Fish culturing method and sac-fry pond for use in practicing same

• US 4,803,949 A
• Filed: 07/10/1987
• Issued: 02/14/1989
• Est. Priority Date: 07/17/1986
• Status: Expired due to Term

• Current Assignee: Misato Plaheat Mfg. Ltd.
• Original Assignee: Misato Plaheat Mfg. Ltd.
• Inventors: Kiyokawa, Shin
• Primary Examiner(s): Swiatek, Robert P.
• Application Number:
  US07/072,183
• Time in Patent Office: 585 Days
• Field of Search: 119/3, 119/4, 119/5
• US Class Current: 119/233
• CPC Class Codes: A01K 61/17 Hatching, e.g. incubators
• CPC Class Codes: A01K 63/06 Arrangements for heating or lighting in, or attached to, receptacles for live fish
• CPC Class Codes: Y02A 40/81 Aquaculture, e.g. of fish

Abstract

A fish culturing method and a sac-fry pond for practicing the method are disclosed, which utilize irradiation of far infrared rays from above the water surface in a culturing pond and/or from the bottom of the pond to promote growth of fry in water of a relatively low temperature, substantially without raising the temperature of water which is consumed in a great amount.

Claims

1. A fish culturing method comprising a step of applying, from an artificial source, heat rays containing far infrared rays but substantially no visible rays over substantially the whole surface of a fish culturing pond in which sac-fry are reared, from one side of said pond, while shutting off said pond from substantially all other light sources

2. A fish culturing method according to claim 1, wherein said far infrared rays are radiated from a position above the surface of the water in said sac-fry pond.

3. A fish culturing method according to claim 1, wherein said far infrared rays are radiated from the bottom surface of said sac-fry pond.

4. A fish culturing method according to claim 1, wherein said far infrared rays are radiated from a position above the surface of the water in said sac-fry pond and the bottom surface of said pond.

5. A sac-fry pond comprising means for applying, from an artificial source, heat rays containing far infrared rays but substantially no visible rays over substantially the whole area of the sac-fry pond and for shutting off said pond from substantially all other light sources, said means being provided on one side of said pond.

6. A sac-fry pond according to claim 5, wherein said means is provided above the surface of the water in said pond.

7. A sac-fry pond according to claim 5, wherein said means is provided on the bottom surface of said pond.

8. A sac-fry pond according to claim 5, wherein said means is provided in a position above the surface of the water in said pond and also on the bottom surface of said pond.