HÜSEYİN ÖZBİLGİN, H.Tuncay KINACIGİL, T. Akın İLKYAZ

Dip trol ağlarında balık davranışları

Trolün yalnızca çekildiği suyun hacmini örnekleyen basit bir mekanik süzgeç olmadığı artık yaygın olarak bilinmektedir. Balıklar, irilik ve türlerine özgü davranışlarıyla ağın çeşitli parçalarının sunduğu uyarılara tepki gösterirler. Bu uyarıları değiştirerek, hem balıkçılar hem de bilim adamları ağların etkinliklerini ve seçiciliklerini değiştirebilirler. Bu makale, sürütme avcılığıyla ilişkili olan balık davranışlarının daha iyi anlaşılabilmesi amacıyla kullanılan sualtı gözlem tekniklerinin gelişimini özetlemekte ve trol ağlarının etki alanı içindeki genel balık davranışlarını tanımlamaktadır.

Anahtar Kelimeler:

balık avlama, balık avlama ekipmanı, hayvan davranışları

Fish behaviour in relation to bottom trawling

It is now well established that a trawl net does not simply act as a mechanical sieve, sampling only the volume of the water through which it is towed. A given fish, reacts according to its size and species specific behaviour to stimuli presented by various components of the gear. Both fishermen and scientist can alter the efficiency and the selectivity of the trawls by altering these stimuli. This paper reviews the evolution of the under-water observation techniques which has been used in improving the understanding of fish behaviour in relation to towed fishing gear operation and describes the usual behavioural patterns of fish in the vicinity of the trawl gear.

Keywords:

fishing, fishing gear, animal behaviour,

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Anonim,1963. ‘Selectivity of fishing gears’. ICNAF Special publication No5: 1-225.

Anonim,1953. ‘Fish and Seine Net’. 16mm cine film. Available. FRS, Marine Laboratory, PO Box 101, Aberdeen, UK.

Anonim,1995. Fisheries and Plankton Acoustics. ICES Mar. Sci. Symp. Vol. 202. Academic Press.

Beamish,F.W.H.,1966. Swimming endurance of some Northwest Atlantic fishes. J. Fish. Res. Board Canada, 23: 341-347.

Beamish,F.W.H.,1967. In ‘Fish Behaviour in relation to Fishing Gear and Tactics’. Paper No. E125:1-111. FAO, Rome.

Blaxter,J.H.S.,Parrish,B.B.,Dickson,W.,1964. In ‘Modern Fishing Gear of the World’. Vol. 2:529-536. Fishing News Books Ltd, London.

Bone,Q.,1966. On the function of two types of myotomal muscle fibre in elosmobranch fish. J. Mar. Ass. U.K. 46: 321-349.

Chapman,C.J.,1973. Field studies of hearing in Teleost fish. Helgolander wissenschaftliche Meeresuntersuchungen, 24: 371-390.

Glass,C.W.,Wardle,C.S.,1989. Comparison of the reactions of fish to a trawl gear, at high and low light intensities. Fisheries Research, 7: 249-266.

Glass,C.W.,Wardle,C.S.,1995. Studies on the use of visual stimuli to control fish escapes from cod-ends. II. The effect of a black tunnel on the reaction behaviour of fish in otter trawl cod-ends. Fisheries Research, 23: 165-174.

Godo,O.R.,1994. Factors affecting the reliability of ground fish abundance estimates from bottom trawl surveys. In ‘Marine Fish Behaviour in Capture and Abundance estimation’ Fishing News Books Ltd. pp. 169-199.

Gosden,S.J.,1994. Laboratory studies on fish vision and behaviour in relation to the principles underlying mesh penetration in trawled fishing gears. PhD. Thesis, University of Aberdeen, UK.

Hall,S.J.,Wardle,C.S.,MacLennan,D.N.,1986. Predator evasion in a fish school, test of a model for the fountain effect. Mar. Biol., 91: 143-148.

Hawkins,A.D.,1973. The sensitivity of fish to sound. Oceanography and Marine Biology - An Annual Review, 11: 291-340.

