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Journal articles on the topic 'Maccullochella peelii peelii'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Nock, Catherine J., Martin S. Elphinstone, Stuart J. Rowland, and Peter R. Baverstock. "Phylogenetics and revised taxonomy of the Australian freshwater cod genus, Maccullochella (Percichthyidae)." Marine and Freshwater Research 61, no. 9 (2010): 980. http://dx.doi.org/10.1071/mf09145.

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Determining the phylogenetic and taxonomic relationships among allopatric populations can be difficult, especially when divergence is recent and morphology is conserved. We used mitochondrial sequence data from the control region and three protein-coding genes (1253 bp in total) and genotypes determined at 13 microsatellite loci to examine the evolutionary relationships among Australia’s largest freshwater fish, the Murray cod, Maccullochella peelii peelii, from the inland Murray–Darling Basin, and its allopatric sister taxa from coastal drainages, the eastern freshwater cod, M. ikei, and Mary River cod, M. peelii mariensis. Phylogenetic analyses provided strong support for taxon-specific clades, with a clade containing both of the eastern taxa reciprocally monophyletic to M. peelii peelii, suggesting a more recent common ancestry between M. ikei and M. peelii mariensis than between the M. peelii subspecies. This finding conflicts with the existing taxonomy and suggests that ancestral Maccullochella crossed the Great Dividing Range in the Pleistocene and subsequently diverged in eastern coastal drainages. Evidence from the present study, in combination with previous morphological and allozymatic data, demonstrates that all extant taxa are genetically and morphologically distinct. The taxonomy of Maccullochella is revised, with Mary River cod now recognised as a species, Maccullochella mariensis, a sister species to eastern freshwater cod, M. ikei. As a result of the taxonomic revision, Murray cod is M. peelii.

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2

Shigdar, S., D. Cook, P. Jones, A. Harford, and A. C. Ward. "Blood cells of Murray cod Maccullochella peelii peelii (Mitchell)." Journal of Fish Biology 70, no. 3 (March 2007): 973–80. http://dx.doi.org/10.1111/j.1095-8649.2007.01351.x.

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3

Daly, Jonathan, David Galloway, William Bravington, Michael Holland, and Brett Ingram. "Cryopreservation of sperm from Murray cod, Maccullochella peelii peelii." Aquaculture 285, no. 1-4 (December 2008): 117–22. http://dx.doi.org/10.1016/j.aquaculture.2008.08.023.

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4

LANCASTER, MJ, MM WILLIAMSON, and CJ SCHROEN. "Iridovirus-associated mortality in farmed Murray cod (Maccullochella peelii peelii)." Australian Veterinary Journal 81, no. 10 (October 2003): 633–34. http://dx.doi.org/10.1111/j.1751-0813.2003.tb12512.x.

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5

Baragahare, Rona, Joy A. Becker, Matt Landos, Jan Šlapeta, and Michelle M. Dennis. "Gastric cryptosporidiosis in farmed Australian Murray cod, Maccullochella peelii peelii." Aquaculture 314, no. 1-4 (April 2011): 1–6. http://dx.doi.org/10.1016/j.aquaculture.2011.01.021.

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6

高, 小强. "Karyotype of the Maccullochella peelii." Open Journal of Fisheries Research 07, no. 03 (2020): 134–41. http://dx.doi.org/10.12677/ojfr.2020.73019.

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7

Liu, Yang, Qiuhua Rao, Jiefeng Tu, Jiaonan Zhang, Minmin Huang, Bing Hu, Qiu Lin, and Tuyan Luo. "Acinetobacter piscicola sp. nov., isolated from diseased farmed Murray cod (Maccullochella peelii peelii)." International Journal of Systematic and Evolutionary Microbiology 68, no. 3 (March 1, 2018): 905–10. http://dx.doi.org/10.1099/ijsem.0.002608.

