Retinomotor Response and Retinal Adaptation of Japanese Common Squid Todarodes pacificus at Capture with Jigs

Hiroshi Inada

doi:10.2331/fishsci.62.663

Retinomotor Response and Retinal Adaptation of Japanese Common Squid Todarodes pacificus at Capture with Jigs

Hiroshi Inada

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Keywords: squid jigging fishery, fishing light, Japanese common squid, retinomotor response

JOURNAL FREE ACCESS

1996 Volume 62 Issue 5 Pages 663-669

DOI https://doi.org/10.2331/fishsci.62.663

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Published: 1996 Received: June 30, 1995 Available on J-STAGE: June 30, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: June 30, 2008 Reason for correction: - Correction: CITATION Details: Wrong : 1) M. J. Wells: Brain and behaviour in Cephalopods, Stanford University Press, Stanford, 1962, p. 171.
2) T. Hara: Photosensitive pigments in cephalopod retina. Zool. Mag., 77, 99-108 (1968) (in Japanese).
3) H. Inada and M. Ogura: Historical changes of fishing light and its operation in squid jigging fisheries. Rep. Tokyo Univ. Fish., 24, 189-207 (1988) (in Japanese).
4) T. Okutani: Useful and latent cuttlefish and squids of the world, National Cooperative Association of Squid Processors for the 15th Anniversary of its Foundation, Tokyo, 1980, pp. 2-6.
5) S. Duke-Elder: The eye in evolution, Henry Kimpton, London, 1958, p. 144.
6) J. Z. Young: Light-and dark-adaptation in the eyes of some cephalopods. Proc. Zool. Soc., 140, 255-283 (1962).
7) A. I. Cohen: An ultrastructure analysis of the photoreceptors of the squid and their synoptic connections. J. Comp. Neurol., 147, 361-378 (1973).
8) N. W. Daw and A. L. Pearlman: Pigment migration and adaptation in the eye of the squid Loligo pealei. J. Gen. Physiol., 63, 22-36 (1974).
9) E. C. Flores, S. Igarashi, T. Mikami and K. Kobayashi: Studies on squid behavior in relation to fishing I, On the handling of squid Todarodes pacificus for behavioral study. Bull. Fac. Fish. Hokkaido Univ., 27, 145-151 (1976).
10) T. Suzuki, H. Inada, and H. Takahashi: Retinal adaptation of Japanese common squid Todarodes pacificus Steenstrup to light changes. Bull. Fac. Fish. Hokkaido Univ., 36, 191-199 (1985).
11) T. Nazumi: On the fishing ground of Japanese common squid in the south-west area of the Sea of Japan. Bull. Jap. Soc. Fish. Ocean., 14, 108-114 (1969) (in Japanese).
12) K. Kanda: Changes of squid Todarodes pacificus fishing ground from the viewpoint of oceanographic condition. Bull. Jap. Soc. Fish. Ocean., 21, 68-77 (1972) (in Japanese).
13) T. Suzuki: Studies on the relationship between current boundary zones in waters to the southeast of Hokkaido and migration of the squid Ommastrephes sloani pacificus Steenstrup. Mem. Fac. Fish. Hokkaido Univ., 11, 75-153 (1963).
14) K. Shibata: An analysis on echo images of fish finder in the survey of squid fishing ground around the Tsushima Islands. Proc. Acoust. Fish. Resources Res., 3, 28-33 (1967) (in Japanese).
15) T. Nazumi: Discussion on squid jigging fishery and fishing light. Nippon Suisan Gakkaishi, 38, 886-889 (1972) (in Japanese).
16) T. Suzuki: Detection of Japanese common squid Todarodes pacificus and their behavior by fish finder. Suisan Sekai, 25 (3), 80-88 (1976) (in Japanese).
17) G. Kawamura: Fundamental study on application of the vision of spotted mackerel Pneumatophorus tapeinocephlus (Bleeker) to angling techniques-III, Retinomotor response. Nippon Suisan Gakkaishi, 45, 553-555 (1979) (in Japanese).
18) G. Kawamura: Fundamental study on application of the vision of spotted mackerel Pneumatophorus tapeinocephlus (Bleeker) to angling techniques-IV, Retinal adaptation of angled fish. Nippon Suisan Gakkaishi, 45, 667-671 (1979) (in Japanese).
19) G. Kawamura: Fundamental study on application of the vision of spotted mackerel Pneumatophorus tapeinocephlus (Bleeker) to angling techniques-V, Discussionon the light intensity of fish lamp. Nippon Suisan Gakkaishi 45, 1237-1240 (1979) (in Japanese).
20) J. Soeda: Studies on the ecology and the breeding habits of the squid Ommastrephes sloani pacificus Steenstrup. Bull. Hokkaido Reg. Fish. Res. Lab., 14, 1-24 (1956).
21) E. C. Flores: Studies on the maintenance and behavior of the Japanese common squid Todarodes pacificus Steenstrup in relation to fishing. Ph. D. thesis, University of Hokkaido, Hakodate, 1979, p. 166.

