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Bottom Trawl Surveys - Proceedings of a Workshop Held at Ottawa ...

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226<br />

Tableau 5 - Pourcentage cumul<strong>at</strong>tf d'abondance par fitage selon les p§riodes du jour {1980).<br />

Heure: 00:00 06:00 10:00<br />

06:00 10:00 12:00<br />

Etage:<br />

v 6,4% 5,7% 9,3%<br />

IV 8,9% 10,3% 18,1%<br />

III 8,0% 14,4% 28,2%<br />

I I 7,0% 16,0% 30,3%<br />

I 4,7% 11,7% 14,1%<br />

Chalut YANKEE 41<br />

2,5 m<br />

15,7% 34,9% 58,5%<br />

CONCLUSION<br />

Les result<strong>at</strong>s obtenus ne peuvent etre<br />

consideres que comme partiels, puisqu'il est<br />

bien connu que l'ampleur de la migr<strong>at</strong>ion<br />

verticale de Pandalus borealis, varie en<br />

fonction du temps de l'ann§e {Carlsson et al .,<br />

1978, Smidt, 1978). Cette particularit§<br />

necessite que des essais de peche soient<br />

effectues avec 1 'echantillonneur vertical fitage<br />

a difffirentes periodes de l'annfie, si 1 'on veut<br />

estimer la vulnerabilite de l'espece dans le<br />

temps.<br />

REFERENCES<br />

Alverson, D.L. and W.T. Pereyra (1969}.<br />

Demersal Fish Explor<strong>at</strong>ions in the North<br />

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Explor<strong>at</strong>ory Fishing Methods and Analytical<br />

Approaches to-Stock Size and Yield Forecasts.<br />

J. Fish. Res. Bd. Canada 26: 1985-2001.<br />

Axelsen F., J. Frechette etc. Tremblay {1979}.<br />

Donnees sur la Crevette (Pandalus borealis) au<br />

1 arge du Labrador. CAFSAC, Res. ·Doc. No 4:<br />

1-33.<br />

Barr, L. and R. McBride (1967). Surface-tobottom<br />

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No 560: 7 p.<br />

Beardsley, A.J. (1973}. Design and Evalu<strong>at</strong>ion<br />

<strong>of</strong> a Sampler for Measuring the Near-bottom<br />

Vertical Distribution <strong>of</strong> Pink Shrimp, Pandalus<br />

jordani. Fish. Bull., 71 (1}: 243-253.<br />

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1977 and Previous Years. ICNAF Sel. Papers.<br />

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12:00 14:00 16:00 18:00 20:00<br />

14:00 16:00 18:00 20:00 24:00<br />

9,1% 6,3% 9,1% 10,2% 2,5%<br />

15,8% 12,4% 14,5% 13,5% 3,8%<br />

23 '7% 20,7% 16,0% 17,9% 4,0%<br />

29,7% 25,9% 17,0% 11,8% 3,8%<br />

18,9% 17,2% 11,6% 5,0% 2,9%<br />

60,4% 53,4% 36,6% 25,7% 8,7%<br />

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and A.G. Walker (1969}. D<strong>at</strong>a on the<br />

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Otter <strong>Trawl</strong>s. Fish. Res. Bd. Canada. Tech.<br />

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des stocks de crevettes, Pandalus borealis,<br />

dans le nord-ouest du Golfe du Saint-Laurent<br />

et dans le chenal d' Anticosti. CAFSAC v/orking<br />

Paper, No 23: 1-24.<br />

Fr§chette, J. and H. Oupouy (1979). Preliminary<br />

Biological D<strong>at</strong>a on the Shrimp Stocks <strong>of</strong> Davis<br />

Strait. NAFO SCR DOC., 79/X1/8: 1-15.<br />

High, W.L., I.E. Ellis et C.D. Lusz {1969}. A<br />

progress Report on the Development <strong>of</strong> a Shrimp<br />

<strong>Trawl</strong> to Separ<strong>at</strong>e Shrimp From Fish and <strong>Bottom</strong>­<br />

Dwelling Animals. Comml Fish. Rev. 31{3):<br />

20-33.<br />

Pearcy, W.G. (1970). Vertical migr<strong>at</strong>ion <strong>of</strong> the<br />

ocean shrimp, Pandalus jordani: A Feeding and<br />

Dispersal Mechanism. Cal. Fish and Game 56:<br />

125-129.<br />

Smidt, E. {1978}. Diurnal Vari<strong>at</strong>ion in Shrimp<br />

C<strong>at</strong>ches on the Offshore Grounds in ICNAF<br />

Divisions 1B and 1C. ICNAF Sel. Papers. No 4:<br />

45-46.<br />

Tobey, A. et J. Rycr<strong>of</strong>t {1978}. Mise au point<br />

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du Saint-Laurent. Service des Peches et de la<br />

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