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8

Koehn, J. D., J. A. McKenzie, D. J. O’Mahony, S. J. Nicol, J. P. O’Connor, and W. G. O’Connor. "Movements of Murray cod (Maccullochella peelii peelii) in a large Australian lowland river." Ecology of Freshwater Fish 18, no. 4 (September 17, 2009): 594–602. http://dx.doi.org/10.1111/j.1600-0633.2009.00375.x.

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9

Baily, J. E., M. J. Bretherton, F. M. Gavine, H. W. Ferguson, and J. F. Turnbull. "The pathology of chronic erosive dermatopathy in Murray cod, Maccullochella peelii peelii (Mitchell)." Journal of Fish Diseases 28, no. 1 (January 2005): 3–12. http://dx.doi.org/10.1111/j.1365-2761.2004.00586.x.

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10

Koehn, John D. "Using radio telemetry to evaluate the depths inhabited by Murray cod (Maccullochella peelii peelii)." Marine and Freshwater Research 60, no. 4 (2009): 317. http://dx.doi.org/10.1071/mf08163.

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Radio telemetry is widely used in studies of freshwater fishes, but the vertical position of fish in riverine environments is rarely reported. The present study tested the application of radio transmitters fitted with depth sensors to determine the vertical position of Murray cod in the lower Ovens River in south-eastern Australia. As the scale of depths in rivers is usually limited (<10 m in the present study), there is a greater need to assess measurement error. The study first involved trials to define depth measurement errors, and a mean relative bias of 9% (range 1.5–14.8%) towards greater depth was recorded. These data were then used to correct the depths recorded from tagged fish. Although data from this preliminary study are somewhat limited, results from the tagged fish showed that by day they all occupied the lower 15% of the water column, indicating that Murray cod exhibit demersal behaviour, using bottom rather than mid-water habitats. Although the present study highlights the importance of tag trials in determining errors, it also indicates the potential application of this technique to understanding the depth-integrated habitat preferences of Murray cod and other species.

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11

Abery, Nigel W., and Sena S. De Silva. "Performance of murray cod, Maccullochella peelii peelii (Mitchell) in response to different feeding schedules." Aquaculture Research 36, no. 5 (March 2005): 472–78. http://dx.doi.org/10.1111/j.1365-2109.2005.01230.x.

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12

Schultz, A. G., P. L. Jones, and T. Toop. "Rodlet cells in Murray cod, Maccullochella peelii peelii (Mitchell), affected with chronic ulcerative dermatopathy." Journal of Fish Diseases 37, no. 3 (March 18, 2013): 219–28. http://dx.doi.org/10.1111/jfd.12099.

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13

Schultz, Aaron G., Jillian M. Healy, Paul L. Jones, and Tes Toop. "Osmoregulatory balance in Murray cod, Maccullochella peelii peelii (Mitchell), affected with chronic ulcerative dermatopathy." Aquaculture 280, no. 1-4 (August 2008): 45–52. http://dx.doi.org/10.1016/j.aquaculture.2008.04.011.

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14

Shigdar, Sarah, Andrew Harford, and Alister C. Ward. "Cytochemical characterisation of the leucocytes and thrombocytes from Murray cod (Maccullochella peelii peelii, Mitchell)." Fish & Shellfish Immunology 26, no. 5 (May 2009): 731–36. http://dx.doi.org/10.1016/j.fsi.2009.03.010.

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15

Douglas, JW, GJ Gooley, BA Ingram, ND Murray, and LD Brown. "Natural hybridization between Murray cod, Maccullochella peelii peelii (Mitchell) and trout cod, Maccullochella macquariensis (Cuvier) (Percichthyidae) in the Murray River, Australia." Marine and Freshwater Research 46, no. 4 (1995): 729. http://dx.doi.org/10.1071/mf9950729.

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Hybridization is confirmed between two wild, naturally sympatric populations of Murray cod, Maccullochella peelii peelii, and trout cod, M. macquariensis, from the Murray River, Australia. Electrophoretic comparisons of proteins in muscle and liver tissues from trout cod, Murray cod, an artificially produced hybrid of Murray cod and trout cod, and putative wild hybrids from the Murray River indicated that the last group were first-generation interspecific hybrids. This is the first record of hybridization between naturally occumng populations of these two species. Naturally occurring wild populations of both trout cod and Murray cod are nonetheless genetically distinct and there is no evidence of introgression between the species. These findings have some implications for management policies and practices in relation to both species, and these are discussed.

