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Journal articles on the topic 'Galaxias 'southern''

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Published: 4 June 2021

Last updated: 19 February 2022

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1

Kaulfuss, Uwe, Daphne E. Lee, Jeffrey H. Robinson, Graham P. Wallis, and Werner W. Schwarzhans. "A Review of Galaxias (Galaxiidae) Fossils from the Southern Hemisphere." Diversity 12, no. 5 (May 25, 2020): 208. http://dx.doi.org/10.3390/d12050208.

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The Galaxiidae is a Southern Hemisphere family of freshwater fish, considered to be of Gondwanan origin based on the current distribution of species in New Zealand, Australia (including Tasmania), New Caledonia, Africa, South America, and on some associated and subantarctic islands. The fossil record of galaxiids is extremely sparse and geographically restricted. The only galaxiid fossils currently known come from several Miocene lakes in southern New Zealand. They include more than 100 articulated fishes, some remarkably preserving soft parts such as eyes and skin, skulls and jaw components, and more than 200 isolated otoliths. Common coprolites and in situ preserved gut content at one site (Foulden Maar) indicate the different diets of larvae and adult fish. These discoveries reveal a diverse Galaxias fauna, the presence of lake-locked populations, ontogenetic diet shifts, and representatives of several non-migratory Galaxias lineages associated with inland streams and lakes. There are at least six Galaxias species based on macrofossils and six separate otolith-based species from varied volcanic and regional lacustrine environments. This diversity points to southern New Zealand as a centre of biodiversity and speciation in Galaxiidae in the early to late Miocene.

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2

Zama, Akira. "Some biological observations on the galaxiid fish,Galaxias platei, collected in southern Chile." Japanese Journal of Ichthyology 32, no. 4 (December 1986): 450–53. http://dx.doi.org/10.1007/bf02905426.

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3

Victoriano, P. F., C. P. Muñoz-Ramírez, C. B. Canales-Aguirre, A. Jara, I. Vera-Escalona, T. Burgos-Careaga, C. Muñoz-Mendoza, and E. M. Habit. "Contrasting evolutionary responses in two co-distributed species of Galaxias (Pisces, Galaxiidae) in a river from the glaciated range in Southern Chile." Royal Society Open Science 7, no. 7 (July 2020): 200632. http://dx.doi.org/10.1098/rsos.200632.

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Life-history traits are among the most important factors affecting population abundance and genetic diversity of species. Here, we analysed the genetic patterns of two Galaxias species with different life-history traits to investigate how these biological differences impacted their evolution in the Valdivia River basin, Southern Chile. We analysed mitochondrial DNA (mtDNA) sequences from 225 individuals of Galaxias maculatus and 136 of G. platei to compare patterns of genetic diversity, structure and demographic growth across the basin. Galaxias maculatus presented higher genetic diversity and higher genetic structure than G. platei . Demographic analyses showed G. maculatus kept a higher population size over time, with a signal of demographic expansion in the last 250 kyr. Whereas Galaxias platei , exhibited lower, but constant population size over time. Furthermore, haplotype networks revealed higher lineage diversity in G. maculatus with a tendency to occupy different areas of the basin. Coalescent simulations ruled out that genetic differences between species could be explained by stochastic processes (genetic drift), suggesting species-specific biological differences as responsible for the observed genetic differences. We discuss how differences in life-history traits and past glaciations interact to shape the evolutionary history of the two Galaxias species.

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4

Andrews, AP. "A new species of Galaxias (Pisces: Galaxiidae) from southern Tasmania." Papers and Proceedings of The Royal Society of Tasmania 119 (1985): 55–60. http://dx.doi.org/10.26749/rstpp.119.55.

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5

Vera-Escalona, Ivan, Livia E. Anthes, Ian G. Paterson, and Daniel E. Ruzzante. "Seventeen novel microsatellite markers for the southern hemisphere fish Galaxias maculatus." Conservation Genetics Resources 6, no. 4 (June 10, 2014): 925–27. http://dx.doi.org/10.1007/s12686-014-0242-4.

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6

Paterson, Rachel A., Gustavo P. Viozzi, Carlos A. Rauque, Verónica R. Flores, and Robert Poulin. "A Global Assessment of Parasite Diversity in Galaxiid Fishes." Diversity 13, no. 1 (January 14, 2021): 27. http://dx.doi.org/10.3390/d13010027.

