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Topic: Galaxiid


In the News (Wed 15 Feb 12)

  
  Whitebait - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-12)
New Zealand whitebait are the juvenile of certain galaxiids which mature and live as adults in rivers with native forest surrounds.
The larvae of these galaxiids is swept down to the ocean where they hatch and the sprats then move back up their home rivers as whitebait.
The most common whitebait species in New Zealand is the common galaxias or inanga, which lays its eggs during spring tides in Autumn on the banks of a river amongst grasses that are flooded by the tide.
en.wikipedia.org /wiki/Whitebait   (762 words)

  
 MERG Research- Whitebait
Diadromous galaxiids are ideal models for these techniques because the individual rivers in which they originate have distinctive chemical composition, due to historical land use practices such as mining and agriculture, which is encoded within the elemental fingerprints of otoliths.
Galaxiid larvae are also relatively large (7 - 9 mm) when they enter the marine environment, and they too should be capable of maintaining a nearshore distribution.
The Galaxiids are the southern hemisphere's equivalent of salmon.
www.biol.canterbury.ac.nz /MERG/research/whitebait.html   (924 words)

  
 Recovery plan for the Pedder
Redfin perch represent a significant threat to the galaxiid populations of Lake Pedder.
Fulton (1978) demonstrated that the downstream limit of the galaxiid population coincided with a natural barrier to brown trout invasion, and postulated that the trout were responsible for the absence of galaxiids further downstream in the system.
This is unique amongst galaxiid fishes and may have implications regarding the genetic compositions of the Arthurs and Woods lakes populations.
www.ifc.tas.gov.au /galaxias.htm   (9246 words)

  
 Southern Encounter Aquarium and Kiwi House
One of the most widespread of the Galaxiid family within New Zealand, with a range from sea level to almost 1000m and 400km inland.
The whitebait from the banded kokopu are the smallest of the galaxiid family being only 40 – 45mm long.
Unusually for a galaxiid species, the adults can be found in shoals, most commonly in open and still/gently flowing water.
www.southernencounter.co.nz /animal_info/galaxiids.htm   (902 words)

  
 DIALOG Dissertation Abstracts   (Site not responding. Last check: 2007-10-12)
A large-scale study of migratory galaxiid occurrences on South Island’s West Coast indicated maximum slope encountered during upstream migrations was a good predictor of fish occurrence, and species had different slope-thresholds.
A hierarchical analysis that differentiated between abiotic barriers, migratory passage, and land use impacts on fish occurrence showed that land use impacts on the migratory passage was the major factor limiting migratory fish distributions.
This research shows that migratory galaxiids are sensitive to the configuration of landscape elements and migratory barriers, factors that can be used in predictive models to differentiate and quantify distribution limitations due to migratory passage, catchment land use, and local habitat conditions.
aslo.org /phd/dialog/200502-8.html   (325 words)

  
 Habitat related variations in fatty acids of catadromous Galaxias maculatus
The fatty acid profile of the galaxiid fish Galaxias maculatus (Salmoniformes) collected from an estuarine habitat (a river mouth), a freshwater creek and two land-locked freshwater lakes in Victoria, Australia, were investigated with a view to evaluating habitat influences on the fatty acid profile.
In all galaxiid populations, polyunsaturated fatty acids (PUFA) were the main group of fatty acids in total lipid in muscle, and accounted for more than 40 %, followed by saturates and monoenes.
The main fatty acids predominating in the liver of galaxiids from landlocked (Lake Bullen Merri) and estuarine populations were 16:0, 22:6(n-3) and 18:1(n-9), and generally reflected the corresponding pattern in muscle.
www.edpsciences.org /articles/alr/abs/1998/06/alr8245/alr8245.html   (370 words)

  
 Recovery Plan for the Pedder, Swan, Clarence, Swamp and Saddled Galaxias   (Site not responding. Last check: 2007-10-12)
The major threat facing Tasmania's threatened galaxiids is the presence of introduced fish which prey upon and/or compete with galaxiids.
The reclaimation of former habitat via the removal of introduced fish and subsequent restocking is obviously a preferable option for the recovery of the threatened galaxiids.
Further pages on the other species of threatened galaxiids will be prepared and sent to schools for inclusion in the kit as part of this recovery plan.
deh.gov.au /biodiversity/threatened/publications/recovery/tas-galaxids   (12416 words)

  
 Created and Cast Bronze
Galaxiid fountains are a range of unique outdoor drinking fountains designed for public spaces and schools.
Based in Wellington Galaxiid Fountains are designed and made in New Zealand.
Galaxiid Fountains are manufactured at Wellingtons art casting foundry Created and Cast Bronze
www.lostwax.co.nz /fountains.html   (158 words)