Right : 1) M. J. Wells: Brain and behaviour in Cephalopods, Stanford University Press, Stanford, 1962, p. 171.
2) T. Hara: Photosensitive pigments in cephalopod retina. Zool. Mag., 77, 99-108 (1968) (in Japanese).
3) H. Inada and M. Ogura: Historical changes of fishing light and its operation in squid jigging fisheries. Rep. Tokyo Univ. Fish., 24, 189-207 (1988) (in Japanese).
4) T. Okutani: Useful and latent cuttlefish and squids of the world, National Cooperative Association of Squid Processors for the 15th Anniversary of its Foundation, Tokyo, 1980, pp. 2-6.
5) S. Duke-Elder: The eye in evolution, Henry Kimpton, London, 1958, p. 144.
6) J. Z. Young: Light-and dark-adaptation in the eyes of some cephalopods. Proc. Zool. Soc., 140, 255-283 (1962).
7) A. I. Cohen: An ultrastructure analysis of the photoreceptors of the squid and their synoptic connections. J. Comp. Neurol., 147, 361-378 (1973).
8) N. W. Daw and A. L. Pearlman: Pigment migration and adaptation in the eye of the squid Loligo pealei. J. Gen. Physiol., 63, 22-36 (1974).
9) E. C. Flores, S. Igarashi, T. Mikami and K. Kobayashi: Studies on squid behavior in relation to fishing I, On the handling of squid Todarodes pacificus for behavioral study. Bull. Fac. Fish. Hokkaido Univ., 27, 145-151 (1976).
10) T. Suzuki, H. Inada, and H. Takahashi: Retinal adaptation of Japanese common squid Todarodes pacificus Steenstrup to light changes. Bull. Fac. Fish. Hokkaido Univ., 36, 191-199 (1985).
11) T. Nazumi: On the fishing ground of Japanese common squid in the south-west area of the Sea of Japan. Bull. Jap. Soc. Fish. Ocean., 14, 108-114 (1969) (in Japanese).
12) K. Kanda: Changes of squid Todarodes pacificus fishing ground from the viewpoint of oceanographic condition. Bull. Jap. Soc. Fish. Ocean., 21, 68-77 (1972) (in Japanese).
13) T. Suzuki: Studies on the relationship between current boundary zones in waters to the southeast of Hokkaido and migration of the squid Ommastrephes sloani pacificus Steenstrup. Mem. Fac. Fish. Hokkaido Univ., 11, 75-153 (1963).
14) K. Shibata: An analysis on echo images of fish finder in the survey of squid fishing ground around the Tsushima Islands. Proc. Acoust. Fish. Resources Res., 3, 28-33 (1967) (in Japanese).
15) T. Nazumi: Discussion on squid jigging fishery and fishing light. Nippon Suisan Gakkaishi, 38, 886-889 (1972) (in Japanese).
16) T. Suzuki: Detection of Japanese common squid Todarodes pacificus and their behavior by fish finder. Suisan Sekai, 25 (3), 80-88 (1976) (in Japanese).
17) G. Kawamura: Fundamental study on application of the vision of spotted mackerel Pneumatophorus tapeinocephlus (Bleeker) to angling techniques-III, Retinomotor response. Nippon Suisan Gakkaishi, 45, 553-555 (1979) (in Japanese).
18) G. Kawamura: Fundamental study on application of the vision of spotted mackerel Pneumatophorus tapeinocephlus (Bleeker) to angling techniques-IV, Retinal adaptation of angled fish. Nippon Suisan Gakkaishi, 45, 667-671 (1979) (in Japanese).
19) G. Kawamura: Fundamental study on application of the vision of spotted mackerel Pneumatophorus tapeinocephlus (Bleeker) to angling techniques-V, Discussion on the light intensity of fish lamp. Nippon Suisan Gakkaishi 45, 1237-1240 (1979) (in Japanese).
20) J. Soeda: Studies on the ecology and the breeding habits of the squid Ommastrephes sloani pacificus Steenstrup. Bull. Hokkaido Reg. Fish. Res. Lab., 14, 1-24 (1956).
21) E. C. Flores: Studies on the maintenance and behavior of the Japanese common squid Todarodes pacificus Steenstrup in relation to fishing. Ph. D. thesis, University of Hokkaido, Hakodate, 1979, p. 166.

Date of correction: June 30, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

The power of fishing lights has increased in Japanese squid jigging boats due to vessel competition rather than a proper understanding of the physiology and behavior of the target species. The movement of the black pigment in the outer segment of squid retina is related to exposure time and light intensity. Using the retinomotor response as an index of their retinal adaptation to the light, tank experiments and jigging operations were conducted to examine the relationship between fishing light intensity, the jigging layer depth and time of capture of Japanese common squid Todarodes pacificus. The tank experiments revealed that the retinal adaptation is not correlated with exposure time and intensity, because the iris functions to shield their retina from the rapid increase of light level.The results of jigging operations, however, indicated that their retinal adaptation is correlated with their diel vertical migration. It is suggested that, under the powerful lighting boats, the squid find and seize jigs in the low illuminance area in which the squid can adjust their vision reasonably depending on their retinal adaptation state. On basis of these results, the proper use of fishing lights for squid jigging is discussed.

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