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Free-living species often receive greater conservation attention than the parasites they support, with parasite conservation often being hindered by a lack of parasite biodiversity knowledge. This study aimed to determine the current state of knowledge regarding parasites of the Southern Hemisphere freshwater fish family Galaxiidae, in order to identify knowledge gaps to focus future research attention. Specifically, we assessed how galaxiid–parasite knowledge differs among geographic regions in relation to research effort (i.e., number of studies or fish individuals examined, extent of tissue examination, taxonomic resolution), in addition to ecological traits known to influence parasite richness. To date, ~50% of galaxiid species have been examined for parasites, though the majority of studies have focused on single parasite taxa rather than assessing the full diversity of macro- and microparasites. The highest number of parasites were observed from Argentinean galaxiids, and studies in all geographic regions were biased towards the highly abundant and most widely distributed galaxiid species, Galaxias maculatus. Parasite diversity generally increased with the number of studies and individual fish examined, however studies which examined parasites from all body tissues could overcome the effects of low study effort. In order to promote further understanding of galaxiid–parasite biodiversity, we provide a series of recommendations, including the use of molecular techniques to verify parasite identity, and highlight the future roles both fish biologists and parasitologists can play.

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7

Berra, TM, LELM Crowley, W. Ivantsoff, and PA Fuerst. "Galaxias maculatus: An explanation of its biogeography." Marine and Freshwater Research 47, no. 6 (1996): 845. http://dx.doi.org/10.1071/mf9960845.

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Galaxias maculatus is a small diadromous fish found in Australia, New Zealand, South America and on some oceanic islands. Two hypotheses have been advanced to explain this widespread, disjunct distribution. McDowall promoted dispersal through the sea of salt-tolerant juveniles but Rosen and others claimed that the distribution reflected the break-up of Gondwana and subsequent drift of the southern continents. Allozyrne electrophoresis of muscle extracts of specimens of Galaxias maculatus from eastern and western Australia, New Zealand and Chile was used to test the hypothesis that populations of G. maculatus from the western Pacific and the eastern Pacific do not differ genetically. FST based on allele frequencies and genotypes was 0.14, suggesting only minor differentiation between eastern and western Pacific populations. Minor differentiation in allele frequency existed at some loci, but no fixation of alternative alleles has occurred. The populations examined appear to be part of the same gene pool, indicating that gene flow via dispersal through the sea occurs today. It is unlikely that South American and Australasian populations would be conspecific if they have exchanged no migrants since the break-up of Gondwana at the end of the Mesozoic.

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8

M. Driessen, Michael, and Stephen A. Mallick. "The vertebrate fauna of the Tasmanian Wilderness World Heritage Area." Pacific Conservation Biology 9, no. 3 (2003): 187. http://dx.doi.org/10.1071/pc030187.

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The Tasmanian Wilderness World Heritage Area encompasses an area of 1.38 million hectares, or approximately 20% of the island state of Tasmania. The World Heritage Area plays a significant role in the conservation of Tasmania's fauna and natural biological processes. The area supports 30 species of terrestrial mammal including three endemic species (91% of total Tasmanian species), 120 species of terrestrial bird including 10 endemic species (76% of state total), 14 species of terrestrial reptile including seven endemic species (67% of state total), seven species of frog including three endemic species (64% of state total), 16 species of freshwater fish including four endemic species (64% of state total), and 68 species of marine fish including one endemic species (14% of state total). A number of vertebrate species are entirely restricted to the World Heritage Area (Moss Froglet, Pedra Branca Skink, Mountain Skink, Pedder Galaxias, Swamp Galaxias and Western Paragalaxias, while the migratory Orange-bellied Parrot breeds only within the World Heritage Area. A number of other species have the majority of their Tasmanian range within the World Heritage Area (Broad-toothed Rat, Ground Parrot, Southern Emu-wren, Tasmanian Tree Frog, Northern Snow Skink, Southern Snow Skink, Bathurst Harbour Skate and the Clarence Galaxias). The World Heritage Area also supports a range of threatened mammal, bird, reptile and fish species. Of the 44 species of introduced vertebrates which have established feral populations in Tasmania, only seven species (16% of state total) have a significant presence within the World Heritage Area and pose a potential threat to the area's integrity. The diversity and endemism of the vertebrate fauna of the World Heritage Area reflects the Gondwanan origins of much of the fauna of western Tasmania, the repeated glaciation of the area during the Pleistocene, and subsequent pulses of speciation among certain taxa.

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9

Revenga, Jorge E., Patricio F. Torres, and Ines Siegmund. "Acanthostomoides apophalliformis (Trematoda: Cryptogonimidae) does not cause detectable mortality in Galaxias maculatus (Teleostomi: Galaxiidae)." Brazilian Archives of Biology and Technology 49, no. 5 (September 2006): 713–15. http://dx.doi.org/10.1590/s1516-89132006000600004.