  
 Invertebrate Molecular Phylogeographt
The New Zealand native freshwater fish fauna is dominated by the galaxiids, several of which have a marine juvenile phase.
Through our Marsden funded project, we are asking questions about the origin of diversity in New Zealand's endemic galaxiids through the application of molecular and phylogenetic techniques on a background of biogeographic hypotheses.
Many of these galaxiid taxa may have restricted distributions, and are under threat from both introduced predators (brown trout) and habitat modification (farming).
www.otago.ac.nz /zoology/research/genetics/galaxiid.html   (447 words)

  
 Threatened Species - Swan galaxias 
The decline in populations of Swan galaxiids (Galaxias fontanus) has been attributed to predation by introduced fish such as brown trout and redfin perch.
The endemic Swan galaxiid also has a fairly restricted, natural range, only being found in the Swan and Macquarie river tributaries on Tasmania's east coast.
Loss of the brook trout could cause introduction of the more voracious brown trout which is one of the major threats to this fish's survival.
www.parks.tas.gov.au /threatened/swan.html   (379 words)

  
 Allibone & Townsend--Comparisons of galaxiid diets
Abstract The diets of several populations of four recently described species of galaxiid with allopatric distributions were examined in the Taieri River, New Zealand.
Comparisons of available prey items and prey consumed were carried out to examine whether the distributions of the galaxiid species might be influenced by food availability and preferences.
Furthermore prey availability was not considered responsible for the allopatric distribution of the four species, rather, spawning habitat availability, physical nature of the streams, and prior geological history of the Taieri catchment are considered the controlling influences on galaxiid distribution.
www.rsnz.org /publish/nzjmfr/1998/29.php   (215 words)

  
 The Press: local, national & world news from Christchurch's daily newspaper: Didymo poses new risk   (Site not responding. Last check: 2007-10-12)
The discovery of didymo in the Waitaki River is sparking fears that critically endangered species may be at risk from the smothering algal bloom.
The galaxiid, a collective name for a group of native freshwater fish, live in tributaries of the Waitaki River.
The bio-assets programme manager for coastal Otago, Dave Houston, said the longjaw galaxiid, which is of "extremely limited" numbers and distribution, can be found in two tributaries of the river.
www.stuff.co.nz /stuff/0,2106,3563930a6009,00.html   (449 words)

  
 asl newsletter v39#2 Articles
The key problem associated with the lakes is low water levels due principally to prolonged drought conditions and competition for water by various users.
Biota thought to be of particular importance to the functioning of the systems and of high conservation value, are the macroinvertebrate communities which include the endemic hydrobiid gastropod (Austropyrgus sp.) and the endemic and highly ‘restricted’ and ‘rare’ fish, golden galaxias (Galaxias auratus).
Perform population abundance and biomass estimations of the golden galaxiid in lakes Crescent and Sorell,
www.asl.org.au /aslnews/v39/aslnews_v39n2_articles.htm   (5527 words)

  
 Conservation biology of Golden galaxias 
In order to define the effect of the recent record low lake levels on this species, monitoring of recruitment during 2003 is required.
The recent work also identified the need for quantitative sampling techniques and regimes for detecting changes in the abundance of galaxiid populations particularly those that have significant conservation value (ie threatened or endangered).
A larval tow consists of towing a specially designed conical plankton net at each site for 10 min approximately 15 m behind a boat at a speed that ensures the net samples the top 1 m of the water column.
www.parks.tas.gov.au /manage/scientific_permits/research03/44-03.html   (702 words)

  
 Paragalaxias mesotes (Arthurs Paragalaxias) listing advice
The Arthurs Paragalaxias is a bullet-shaped fish with a blunt head and a long snout, and is considered to be a medium sized galaxiid species, typically growing up to 80mm in length.
Although the exact spawning habitat of Arthurs Paragalaxias is not known, other galaxiid species deposit eggs under rocks in shallow waters.
These shallow areas are often subject to drying, and given that rocky areas occur around the shore in Woods Lake, it is possible that a slight drop in water level may expose a large width of shoreline, potentially displacing fish from important breeding habitat.
www.deh.gov.au /biodiversity/threatened/species/arthurs-galaxias.html   (1501 words)

  
 Seahorse World
In this tank we have two of the five galaxiid species which constitute whitebait catches in New Zealand.
Inanga are found in gentle flowing and still waters, they are the predominant species caught in nets during the whitebait season.
Banded Kokopu are another galaxiid species that are caught during whitebait season, though not in the same high numbers as inanga.
www.seahorseworld.co.nz /layout/freshWater.php   (430 words)

  
 A Comparative Phylogeographic Approach Toward Defining Functional Units for the Conservation of Biodiversity in Lotic ...
Mitochondrial DNA data obtained from the COI region similarly revealed two highly divergent clades in populations of the Cape galaxiid G.
In conclusion, it is important to note that despite efforts to select taxonomically well resolved taxa, the results have revealed a number of discrete, highly divergent, genetic units in the Cape galaxiid G.
The monophyletic nature and degree of sequence divergence among these units reflect populations that have experienced long periods of isolation.
www4.gu.edu.au:8080 /adt-root/public/adt-QGU20031125.103610   (923 words)

