Valid

GB/T 21441-2018Bastard halibut (English PDF)

牙鲆

Preview PDF

This is a limited preview

Buy now to download the full PDF (16 pages)

Need quotation for your management?

Get a formal quotation for GB/T 21441-2018 in 30 minutes.

Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

February 6, 2018

Implementation date

September 1, 2018

Scope

GB/T 21441-2018 is the English-translated version of 牙鲆.

GB/T 21441-2018 is the Chinese national standard that describes the germplasm of the bastard halibut, Paralichthys olivaceus, the flatfish farmed along the northern coast.

It gives the scientific name and classification, the external morphological characteristics with the countable and measurable traits, the growth and reproduction characteristics including the relation between body length and weight, the cytogenetic characteristics and the molecular genetic ones, with the COI gene sequence fragment, and then the detection methods and the rules for deciding whether a stock conforms.

It applies to the identification and testing of bastard halibut germplasm. Hatcheries, broodstock centres and fishery inspection bodies use it. It replaces GB/T 21441-2008, was issued on 6 February 2018 and has applied since 1 September 2018.

Found what you need?

Document preview — GB/T 21441-2018

National Standard of the People's Republic of China

ICS: 65.150
Classification: B 51
Replacing: GB/T 21441-2008

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Scientific Names and Categories
4 Morphological characteristics

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 21441-2008 "Bastard halibut", compared with GB/T 21441-2008, the main changes are as follows.

--- Complementing the 3.2 countable traits and the 3.3 quantifiable traits in GB/T 21441-2008 (see 4.2 and 4.3);

--- In GB/T 21441-2008 4.1, the regression equation for the relationship between body length and weight has been added (see 5.1);

--- Deleted Chapter 6 of the GB/T 21441-2008 biochemical genetic characteristics and the corresponding detection methods;

--- Increased COI gene sequence fragment as a molecular genetic feature (see Chapter 7);

--- Chromosomal detection method refers to the method of GB/T 18654.12 (see 8.4);

--- Supplements the detection methods for external morphological characteristics, growth and reproduction characteristics, and molecular biological characteristics (see 8.2, 8.3, 8.5).

1 Scope

This standard gives the bastard halibut (Paralichthysolivaceus Tmminck Characteristics, growth and reproduction characteristics, cytogenetic characteristics, molecular genetic characteristics, detection methods, and decision rules.

This standard applies to the identification and detection of bastard halibut germplasm.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 18654.2 Inspection of germplasm quality of cultured fish - Part 2. Sampling method

GB/T 18654.3 Test for germplasm quality of cultured fish - Part 3. Determination of traits

GB/T 18654.4 Test for germplasm quality of cultured fish - Part 4. Determination of age and growth

GB/T 18654.12 Test for germplasm quality of cultured fish - Part 12. Analysis of karyotype

3 Scientific Names and Categories

3.1 Scientific name

Bastard halibut ParalichthysolivaceusTmminck

3.2 Classification location

Actinopterygi, Pleuronectiformes, Paralichthyidae, Parali- Chthys).

4 Morphological characteristics

4.1 Form

The body is oval in shape, flattened, with both eyes on the left side of the head; with small scales on the side of the eye, brown, yellowish brown or gray-yellow, usually with three Dark black spots, no white eye with round scales. The left and right sidelines are equally well developed and there are no upper branches. Tail shank is long and tall. There are two nostrils on the side of the eye About in front of the middle of the eye septum, there is a narrow flap at the posterior edge of the anterior nares; no ocular side two nostrils are close to the dorsal edge of the head, and the anterior nasal orifice is also narrow Long flaps. The mouth is large, the anterior position, and the jaw is slightly prominent; the mouth is oblique and symmetrical. The dorsal fin begins approximately at the anterior edge of the upper eye, the left and right pelvic fins are slightly symmetrical, and the posterior edge Double truncated; odd fins have dark stripes, pectoral fins with dark spots or horizontal stripes. Sharp teeth, cone-shaped, up and down each line, are equally developed; anterior teeth The teeth are large and canine teeth.

The shape of the bastard halibut is shown in Figure 1.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

GB/T 35903-2018Bastard halibut—Brood stock，fry and fingerling

Similar standards

GB/T 10030-2026|GB/T 15101-2026|GB/T 15807-2026|GB/T 16871-2026|GB/T 18654.1-2026|GB/T 18654.10-2026

Editions of GB/T 21441

Edition	Title	Revision	Status
GB/T 21441-2018	Bastard halibut	current edition	Current
GB/T 21441-2008	Bastard halibut	previous edition	Superseded

This page sells the current edition, GB/T 21441-2018. Earlier editions are listed for reference only.

How to Download GB/T 21441-2018

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.