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The present study was conducted to determine if parasite induced mortality existed in a "puyen" population in Moreno Lake, southern Argentina. Data on both parasite abundance and degree of aggregation of parasite frequency distribution showed the absence of fish mortality induced by A. apophalliformis.

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10

Doughty, PAUL, MITZY PEPPER, and J. SCOTT KEOGH. "Morphological and molecular assessment of the Diplodactylus savagei species complex in the Pilbara region, Western Australia, with a description of a new species." Zootaxa 2393, no. 1 (March 9, 2010): 33. http://dx.doi.org/10.11646/zootaxa.2393.1.3.

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The gecko Diplodactylus savagei is restricted to the rocky Pilbara and Ashburton regions of Western Australia. Recent collections have enabled a reappraisal of morphological and genetic diversity within the taxon. Analysis of 1200 base pairs of the mtDNA gene ND2 and surrounding tRNA found strong support for three lineages within D. savagei: an eastern clade (which includes the type location of D. savagei from Marble Bar), a southern clade and a north-central clade. The eastern and southern clades did not differ in morphology or dorsal pattern. Although there are several subtle differences in morphological characters between the eastern and southern clades compared to the north-central form, there were clear differences in dorsal pattern with the north-central forms having finer, widely-scattered spots, a pale dorsal border to the loreal stripe and a gradual transition between the dorsal and ventral colouration. We describe the north-central form as a new species, D. galaxias sp. nov., based on the distinctiveness of its colour pattern, subtle morphological differences, mtDNA divergence and maintenance of these differences at the edge of the western Hamersley Range where the north-central and southern clades come into contact.

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11

Revenga, Jorge E., Patricio F. Torres, and Miguel Baiz. "Impact of a Caged-Trout Farm on Parasites of Galaxias maculatus in Lake Moreno, Southern Argentina." Journal of Parasitology 91, no. 3 (June 2005): 707–9. http://dx.doi.org/10.1645/ge-441r.

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12

Revenga, J., and P. Scheinert. "Absence of Tylodelphys barilochensis (Trematoda: Diplostomidae): induced mortality in "Puyenes" Galaxias maculatus (Teleostomi: Galaxiidae) from southern Argentina." Memórias do Instituto Oswaldo Cruz 94, no. 5 (September 1999): 659–60. http://dx.doi.org/10.1590/s0074-02761999000500018.

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13

Close, Paul G., Tom J. Ryan, David L. Morgan, Stephen J. Beatty, and Craig S. Lawrence. "First record of ‘climbing’ and ‘jumping’ by juvenile Galaxias truttaceus Valenciennes, 1846 (Galaxiidae) from south-western Australia." Australian Journal of Zoology 62, no. 2 (2014): 175. http://dx.doi.org/10.1071/zo14004.

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Upstream migration of juvenile stages of temperate Australian amphidromous fish typically coincides with seasonally low river discharge when hydraulic (e.g. cascades) and physical (e.g. rock bars) barriers may be common. The ability to ‘climb’ or ‘jump’ may be expected to assist in negotiating low-flow barriers; however, it is presumed to be limited to a few native Australian freshwater fishes. Juvenile stages of Galaxias truttaceus Valenciennes, 1846 were observed ‘climbing’ and ‘jumping’ to successfully negotiate a low, vertical weir wall during their upstream recruitment migrations in south-western Australia. Based on this observation, we propose initial definitions for ‘climbing’ and ‘jumping’ to describe locomotory strategies employed by fishes to negotiate obstacles that would otherwise prevent free passage by normal swimming behaviour. Greater knowledge of the climbing, jumping and swimming performance, especially for small-bodied species and early life stages, will help improve the management of instream barriers for this critically endangered species and other freshwater fishes of southern Australia.

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14

Manosalva, Aliro J., Stefanía Pérez, Bárbara Toledo, Nicole Colin, Evelyn M. Habit, and Konrad Górski. "Variation of stomach content and isotopic niche of puye Galaxias maculatus (Jenyns, 1842) in large river systems of southern Chile." Freshwater Biology 66, no. 6 (March 26, 2021): 1110–22. http://dx.doi.org/10.1111/fwb.13703.

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15

Waters, J. M., and R. W. G. White. "Molecular Phylogeny and Biogeography of the Tasmanian and New Zealand Mudfishes (Salmoniformes : Galaxiidae)." Australian Journal of Zoology 45, no. 1 (1997): 39. http://dx.doi.org/10.1071/zo96049.