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16

LOUGHNAN, SHANNON R., MATTHEW D. BARANSKI, NICK A. ROBINSON, PAUL L. JONES, and CHRISTOPHER P. BURRIDGE. "Microsatellite loci for studies of wild and hatchery Australian Murray cod Maccullochella peelii peelii (Percichthyidae)." Molecular Ecology Notes 4, no. 3 (September 2004): 382–84. http://dx.doi.org/10.1111/j.1471-8286.2004.00660.x.

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17

Ryan, Stephen G., Blair K. Smith, Robert O. Collins, and Giovanni M. Turchini. "Evaluation of Weaning Strategies for Intensively Reared Australian Freshwater Fish, Murray Cod, Maccullochella peelii peelii." Journal of the World Aquaculture Society 38, no. 4 (December 2007): 527–35. http://dx.doi.org/10.1111/j.1749-7345.2007.00126.x.

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18

TURCHINI, G. M., D. S. FRANCIS, and S. S. DE SILVA. "Finishing diets stimulate compensatory growth: results of a study on Murray cod, Maccullochella peelii peelii." Aquaculture Nutrition 13, no. 5 (October 2007): 351–60. http://dx.doi.org/10.1111/j.1365-2095.2007.00483.x.

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19

Douglas, John, Paul Brown, Taylor Hunt, Mark Rogers, and Micheal Allen. "Evaluating relative impacts of recreational fishing harvest and discard mortality on Murray cod (Maccullochella peelii peelii)." Fisheries Research 106, no. 1 (October 2010): 18–21. http://dx.doi.org/10.1016/j.fishres.2010.06.006.

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20

Couch, Alan J., Fiona Dyer, and Mark Lintermans. "Multi-year pair-bonding in Murray cod (Maccullochella peelii)." PeerJ 8 (December 10, 2020): e10460. http://dx.doi.org/10.7717/peerj.10460.

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Mating strategies in fishes are known to include polygyny, polyandry and monogamy and provide valuable insights regarding powerful evolutionary forces such as sexual selection. Monogamy is a complex of mating systems that has been relatively neglected. Previous work on mating strategies in fishes has often been based on observation and focused on marine species rather than freshwater fishes. SNPs are increasingly being used as a molecular ecology tool in non-model organisms, and methods of probabilistic genetic analysis of such datasets are becoming available for use in the absence of parental genotypes. This approach can be used to infer mating strategies. The long-term pair bonding seen in mammals, reptiles and birds has not been recorded in freshwater fishes—in every other respect an extremely diverse group. This study shows that multi-year pair bonding occurs in an Australian Percichthyid fish that exhibits paternal care of eggs and larvae. Using SNPs, full sibling pairs of larvae were found over multiple years in a three-year study. Stable isotope signatures of the larvae support the genetic inference that full sibling pairs shared a common mother, the ultimate source of that isotopic signature during oogenesis. Spatial and temporal clustering also suggests that the full sibling larvae are unlikely to be false positive identifications of the probabilistic identification of siblings. For the first time, we show multi-year pair bonding in a wild freshwater fish. This will have important conservation and management implications for the species. This approach could provide insights into many behavioural, ecological and evolutionary questions, particularly if this is not a unique case. Our findings are likely to initiate interest in seeking more examples of monogamy and alternative mating strategies in freshwater fishes, particularly if others improve methods of analysis of SNP data for identification of siblings in the absence of parental genotypes.

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21

Shamsi, Shokoofeh, Xiaocheng Zhu, Diane P. Barton, Mai Dang, Rafael Freire, and Barbara F. Nowak. "Dermocystidium sp. infection in farmed Murray cod, Maccullochella peelii." Aquaculture 528 (November 2020): 735596. http://dx.doi.org/10.1016/j.aquaculture.2020.735596.

