilized.
		To measure growth and morphological changes, numbers of feeding and reproductive polyps, and buds were recorded as well as the length of tentacles, and length and width of polyps.
	www.umesc.usgs.gov /mrrc/abstracts/2001/01nies.txt (404 words)

	Hydrozoans. In: Marine Biodiversity - An Introduction. Author: Peter Dyrynda (Site not responding. Last check: 2007-10-30)
		Colonies are supported by a rigid exoskeleton, the form of which is important in the elucidation of most hydroid species.
		Hydroids are a diverse group in both temperate and tropical waters.
		The by-the-wind sailor is a colonial hydroid that has adapted to life on the ocean wave.
	www.solaster-mb.org /mb/hydrozoa.htm (584 words)

	[No title]
		This projection is on par with the level of growth experienced in 2003, as the global economy was recovering from a steep, but short-lived, recession, but is conservative when comparing it to the record 2.5 mb/d -- or 3.2% -- projected for 2004.
		This sequence of gains contrasts with the milder growth pattern of 1998 to 2002, roughly the period from the Asian financial crisis to the global economic downturn of 2000-2001 and its aftershock.
		Demand growth in the late 1990s and early 2000s was slowed, first and foremost, by adverse economic conditions, be it on a regional scale during the Asian financial crisis or, more recently, at a more global level.
	www.marinelink.com /Story/ShowStory.aspx?StoryID=14910 (1138 words)

	Self/non-self Discrimination in Basal Metazoa: Genetics of Allorecognition in the Hydroid Hydractinia -- Cadavid 45 ...
		Hydroid allorecognition regulates competition at both the level of the colony and at the level of the cell lineage.
		Crowell, S. Individual specificity in the fusion of hydroid stolons and the relationship between stolonic growth and colony growth.
		The ontogeny of allorecognition in a colonial hydroid and the fate of early established chimeras.
	icb.oxfordjournals.org /cgi/content/full/45/4/623 (3833 words)

	[No title] (Site not responding. Last check: 2007-10-30)
		Colony growth was studied in hydroid Gonothyraea loveni, a suitable object for investigation of the vital processes regulation in the organism.
		In parallel, the following structural reorganizations were registered: changes in stolon and shoots growth rate, their branching, resorbsion of the hydranths and there repeated formation.
		Analyses of thr growth regulation mechanisms shows that the effect of the organism integrity is achieved mainly in consequence of the ordered spatial "ruled" differentiation of colony vital functions, but not due to the centralized growth and morphogenetic processes administration.
	herba.msu.ru /russian/journals/job/resume_html/job.1-99.06.html (222 words)

	Hydroid Press Releases
		Commenting on the recent contract, Hydroid’s Kevin McCarthy stated, “we are very excited by this contract and look forward to delivering the systems, and to supporting the Singapore Navy in their upcoming operations.
		Hydroid plans to deliver the systems later this summer, and will conduct extensive operational and maintenance training in Singapore in the fall.
		Hydroid Inc. holds the exclusive license from the Woods Hole Oceanographic Institution for the manufacture and further development of the REMUS Autonomous Underwater Vehicle (AUV) technology.
	www.hydroidinc.com /pr_0704_singapore.html (237 words)

	SPONGE-?HYDROID PALEOECOLOGIC RELATIONSHIPS IN SILURIAN MICROBIAL REEFS (Site not responding. Last check: 2007-10-30)
		Sphinctozoan (aphrosalpingid) sponges from Alaska and Russia inhabited high-energy microbial reefs that were built along the Uralian Seaway in the Late Silurian.
		Three species of sphinctozoans encrusted microbial laminae, cavity surfaces, and a variety of organic substrates, including the problematic hydroid Fistulella; possible stromatoporoids (recrystallized); crinoids; the possible cyanobacterium Ludlovia; corals; and unidentifiable shelly debris.
		The intimate growth relationships shared by these and other biotas yields new insights into the fossil record of encrusting sponges, identifies a novel sponge-?hydroid association, and reveals the complex ecology that evolved in mid-Paleozoic microbial reefs.
	gsa.confex.com /gsa/2003AM/finalprogram/abstract_58645.htm (357 words)

