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RESEARCH ARTICLE
Contents Vol 59(5)

Population characteristics of southern sea garfish (Hyporhamphus melanochir, Hemiramphidae) in South Australia

A. J. Fowler A B , M. A. Steer A , W. B. Jackson A and M. T. Lloyd A
+ Author Affiliations
- Author Affiliations

A South Australian Research and Development Institute, PO Box 120, Henley Beach, SA 5022, Australia.

B Corresponding author. Email: fowler.anthony@saugov.sa.gov.au

Marine and Freshwater Research 59(5) 429-443 https://doi.org/10.1071/MF07230
Submitted: 30 November 2007  Accepted: 5 April 2008   Published: 6 June 2008

Abstract

Population dynamics, demography and spatial distribution of an important species of ‘halfbeak’, the southern sea garfish (Hyporhamphus melanochir), were studied in South Australia, which accounts for most of the national catch. Commercial catch and effort data were used to indicate spatial and temporal abundance. Catch sampling provided fish measurements and estimates of age, sex and reproductive maturity. Catches were from throughout South Australia’s gulf region, but three areas separated by hundreds of kilometres produced the highest catches. These relatively protected areas support extensive beds of intertidal and subtidal seagrasses. Statewide commercial fishery catches demonstrated considerable inter-annual variation of 240–320 t year–1. Catches were dominated by 1+ and 2+ fish, with few individuals from the 3+ to 5+ age classes. Females dominated the sex ratios, were the largest individuals, and the largest from each age class. No running ripe fish were sampled. Seasonal variation in the catch and in the lack of spawning fish suggested that adults might move from fishing areas during the spawning season. Length/weight and length/age relationships did not differ between areas separated by hundreds of kilometres, suggesting large-scale movement. Possible population truncation related to fishery exploitation has prompted a stock rebuilding program for the South Australian stock.

Additional keywords: age estimation, age structures, biased sex ratios, halfbeaks, otolith, population truncation, reproductive analysis.


Acknowledgements

We gratefully acknowledge the assistance of Don Dew, manager of Adelaide’s SAFCOL fish market, who gave us ready access to the garfish catches and a place to work (in the fridge). Also, the workers at the market often facilitated the market-measuring program. The data on catch and effort of garfish from the commercial sector of the Marine Scalefish fishery were provided by Angelo Tsolos of the Fisheries Statisitics Unit of SARDI Aquatic Sciences. Annette Doonan prepared several of the maps. Dr Tim Ward provided advice on an early draft of the manuscript and three anonymous referees provided comprehensive comments that led to a substantial improvement in its presentation. The contributions of all are much appreciated.


References

Australian Bureau of Agricultural and Resource Economics (ABARE) (2006). Australian Fisheries Statistics, 2005. Canberra, ABARE. Available from http://abareonlineshop.com/product.asp?prodid=13691

Berkeley, S. A. , and Houde, E. D. (1978). Biology of two exploited species of halfbeaks, Hemiramphus brasiliensis and H. balao from southeast Florida. Bulletin of Marine Science 28, 624–644.
Bryars S. (2003). ‘An Inventory of Important Coastal Fisheries Habitats in South Australia. Fish Habitat Program.’ (Primary Industries and Resources South Australia: Adelaide.)

Campana, S. E. (2001). Accuracy, precision and quality control in age determination, including a review of the use and abuse of age validation methods. Journal of Fish Biology 59, 197–242.
| Crossref | GoogleScholarGoogle Scholar | Cushing D. H. (1988). The study of stock and recruitment. In ‘Fish Population Dynamics’. (Ed. J. A. Gulland.) pp. 105–128. (John Wiley & Sons: Chichester.)

de Silva Samarasinghe, J. R. , and Lennon, G. W. (1987). Hypersalinity, flushing and transient salt-wedges in a tidal gulf – inverse estuary. Estuarine, Coastal and Shelf Science 24, 483–498.
| Crossref | GoogleScholarGoogle Scholar | Earl J. (2007). Feeding biology of the southern sea garfish (Hyporhamphus melanochir, Hemiramphidae) in Gulf St. Vincent, South Australia. B.Sc. (Honours) Thesis, Flinders University, Adelaide, South Australia.

Edyvane K. S. (2000). Conserving marine biodiversity in South Australia. Part 2 – identification of areas of high conservation value in South Australia. SARDI Research Report Series no. 39.

Fowler, A. J. , and Jennings, P. R. (2003). Dynamics in 0+ recruitment and early life history for snapper (Pagrus auratus, Sparidae) in South Australia. Marine and Freshwater Research 54, 941–956.
| Crossref | GoogleScholarGoogle Scholar | Froese R., and Pauly D. (Eds) (2007). FishBase. Available at http://www.fishbase.org, version (08/2007) (verified May 2008).

Hilborn R., and Walters C. J. (1992). ‘Quantitative Fisheries Stock Assessment: Choice, Dynamics and Uncertainty.’ (Chapman and Hall: London.)