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22

Palmeri, Giorgio, Giovanni M. Turchini, Russell Keast, Philip J. Marriott, Paul Morrison, and Sena S. De Silva. "Effects of Starvation and Water Quality on the Purging Process of Farmed Murray Cod (Maccullochella peelii peelii)." Journal of Agricultural and Food Chemistry 56, no. 19 (October 8, 2008): 9037–45. http://dx.doi.org/10.1021/jf801286n.

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23

Luo, Tuyan, Yang Liu, Can Chen, Qin Luo, Qiuhua Rao, Minmin Huang, Jiefeng Tu, Qiu Lin, and Boqi Weng. "Chryseobacterium aurantiacum sp. nov., isolated from a freshwater pond used for Murray cod (Maccullochella peelii peelii) culture." International Journal of Systematic and Evolutionary Microbiology 68, no. 11 (November 1, 2018): 3397–403. http://dx.doi.org/10.1099/ijsem.0.002987.

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24

Liu, Yang, Qiuhua Rao, Jochen Blom, Qiu Lin, and Tuyan Luo. "Pseudomonas piscis sp. nov., isolated from the profound head ulcers of farmed Murray cod (Maccullochella peelii peelii)." International Journal of Systematic and Evolutionary Microbiology 70, no. 4 (April 1, 2020): 2732–39. http://dx.doi.org/10.1099/ijsem.0.004101.

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A Gram-stain-negative, strictly aerobic, motile, rod-shaped bacterium with monopolar flagella, designated as MC042T, was isolated from the profound head ulcers of farmed Murray cod sampled from Zhejiang Province, China. Analysis of its 16S rRNA gene sequence and multilocus sequence analysis phylogeny showed that strain MC042T belonged to the genus Pseudomonas , showing the highest 16S rRNA gene sequence similarity to Pseudomonas juntendi BML3T (98.9 %), and less than 98.8 % similarity to other Pseudomonas species with validly published names. Whole-genome sequencing and phylogenetic reconstruction based on a core set of 1563 Pseudomonas genes further indicated that strain MC042T was most closely related to the clade formed by Pseudomonas protegens CHA0T and Pseudomonas saponiphila DSM 975T and distantly related to any of the validly published species of the genus Pseudomonas . Furthermore, strain MC042T could be distinguished from its closely related species of the genus Pseudomonas by its ability to assimilate maltose, d-xylose and melibiose, but not d-mannitol. The principal fatty acids were C16 : 0, summed feature 3 (iso-C15 : 0 2-OH and/or C16 : 1ω7c) and summed feature 8 (C18 : 1 ω7c and/or C18 : 1 ω6c). The respiratory quinone was Q-9. Polar lipids of strain MC042T comprised diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, unidentified glycolipids, an unidentified lipid, an unknown glycolipid and aminolipid. Based on its phenotypic, chemotaxonomic and phylogenetic features, strain MC042T is considered to represent a novel species, for which the name Pseudomonas piscis sp. nov. is proposed. The type strain is MC042T (=KCTC 72033T=MCCC 1K03575T).

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25

Newman, Dane M., Paul L. Jones, and Brett A. Ingram. "Advanced ovarian development of Murray cod Maccullochella peelii peelii via phase-shifted photoperiod and two temperature regimes." Aquaculture 310, no. 1-2 (December 2010): 206–12. http://dx.doi.org/10.1016/j.aquaculture.2010.08.024.

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26

Barugahare, Rona, Joy A. Becker, Matt Landos, Jan Šlapeta, and Michelle M. Dennis. "Corrigendum to “Gastric cryptosporidiosis in farmed Australian Murray cod, Maccullochella peelii peelii” [Aquaculture 314 (2011) 1-6]." Aquaculture 318, no. 3-4 (August 2011): 483. http://dx.doi.org/10.1016/j.aquaculture.2011.05.032.