	Inter Research » MEPS » v302 » p37-48
		ABSTRACT: It is generally considered that colonial invertebrates living on the surfaces of macroalgae have a negative influence on the growth rates and survivorship of their substratum.
		We investigated the influence of colonial bryozoans and hydrozoans on the growth rate and nitrogen physiology of their substratum, the giant kelp Macrocystis pyrifera, and the impact of seasonal changes of light and the seawater nitrogen concentration on this relationship.
		Evidence suggests that enhanced growth was caused by the provision of ammonium excreted by the hydroid colonies.
	www.int-res.com /abstracts/meps/v302/p37-48 (334 words)

	Brazilian Archives of Biology and Technology - Morphometric patterns of two fouling Eudendrium spp. (Hydrozoa, ... (Site not responding. Last check: 2007-10-30)
		According to Gili and Hughes (1995), "hydroid size is commonly inversely correlated with water movement": within the same species, large specimens are usually found on calm and smaller specimens on agitated waters (see also Mergner, 1972, 1977, 1987; da Silveira and Migotto, 1991).
		Bandel, K.; Wedler, E. Hydroid, amphineuran and gastropod zonation in the littoral of the Caribbean Sea, Colombia.
		5108, as "Hydroids and Hydromedusae of the USSR", 1-631 (1969).
	www.scielo.br /scielo.php?script=sci_arttext&pid=S1516-89132000000500012 (2424 words)

	Georges Bank GLOBEC Hydroids (Site not responding. Last check: 2007-10-30)
		Laboratory studies indicated that the hydroids were capable of consuming cod larvae and young copepods; in the latter case at rates comparable to 50% to over 100% of the daily production in the central region of the Bank.
		Additional laboratory investigations on the feeding, growth and life history characteristics of planktonic hydroids indicate an important role for mixing in addition to food availability.
		This species of hydroid seems to be peculiarly adapted to thrive in the plankton.
	userwww.sfsu.edu /~bioocean/research/smbhydroids/smbhydroids.html (316 words)

	Jassa falcata (Site not responding. Last check: 2007-10-30)
		The male and the female live in different tubes.
		Jassa falcata feeds generally on hydroid growth on the bottom of rafts and ships.
		It's generally a suspension feeder normally found on sediment areas.
	bopedia.com /en/wikipedia/j/ja/jassa_falcata.html (128 words)

	Dr.Anita Brinckmann-Voss
		Anita has established long term research plots in a tidepool at the reserve and documents the distribution of hydroids underwater with the assistance of students and faculty in the Diving program at Lester B. Pearson College.
		A new species of colonial athecate hydroid, Rhysia fletcheri,is described from Vancouver Island, British Columbia, Canada, and from Friday Harbour, Washington, U.S.A. It's relationship to Rhysia autumnalis Brinckmann from the Mediterranean and Rhysia halecii (Hickson and Gravely) from the Antarctic and Japan is discussed.
		An assemblage of 27 hydroid species was reported from a tide pool in the lower rocky intertidal zone, and
	www.racerocks.com /racerock/hydroid/anitabv.htm (492 words)

	[No title] (Site not responding. Last check: 2007-10-30)
		Furthermore, Cordylophora colonies often foul the zebra mussels, exhibiting rapid growth of dense colonies on the mussel shells.
		Mussel growth was limited during the initial seven weeks of the experiment due to unfavorable water quality conditions.
		Zebra mussels not fouled by Cordylophora did show a lower rate of mortality and a higher rate of recovery and growth than those fouled by the hydroid, however this difference was not statistically significant at the ?=0.05 level due to the large degree of variation among the mussel sub-samples of several aquaria.
	www.umesc.usgs.gov /mrrc/abstracts/2001/01polk.txt (518 words)

