Method for measuring and calculating individual growth and sexual maturity of sthenoteuthis oualaniensis in South China Sea on basis of beak forms

Abstract

The invention relates to the field of aquatic product science, in particular to a method for measuring and calculating individual growth and sexual maturity of sthenoteuthis oualaniensis in South China Sea on the basis of beak forms. Four appearance feature parameters including upper hood length, upper crest length, lower hood length and lower crest length of beak of the sthenoteuthis oualaniensisare used to measure and calculate individual growth and sexual maturity of the sthenoteuthis oualaniensis in South China Sea. Research on influence of individual growth and sexual maturity on the outer form change of the beak of the sthenoteuthis oualaniensis in South China Sea is carried out, and necessary basis is provided for carrying out cephalopoda basic biology and ecology as well as resource quantity assessment by use of the outer forms of the beak.

Description

Technical field [0001] The invention relates to the field of aquatic sciences, and specifically, is a method for measuring the individual growth and sexual maturity of the squid in the South China Sea based on the shape of the horny jaw. Background technique [0002] Sthenoteuthisoualaniensis, commonly known as "Red squid and Southern squid", belongs to Ommastrephidae and Sthenoteuthis. It is widely distributed in tropical and subtropical waters of the Indian Ocean and Pacific Ocean. It has a complex population structure, a large migration range, and abundant resources. , Is the most important economic cephalopod resource in the South my country Sea. The estimated potential resource exceeds 283,000 tons and the development potential is huge. The horny jaw is the main feeding organ of the squid. It has the characteristics of stable structure, corrosion resistance, and large information storage. It is an important material for studying the age and growth of cephalopods, feeding ecol...

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have studied the growth changes, pigmentation, and trace elements of the horny jaws of the kite squid in the Indian Ocean and near the equator (Fang Z, Xu L L, Chen X J, et al. Beak growth pattern of purple-back flying squid Sthenoteuthis oualaniensis in the easterntropical Pacific equatorial waters[J].Fisheries Science,2015,81(3):443–452.Liu Bilin,Chen Xinjun.Analysis of the horny jaw length of the kite squid in the northwestern Indian Ocean[J].Fisheries Science Advances,2010,31(1 ):8-14.), while the research on the horny jaws of the kite squid in the South China Sea is relatively lacking

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