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Eastern Shovelnose Ray (2020)

Aptychotrema rostrata

  • Victor Peddemors (Department of Primary Industries, New South Wales)

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Summary

The Eastern Shovelnose ray is endemic to Australia's east coast and inhabits sandy seabeds in depths up to 150 m. Stock structure is incompletely resolved, and stock status is classified as undefined.

Photo: Mark McGrouther, Australian Museum

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Stock Status Overview

Stock status determination
Jurisdiction Stock Stock status Indicators
New South Wales Eastern Australia Undefined
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Stock Structure

The Eastern Shovelnose Ray, Aptychotrema rostrata, is an endemic batoid common to the east coast of Australia. Distribution ranges from approximately 18°S to 36°S [Last and Stevens 2009] over sandy substrates in depths less than 150 m. No genetic analysis of stock structure has been conducted for Eastern Shovelnose Rays. There appear to be biological differences between Queensland and New South Wales, implying potential stock differentiation within their range. However, further investigation would be required to confirm stock structure. Here, assessment of stock status is presented at the biological stock level—Eastern Australia.

 

 

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Stock Status

Eastern Australia

Almost all the harvest for Eastern Shovelnose Ray occurs in New South Wales. Eastern Shovelnose Rays constitute 75% of the total Rhinobatidae landed in NSW [NSW I&I 2007]. The NSW Ocean Trawl Fishery (OTF) is responsible for approximately 95 per cent of all rhinobatids landed in the commercial fishing sector. Demersal trawl nets are used to catch Eastern Shovelnose Rays in the OTF. In Queensland, the species is one of the most abundant elasmobranch species caught in the East Coast Trawl Fishery (ECTF), with minor catches in the deepwater component of the eastern king prawn sector ([Simpfendorfer et al. 2019].  Although they are primarily discarded, post-release survivorship is unknown and females often abort pups following capture stress [Adams et al. 2018].

Between 1998 and 2008 catch rates within the NSW Ocean Trawl Fishery were stable around 110 t per annum. Since 2014 there has been a reduction in catch; however, this has corresponded with reduced effort in the Ocean Trawl Fishery and catch per unit effort (CPUE) has remained relatively constant.

However, CPUE in NSW trawl fisheries is spatially and temporally highly varied, with significantly higher landings reported between 32°S and 31°S latitudes and double the amount landed in the winter months. 

Recreational fishers catch 18 t per annum, of which 2.4 t (~14%) are kept [Murphy et al. 2020]. No data on post-release survivorship from recreational angling are available.  Indigenous catches are unknown.

In Hervey Bay, Queensland, sexual maturity is reached at between 54–66 cm for females and 60–68 cm for males [Kyne and Bennett 2002]. 

Female Eastern Shovelnose Rays exhibit a positive linear relationship between maternal total length and uterine fecundity, and can have more than 18 embryos, suggesting high fecundity [Meagher 2010]. Eastern Shovelnose rays have an annual, seasonal reproductive cycle in NSW. Reproductive cycles, maximum total length and length at maturity differ between NSW and Queensland implying there may be sub-structuring within the eastern Australian stock of Eastern Shovelnose Rays [Meagher 2010].

There is insufficient information available to confidently classify the status of this stock. On the basis of the evidence provided above, the Eastern Australia biological stock is classified as an undefined stock

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Biology

Eastern Shovelnose Ray biology [Last and Stevens 2009, Kyne and Bennett 2002, Meagher 2010]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Eastern Shovelnose Ray

NSW [Meagher 2010]:

Females: 985 mm (11 years)

Males: 920 mm (8 years)

 

NSW [Meagher 2010]:

Females: 50% maturity at 690-700 mm (3.5-4 years)

Males: 50% maturity at 710-720 mm (4.5-5 years)

 

Queensland [Kyne & Bennett 2002]:

Females: 540-660 mm

Males: 600-680 mm

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Distributions

Distribution of reported commercial catch of Eastern Shovelnose Ray.

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Tables

Fishing methods
New South Wales
Commercial
Mesh Net
Otter Trawl
Various
Management methods
Method New South Wales
Commercial
Effort limits
Gear restrictions
Limited entry
Processing restrictions
Spatial closures
Indigenous
Customary fishing management arrangements
Recreational
Bag limits
Gear restrictions
Catch
New South Wales
Commercial 57.62t
Indigenous unknown
Recreational 2.4 t

New South Wales – Indigenous (Management Methods) (a) Aboriginal Cultural Fishing Interim Access Arrangement—allows an Indigenous fisher in New South Wales to take in excess of a recreational bag limit in certain circumstances; for example, if they are doing so to provide fish to other community members who cannot harvest for themselves; (b) The Aboriginal cultural fishing authority is the authority that Indigenous persons can apply to take catches outside the recreational limits under the Fisheries Management Act 1994 (NSW), Section 37 (1d)(3)(9), Aboriginal cultural fishing authority; and (c) In cases where the Native Title Act 1993 (Cth) applies fishing activity can be undertaken by the person holding native title in line with S.211 of that Act, which provides for fishing activities for the purpose of satisfying their personal, domestic or non-commercial communal needs. In managing the resource where native title has been formally recognised, the native title holders are engaged with to ensure their native title rights are respected and inform management of the State's fisheries resources.

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Catch Chart

Commercial catch of Eastern Shovelnose Ray - note confidential catch not shown

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References

  1. Adams KR, Fetterplace LC, Davis AR, Taylor D and Knott NA 2018. Sharks, rays and abortion: The prevalence of capture-induced partutition in elasmobranchs. Biological Conservation 217:11-27.
  2. Kyne PM and Bennett MB 2002. Reproductive biology of the eastern shovelnose ray, Aptychotrema rostrate (Shaw & Nodder, 1794), from Moreton Bay, Queensland, Australia. Marine and Freshwater Research 53: 583-589.
  3. Last PR and Stevens JD 2009. ‘Sharks and Rays of Australia’. CSIRO Publishing, Melbourne, Victoria, Australia.
  4. Meagher PJB 2010. Reproductive biology, maternal-foetal exchange and fishery impact in the viviparous eastern shovelnose ray Aptychotrema rostrate in New South Wales, Australia. Unpublished PhD thesis, University of Sydney. 190pp.
  5. Murphy JJ, Ochwada-Doyle FA, West LD, Stark KE and Hughes JM 2020. The NSW Recreational Fisheries Monitoring Program - survey of recreational fishing, 2017/18. NSW DPI - Fisheries Final Report Series No. 158.
  6. Murphy, J.J., Ochwada-Doyle, F.A., West, L.D., Stark, K.E. and Hughes, J.M., 2020. The NSW Recreational Fisheries Monitoring Program - survey of recreational fishing, 2017/18. NSW DPI - Fisheries Final Report Series No. 158.
  7. NSW Department of Industry and Innovation 2007. Shovelnose rays (Rajiformes). Wild Fisheries Research Program.
  8. Peddemors V. 2015. Shovelnose Rays (Rajiformes). In: Stewart J, Hegarty A, Young C, Fowler AM and Craig J (Eds) Status of Fisheries Resources in NSW 2013-14. NSW Department of Primary Industries, Mosman: 391pp.
  9. Simpfendorfer C, Kyne P, Rigby C, Sherman S and White W 2019. Eastern Shovelnose Ray, Aptychotrema rostrata. In: Shark futures: a report card for Australia's sharks and rays. Centre for Sustainbale Tropical Fisheries and Aquaculture, James Cook University, May. CC BY 3.0.

Downloadable reports

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