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27

Palmeri, Giorgio, Giovanni M. Turchini, Philip J. Marriott, Paul Morrison, and Sena S. De Silva. "Biometric, nutritional and sensory characteristic modifications in farmed Murray cod (Maccullochella peelii peelii) during the purging process." Aquaculture 287, no. 3-4 (February 2009): 354–60. http://dx.doi.org/10.1016/j.aquaculture.2008.10.052.

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28

Gunasekera, R. "The amino acid profiles in developing eggs and larvae of the freshwater Percichthyid fishes, trout cod, Maccullochella macquariensis and Murray cod, Maccullochella peelii peelii." Aquatic Living Resources 12, no. 4 (August 1999): 255–61. http://dx.doi.org/10.1016/s0990-7440(00)86636-x.

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29

Rourke, Meaghan L., Helen C. McPartlan, Brett A. Ingram, and Andrea C. Taylor. "Biogeography and life history ameliorate the potentially negative genetic effects of stocking on Murray cod (Maccullochella peelii peelii)." Marine and Freshwater Research 61, no. 8 (2010): 918. http://dx.doi.org/10.1071/mf10037.

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Stocking wild fish populations with hatchery-bred fish has numerous genetic implications for fish species worldwide. In the present study, 16 microsatellite loci were used to determine the genetic effects of nearly three decades of Murray cod (Maccullochella peelii peelii) stocking in five river catchments in southern Australia. Genetic parameters taken from scale samples collected from 1949 to 1954 before the commencement of stocking were compared with samples collected 16 to 28 years after stocking commenced, and with samples from a local hatchery that supplements these catchments. Given that the five catchments are highly connected and adult Murray cod undertake moderate migrations, we predicted that there would be minimal population structuring of historical samples, whereas contemporary samples may have diverged slightly and lost genetic diversity as a result of stocking. A Bayesian Structure analysis indicated genetic homogeneity among the catchments both pre- and post-stocking, indicating that stocking has not measurably impacted genetic structure, although allele frequencies in one catchment changed slightly over this period. Current genetic diversity was moderately high (HE = 0.693) and had not changed over the period of stocking. Broodfish had a similar level of genetic diversity to the wild populations, and effective population size had not changed substantially between the two time periods. Our results may bode well for stocking programs of species that are undertaken without knowledge of natural genetic structure, when river connectivity is high, fish are moderately migratory and broodfish are sourced locally.

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30

DE SILVA, S. S., R. M. GUNASEKERA, R. A. COLLINS, and B. A. INGRAM. "Performance of juvenile Murray cod, Maccullochella peelii peelii (Mitchell), fed with diets of different protein to energy ratio." Aquaculture Nutrition 8, no. 2 (May 28, 2002): 79–85. http://dx.doi.org/10.1046/j.1365-2095.2002.00191.x.

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31

Gunasekera, R. M., S. S. De Silva, R. A. Collins, G. Gooley, and B. A. Ingram. "Effect of dietary protein level on growth and food utilization in juvenile Murray cod Maccullochella peelii peelii (Mitchell)." Aquaculture Research 31, no. 2 (February 2000): 181–87. http://dx.doi.org/10.1046/j.1365-2109.2000.00417.x.

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32

Francis, David S., Giovanni M. Turchini, Paul L. Jones, and Sena S. De Silva. "Dietary Lipid Source Modulates in Vivo Fatty Acid Metabolism in the Freshwater Fish, Murray Cod (Maccullochella peelii peelii)." Journal of Agricultural and Food Chemistry 55, no. 4 (February 2007): 1582–91. http://dx.doi.org/10.1021/jf062153x.

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33

Schultz, Aaron G., Sarah L. Shigdar, Paul L. Jones, Alister C. Ward, and Tes Toop. "Groundwater pre-treatment prevents the onset of chronic ulcerative dermatopathy in juvenile Murray cod, Maccullochella peelii peelii (Mitchell)." Aquaculture 312, no. 1-4 (February 2011): 19–25. http://dx.doi.org/10.1016/j.aquaculture.2010.12.013.