  
 Galaxias fuscus. A THREAT TO TROUT FISHING?
fuscus (and some other galaxiids) occur in areas where trout are still migrating upstream and have not yet reached their upstream limit which, incidentally, is the same limit
Frankenberg, R. Studies on the evolution of galaxiid fishes with particular reference to the Australian fauna.
McDowell, R. and Frankenberg, R. The galaxiid fishes of Australia.
www.peter.unmack.net /papers/1994.gfuscus.lc.html   (640 words)

  
 EXAMINING CATCHMENTS AS FUNCTIONAL UNITS FOR THE CONSERVATION OF RIVERINE BIOTA AND MAINTENANCE OF BIODIVERSITY
This also has serious implications for both the use of catchments as management units for the conservation of some riverine organisms, and has serious implications for large-scale, long distance water transfers.
This begs further research and illustrates the fact that the Western Cape is not simply a botanical biodiversity "hotspot", but that in-stream faunas are also rich in endemics.
This has obvious implications for management as individual catchments seem to be exhibiting unique signatures in terms of their species complements and genetic structure.
www.fwr.org /wrcsa/975102.htm   (2623 words)

  
 Dr Jon Waters   (Site not responding. Last check: 2007-10-12)
Waters, J.M., Allibone, R.M. and Wallis, G.P. Geological subsidence, river capture, and cladogenesis of galaxiid fish lineages in central New Zealand.
McDowall, R.M. and Waters, J.M. Phylogenetic relationships in a small group of diminutive galaxiid fishes and the evolution of sexual dimorphism.
Waters, J.M., Lopez, J.A. and Wallis, G.P. Molecular phylogenetics and biogeography of galaxiid fishes (Osteichthyes: Galaxiidae): dispersal, vicariance and the position of Lepidogalaxias salamandroides.
www.zoology.otago.ac.nz /pubs/waters/jw.html   (794 words)

  
 CSIRO PUBLISHING - Marine & Freshwater Research
Values for galaxiid biomass were low in comparison with those for trout where both occurred together.
gairdneri and by 1974 the galaxiid species had completely disappeared below a natural barrier to trout, but above this barrier the biomass and population structure of G.
Historical data for the catchment area suggested that the introduction and subsequent success of trout are primarily responsible for the present, much fragmented galaxiid distribution.
www.publish.csiro.au /nid/126/paper/MF9760551.htm   (232 words)

  
 Cryptic Species of Mudfish in New Zealand   (Site not responding. Last check: 2007-10-12)
(1999) Genetic variation, population structure and cryptic species within the fl mudfish, Neochanna diversus, an endemic galaxiid from New Zealand.
diversus), an endemic species of galaxiid from New Zealand, is threatened by habitat modification and invasive species.
From a conservation point of view, this work has shown that these populations require management as a separate species of Galaxiidae and that the wetland habitats where they live should be protected to ensure the conservation of associated biodiversity.
swfsc.nmfs.noaa.gov /prd/PROJECTS/MEL/CG/Steve/mudfish.html   (221 words)

  
 Neoteny or not? The distribution of the hypophysial duct within the Galaxioidea   (Site not responding. Last check: 2007-10-12)
The hypophysial duct, a hollow tube of tissue linking the pituitary gland and the buccal cavity, was found in adults of all the galaxiid genera examined except Aplochiton and Paragalaxias.
The pituitary structure in these genera, however, indicated that the duct was probably once present and has been subsequently lost.
Mapping the distribution of the duct onto a DNA sequencebased phylogeny suggests that the embryological duct was retained in a galaxiid ancestral to Aplochiton, with subsequent losses in Aplochiton and Paragalaxias.
taxonomy.zoology.gla.ac.uk /~mkennedy/wosabstracts/hypophysialduct.html   (192 words)

  
 Biological Invasions: Consequences for Parasites, Pathogens, Emerging Diseases, and Fisheries in the Marine Environment.
Flexible life history strategies in a New Zealand diadromous galaxiid, giant kokopu (Galaxias argenteus)
The largest galaxiid, giant kokopu (Galaxias argenteus) is believed to exhibit an amphidromous life history, typical of many New Zealand fish.
However, the occurrence of isolated coastal populations, often associated with either coastal freshwater wetlands or estuaries, suggests diadromy may be facultative, even where access to marine habitats is continuously available.
www.asfb.org.au /pubs/2003/2003nz-42.htm   (318 words)

  
 Bioline International Official Site (site up-dated regularly)   (Site not responding. Last check: 2007-10-12)
A late Cretaceous (Maasteichtian) Galaxiid fish from South Africa
A LATE CRETACEOUS (MAASTRICHTIAN) GALAXIID FISH FROM SOUTH AFRICA
A new teleost fish, Stompooria rogersmithi, is described from deposits of a Late Cretaceous crater lake in the Karoo, South Africa.
www.bioline.org.br /abstract?id=fs98001   (63 words)

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