Octopus complex nest and breeding pool

Abstract

The utility model relates to a kind of octopus composite type nest and breeding pond and belongs to aquatic culture facility technical field, the octopus composite type nest is composed of one female octopus nest and three male octopus nests;Female octopus nest and male octopus nest are tubular structure, three male octopus nests are arranged in the upper portion of one female octopus nest, female octopus nest one end opening, male octopus nest two ends opening, the cross-sectional area of the tubular structure of female octopus nest is greater than the cross-sectional area of male octopus nest tubular structure. Reproduction can be carried out to octopus using the composite type nest described in the application to improve the survival rate of octopus parent and mating success rate.

Description

[0001] This invention claims priority to the patent application filed on January 10, 2025, with application number 2025100385642 and title "A composite nest and breeding pool for octopuses and its application method". Technical Field

[0002] This invention belongs to the technical field of aquaculture facilities, specifically a composite nest and breeding pond for octopuses. Background Technology

[0003] Octopuses, characterized by their short lifespan and rapid growth, are among the most promising protein resources in the ocean, making artificial breeding a hot research topic. In my country, artificial breeding of octopuses has been implemented for species such as the short-necked octopus, long-necked octopus, Chinese octopus, and Kagoshima octopus. During mating and spawning, artificial nests are required. Currently, the nests used in production, whether in ceramic jars, reinforced concrete tiles, or PVC pipes, are all single-type nests, suitable only for one octopus, resulting in low utilization of the breeding pond's vertical space. Furthermore, octopuses consume large amounts of food during mating to develop their gonads, necessitating regular cleaning of fish, shrimp, crab, and shellfish remains. An excessive number of nests severely hinders the cleaning of the pond bottom. Furthermore, in production, it has been observed that mating male octopuses are easily disturbed by other males, interrupting the mating process; during mating, male octopuses are preyed upon by females due to excessively close mating distance; and a single female octopus mates with multiple males simultaneously. All of these phenomena reduce the survival rate of parent octopuses and the success rate of mating. Summary of the Invention

[0004] The purpose of this invention is to provide a composite nest and breeding pond for octopuses to solve the current problems in production, such as male octopuses being easily disturbed by other male octopuses, interrupting mating; male octopuses being preyed on by female octopuses during mating due to excessively close mating distance; one female octopus mating with multiple male octopuses at the same time; and the low utilization rate of the three-dimensional space of the breeding pond caused by single-type nests.

[0005] This invention patent is implemented using the following technical solution:

[0006] A composite nest for octopuses consists of one female octopus nest and three male octopus nests. Both the female and male octopus nests are tubular structures. The three male octopus nests are located above the female octopus nest. The female octopus nest is open at one end, and the male octopus nests are open at both ends. The cross-sectional area of ​​the tubular structure of the female octopus nest is larger than the cross-sectional area of ​​the tubular structure of the male octopus nest.

[0007] As a preferred technical solution, the left, right, and rear sides of the female octopus nest and the left and right sides of the male octopus nest are provided with round holes or slits.

[0008] As a preferred technical solution, the cross-section of the female octopus den is a trapezoid, more preferably an isosceles trapezoid; the male octopus den consists of three cuboids of the same size, fixed in a product-shaped arrangement, the cross-section of the male octopus den is a square, and the side length of the square is half of the length of the upper base of the trapezoid.

[0009] Further, the material of the composite den is PC, PVC or any other hard material with a density greater than that of water, and the size is appropriately adjusted according to different breeding octopus species.

[0010] Further, the upper edge of the female octopus den and the lower edge of the male octopus den are provided with outward convex circular holes for fixedly connecting the female octopus den and the male octopus den together.

[0011] The present invention also provides a breeding pond provided with the composite den.

[0012] In the breeding method using the breeding pond, firstly, a number of female octopuses equal to the number of composite dens is arranged, and after the female octopuses settle in the female octopus dens, male octopuses 1.5 times the number of female octopuses are put in.

[0013] Beneficial effects of the present invention compared with the prior art:

[0014] Through the structural arrangement of the composite den, the cross-sectional area of the female octopus den is large and one end is closed. The volume of female octopus is larger than that of male octopus. Out of the instinct of choosing a safe place, female octopus will actively select the female octopus den as an oviposition site. Male octopuses have lower safety requirements than female octopuses, have a relatively smaller body size and prefer dens with smooth water flow, so they will choose to settle in male octopus dens.

[0015] In the present invention, one female octopus den and three male octopus dens are fixed as a group, which meets the requirement of one female octopus mating with multiple male octopuses at the same time. Both male octopuses and female octopuses have independent space, and mating will not be easily interrupted by other male octopuses, reducing fighting casualties of male octopuses caused by competing for mating rights.

