Method for studying growth of cephalopods through classification of beak pigmentation

A technology for pigmentation and horny jaws, applied in the field of cephalopod research, can solve the problems that the classification of grades has not been extended to a larger genus or family, the grade of horny jaw pigments has not been established, and a unified division rule has not been formed.

Active Publication Date: 2016-06-01
SHANGHAI OCEAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] At present, scholars have divided the horny jaw pigmentation grades of cephalopods such as Todaropsiseblanae, Illexcoindetii and Todarodes sagittatus, and have also classified the hardy mulberry squid (Moroteuthisingens ), Argentinus (I. argentinus), cold sea squid (Psychroteuthis glacialis) and other cephalopods have analyzed the relationship between horny jaw length and carcass length. It has not expanded to a larger genus or family, and has not formed a unified division rule. Secondly, the determination of the growth model is generally based on the horny jaw parameters and biological parameters, and has a certain degree of randomness. The relationship between fixed parameters such as the grade of horny jaw pigment and other continuous parameters has not been established, so it is necessary to further refine the grading standard to determine the relationship between pigment grade and growth

Method used

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  • Method for studying growth of cephalopods through classification of beak pigmentation
  • Method for studying growth of cephalopods through classification of beak pigmentation
  • Method for studying growth of cephalopods through classification of beak pigmentation

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0087] Example 2. (Case 1) Comparison of two different methods for judging pigmentation grades

[0088] Use the new division method to compare with the original division method. The specific standards of the original division method are as follows: Figure 4 Shown:

[0089] Table 2 Classification criteria for horny jaw pigmentation

[0090]

[0091] After comparing with the original determination standard, it is found that the standard of the present invention (Example 1) has better discrimination. The specific instructions are as follows:

[0092] 1. When the previous measurement standards divided the samples, 0-7 levels were set. Such a setting is a bit cumbersome, and it is not conducive to our judgment. Therefore, it is summarized and simplified in the classification of this application. It is set to 7 levels in total, so that it can be better distinguished according to the characteristics of horny jaw pigmentation. ;

[0093] 2. The description and definition of e...

Embodiment 3

[0102] Example 3. (Case 2) Relationship between North Pacific squid horny jaw pigmentation grade and growth

[0103] A sample of 171 squid (69 females and 102 males) samples from Case 1 was selected. The sample collection sea area is 38°36′N~43°08′N, 150°25′E~166°56′E. After thawing in the laboratory, the carcass length and body weight of soft fish were measured, and the sex and gonad maturity were identified. Carcass length was measured with a tape measure, accurate to 1mm. Body weight was weighed with an electronic balance, accurate to 0.1g. Gonadal maturity is divided into five stages: I, II, III, IV, and V. After 12 measurements of the extracted horny palate, the pigment grade is judged according to the above new criteria.

[0104] It was found that no individuals with horny jaw pigment grades 0, 6, and 7 were found in any of the samples. In female individuals, the proportion of grade 2 pigmentation was the highest ( Figure 5 , 6 , 7), the proportions of grade 2 pi...

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Abstract

The invention provides a method for studying growth of cephalopods through classification of beak pigmentation. The method comprises the following steps: grade classification is performed on beak pigmentation according to different positions and different degrees of beak pigmentation of Ommastrephidae and in combination of beak individual size and Ommastrephidae individual size; on the basis of the AIC (Akaike information criterion), relationships of pigmentation grades with biology and beak parameters are established, growth characteristics of the Ommastrephidae are studied, and growth stages of Ommastrephidae individuals are determined according to beak pigmentation grades. According to the method, morphological characteristics of cephalopod beaks are summarized, and laws of pigmentation in different periods and different positions are found out; the beak pigmentation grades of the cephalopods are classified rapidly and concisely; the relationships of the pigmentation grades with biology and the beak parameters are established for the first time, deep study are performed better on growth and ingestion conditions of the cephalopods, the pigmentation grades are in one-to-one correspondence with individual growth stages directly, and the growth stages of the individuals can be judged directly through the beak pigmentation grades.

Description

technical field [0001] The invention belongs to the field of cephalopod research, and relates to dividing the pigmentation of the horny jaw by using the different parts and degrees of pigmentation of the horny jaw in different periods, according to the law of pigment change and the size of the individual, and establishing its pigmentation. Relationships of grades to corresponding biological parameters, methods for studying cephalopod growth. Background technique [0002] Cephalopods belong to mollusks and are important marine economic species, widely distributed in all oceans and Antarctica. Among them, pelagic soft fish is the main fishing target, and its output accounts for about 70% of the world's total output of cephalopods, occupying an important position in the marine ecosystem. Scholars from all over the world are paying more and more attention to soft fishes, and most soft fishes live in the ocean, and the changes in the ocean environment are very obvious, and it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 方舟陈新军金岳陆化杰刘必林李建华
Owner SHANGHAI OCEAN UNIV
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