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34

Francis, David S., Giovanni M. Turchini, Paul L. Jones, and Sena S. De Silva. "Effects of dietary oil source on growth and fillet fatty acid composition of Murray cod, Maccullochella peelii peelii." Aquaculture 253, no. 1-4 (March 2006): 547–56. http://dx.doi.org/10.1016/j.aquaculture.2005.08.008.

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35

PALMERI, G., G. TURCHINI, and S. DESILVA. "Lipid characterisation and distribution in the fillet of the farmed Australian native fish, Murray cod (Maccullochella peelii peelii)." Food Chemistry 102, no. 3 (2007): 796–807. http://dx.doi.org/10.1016/j.foodchem.2006.06.018.

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36

Palmeri, Giorgio, Giovanni M. Turchini, Fabio Caprino, Russell Keast, Vittorio M. Moretti, and Sena S. De Silva. "Biometric, nutritional and sensory changes in intensively farmed Murray cod (Maccullochella peelii peelii, Mitchell) following different purging times." Food Chemistry 107, no. 4 (April 2008): 1605–15. http://dx.doi.org/10.1016/j.foodchem.2007.09.079.

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37

Harford, Andrew J., Kathryn O'Halloran, and Paul F. A. Wright. "EFFECT OF IN VITRO AND IN VIVO ORGANOTIN EXPOSURES ON THE IMMUNE FUNCTIONS OF MURRAY COD (MACCULLOCHELLA PEELII PEELII)." Environmental Toxicology and Chemistry 26, no. 8 (2007): 1649. http://dx.doi.org/10.1897/06-449r.1.

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38

Koehn, John D., and D. J. Harrington. "Collection and distribution of the early life stages of the Murray cod (Maccullochella peelii peelii) in a regulated river." Australian Journal of Zoology 53, no. 3 (2005): 137. http://dx.doi.org/10.1071/zo04086.

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The Murray cod (Maccullochella peelii peelii) is a large fish species keenly sought by anglers. However, this species has declined in distribution and abundance and is now listed nationally as vulnerable. This study was undertaken in the Ovens and Murray rivers, to collect larvae and age-0 Murray cod and determine the distribution of larval Murray cod around the mid-Murray River irrigation storage of Lake Mulwala. Murray cod larvae were collected from 17 of 18 sites: main channels and flowing anabranch channels of regulated and unregulated rivers, sites upstream and downstream of the lake, in the upper and lower reaches of the lake, and in the outflowing Yarrawonga irrigation channel. Larval Murray cod were collected only by methods that sampled drift in flowing waters. Age-0 Murray cod were collected by electrofishing in the main river, but not in off-channel waters, suggesting that cod are likely to settle into habitats in the main channel at a post-larval stage. The widespread occurrence of drifting larvae suggests that this species may be subject to previously unrecognised threats as they pass through hydro-electric power stations or become stranded in anabranch and irrigation channels. Results of this study are likely to be applicable to other species with drifting larval stages, and are relevant to other locations in the Murray–Darling Basin.

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39

Newman, Dane M., Paul L. Jones, and Brett A. Ingram. "Sexing accuracy and indicators of maturation status in captive Murray cod Maccullochella peelii peelii using non-invasive ultrasonic imagery." Aquaculture 279, no. 1-4 (July 2008): 113–19. http://dx.doi.org/10.1016/j.aquaculture.2008.03.032.

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40

Whiterod, Nick S. "Calibration of a rapid non-lethal method to measure energetic status of a freshwater fish (Murray cod, Maccullochella peelii peelii)." Marine and Freshwater Research 61, no. 5 (2010): 527. http://dx.doi.org/10.1071/mf09105.

