A cost-effective alternative for assessing the size of deep-water fish aggregations
Adrian R. Hordyk A D , Neil R. Loneragan A , Geoff Diver A B and Jeremy D. Prince A C
+ Author Affiliations
- Author Affiliations
A Centre for Fish, Fisheries and Aquatic Ecosystem Research, School of Biological Sciences and Biotechnology, Murdoch University, South Street, Murdoch, WA 6150, Australia.
B Diversity Sustainable Development Consultants P/L, PO Box 309, South Fremantle, WA 6162, Australia.
C Biospherics P/L, PO Box 168, South Fremantle, WA 6162, Australia.
D Corresponding author. Email: a.hordyk@murdoch.edu.au
Marine and Freshwater Research 62(5) 480-490 https://doi.org/10.1071/MF10260
Submitted: 19 October 2010 Accepted: 10 March 2011 Published: 25 May 2011
Abstract
Acoustic methodologies are important tools for monitoring deep-water fish and have the potential to provide high-precision estimates of aggregation size. However, they can be costly to design and implement for monitoring fish. Data from 2 years of scientific surveys of the spawning aggregations of orange roughy (Hoplostethus atlanticus, Collett, 1889) on the Cascade Plateau, Tasmania, collected using commercial fishing vessels and echosounders, were used to develop a cost-effective approach for estimating the size of deep-water aggregations. Criteria were developed to standardise the identification of orange roughy echo-traces from acoustic data from 23 surveys in 2001 and 19 in 2005. The spawning condition of the fish was monitored simultaneously with the acoustics in each year (n = 29 trawls each year). The volumes of the aggregations were estimated throughout the survey period. Although the precision of the estimated aggregation size is low, large amounts of data can be collected over extended periods by using this approach and the equipment on standard commercial fishing echosounders. Aggregation volumes varied markedly during each spawning season and changes in volume appear to be linked to the spawning biology. Monitoring the spawning biology, therefore, provides crucial complementary information for interpreting estimates of aggregation size from acoustic surveys.
Additional keywords: bathypelagic, deep-water, Hoplostethus atlanticus, orange roughy, spawning biology.
References
Andrews, A. H., Tracey, D. M., and Dunn, M. R. (2009). Lead–radium dating of orange roughy (Hoplostethus atlanticus): validation of a centenarian life span. Canadian Journal of Fisheries and Aquatic Sciences 66, 1130–1140.| Lead–radium dating of orange roughy (Hoplostethus atlanticus): validation of a centenarian life span.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXotlegtr8%3D&md5=048912461c5c557aef12691e3742647eCAS |
Bell, J. D., Lyle, J., Bulman, C. M., Graham, K. J., Newton, G. M., et al. (1992). Spatial variation in reproduction, and occurrence of non-reproductive adults, in orange roughy, Hoplostethus atlanticus Collett (Trachichthyidae), from south-eastern Australia. Journal of Fish Biology 40, 107–122.
| Spatial variation in reproduction, and occurrence of non-reproductive adults, in orange roughy, Hoplostethus atlanticus Collett (Trachichthyidae), from south-eastern Australia.Crossref | GoogleScholarGoogle Scholar |
Branch, T. A. (2001). A review of orange roughy Hoplostethus atlanticus fisheries, estimation methods, biology and stock structure. South African Journal of Marine Science 23, 181–203.
Bulman, C. M., and Koslow, J. A. (1992). Diet and food consumption of a deep-sea fish, orange roughy Hoplostethus atlanticus (Pisces: Trachichthyidae), off southeastern Australia. Marine Ecology Progress Series 82, 115–129.
| Diet and food consumption of a deep-sea fish, orange roughy Hoplostethus atlanticus (Pisces: Trachichthyidae), off southeastern Australia.Crossref | GoogleScholarGoogle Scholar |
Clark, M. R. (1996). Biomass estimation of orange roughy: a summary and evaluation of techniques for measuring stock size of a deep-water fish species in New Zealand. Journal of Fish Biology 49, 114–131.
| Biomass estimation of orange roughy: a summary and evaluation of techniques for measuring stock size of a deep-water fish species in New Zealand.Crossref | GoogleScholarGoogle Scholar |
Clarke, M. W., Kelly, C. J., Connolly, P. L., and Molly, J. P. (2003). A life history approach to the assessment and management of deepwater fisheries in the Northeast Atlantic. Journal of Northwest Atlantic Fishery Science 31, 401–411.