[0016] In the present invention, the male octopus den is arranged above and the female octopus den is arranged below. During mating, the male octopus stays in the male octopus den and only extends its hectocotylus into the mantle of the female octopus in the female octopus den, which avoids the risk of being preyed by the female octopus during mating and improves the survival rate of parent octopuses and the mating success rate. Description of Drawings

[0017] Figure 1 is a schematic structural view of the composite den of the present invention; 1. female octopus den, 2. male octopus den, 3. gap. Detailed Description of Embodiments

[0018] The technical solutions of the present invention are further explained below through embodiments, but the protection scope of the present invention is not limited in any form by the embodiments.

[0019] Example 1

[0020] As shown in Figure 1 , a composite octopus den is composed of one female octopus den 1 and three male octopus dens 2; both the female octopus den and the male octopus dens are of tubular structure, the three male octopus dens are arranged at the upper end of the one female octopus den, the female octopus den is open at one end, and the male octopus dens are open at both ends, and the cross-sectional area of the tubular structure of the female octopus den is larger than that of the tubular structure of the male octopus dens. Round holes or slits are provided on the left side, right side and rear side of the female octopus den, and on the left side and right side of the male octopus dens.

[0021] Example 2

[0022] A composite octopus den is composed of one female octopus den 1 and three male octopus dens 2; both the female octopus den and the male octopus dens are of tubular structure, the three male octopus dens are arranged at the upper end of the one female octopus den, the female octopus den is open at one end, and the male octopus dens are open at both ends, and the cross-sectional area of the tubular structure of the female octopus den is larger than that of the tubular structure of the male octopus dens. Round holes or slits are provided on the left side, right side and rear side of the female octopus den, and on the left side and right side of the male octopus dens.

[0023] The cross section of the female octopus den is an isosceles trapezoid; the three male octopus dens are cuboids with the same size and fixed in a "pin" shape, the cross section of each male octopus den is square, and the side length of the square is half of the length of the upper base of the trapezoidal female octopus den.

[0024] The composite den is made of PC, PVC or any other hard material with a density higher than water, and the size can be appropriately adjusted according to different breeding octopus species.

[0025] Outward convex round holes are provided at the upper edge of the female octopus den and the lower edge of the male octopus dens for fixed connection; after the parent octopus finishes spawning, the male octopus dens are removed, and the female octopus den is transferred to a hatching pond for further hatching.

[0026] Example 3

[0027] The composite den described in Example 2 is arranged in a breeding pond for the reproduction of *Octopus sinensis*. When arranging the composite den described in Example 2 in the breeding pond, female *Octopus sinensis* individuals with the same number as the composite dens are put in first; after the female *Octopus sinensis* individuals settle in the female octopus dens, male *Octopus sinensis* individuals with a quantity 1.5 times that of the female *Octopus sinensis* individuals are put in. During the whole mating period, the survival rate of male octopuses, mating frequency and mating success rate in the breeding pond provided with the composite dens are significantly higher than those in the breeding pond provided with traditional dens, and the spawning rate and spawning quantity of female octopuses in the breeding pond provided with the composite dens after mating are also significantly higher than those in the breeding pond provided with traditional dens.

Claims

1. A composite nest for octopuses, characterized in that, The octopus compound nest described consists of one female octopus nest and three male octopus nests; both the female octopus nest and the male octopus nests are of tubular structure, the three male octopus nests are arranged at the upper part of one female octopus nest, one end of the female octopus nest is open, both ends of the male octopus nests are open, and the cross-sectional area of the tubular structure of the female octopus nest is larger than that of the tubular structure of the male octopus nests; Round holes or slits are provided on the left side, right side and rear side of the female octopus nest and the left side and right side of the male octopus nests; outward protrusions around round holes are provided on the upper edge of the female octopus nest and the lower edge of the male octopus nests, for fixedly connecting the female octopus nest and the male octopus nests together.

2. The composite nest for octopuses according to claim 1, characterized in that, The cross section of the female octopus nest is isosceles trapezoidal; the male octopus nests are three cuboids with the same size, which are fixed in a "pin" shape, the cross section of the male octopus nests is square, and the side length of the square is half of the length of the upper base of the isosceles trapezoid.

3. The composite nest for octopuses according to claim 1, characterized in that, The compound nest is made of PC, PVC or any other hard material with a density higher than water, and the size can be adjusted according to different breeding octopus species.

4. A breeding pond, characterized in that, The breeding pond is provided with the compound nest according to any one of claims 1 to 3.

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