FISHERIES AND MARINE SERVICE

Translation Series No.3266

Growth of the sea scallop Mizuhopecten yessoensis in submerged cages

by E.A. Belogrudov

Original title: Rost morskogo grebeshka Mizuhopecten yessoensis v sadkakh

From: Izvestiva Tikhookeanskogo Nauchno-Issledovatel'skogo Instituta Rybnogo Khozyaistva i Okeanografii (TINRO) (Proceedings of the Pacific Scientific Research Institute of Marine Fisheries and Oceanography), 87(N.A.) : 127-129, 1973

Translated by the Translation Bureau(LHM) Multilingual Services Division

Department of the Secretary of State of Canada

Department of the Environment Fisheries and Marine Service

Biological Station, St. John's, Nfld. Pacific Biological Station, Nanaimo, B.C.

Marine Ecology Laboratory, Dartmouth, N.S.

1974

4 pages typescript

DEPARTMENT OF THE SECRETARY OF STATE

MULTILINGUAL SERVICES

TRANSLATION BUREAU 'Pete' 12iee CANADA

DIVISION MULTILINGUES

SECRÉTARIAT D'ÉTAT

BUREAU DES TRADUCTIONS

DIVISION DES SERVICES

INTO - EN TRANSLATED FROM - TRADUCTION DE

Russian English

PLACE OF PUBLICATION

LIEU DE PUBLICATION

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Fee

AUTHOR - AUTEUR

E. A. Belogrudov

TITLE IN ENGLISH - TITRE ANGLAIS

Growth of the Sea Scallop Mizuhopecten yessoensis in Submerged Cages

TITLE IN FOREIGN LANGUAGE (TRANSLITERATE FOREIGN CHARACTERS) TITRE EN LANGUE ÉTRANGÉRE (TRANSCRIRE EN CARACTLRES ROMAINS)

Rost morskogo grebeshka Mizuhopecten yessoensis v sadkakh

REFERENCE IN FOREIGN LANGUAGE (NAME OF BOOK OR PUBLICATION) IN FULL. TRANSLITERATE FOREIGN CHARACTERS.

RÉFÉRENCE El LANGUE ÉTRANGÉRE (NOM DU LIVRE OU PUBLICATION), AU COMPLET, TRANSCRIRE EN CARACli* RES ROMAINS.

Izvestiya Tikhookeanskogo nauchno-issledovatel l skogo instituta rybnogo khozyaistva i okeanografii (TINRO)

REFERENCE IN ENGLISH - RÉFÉRENCE EN ANGLAIS

Proceedings of the Pacific Scientific Research Institute of Fisheries and Oceanography (TINRO)

PUBLISHER - ÉDITEUR

Not given

PAGE NUMBERS IN ORIGINAL

NUMÉROS DES PAGES DANS

L'ORIGINAL

127 - 129

DATE OF PUBLICATION DATE DE PUBLICATION

YEAR ANNÉE

VOLUME ISSUE NO.

NUMÉRO NUMBER OF TYPED PAGES

NOMBRE DE PAGES DACTYLOGRAPHIÉES

4

676650

LEM

N.A.

REQUESTING DEPARTMENT ' Environment MMSTÉRE-CLIENT NOTRE DOSSIER NO

BRANCH OR DIVISION DIRECTION OU DIVISION TRADUCTEUR (INITIALES)

Mr. M. C. Mercer, Biological Station, St. John's, Nfld.

YOUR NUMBER VOTRE DOSSIER N 0

Sept. 26, 1974.

805.200-1 0-6 (REV. 2/68) 7630-21-02g-6333

1973 87

TRANSLATION BUREAU NO.