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The phylogenetic affinities of the diadromous Tasmanian mudfish, Galaxias cleaveri, have long been problematic. Some systematists have suggested that this species is closely related to the morphologically similar but non-diadromous New Zealand mudfish genus, Neochanna, while others argued that the similarities represent convergent evolution. Most recently, the Tasmanian mudfish was allocated to Neochanna on morphological grounds. The current paper presents sequence data from two mitochondrial genes that support this decision, revealing a close phylogenetic relationship between Tasmanian and New Zealand mudfish. Molecular clock calibrations are used to examine hypotheses of mudfish evolution and biogeography. Estimated divergence times are consistent with the suggestion that Neochanna burrowsius and N. apoda were separated by the uplift of New Zealand’s southern Alps about five million years ago. In addition, the divergence of the Tasmanian and New Zealand mudfish appears to postdate the rifting of Gondwana and is best explained by marine dispersal during the Pliocene.

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16

Waters, J. M., and R. W. G. White. "Molecular phylogeny and biogeography of the Tasmanian and New Zealand mudfishes (Salmoniformes : Galaxiidae)." Australian Journal of Zoology 45, no. 6 (1997): 671. http://dx.doi.org/10.1071/zo96049_co.

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The phylogenetic affinities of the diadromous Tasmanian mudfish, Galaxias cleaveri, have long been problematic. Some systematists have suggested that this species is closely related to the morphologically similar but non-diadromous New Zealand mudfish genus, Neochanna, while others argued that the similarities represent convergent evolution. Most recently, the Tasmanian mudfish was allocated to Neochanna on morphological grounds. The current paper presents sequence data from two mitochondrial genes that support this decision, revealing a close phylogenetic relationship between Tasmanian and New Zealand mudfish. Molecular clock calibrations are used to examine hypotheses of mudfish evolution and biogeography. Estimated divergence times are consistent with the suggestion that Neochanna burrowsius and N. apoda were separated by the uplift of New Zealand’s southern Alps about five million years ago. In addition, the divergence of the Tasmanian and New Zealand mudfish appears to postdate the rifting of Gondwana and is best explained by marine dispersal during the Pliocene.

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17

Revenga, J., and P. Scheinert. "Infections by Helminth Parasites in "Puyenes", Galaxias maculatus (Galaxiidae, Salmoniformes), from Southern Argentina with special reference to Tylodelphys barilochensis (Digenea, Platyhelminthes)." Memórias do Instituto Oswaldo Cruz 94, no. 5 (September 1999): 605–9. http://dx.doi.org/10.1590/s0074-02761999000500007.

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18

Cook, Benjamin D., Mark J. Kennard, Mark Adams, Tarmo A. Raadik, Kathryn Real, Stuart E. Bunn, and Jane M. Hughes. "Hydrographic correlates of within-river distribution and population genetic structure in two widespread species of mountain galaxias (Teleostei, Galaxiidae) in southern Australia." Freshwater Biology 64, no. 3 (December 21, 2018): 506–19. http://dx.doi.org/10.1111/fwb.13238.

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19

Torres, Patricio, Victor Leyan, and Julio Lamilla. "Cyst Stages of Gordiids (Nematomorpha) and Other Eukaryotic Parasites from the Inanga,Galaxias maculatus(Osmeriformes: Galaxiidae), in the Lingue River, Southern Chile." Comparative Parasitology 84, no. 1 (January 2017): 72–79. http://dx.doi.org/10.1654/1525-2647-84.1.72.

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20

Hamilton, Serena H., Carmel A. Pollino, and Keith F. Walker. "Regionalisation of freshwater fish assemblages in the Murray–Darling Basin, Australia." Marine and Freshwater Research 68, no. 4 (2017): 629. http://dx.doi.org/10.1071/mf15359.

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Regionalisations based on species assemblages are a useful framework for characterising ecological communities and revealing patterns in the environment. In the present study, multivariate analyses are used to discern large-scale patterns in fish assemblages in the Murray–Darling Basin, based on information from the Murray–Darling Basin Authority’s first Sustainable Rivers Audit (SRA), conducted in 2004–2007. The Basin is classified into nine regions with similar historical fish assemblages (i.e. without major human intervention), using data that combine expert opinion, museum collections and historical records. These regions are (1) Darling Basin Plains, (2) Northern Uplands, (3) Murray Basin Plains, (4) Northern Alps, (5) Central East, (6) Avoca Lowland, (7) Southern Slopes, (8) Southern Alps and (9) South-Western Slopes. Associations between assemblages and physical variables (catchment area, elevation, hydrology, precipitation, temperature) are identified and used to reinforce the definitions of regions. Sustainable Rivers Audit data are compared with the historical assemblages, highlighting species whose range and abundance have changed since the early 19th century. Notable changes include declines in native species such as silver perch, river blackfish, mountain galaxias, Macquarie perch, trout cod and freshwater catfish, and the advent of alien species including common carp, eastern gambusia, goldfish, redfin perch, brown trout and rainbow trout. Less significant declines are evident for native carp gudgeons, golden perch, two-spined blackfish, bony herring and flathead gudgeon. Changes are evident even in regions where habitats have been little disturbed in the past 200 years.

