Method for estimating growth period of bahaba flavolabiata through daily growth increment in otolith

Abstract

The invention discloses a method for estimating growth period of bahaba flavolabiata through a daily growth increment in otolith. The method comprises the following steps that sample fishes are collected, and the growth indexes of body length and weight are measured; the sample fishes are dissected, and the otolith is taken out, cleaned and dried for use; the otolith is ground till the otolith center is shown, and otolith sheets are obtained; the otolith sheets are etched till the daily increment can be clearly distinguished; the etched otolith sheets are cleaned and air-dried; the otolith sheets are observed, and the number of otolith growth turn patterns is measured and recorded; the day-age, incubation period and spawning period are calculated. According to the method, the growth periodof bahaba flavolabiata is estimated through the daily growth increment in the otolith, and the time required by the work which is completed through long-term field investigation in the prior art canbe greatly shortened; the sampling time does not need to be limited in the breeding season of bahaba flavolabiata, and the defect is overcome that field sampling cannot be completed in the breeding season of bahaba flavolabiata so that data loss can be caused; the accuracy of estimating the growth period of bahaba flavolabiata is high.

Description

technical field [0001] The invention belongs to the field of fish ecology, and in particular relates to a method for estimating the growth period of the yellow-lipped fish through the sun wheel of the otolith. Background technique [0002] The research object, Bahaba flavolabiata, belongs to the family Stoabaidae and the genus Flavolabiata. It is commonly known as big gull, white flower, Paikou white flower, and pointed white flower. Rich area. The yellow lip fish is a second-class protected aquatic wild animal in the country. Due to the rapid deterioration of the water environment in sea areas and overfishing, its resources have rapidly decreased and it is on the verge of extinction. Due to the extreme lack of resources, it is very difficult to carry out relevant investigations and researches. There have been few research reports on the biology of the yellow-lipped fish in my country, and little is known about its reproductive biology, spawning period or season, and life h...

AI Technical Summary

Problems solved by technology

Due to the extreme lack of resources, it is very difficult to carry out relevant investigations and researches. There have been few research reports on the biology of the yellow-lipped fish in my country, and little is known about its reproductive biology, spawning period or season, and life history. many

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