A method for studying cephalopod growth using grading of horny jaw pigmentation

A technique 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: 2018-08-31
SHANGHAI OCEAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, scholars have divided the pigmentation grades of the horny jaws of cephalopods such as Todaropsis eblanae, Illex coindetii and Todarodes sagittatus, and have also classified the pigmentation levels of the strong mulberry. The relationship between horny jaw length and carcass length of squid (Moroteuthis ingens), Argentinus squid (I.argentinus), cold sea squid (Psychroteuthis glacialis) and other cephalopods was analyzed, but given the individual differences of each cephalopod , the division of grades has not been extended to a larger genus or family, and no uniform division rules have been formed. Secondly, the determination of growth patterns is generally based on horny jaw parameters and biological parameters, with A certain degree of arbitrariness, and the relationship between fixed parameters such as the grade of horny jaw pigment and other continuous parameters has not been established. Therefore, it is necessary to further refine the grading standard to determine the relationship between pigment grade and growth

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  • A method for studying cephalopod growth using grading of horny jaw pigmentation
  • A method for studying cephalopod growth using grading of horny jaw pigmentation
  • A method for studying cephalopod growth using grading of horny jaw pigmentation

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Embodiment 2

[0088] Example 2. (Case 1) Comparison of two different methods for judging pigmentation grades

[0089] 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:

[0090] Table 2 Classification criteria for horny jaw pigmentation

[0091]

[0092] 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:

[0093] 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. ;

[0094] 2. The description and definition of e...

Embodiment 3

[0103] Example 3. (Case 2) Relationship between North Pacific squid horny jaw pigmentation grade and growth

[0104] 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.

[0105] 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 the growth of cephalopods by grading the pigmentation of the horny jaw. According to the different parts and degrees of the pigmentation of the horny jaw of the soft fish, combining the individual size of the horny jaw and the individual size of the soft fish, the pigmentation of the horny jaw is determined. Based on the Chichi information criterion, establish the relationship between the pigment grade and the biology and horny jaw parameters, study the growth characteristics of squid, and finally determine the growth stage of the squid individual through the pigmentation grade of the horny jaw. This method summarizes the morphological characteristics of the horny jaw of cephalopods, and finds out the pigmentation rules of different parts in different periods; quickly and concisely divides the pigmentation grades of the horny jaws of cephalopods; establishes the relationship between pigment levels and biology, horny jaw parameters for the first time In order to better study the growth and feeding conditions of cephalopods, the pigment grades can be directly corresponded to the growth stages of individuals, and the growth stages of individuals can be directly judged by the pigment grades of horny jaws.

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 Patents(China)
IPC IPC(8): A01K61/00
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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