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21

Fierro, Pablo, Jaime Tapia, Carlos Bertrán, Cristina Acuña, and Luis Vargas-Chacoff. "Assessment of Heavy Metal Contamination in Two Edible Fish Species and Water from North Patagonia Estuary." Applied Sciences 11, no. 6 (March 11, 2021): 2492. http://dx.doi.org/10.3390/app11062492.

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Estuaries worldwide have been severely degraded and become reservoirs for many types of pollutants, such as heavy metals. This study investigated the levels of Cd, Cu, Mn, Ni, Pb, and Zn in water and whole fish. We sampled 40 juvenile silversides Odontesthes regia and 41 juvenile puye Galaxias maculatus from the Valdivia River estuary, adjacent to the urban area in southern South America (Chile). Samples were analyzed using a flame atomic absorption spectrophotometer. In water samples, metals except Zn were mostly below the detection limits and all metals were below the maximum levels established by local guidelines in this estuary. In whole fish samples, concentrations of Cu, Zn, Pb, Mn, and Cd were significantly higher in puyes than in silversides. Additionally, Zn, Pb, and Mn were correlated to body length and weight in puyes, whereas Cd was correlated to body length in silversides. The mean concentration of heavy metals in silverside and puyes were higher than those reported in the literature. In silversides, all heavy metal levels were below the limits permitted by current legislation (FAO), whereas in puyes Pb and Cd levels were above the recommended maximum level established by international guidelines, therefore putting the human population at risk.

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22

Smith, Eric P., and Paul Hintzen. "Multi-Color Imaging of Selected Southern Interacting Galaxies." International Astronomical Union Colloquium 124 (1990): 55–58. http://dx.doi.org/10.1017/s0252921100004887.

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We present preliminary results from a study of selected Arp-Madore Southern Hemisphere peculiar galaxies. Broadband CCD images (BVRI) of a subset of these galaxies allow us to study each galaxy’s optical morphology, color, and (in a crude manner) degree of nuclear activity, and to compare them with similar data we possess on other active galaxies. Many of these galaxies have optical morphologies closely resembling those of powerful radio galaxies (Smith and Heckman 1989), yet their radio emission is unremarkable. Accurate positions for subsequent spectroscopic studies have been determined along with broad band photometry and morphology studies. Detailed observations of these comparatively bright, low-redshift, well-resolved interacting systems should aid our understanding of the role interactions play in triggering galaxy activity. This work is the initial effort in a long term project to study the role played by the dynamics of the interaction in the production and manifestations of activity in galaxies, and the frequency of galaxy mergers.

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23

Flores, Verónica, and Liliana Semenas. "INFECTION PATTERNS OF TYLODELPHYS BARILOCHENSIS AND T. CRUBENSIS (TREMATODA: DIPLOSTOMATIDAE) METACERCARIAE IN GALAXIAS MACULATUS (OSMERIFORMES: GALAXIIDAE) FROM TWO PATAGONIAN LAKES AND OBSERVATIONS ON THEIR GEOGRAPHICAL DISTRIBUTION IN THE SOUTHERN ANDEAN REGION, ARGENTINA." Journal of Parasitology 88, no. 6 (December 2002): 1135–39. http://dx.doi.org/10.1645/0022-3395(2002)088[1135:ipotba]2.0.co;2.

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24

Flores, Veronica, and Liliana Semenas. "Infection Patterns of Tylodelphys barilochensis and T. crubensis (Trematoda: Diplostomatidae) Metacercariae in Galaxias maculatus (Osmeriformes: Galaxiidae) from Two Patagonian Lakes and Observations on Their Geographical Distribution in the Southern Andean Region, Argentina." Journal of Parasitology 88, no. 6 (December 2002): 1135. http://dx.doi.org/10.2307/3285484.

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25

Pen, LJ, and IC Potter. "Biology of the Nightfish, Bostockia porosa Castelnau, in a South-western Australian River." Marine and Freshwater Research 41, no. 5 (1990): 627. http://dx.doi.org/10.1071/mf9900627.

