Information briefs and risk analyses for species under consideration ...
Information briefs and risk analyses for species under consideration ... Information briefs and risk analyses for species under consideration ...
Species: Coelorinchus bollonsi Common Name: Big-eye (Bollins’) grenadier Species code: CBO Stock area: 1-10 Species: Coelorinchus biclinozonalsis Common Name: Two saddle grenadier Species code: CBI Stock area: 1-10 Species: Macrourus carinatus Common Name: Ridge-scaled grenadier Species code: MCA Stock area: 1-10 52 All images provided by NIWA
Biological information Morphology, growth, reproduction and recruitment 4 Almost nothing is known of rattail age, growth rates and age at maturity or recruitment. Preliminary studies have found, however, that some species may be long-lived (70 years). 5 Big-eye grenadier is a brownish grey species, averaging about 40cm and reaching at least 60cm. 6 White grenadier is a pale brownish-white species with an elongated pointed snout. It averages 50-60cm reaching a maximum length of at least 80 cm. It can provide edible fillets. 7 Two saddle grenadier is one of the most common species of rattail and averages 35- 45cm in length. 8 Ridge-scaled grenadier is a large fish with a maximum reported size of 100cm and a maximum age of 19 years. It is medium brown to straw coloured. Spatial and temporal distribution and key areas (feeding, spawning, migration) 9 Big-eye grenadier is endemic to New Zealand and is caught at depths of 350-800m, but particularly between 400 – 600m. 10 White grenadier is found at depths of 600 – 1200m around New Zealand and southern Australia. 11 Two saddle grenadier is caught in coastal waters at depths of 50 – 350m. 12 Ridge-scaled grenadier is found at depths of 200 – 1200m. It is widely distributed in sub-Antarctic and temperate waters off South Africa, South America and New Zealand. Habitat interactions 13 No specific information is available. Associated species (bycatch and target) 14 Rattails are taken as bycatch in a large number of middle-depth and deepwater fisheries targeting QMS species. Environmental conditions 15 No information is available. Protected species interactions 16 None known. Stock Assessment 17 There are no estimates of current or reference biomass, or sustainable yield for any rattail species or stock. 53
- Page 1 and 2: Species under consideration for int
- Page 3 and 4: OCTOPUS Common name: Octopus Specie
- Page 5 and 6: charts is limited and therefore the
- Page 7 and 8: Figure 1: Comparison of reported la
- Page 9 and 10: Recreational fishery characteristic
- Page 11 and 12: Risk analysis and evaluation STOCK:
- Page 13 and 14: Immediacy and uncertainty risk anal
- Page 15 and 16: Environmental effects and protected
- Page 17 and 18: Table 2: Estimated catch of whelk (
- Page 19 and 20: Recommendation 20 Regardless of whe
- Page 21 and 22: Generic objective 2: Risk to avoidi
- Page 23 and 24: CARPET SHARK Class: Chondrichthyes
- Page 25 and 26: Growth, reproduction and recruitmen
- Page 27 and 28: Figure 3: Commercially landed catch
- Page 29 and 30: Table 2: Processed state percentage
- Page 31 and 32: Sources of Information Data Sources
- Page 33 and 34: Generic objective 3: Risk to provid
- Page 35 and 36: Associated species (bycatch and tar
- Page 37 and 38: Fishing Council record an average o
- Page 39 and 40: Generic objective 3: Risk to provid
- Page 41 and 42: also contributed nearly 9% to the t
- Page 43 and 44: Treaty settlement obligations 20 MF
- Page 45 and 46: Severity of impact (low, medium or
- Page 47 and 48: from observer data in the squid tra
- Page 49 and 50: Risk analysis and evaluation STOCK:
- Page 51: RATTAILS Introduction 1 Rattails (o
- Page 55 and 56: WHX (white grenadier) Landed state
- Page 57 and 58: Risk analysis and evaluation STOCK:
- Page 59 and 60: Additional risk analysis not applic
- Page 61 and 62: Redbait contributed 1% to the total
- Page 63 and 64: Risk analysis and evaluation STOCK:
- Page 65 and 66: Objective(s) returning highest scor
- Page 67 and 68: Habitat interactions 6 No informati
- Page 69 and 70: catches. The reported discards have
- Page 71 and 72: Severity of impact (low, medium or
- Page 73 and 74: Relationship with other QMS stocks
- Page 75 and 76: Protected species interactions 7 No
- Page 77 and 78: Risk analysis and evaluation STOCK:
Biological in<strong>for</strong>mation<br />
Morphology, growth, reproduction <strong>and</strong> recruitment<br />
4 Almost nothing is known of rattail age, growth rates <strong>and</strong> age at maturity or<br />
recruitment. Preliminary studies have found, however, that some <strong>species</strong> may be<br />
long-lived (70 years).<br />
5 Big-eye grenadier is a brownish grey <strong>species</strong>, averaging about 40cm <strong>and</strong> reaching at<br />
least 60cm.<br />
6 White grenadier is a pale brownish-white <strong>species</strong> with an elongated pointed snout. It<br />
averages 50-60cm reaching a maximum length of at least 80 cm. It can provide edible<br />
fillets.<br />
7 Two saddle grenadier is one of the most common <strong>species</strong> of rattail <strong>and</strong> averages 35-<br />
45cm in length.<br />
8 Ridge-scaled grenadier is a large fish with a maximum reported size of 100cm <strong>and</strong> a<br />
maximum age of 19 years. It is medium brown to straw coloured.<br />
Spatial <strong>and</strong> temporal distribution <strong>and</strong> key areas (feeding, spawning,<br />
migration)<br />
9 Big-eye grenadier is endemic to New Zeal<strong>and</strong> <strong>and</strong> is caught at depths of 350-800m,<br />
but particularly between 400 – 600m.<br />
10 White grenadier is found at depths of 600 – 1200m around New Zeal<strong>and</strong> <strong>and</strong> southern<br />
Australia.<br />
11 Two saddle grenadier is caught in coastal waters at depths of 50 – 350m.<br />
12 Ridge-scaled grenadier is found at depths of 200 – 1200m. It is widely distributed in<br />
sub-Antarctic <strong>and</strong> temperate waters off South Africa, South America <strong>and</strong> New<br />
Zeal<strong>and</strong>.<br />
Habitat interactions<br />
13 No specific in<strong>for</strong>mation is available.<br />
Associated <strong>species</strong> (bycatch <strong>and</strong> target)<br />
14 Rattails are taken as bycatch in a large number of middle-depth <strong>and</strong> deepwater<br />
fisheries targeting QMS <strong>species</strong>.<br />
Environmental conditions<br />
15 No in<strong>for</strong>mation is available.<br />
Protected <strong>species</strong> interactions<br />
16 None known.<br />
Stock Assessment<br />
17 There are no estimates of current or reference biomass, or sustainable yield <strong>for</strong> any<br />
rattail <strong>species</strong> or stock.<br />
53
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