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The energetic status of freshwater fish provides a dynamic measure of their energy balance in response to the environment they occupy. Commercially available microwave technology (the ‘energy meter’) provides a rapid, non-lethal and inexpensive alternative to traditional laboratory methods for the determination of energy density. The energy meter requires species-specific confirmation of the water–lipid relationship, and comparison of energy meter readings with laboratory-determined estimates of the whole-body energy density. I explored the applicability of the energy meter to the threatened Murray cod (Maccullochella peelii peelii), using both hatchery and wild individuals. Although hatchery and wild fish varied in lipid content, water content and energy density, the parameter comparisons necessary to calibrate the energy meter were statistically consistent between both groups. Subsequently, a robust combined water–lipid relationship was identified for Murray cod, where energy density was strongly related to both water content and lipid content. Average energy meter readings were capable of providing a rapid, non-lethal and accurate assessment of Murray cod energy density. The successful calibration highlights the applicability of the energy meter to provide a dynamic measure of the energetic status of threatened freshwater fish throughout the world.

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41

Clark, T. D., T. Ryan, B. A. Ingram, A. J. Woakes, P. J. Butler, and P. B. Frappell. "Factorial Aerobic Scope Is Independent of Temperature and Primarily Modulated by Heart Rate in Exercising Murray Cod (Maccullochella peelii peelii)." Physiological and Biochemical Zoology 78, no. 3 (May 2005): 347–55. http://dx.doi.org/10.1086/430034.

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42

Francis, David S., Giovanni M. Turchini, Paul L. Jones, and Sena S. De Silva. "Effects of fish oil substitution with a mix blend vegetable oil on nutrient digestibility in Murray cod, Maccullochella peelii peelii." Aquaculture 269, no. 1-4 (September 2007): 447–55. http://dx.doi.org/10.1016/j.aquaculture.2007.05.021.

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43

Baumgartner, Lee J., Nathan Reynoldson, and Dean M. Gilligan. "Mortality of larval Murray cod (Maccullochella peelii peelii) and golden perch (Macquaria ambigua) associated with passage through two types of low-head weirs." Marine and Freshwater Research 57, no. 2 (2006): 187. http://dx.doi.org/10.1071/mf05098.

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Determining factors responsible for increases in the mortality of freshwater fish larvae are important for the conservation of recruitment processes and for the long-term sustainability of freshwater fish populations. To assess the impact of one such process, Murray cod (Maccullochella peelii peelii Mitchell) and golden perch (Macquaria ambigua Richardson) larvae were arranged into treatment and control groups and passed through different configurations (overshot and undershot) of a low-level weir. Passage through an undershot weir resulted in the death of 95 ± 1% golden perch and 52 ± 13% Murray cod. By comparison, mortality was significantly lower in the overshot treatment and both controls. The relatively large number of undershot weirs within the known distribution of these species could impact upon recruitment over a large scale. It is therefore recommended that water management authorities consider the potential threats of operating undershot gated weirs on the survival of larval fish until further research determines appropriate mitigatory measures for these and other species.

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44

Rourke, Meaghan L., Helen C. McPartlan, Brett A. Ingram, and Andrea C. Taylor. "Polygamy and low effective population size in a captive Murray cod (Maccullochella peelii peelii) population: genetic implications for wild restocking programs." Marine and Freshwater Research 60, no. 8 (2009): 873. http://dx.doi.org/10.1071/mf08218.

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Stocking of freshwater fish species with hatchery-bred fish is a common response to depleted wild stocks, but may have numerous genetic implications. Murray cod, Maccullochella peelii peelii (Mitchell), have been produced in captivity for wild stocking programs for more than 30 years. The potential genetic impacts of this stocking program on wild populations was investigated by using eight microsatellite markers to determine the parentage of 1380 offspring from 46 separate spawnings collected over three consecutive breeding seasons, and by estimating the effective population size of the broodfish generation through demographic and genetic methods. Results revealed unexpected incidences of polygamous spawnings (both polygyny and polyandry), multiple spawnings by both sexes within a season and repeated matings between pairs of fish across multiple seasons. Furthermore, approximately half of the broodfish failed to spawn at all over the 3-year study period. This likely contributed to the estimated effective population size of around half of the census size, moderate but significant reductions in allelic richness in all three cohorts investigated and a small but significant reduction in heterozygosity in two cohorts. These results allowed us to make recommendations regarding captive husbandry that will maximise genetic diversity of fish intended for stocking.