Coetzee, J. (2000). Use of a shoal analysis and patch estimation system (SHAPES) to characterise sardine schools. Aquatic Living Resources 13, 1–10.
| Use of a shoal analysis and patch estimation system (SHAPES) to characterise sardine schools.Crossref | GoogleScholarGoogle Scholar |
Diner, N. (2001). Correction on school geometry and density: approach based on acoustic image simulation. Aquatic Living Resources 14, 211–222.
| Correction on school geometry and density: approach based on acoustic image simulation.Crossref | GoogleScholarGoogle Scholar |
Foote, C. J., Knudsen, H. P., Vestnes, G., MacLennan, D. N., and Simmonds, J. E. (1987). Calibration of acoustic instruments for fish density estimation: a practical guide. ICES Cooperative Research Report Number 144. International Council for the Exploration of the Sea, Copenhagen, Denmark.
Gordon, J. D. M. (2001). Deep-water fisheries at the Atlantic Frontier. Continental Shelf Research 21, 987–1003.
| Deep-water fisheries at the Atlantic Frontier.Crossref | GoogleScholarGoogle Scholar |
Gordon, J. D. M. (2001). Deep-water fish and fisheries: introduction. Fisheries Research 51, 105–111.
| Deep-water fish and fisheries: introduction.Crossref | GoogleScholarGoogle Scholar |
Haedrich, R. L., Merrett, N. R., and O’Dea, N. R. (2001). Can ecological knowledge catch up with deep-water fishing? a North Atlantic perspective. Fisheries Research 51, 113–122.
| Can ecological knowledge catch up with deep-water fishing? a North Atlantic perspective.Crossref | GoogleScholarGoogle Scholar |
Horn, P. L., Tracey, D. M., and Clark, M. (1998). Between-area differences in age and length at first maturity of the orange roughy Hoplostethus atlanticus. Marine Biology 132, 187–194.
| Between-area differences in age and length at first maturity of the orange roughy Hoplostethus atlanticus.Crossref | GoogleScholarGoogle Scholar |
Johannes, R. E. (1981). ‘Words of the Lagoon: Fishing and Marine Lore in the Palau District of Micronesia.’ (University of California Press: Berkeley, CA.)
Johannes, R. E., Squire, L., Granam, T., Sadovy, Y., and Renguul, H. (1999). Spawning aggregations of Groupers (Serranidae) in Palau. Marine Conservation Research Series Publication 1, 1–144.
Kloser, R. J. (1996). Improved precision of acoustic surveys of benthopelagic fish by means of a deep-towed transducer. ICES Journal of Marine Science 53, 407–413.
| Improved precision of acoustic surveys of benthopelagic fish by means of a deep-towed transducer.Crossref | GoogleScholarGoogle Scholar |
Kloser, R., Koslow, J. A., and Williams, A. (1996). Acoustic assessment of the biomass of a spawning aggregation of orange roughy (Hoplostethus atlanticus, Collett) off south-eastern Australia, 1990–93. Marine and Freshwater Research 47, 1015–1024.
| Acoustic assessment of the biomass of a spawning aggregation of orange roughy (Hoplostethus atlanticus, Collett) off south-eastern Australia, 1990–93.Crossref | GoogleScholarGoogle Scholar |
Kloser, R., Williams, A., and Koslow, J. A. (1997). Problems with acoustic target strength measurements of a deepwater fish, orange roughy (Hoplostethus atlanticus, Collett). ICES Journal of Marine Science 54, 60–71.
| Problems with acoustic target strength measurements of a deepwater fish, orange roughy (Hoplostethus atlanticus, Collett).Crossref | GoogleScholarGoogle Scholar |
Kloser, R. J., Ryan, T., Sakov, P., Williams, A., and Koslow, J. A. (2002). Species identification in deep water using multiple acoustic frequencies. Canadian Journal of Fisheries and Aquatic Sciences 59, 1065–1077.
| Species identification in deep water using multiple acoustic frequencies.Crossref | GoogleScholarGoogle Scholar |
Koslow, J. A., Kloser, R. J., and Stanley, C. (1995). Avoidance of a camera system by a deepwater fish, the orange roughy (Hoplostethus atlanticus). Deep-Sea Research. Part I, Oceanographic Research Papers 42, 233–244.
| Avoidance of a camera system by a deepwater fish, the orange roughy (Hoplostethus atlanticus).Crossref | GoogleScholarGoogle Scholar |
Koslow, J. A., Bulman, C. M., Lyle, J., and Haskard, K. A. (1995). Biomass assessment of a deep-water fish, the orange roughy (Hoplostethus atlanticus), based on an egg survey. Marine and Freshwater Research 46, 819–830.
| Biomass assessment of a deep-water fish, the orange roughy (Hoplostethus atlanticus), based on an egg survey.Crossref | GoogleScholarGoogle Scholar |
Koslow, J. A., Boehlert, G. W., Gordon, J. D. M., Haedrich, R. L., Lorance, P., et al. (2000). Continental slope and deep-sea fisheries: implications for a fragile ecosystem. ICES Journal of Marine Science 57, 548–557.