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PERSON REQUESTING DEMANDÉ PAR TilAHSLATION

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'DEPARYMENT OF THE SECRETARY OF STATE

TRANSLATION BUREAU

MULTILINGUAL SERVICES

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SECRETARIAT D'ÉTAT

BUREAU DES TRADUCTIONS

DIVISION DES SERVICES

MULTILINGUES

CLIENT'S NO. DEPARTMENT DIVISION/BRANCH CITY

NO DU CLIENT MINISTRE . D.IVIS•ION/DIRECTION VILLE

Fisheries Service,676650 Environment

Biological Station, St. John's

BUREAU NO. LANGUAGE TRANSLATOR(INITIALS)

NO DU BUREAU LANGUE TRADUCTEUR (INITIALES)

...,.,?^, 1974676650 Russian LBM

Izvestiya Tikhookeanskogo nauchno-issledovatel`sko o instituta rybnogo

khozyaistva i okeanografii (TINRO) (Proceedings of the Pacific Scientific

^?Research Institute 'of Fisheries and Oceanography), ^9+^t7^3^a f,`Qr^^^

pp. 127-129. (USSR).

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Growth of the Sea Scallop Mizuhopecten yessoensis in Submerged Cages

by E. A. Belogrudov

For a number of years, TINRO has been doing work on the artificial 127*

breeding and commercial raising of sea scallop& The basic problem in the

raising of sea scallops in cages is obtaining.maximum production. To

achieve this, it is essential to determine the most productive regions of a

water area and the layers of water in which scallops grow more quickly than

in natural conditions. To that end, in 1970, experimental work was begun on

gathering of pelagic larvae with the aid of collecting devices, transplanting

of the young and raising of the scallops in cages in Minonosok Bay (Poset

Gulf, Sea of Japan).

The scallop young were taken from the collecting devices and placed

in cages measuring 0.16 m2 that consist of a frame 40 cm square of 7 mm

steel rod, enclosed in No. 7 bolting cloth. In all, 6 cages were made, and

* Numbers in the right-hand margin are those of pages in the originaL - Trans.

SOS-200-10-31

7y30-,^.1•020•5332

2

10 identical scallops (shell height - 8 mm) were placed in each. The cages were

tied together in a string and put out in water 10.5 m deep at the following

levels: 0.5, 2, 4, 6, 8 and 10 m. A weight was tied to last cage to keep

the string in a vertical position. The cages were raised once a month during

the period from August through October, and the scallops in them were measured

and weighed. The bar charts in figure 1 show that the scallop young grew

unevenly both in each cage at a single level and at different levels as well.

Variation in the growth rates of bivalve molluscs living under identical

conditions is a characteristic trait of many species.

An analysis of data obtained in terms of periods showed that in August

the greatest growth of young was observed in the 2 - 8 layer, while in

September - October, it occurred in the 4 - 8 m layer. In August, the greater

part of the young measured 1.9 - 2.3 cm; in September, 2.5 - 2.9 cm, and in

October, 3.3 - 3.8 cm.

The sharp fluctuations in temperature produced by wave agitation

continually have an unfavorable effect on the growth of scallop young at

the top (0.5 - 2 m) level. During heavy storms, the mixing extends to great

depths (fig. 2). Over the whole length of the observation period, it was

established that the growth of scallop young in the top (to 2 m) and bottom

(0.5 - 1 m from the bottom) layers is retarded. The causes of the quickening

or slowing down of growth of scallop young at various levels will be studied

in future.

3

128

45 *0 1,3 1,1 .3lBeicoma OXOBUHbI c,^^

0 .9.9

Shetl ^ergh-k, 'cm.Pnc. 1. Pocr ^toao^tt rpc6ctiu<a q ca;iKax 1970 r.tta ray6ttxe; A -0,5 .Ni; 13 -- 12 -,t; 13 -- -1 Ni;l' - 6 at; lZ - 8 at; E- 10 +t. I-- •anrycr,

2 - cetsraGph, 3 - oxrsi6p^.

Fig. 1. Growth of young scallops in cages in 1970, at a depth of:

A-0.5m; B-2nt; C - 4 m; D - 6 m; E - 8 m; F - 10 m.

1 - August, 2 - September, 3 - October.

t°

1110/1¢ OreâYeel .TULY ,q

Tem•eparypa BOabi na paanbix r.ny6n-max 4yx. M1111011000M 1970 r.

Me « Pnc. 2.

24.

20

16

12

Fig. 2. Water temperature at various depths in Minonosok Bay in 1970.