	Fitness Consequences of Allorecognition-Mediated Agonistic Interactions in the Colonial Hydroid Hydractinia [GM] -- ...
		Roman numerals I–V were assigned to colonies according to the extent of stolonal proliferation for ease of interpretation.
		of growth, survival of 4-mm colonies dropped to 55% and was
		Yamaguchi, M. Growth and reproductive cycles of the marine fouling ascidians Ciona intestinalis, Styela plicata, Botrylloides violaceous, and Leptoclinum mitsukurii at Aburatsubo-Moroiso Inlet (central Japan).
	www.biolbull.org /cgi/content/full/206/3/173 (6066 words)

	WHOI : Coastal Ocean Institute : An Offshore Mussel Aquaculture Experiment (Site not responding. Last check: 2007-10-30)
		At that time the spat collector mooring ropes, covered with over six inches of mostly hydroid growth, were retrieved and added to the longline.
		By the end of summer 1999, the mussels had grown considerably and were outcompeting the hydroid growth.
		Objectives of the installation would include correlation of the bioproductivity of the water and mussel attachment and growth, studying seasonal and multi-year variation of the grow-out, and better understanding of mechanical wear and durability of all mooring components.
	www.whoi.edu /institutes/coi/viewArticle.do?id=7301 (1415 words)

	Wheaton College (Wheaton, IL) - Biology
		- Ecology, taxonomy and physiological adaptability of the colonial hydroid, Cordylophora spp.
		The Effects of Salinity on the Growth and Morphology of the Colonial Hydroid, Cordylophora spp IN PREP: Journal of Experimental Zoology.
		Feeding and Growth of the nudibranch Cuthona nana (Alder and Hancock, 1842).
	www.wheaton.edu /Biology/faculty/folinororem.html (272 words)

	OZ REEF - 1998 June: Algae Growth Without Herbivores
		This demonstrates well the fact that herbivores keep apparent algae growth down to a low level, but it is still there.
		For example, of 13 species of hydroids - corals without skeletons found on the seamounts, nine appear to be new to science.
		The dense coral matrix provides the perfect platform for other filter feeders, such as hydroids and sponges, several species of solitary stony corals, and various bamboo, gold and fl corals, some of which grow to several metres in height and more than 100 years old.
	ozreef.org /journal/1998_june:_algae_growth_without_herbivores.html (4472 words)

	FSC (Field Studies Council) - Bringing Environmental Understanding to All
		The latter is the dispersal and sexual phase whilst the first is the growth and asexual phase.
		As the hydroid colony grows so some of the polyps produce a medusa - a minute jellyfish which swims off and produces sperm and eggs.
		The resulting larvae hatching from the fertile egg, lands on the shore and, stimulated by a positive response to light, it establishes a new colony of polyps.
	www.theseashore.org.uk /theseashore/SpeciesPages/Hydroids.html (291 words)

	Recent Publications
		Acclimation and growth response of the green sea urchin Strongylocentrotus droebachiensis to fluctuating salinity.
		Are natural growth lines in the skeletal structures of echinoids reliable indicators of age?
		Field estimates of growth and mortality of the green sea urchin, Strongylocentrotus droebachiensis.
	www86.homepage.villanova.edu /michael.russell/recent_publications.htm (301 words)

	[No title] (Site not responding. Last check: 2007-10-30)
		Cell migration in ectoderm of stolons (and at less degree - in the shoots) during the growth of intact colonies of hydroid Gonothyraea loveni (Allm.) was studied by means of video-taping and vital staining.
		There are at least two main types of cell migration during colony growth: a) individual cell migration; b)entire tissue layer migration.
		The cells that migrate individually are nematoblasts (or nematocytes) and the morular cells with granulated cytoplasm.
	herba.msu.ru /russian/journals/job/resume_html/job.1-99.07.html (390 words)

	Polyps
		A colorectal polyp is a growth that projects (usually on a stalk) from the lining of the colon or rectum.
		Colon polyps are a fleshy growth on the inside (the lining) of the colon.
		colon polyps are fleshy growths that occur on the inside (the lining) of known as the colon.
	www.themesotheliomalawyers.com /cancerarticles/info/Polyps (654 words)

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