| Continental slope and deep-sea fisheries: implications for a fragile ecosystem.Crossref | GoogleScholarGoogle Scholar |
Lorance, P., Dupouy, H., and Allain, V. (2001). Assessment of the roundnose grenadier (Coryphaenoides rupestris) stock in the Rockall Trough and neighbouring areas (ICES Sub-areas V–VII). Fisheries Research 51, 151–163.
| Assessment of the roundnose grenadier (Coryphaenoides rupestris) stock in the Rockall Trough and neighbouring areas (ICES Sub-areas V–VII).Crossref | GoogleScholarGoogle Scholar |
McClatchie, S., and Coombs, R. F. (2005). Low target strength fish in mixed species assemblages: the case of orange roughy. Fisheries Research 72, 185–192.
| Low target strength fish in mixed species assemblages: the case of orange roughy.Crossref | GoogleScholarGoogle Scholar |
McClatchie, S., Thorne, R. E., Grimes, P., and Hanchet, S. (2000). Ground truth and target identification for fisheries acoustics. Fisheries Research 47, 173–191.
| Ground truth and target identification for fisheries acoustics.Crossref | GoogleScholarGoogle Scholar |
Merrett, N. R., and Haedrich, R. L. (1997). ‘Deep-sea Demersal Fish and Fisheries.’ (Chapman and Hall: London.)
Misund, O. A. (1997). Underwater acoustics in marine fisheries and fisheries research. Reviews in Fish Biology and Fisheries 7, 1–34.
| Underwater acoustics in marine fisheries and fisheries research.Crossref | GoogleScholarGoogle Scholar |
Misund, O. A., Aglen, A., Beltestad, A. K., and Dalen, J. (1992). Relationships between the geometric dimensions and biomass of schools. ICES Journal of Marine Science 49, 305–315.
| Relationships between the geometric dimensions and biomass of schools.Crossref | GoogleScholarGoogle Scholar |
Morato, T., Watson, R., Pitcher, T. J., and Pauly, D. (2006). Fishing down the deep. Fish and Fisheries 7, 24–34.
| Fishing down the deep.Crossref | GoogleScholarGoogle Scholar |
Myriax (2009). ‘Echoview 4.70.’ (Myriax Software Pty Ltd: Hobart, Tas.)
Ona, E., and Mitson, R. B. (1996). Acoustic sampling and signal processing near the seabed: the deadzone revisited. ICES Journal of Marine Science: Journal du Conseil 53, 677–690.
| Acoustic sampling and signal processing near the seabed: the deadzone revisited.Crossref | GoogleScholarGoogle Scholar |
Pankhurst, N. W., McMillan, P. J., and Tracey, D. M. (1987). Seasonal reproductive cycles in three commercially exploited fishes from the slope waters off New Zealand. Journal of Fish Biology 30, 193–211.
| Seasonal reproductive cycles in three commercially exploited fishes from the slope waters off New Zealand.Crossref | GoogleScholarGoogle Scholar |
Partridge, B. L., Pitcher, T. J., Cullen, J. M., and Wilson, J. (1980). The three-dimensional structure of fish schools. Behavioral Ecology and Sociobiology 6, 277–288.
| The three-dimensional structure of fish schools.Crossref | GoogleScholarGoogle Scholar |
Pitcher, T. J., and Partridge, B. L. (1979). Fish school density and volume. Marine Biology 54, 383–394.
| Fish school density and volume.Crossref | GoogleScholarGoogle Scholar |
Punt, A. E. (2003). The challenges of, and future prospects for, assessing deepwater marine resources: experiences from Australia, New Zealand, Southern Africa and the United States. In ‘Deep Sea 2003: Conference on the Governance and Management of Deep-sea Fisheries. Part 1: Conference Reports. Queenstown, New Zealand’. (Ed. R. Shotton.) pp. 138–148. (Food and Agriculture Organization of the United Nations: Rome.)
Roberts, C. M. (2002). Deep impact: the rising toll of fishing in the deep sea. Trends in Ecology & Evolution 17, 242–245.
| Deep impact: the rising toll of fishing in the deep sea.Crossref | GoogleScholarGoogle Scholar |
Ryan, T. E., Kloser, R. J., and Macaulay, G. J. (2009). Measurement and visual verification of fish target strength using an acoustic–optical system attached to a trawlnet. ICES Journal of Marine Science 66, 1238–1244.
| Measurement and visual verification of fish target strength using an acoustic–optical system attached to a trawlnet.Crossref | GoogleScholarGoogle Scholar |
Zeldis, J. R. (1993). Applicability of egg surveys for spawning-stock biomass estimation of snapper, orange roughy, and hoki in New Zealand. Bulletin of Marine Science 53, 864–890.
