caa a22 4500 606226982 CHVBK 20210128101156.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10641-014-0375-z doi (NATIONALLICENCE)springer-10.1007/s10641-014-0375-z Effect of salinity on growth of juvenile Yarra pygmy perch ( Nannoperca obscura [Elektronische Daten] Percichthyidae) [Hillary Mahon, Michael Hammer, James Harris] The threatened Yarra pygmy perch (Nannoperca obscura) is an obligate freshwater fish endemic to the south-eastern coast of mainland Australia, where a majority of river systems have been heavily modified since European settlement. The purpose of this garden study was to explore any relationship between the growth rate of juvenile N. obscura with respect to salinity. Trials were conducted encompassing perceived and potential ranges within the species' environment, through five salinity treatments and recorded growth after 8weeks. Two brood-groups were trialed simultaneously to observe any intrapopulation variance in phenotypic response potentially linked to genetic variance. The salinity trials found a clear model indicating increasing growth for moderate salinities (i.e. 2.5-7.5ppt), therefore identifying the ideal salinity range for N. obscura juveniles. Phenotypic response between brood-groups was varied and inconsistent, potentially reflecting low genetic variability. With a limited genetic variance restricting adaptability, tolerance to a changing environment would be reduced. Therefore increased salinization and subsequent flushing events within habitats may be key threats to the species' survival. Springer Science+Business Media Dordrecht, 2014 Nannoperca obscura nationallicence Pygmy perch nationallicence Salinity nationallicence Growth nationallicence Freshwater fish nationallicence Mahon Hillary School of Biological Sciences, Flinders University, 5001, Adelaide, SA, Australia aut Hammer Michael Museum & Art Gallery of the Northern Territory, GPO Box 4646, 0801, Darwin, NT, Australia aut Harris James School of Biological Sciences, Flinders University, 5001, Adelaide, SA, Australia aut Environmental Biology of Fishes Springer Netherlands 98/6(2015-06-01), 1491-1500 0378-1909 98:6<1491 2015 98 10641 https://doi.org/10.1007/s10641-014-0375-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0375-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mahon Hillary School of Biological Sciences, Flinders University, 5001, Adelaide, SA, Australia aut NATIONALLICENCE 700 1- Hammer Michael Museum & Art Gallery of the Northern Territory, GPO Box 4646, 0801, Darwin, NT, Australia aut NATIONALLICENCE 700 1- Harris James School of Biological Sciences, Flinders University, 5001, Adelaide, SA, Australia aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/6(2015-06-01), 1491-1500 0378-1909 98:6<1491 2015 98 10641