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The biology of the nightfish, Bostockia porosa, is described on the basis of data obtained from monthly samples collected from the southern branch of the Collie River in south-western Australia during 1984, 1985 and 1988. It is estimated that most of the 2463 fish caught during those years belonged to either the 0+ (81.8%) or 1 + (12.5%) age classes. Representatives of the 2+ and 3+ age classes contributed 4.2 and 1.0% respectively, and one fish as old as 6+ was found. The parameters of the von Bertalanffy growth curves (La∞ K and to) were, respectively, 92, 0.818 and -0.151 for males and 104, 0.669 and -0.176 for females. The lengths attained at the end of the 1st, 2nd and 3rd years of life were, respectively, 56 mm (- 1.8 g), 76 mm (-4.5 g) and 85 mm (-6.3 g) for males and 56 mm (-1.8 g), 79 mm (-5.1 g) and 91 mm (-7.8 g) for females. Sexual maturity was attained by most males (61.4%) at the end of the 1st year of life but not by females until the end of the 2nd year of life. The great majority of fish migrated into tributary creeks when these started to flow in the winter. Spawning occurred in the creeks during late August and early September, when freshwater discharge was still high and temperatures and daylight length had just begun to increase. Fecundity ranged from 230 to 1138, with a mean (�1 s.e.) of 608 � 49.1. Bostockia porosa is carnivorous, feeding on a wide range of benthic organisms, particularly ostracods and dipteran larvae. In contrast to Galaxias occidentalis, another abundant endemic species in the Collie River, B. porosa is more active during the night than during the day, spawns 1 month later, and feeds mainly on benthic fauna rather than terrestrial and planktonic fauna.

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26

Karachentseva, V. E., and I. D. Karachentsev. "Southern triplets of galaxies." International Astronomical Union Colloquium 174 (2000): 11–24. http://dx.doi.org/10.1017/s0252921100054683.

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AbstractUsing the ESO/SERC and POSS-I sky surveys we selected 76 isolated triple systems of galaxies with Dec. < −3°. For each triplet the equatorial coordinates, type of configuration, angular diameters, apparent angular separation of the components, morphological types, total magnitudes and some other characteristics are presented. 33 of 76 triplets have the measured radial velocities for all the components. The median values of basic dynamic parameters: a radial velocity dispersion, mean harmonic separation, an absolute magnitude of galaxies, mass-toluminosity ratio are very close to those obtained earlier for 83 northern isolated triple systems from the list of Karachentseva et al. (1979).

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27

Maia, M. A. G., L. Nicolaci da Costa, R. Giovanelli, and M. P. Haynes. "Observations of southern dwarf galaxies." Astronomical Journal 105 (June 1993): 2107. http://dx.doi.org/10.1086/116588.

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28

Scarpa, R., R. Falomo, and J. E. Pesce. "Redshift of southern radio galaxies." Astronomy and Astrophysics Supplement Series 116, no. 2 (April 1996): 295–300. http://dx.doi.org/10.1051/aas:1996115.

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29

Cussac, Víctor Enrique, María Eugenia Barrantes, Claudia Clementina Boy, Konrad Górski, Evelyn Habit, María Eugenia Lattuca, and Javier Hernán Rojo. "New Insights into the Distribution, Physiology and Life Histories of South American Galaxiid Fishes, and Potential Threats to This Unique Fauna." Diversity 12, no. 5 (May 4, 2020): 178. http://dx.doi.org/10.3390/d12050178.

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South American galaxiids occupy both Patagonia and the ichthyogeographic Chilean Province, encompassing glacial Andean deep lakes, shallow plateau lakes, reservoirs, short Pacific rivers and long Atlantic rivers. The total fish fauna includes 29 species, comprising Neotropical fishes (siluriforms and characids), galaxiids, percichthyids, atherinopsids and mugilids, two lamprey species, and several exotic fishes (salmonids, Gambusia spp. and common carp). The family Galaxiidae shares a common ancestry with the Gondwanan temperate fish fauna, played a major role in the post-glacial colonization of Andean lakes and streams, and contributes key species to the food webs. Galaxiid species occupy an enormous latitudinal gradient, show a wide variety of life history patterns and are the southernmost native freshwater fishes of the world. Knowledge of South American galaxiids has improved notably, but new challenges arise due to climate change, biological invasions, damming, aquaculture and contamination. In this changing environment, the future of South American galaxiids should be carefully considered as a legacy of the old Gondwana and a unique attribute of the freshwaters of southern South America.