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Growns, Ivor, Darren Ryder, and Lindsey Frost. "The basal food sources for Murray cod (Maccullochella peelii) in wetland mesocosms." Journal of Freshwater Ecology 35, no. 1 (January 1, 2020): 235–54. http://dx.doi.org/10.1080/02705060.2020.1779140.

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Turchini, Giovanni M., David S. Francis, and Sena S. De Silva. "Fatty acid metabolism in the freshwater fish Murray cod (Maccullochella peelii peelii) deduced by the whole-body fatty acid balance method." Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 144, no. 1 (May 2006): 110–18. http://dx.doi.org/10.1016/j.cbpb.2006.01.013.

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Kaminskas, Simon, and Paul Humphries. "Diet of Murray cod (Maccullochella peelii peelii) (Mitchell) larvae in an Australian lowland river in low flow and high flow years." Hydrobiologia 636, no. 1 (November 5, 2009): 449–61. http://dx.doi.org/10.1007/s10750-009-9973-8.

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Svozil, D. P., R. K. Kopf, R. J. Watts, and A. O. Nicholls. "Temperature-dependent larval survival and growth differences among populations of Murray cod (Maccullochella peelii)." Marine and Freshwater Research 70, no. 4 (2019): 459. http://dx.doi.org/10.1071/mf18178.

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Different populations of organisms can vary widely in their responses to environmental conditions and this variation is fundamental to the persistence of species. Using a common garden experiment, we examined temperature-specific growth and survival responses of larvae among populations of Murray cod (Maccullochella peelii) from four regions of the Murray–Darling Basin (MDB), Australia. Fish larvae from the four regions differed significantly in their growth and survival responses at high water temperatures ≥26°C. At 30°C, survival rates of larvae by Day 20 ranged from 0% in the Lachlan region to 82% in the southern region. Opposite to the geographical differences in survival, growth of larvae was highest in the Lachlan (14.8–15.4-mm standard length 95% CI) and lowest in the southern region (13.4–13.9-mm standard length 95% CI) at 26°C where sufficient numbers survived for comparison. Geographical differences in growth and survival responses did not follow a consistent latitudinal gradient as observed for other species, but were closely linked with previously described genetic structure. Our results suggest that the upper thermal limit of M. peelii larvae is near common river temperatures in the MDB and that maintaining functional response diversity and underlying genetic diversity will be important for ensuring the resilience of this apex predator under future climate change.

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Gooley, GJ, TA Anderson, and P. Appleford. "Aspects of the reproductive cycle and gonadal development of Murray cod, Maccullochella peelii peelii (Mitchell) (Percicthidae), in Lake Charlegrark and adjacent farm ponds, Victoria, Australia." Marine and Freshwater Research 46, no. 4 (1995): 723. http://dx.doi.org/10.1071/mf9950723.

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The gonadal development of Murray cod, Maccullochella peelii peelii, in Lake Charlegrark, Victoria, and adjacent farm ponds was evaluated. Gonadosomatic index, macroscopic classification and histological analysis were used to determine the age at first maturity and the gonadal development in this introduced population. There is a marked difference between the sexes in the size at first maturity, with females maturing at approximately 6 years of age and 2000 g in weight and males maturing at 3-4 years and 700 g. Gonadosomatic index data indicate that spawning occurs around November. Ovarian development in this species follows a pattern similar to that in a number of other teleosts. Testes have a lobular structure. Macroscopic evaluation of ovaries provided a good indication of the stage of the development of the gonad. However, the presence of spermatozoa throughout the year in the gonads of mature male fish makes the macroscopic evaluation of testicular development less reliable. Three cod, approximately 1% of the population, contained gonads with both ovarian and testicular tissue.

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Jones, M. J., and I. G. Stuart. "Movements and habitat use of common carp (Cyprinus carpio) and Murray cod (Maccullochella peelii peelii) juveniles in a large lowland Australian river." Ecology of Freshwater Fish 16, no. 2 (June 2007): 210–20. http://dx.doi.org/10.1111/j.1600-0633.2006.00213.x.

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