Hemmings,C.C.,1966. Factors influencing the visibility of objects under-water. In Light as an ecological factor. Ed. by Bainbridge, R. British Ecological Symposium, No. 6: 359-374.

Main,J.,Sangster,G.I.,1978. The value of direct observation techniques by divers in fishing gear research. Scott. Fish. Res. Rep., 12/78, 15pp.

Margetts,A.R.,1949. Rapp. P.-V. Reun. Cons. Perm. Int. Explor. Mer.. 125: 72-81.

Margetts,A.R.,1952. ‘Trawls in action’. 16mm cine film. Available. MAFF Fisheries Laboratory, Lowestoft, UK. Özbilgin,H.,1996. Variation in the haddock length/girth relationship and its effect on codend retention. ICES C.M.1996/B:19.

Özbilgin,H.,1998. The seasonal variation of trawl codend selectivity and role of learning in mesh penetration behaviour of fish. PhD Thesis. University of Aberdeen, UK.

Özbilgin,H., Ferro,R.S.T., Robertson,J.H.B., Hutcheon,J.R., Kynoch,R.J., Holtrop,G., 1996. Seasonal variation in codend selectivity of haddock. ICES C.M.1996/B:18.

Özbilgin,H., Wardle,C.S., 2002. Effect of seasonal temperature changes on the escape behaviour of haddock, Melanogrammus aeglefinus, from the codend. Fisheries Research, 58(3): 323-331.

Parrish,B.B.,1949. Rapp. P.-V. Reun. Cons. Perm. Int. Explor. Mer. 125: 91-96.

Parrish,B.B.,1951. Fishing capacities of Lowestoft and Aberdeen trawls when used on flatfish grounds. J. du Cons., 17: 156-171.

Thomson,D.,1969. ‘The seine net: its origin, evolution and use’, pp.192. Fishing News Books Ltd, London.

Urquhart,G.G.,Stewart,P.A.M.,1993. A review of techniques for the observation of fish behaviour in the sea. ICES Mar. Sci. Symp., 196: 135-139.

Wardle,C.S.,1977. Effect of size on the swimming speed of the fish. In ‘Scale effects in animal locomotion’. Edited by Pedley, T. J. Academic Press, London, Pp. 299-313.

Wardle,C.S.,1983. Fish reaction to towed fishing gears. In ‘Experimental Biology at Sea’, Eds. A. G. MacDonald and I. G. Priede (Academic Press), Pp 167-195.

Wardle,C.S.,1987. Investigating the behaviour of fish during capture. In ‘Developments in Fisheries Research in Scotland’, ed. R.S. Bailey and B.B. Parrish, Pp 139-155.

Wardle,C.S.,1989. Understanding fish behaviour can lead to more selective fishing gears. In ‘Proceedings, World Symposium on Fishing Gear and Fishing Vessel Design, 1988’, (The Newfoundland and Labrador Institute of Fisheries and Marine Technology, St. Johns, Canada), Pp 12-18.

Wardle,C.S.,1993. Fish behaviour and fishing gears. In ‘Behaviour of Teleost Fishes’, ed. T. J. Pitcher (Croom Helm, London and Sydney), Second Edition, Pp 463-495.

Wardle,C.S.,Videler,J.J.,1980. Fish swimming. In ‘Aspects of animal movement’. Edited by Elder, H. Y. and Trueman, E. R. Cambridge university press. Pp. 125-150.

Wardle,C.S.,He,P.,1996. Fish Behaviour near trawls-Recent Advances. In ‘Proceedings of the workshop on Co-operation Research in Asian Fishing Technology (CRAFT)’. (Inoue et al., Editors) Publ. Nat. Res. Inst. Of Fish. Eng. Hasaki, Japan, March 1996, No. 2, Pp. 35-44.

Watson,J.W.,1989. Fish behaviour and trawl design: potential for selective trawl development. In ‘Proceedings, World Symposium on Fishing Gear and Fishing Vessel Design, 1988’ (The Newfoundland and Labrador Institute of Fisheries and Marine Technology, St. Johns, Canada), Pp. 25-29.

Wood,H.,1956. In ‘Sea Fisheries: their investigations in the United Kingdom’. Ed., M. Graham, pp.10-79. Edward Arnold, London.