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30

Einasto, Jaan. "3. Clusters of Galaxies." Transactions of the International Astronomical Union 19, no. 1 (1985): 664–68. http://dx.doi.org/10.1017/s0251107x0000674x.

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Abell and Corwin (34.160.040) have continued the search of southern clusters on photographs taken with the U.K. Schmidt telescope at Siding Spring. A catalogue is in preparation, it continues the Abell catalogue toward southern declinations. West (32.160.019, 32.160.036, 34.160.044) has initiated a study of distant southern clusters with automatic identification of clusters and objective evaluation of their properties. Noonan (30.160.006) and Sarazin et al. (31.160.030) have listed clusters with published redshifts. Numerical simulations have demonstrated the presence of bias in observed clusters as difined by Abell (33.160.006), ranked absolute magnitudes of galaxies are distance dependent (33.160.081), some clusters may be due to projection effects (34.160.009).

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REIMER, James Davis, and Masami OBUCHI. "Acanthaster planci preying on soft corals in southern Japan." Galaxea, Journal of Coral Reef Studies 14, no. 1 (2012): 23–24. http://dx.doi.org/10.3755/galaxea.14.23.

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32

Harnett, J. I., R. F. Haynes, R. Wielebinski, and U. Klein. "Radio Polarization Studies of Some Southern Galaxies." Symposium - International Astronomical Union 140 (1990): 225–26. http://dx.doi.org/10.1017/s0074180900190059.

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We have begun a long-range project to study southern galaxies using the radio telescopes at Parkes and Molonglo, the Siding Spring optical facilities and soon, the Australia Telescope. Here we present the results of polarization mapping at two wavelengths of the galaxies NGC 55, 253,4945, M 83 and the Circinus Galaxy.

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Harnett, J. I., R. F. Haynes, R. Wielebinski, and U. Klein. "Radio Polarization Observations of Three Southern Galaxies." Publications of the Astronomical Society of Australia 8, no. 3 (1990): 257–60. http://dx.doi.org/10.1017/s1323358000023468.

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AbstractObservations of polarized emission and consequently the investigation of magnetic fields in northern galaxies, have been conducted successfully for some time with, for example, the 100-m Effelsberg telescope of the Max-Planck-Institut-für Radioastronomie and the VLA. However, the opportunity to make corresponding studies in the southern hemisphere has only recently become possible. Therefore, we have begun a long-range project aimed at studying the morphology and dynamics of southern galaxies using the facilities of the Parkes and Molonglo radio telescopes, the Siding Spring optical facilities and the Australia Telescope. Here we present preliminary results from Parkes observations of the three well known galaxies: NGC 253, NGC 4945 and M 83.

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34

Huchtmeier, Walter K., and Matthias Ehle. "HI Observations of Southern LSB Dwarf Galaxies from the Karachentsev Catalogue." Publications of the Astronomical Society of Australia 16, no. 1 (1999): 24–27. http://dx.doi.org/10.1071/as99024.

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AbstractIn this paper, we report on HI observations of newly detected nearby dwarf galaxies from the first part of the Karachentsev catalogue which contains low surface brightness galaxies spotted on the POSS II. We performed HI observations of 220 galaxies using the 100-m radio telescope at Effelsberg, the Nançay radio telescope, and the Australia Telescope Compact Array. We discuss global parameters of the whole sample and the observations of the southern sample in more detail. Global parameters of the observed galaxies are as expected from the sample of nearby galaxies (Kraan-Korteweg & Tammann 1979). The increase of the number of known galaxies in the Local Volume (i.e. within a distance of 10 Mpc) could be as high as 20% for the whole sky.

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35

Forbes, Duncan A., and R. P. Norris. "Star formation in southern Seyfert galaxies." Monthly Notices of the Royal Astronomical Society 300, no. 3 (November 1998): 757–66. http://dx.doi.org/10.1046/j.1365-8711.1998.01940.x.

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Peterson, C. J. "BV photometry of southern elliptical galaxies." Publications of the Astronomical Society of the Pacific 98 (May 1986): 486. http://dx.doi.org/10.1086/131782.

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Buta, R. "The Catalog of Southern Ringed Galaxies." Astrophysical Journal Supplement Series 96 (January 1995): 39. http://dx.doi.org/10.1086/192113.

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Baker, Andrew J., Richard I. Davies, M. D. Lehnert, N. A. Thatte, W. D. Vacca, O. R. Hainaut, M. J. Jarvis, G. K. Miley, and H. J. A. Röttgering. "Galaxies in southern bright star fields." Astronomy & Astrophysics 406, no. 2 (August 2003): 593–601. http://dx.doi.org/10.1051/0004-6361:20030812.

