Sea cucumber larvae attachment substratum adhered with benthic diatom membrane with high induction activity and preparation method of sea cucumber larvae attachment substratum

Abstract

The invention belongs to the field of marine aquaculture, and particularly relates to a sea cucumber larvae attachment substratum adhered with a benthic diatom membrane with high induction activity and a preparation method of the sea cucumber larvae attachment substratum. The sea cucumber larvae attachment substratum comprises the attachment substratum, wherein the benthic diatom membrane with high induction activity is arranged on the substratum. The preparation of the attachment substratum comprises steps of screening benthic diatom strains with high induction activity; culturing the benthic diatom on a large scale; pre-treating the attachment substratum; and optimizing the attachment by the benthic diatom with high induction activity. The sea cucumber larvae attachment substratum provided by the invention is capable of effectively increasing the attachment rate of sea cucumber larvae by higher than 50%, and the benthic diatom used as a food source for the sea cucumber larvae is capable of guaranteeing later growth of the sea cucumber larvae; and the increase of the attachment of the sea cucumber larvae is capable of avoiding the addition of antibiotics in a seedling production process so as to achieve a clean production effect.

Description

technical field [0001] The invention belongs to the field of mariculture, and in particular relates to a sea cucumber seedling attachment base attached with a benthic diatom membrane with high inductive activity and a preparation method thereof. Background technique [0002] The metamorphosis process of sea cucumber larvae from planktonic salivary larvae to attached five-tentacle larvae is the most important link in the development of sea cucumbers, and it is also the key to the success of sea cucumber seedlings. The attachment substrate is an indispensable and important condition for sea cucumber larvae to achieve attachment metamorphosis. The currently commonly used attachment bases are mainly polyethylene corrugated boards, polyethylene mesh sheets, etc., and there are many patents on the attachment bases for sea cucumber larvae, such as the attachment base for sea cucumber larvae with the patent number ZL200720013117.9. At present, the low rate of metamorphosis of larva...

AI Technical Summary

Problems solved by technology

[0003] However, most of the seed producers are still accustomed to using polyethylene corrugated boards or mesh alone as attachment substrates. The attachment metamorphosis rate of sea cucumber larvae on them is low, generally about 20%, which seriously affects the development of sea cucumber industry.

Benthic diatoms with inductive effects are less used, mainly because it is difficult to determine the species of benthic diatoms with high inductive activity

There has not yet been a substrate for sea cucumber larvae with a high rate of metamorphosis optimized for benthic diatoms with high induction activity.

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