Houde, E. D. (1987). Fish early life dynamics and recruitment variability. American Fisheries Society Symposium 2, 17–29.
Jones G. K., Ye Q., Ayvazian S., and Coutin P. (2002). Fisheries biology and habitat ecology of southern sea garfish (Hyporhamphus melanochir) in southern Australian waters. Final Report to FRDC for Project 97/133.

Kailola P. J., Williams M. J., Stewart P. C., Reichelt R. E., McNee A., and Grieve C. (1993). ‘Australian Fisheries Resources. Bureau of Resource Sciences and the Fisheries Research and Development Corporation Canberra, Australia.’ (Imprint Limited: Brisbane.)

Klumpp, D. W. , and Nichols, P. D. (1983). Nutrition of the southern sea garfish Hyporhamphus melanochir: gut passage rate and daily consumption of two food types and assimilation of seagrass components. Marine Ecology Progress Series 12, 207–216.
| Crossref | GoogleScholarGoogle Scholar | Knight M. A., Doonan A. M., and Tsolos A. (2007). South Australian Wild Fisheries Information and Statistics Report. South Australian Research and Development Institute (Aquatic Sciences), Adelaide, F2007/000571-1. SARDI Research Report Series no. 200.

Ling, J. K. (1958). The sea garfish, Reporhamphus melanochir (Cuvier and Valenciennes) (Hemiramphidae), in South Australia: breeding, age determination, and growth rate. Australian Journal of Marine and Freshwater Research 9, 60–110.
| Crossref | GoogleScholarGoogle Scholar | McGarvey R., and Feenstra J. E. (2004). Stock assessment models with graphical user interfaces for key South Australian marine finfish stocks. Final Report to FRDC for Project 99/145.

McGarvey R., Feenstra J. E., Fowler A. J., and Jackson W. B. (2006). Garfish (Hyporhamphus melanochir) Fishery. Fishery Assessment Report to PIRSA for the Marine Scalefish Fishery Management Committee. South Australian Research and Development Institute (Aquatic Sciences), Adelaide, RD04/0152-2. SARDI Research Report Series no. 163.

Middleton, J. F. , and Bye, J. A. T. (2007). A review of the shelf-slope circulation along Australia’s southern shelves: Cape Leeuwin to Portland. Progress in Oceanography 75, 1–41.
| Crossref | GoogleScholarGoogle Scholar | Noell C. J. (2005). Early life stages of the southern sea garfish Hyporhamphus melanochir (Valenciennes, 1846), and their association with seagrass beds. Ph.D. Thesis, University of Adelaide, Adelaide, South Australia.

Noell C., Presser J., and Jones G. K. (2006). Management plan for the South Australian marine scalefish fishery. The South Australian Fisheries Management Series Paper no. 45.

Nunes, R. A. , and Lennon, G. W. (1986). Physical property distributions and seasonal trends in Spencer Gulf, South Australia: an inverse estuary. Australian Journal of Marine and Freshwater Research 37, 39–53.
| Crossref | GoogleScholarGoogle Scholar | Stewart J., Hughes J. M., Gray C. A., and Walsh C. (2005). Life history, reproductive biology, habitat use and fishery status of eastern sea garfish (Hyporhamphus australis) and river garfish (H. regularis ardelio) in NSW waters. Final Report to FRDC for Project 2001(027).

Yamamoto, M. , and Tochino, M. (2003). Juvenile fishes and halfbeak Hyporhamphus sajori eggs removed by the environment-improving ship with floating subjects in the Central Seto Inland Sea. Suisan Zoshoku 51, 337–342.
Ye Q., Short D. A., Green C., and Coutin P. (2002a). Age and growth rate determination. In ‘Fisheries Biology and Habitat Ecology of Southern Sea Garfish (Hyporhamphus melanochir) in Southern Australian Waters’. (Eds G. K. Jones, Q. Ye, S. Ayvazian and P. Coutin.) pp. 150–208. (Final Report to FRDC for Project 97/133.)

Ye Q., Jones G. K., McGlennon D., Ayvazian S., and Coutin P. C. (2002b). Size and age structure of the commercial fisheries and mortality rates. In ‘Fisheries Biology and Habitat Ecology of Southern Sea Garfish (Hyporhamphus melanochir) in Southern Australian Waters’. (Eds G. K. Jones, Q. Ye, S. Ayvazian and P. Coutin.) pp. 35–99. (Final Report to FRDC for Project 97/133.)

Ye Q., Noell C., and McGlennon D. (2002c). Reproductive biology of sea garfish. In ‘Fisheries Biology and Habitat Ecology of Southern Sea Garfish (Hyporhamphus melanochir) in Southern Australian Waters’. (Eds G. K. Jones, Q. Ye, S. Ayvazian and P. Coutin.) pp. 209–253. (Final Report to FRDC for Project 97/133.)