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39

Simpson, C., D. L. Clements, S. Rawlings, and M. Ward. "Optical spectroscopy of southern radio galaxies." Monthly Notices of the Royal Astronomical Society 262, no. 4 (June 15, 1993): 889–92. http://dx.doi.org/10.1093/mnras/262.4.889.

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Fairall, A. P. "Some new bright southern Seyfert galaxies." Monthly Notices of the Royal Astronomical Society 218, no. 3 (February 1, 1986): 453–55. http://dx.doi.org/10.1093/mnras/218.3.453.

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Davies, R. D., L. Staveley-Smith, and J. D. Murray. "Neutral hydrogen observations of southern galaxies." Monthly Notices of the Royal Astronomical Society 236, no. 2 (January 1, 1989): 171–85. http://dx.doi.org/10.1093/mnras/236.2.171.

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Sutherland, W. J., R. G. McMahon, S. J. Maddox, J. Loveday, and W. Saunders. "Finding charts for southern IRAS galaxies." Monthly Notices of the Royal Astronomical Society 248, no. 3 (February 1, 1991): 483–86. http://dx.doi.org/10.1093/mnras/248.3.483.

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43

de Carvalho, R. R., and L. N. da Costa. "Surface photometry of southern elliptical galaxies." Astrophysical Journal Supplement Series 68 (October 1988): 173. http://dx.doi.org/10.1086/191286.

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44

Forbes, D. A., and R. P. Norris. "Star formation in southern Seyfert galaxies." Monthly Notices of the Royal Astronomical Society 300, no. 3 (November 1, 1998): 757–66. http://dx.doi.org/10.1111/j.1365-8711.1998.t01-1-01940.x.

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Maia, M. A. G., L. N. da Costa, C. Willmer, P. S. Pellegrini, and C. Rite. "New southern galaxies with active nuclei." Astronomical Journal 93 (March 1987): 546. http://dx.doi.org/10.1086/114336.

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46

Bajaja, E., E. Agüero, and S. Paolantonio. "Spectroscopic observations of southern nearby galaxies." Astronomy and Astrophysics Supplement Series 136, no. 1 (April 1999): 179–87. http://dx.doi.org/10.1051/aas:1999459.

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47

Ma, Jun, and Qiuhe Peng. "Thicknesses of 70 southern spiral galaxies." Science in China Series A: Mathematics 41, no. 5 (May 1998): 557–60. http://dx.doi.org/10.1007/bf02879947.

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48

Puerari, Ivânio, Margarita Valdez-Gutiérrez, Sebastian Gurovich, Kenneth F. Freeman, and Héctor Hernández-Toledo. "Near Infrared Photometry of Southern Pairs and Triplets of Galaxies." Proceedings of the International Astronomical Union 2, S235 (August 2006): 237. http://dx.doi.org/10.1017/s1743921306006405.

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AbstractWe present near infrared photometry of select pairs and triplets of galaxies observed with the CASPIR camera attached to the 2.3m Advanced Technology Telescope at Siding Spring Observatory, Australia. The preliminary results show that galaxies in pairs or triplets present near infrared colors that are redder than normal galaxies. We also performed a morphological analysis using bi-dimensional Fourier Transform techniques, as well as classical bulge + disk fits. Compared to isolated galaxies, the light distribution of galaxies in pairs and triplets often needs a larger number of Fourier coefficients to be well represented. Also, light profiles usually show deviations from the exponential disk (disk distortions, strong bars, etc.). In the future we intend to define some method to quantify the strength of the interactions by using the Fourier coefficients and/or the magnitude of the deviations from the classical Sersic + exponential laws.

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VILLARTA, Karen A., Wilfredo L. CAMPOS, and Pacifico D. BELDIA II. "Spatial variability in reef habitat structure in southern central Philippines." Galaxea, Journal of Coral Reef Studies 15, Supplement (2013): 84–91. http://dx.doi.org/10.3755/galaxea.15.84.

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Mazzolini, Margaret, Janice Long, and Rachel Webster. "Radio Continuum Maps of Southern Barred Spiral Galaxies." International Astronomical Union Colloquium 157 (1996): 239–41. http://dx.doi.org/10.1017/s0252921100049836.

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AbstractA sample of southern spiral galaxies are being observed at 20 and 13 cm with the Australia Telescope Compact Array in order to look for examples of anomalous outflows from the nuclear region. In this paper we discuss the radio continuum maps of the three barred spiral galaxies observed to date.

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