THE BTO1,OOY Oh‘ PEIA(*IC SHRIMPS IN THE OCEAN
307
close relationship between the life of the shrimps and periodical
fluctuntioiis of the Kuroshio Current.
Pasiphaea, R I ) . is exploited in I’oyama Bay, the Sea of Japan,
from April to November from depths of 50-200 m on the steep slope
at the edge of canyons. The CittchCs tbmount to 200-500 tons a year
recently arid they are often cwnsuiiied as a substitute for Bergia
lucens.
Today, Heveriil countries arc. attcvnpting the exploitation of the
great resources of the Antarotic 10. 111 ~‘zcphcczcsiu swperba. A t present,
howovcr, thew tire two nitlin diffioultieu in its utilization. One is the
techniqw of the fishing, and another is the technique for processing
it into food. So far as the Japanese investigations are concerned, the
fishing techniqrio htis not been sufiiciently developed to meet the
economic ciumand. We have to find out more about the basic biology
of the sp:ies, particnlarly its mobility and swarming behaviour.
Mtkuchline mid Ii’isher’s (1069) comprchensive study of euphtlusiids
reveccled a life hintory similar in many aspects to that of sergestids.
The modi fictktiort and improvement of the harvesting method of
Bergia 1ucrrLq mug solve the technical problems of the euphausiid
fishery. The incat of Euphazcsia is very soluble in water at higher
temperatures, and ifs flavour, pit,rticularly that of the adolescents, is
no better than thaC of the decapod shrimps. It is probably difficult
to serve Ewphaz~fsiu for human consumption as u similar type of product
to 8ergia and Aceteu.
Certainly Acetea forms the inujor sourct! of protein for some of the
local peoples in the Indo-west-Pacific. Biologictcl studies of the species
of AcetPa sliould be carried out more extensively. Compared with the
numerous workars studying the cwpht~iisiitis, the number of RcientiRtH
interested in Aceks is too few. A t the Name time more attention munt be
paid to the potential of pelagic shrimps as a comtnercial fishery resource.
The ritilization of shrimps living u t a depth of 300 m or more a t night
crtnnot be expected, tts vast exploitable swarms have not been discovered. However, the increase in havic information on the biology
m d ecology of pelagic shrimps will lead not only to the improvement of
the present fisheries but also to the finding of unexploited stocks.
Suitilble fisliiiig grounds may be found and someday they will contribute
to the world fishrry.
Them is ti possibility of developing a fishery for the enormous
stock of ASergesfrs ~imilz‘a in the northeastern Pacific (Omori et nl., 1972).
PreliIninary estimates indicate that the amount of these shrimps eaten
l)y fin and wi whtiles in the southern ( h l f of Alaska reaches about
140 000 tons in t h six rnont’hn of the sojourn of the wtialcs in that xea
307
close relationship between the life of the shrimps and periodical
fluctuntioiis of the Kuroshio Current.
Pasiphaea, R I ) . is exploited in I’oyama Bay, the Sea of Japan,
from April to November from depths of 50-200 m on the steep slope
at the edge of canyons. The CittchCs tbmount to 200-500 tons a year
recently arid they are often cwnsuiiied as a substitute for Bergia
lucens.
Today, Heveriil countries arc. attcvnpting the exploitation of the
great resources of the Antarotic 10. 111 ~‘zcphcczcsiu swperba. A t present,
howovcr, thew tire two nitlin diffioultieu in its utilization. One is the
techniqw of the fishing, and another is the technique for processing
it into food. So far as the Japanese investigations are concerned, the
fishing techniqrio htis not been sufiiciently developed to meet the
economic ciumand. We have to find out more about the basic biology
of the sp:ies, particnlarly its mobility and swarming behaviour.
Mtkuchline mid Ii’isher’s (1069) comprchensive study of euphtlusiids
reveccled a life hintory similar in many aspects to that of sergestids.
The modi fictktiort and improvement of the harvesting method of
Bergia 1ucrrLq mug solve the technical problems of the euphausiid
fishery. The incat of Euphazcsia is very soluble in water at higher
temperatures, and ifs flavour, pit,rticularly that of the adolescents, is
no better than thaC of the decapod shrimps. It is probably difficult
to serve Ewphaz~fsiu for human consumption as u similar type of product
to 8ergia and Aceteu.
Certainly Acetea forms the inujor sourct! of protein for some of the
local peoples in the Indo-west-Pacific. Biologictcl studies of the species
of AcetPa sliould be carried out more extensively. Compared with the
numerous workars studying the cwpht~iisiitis, the number of RcientiRtH
interested in Aceks is too few. A t the Name time more attention munt be
paid to the potential of pelagic shrimps as a comtnercial fishery resource.
The ritilization of shrimps living u t a depth of 300 m or more a t night
crtnnot be expected, tts vast exploitable swarms have not been discovered. However, the increase in havic information on the biology
m d ecology of pelagic shrimps will lead not only to the improvement of
the present fisheries but also to the finding of unexploited stocks.
Suitilble fisliiiig grounds may be found and someday they will contribute
to the world fishrry.
Them is ti possibility of developing a fishery for the enormous
stock of ASergesfrs ~imilz‘a in the northeastern Pacific (Omori et nl., 1972).
PreliIninary estimates indicate that the amount of these shrimps eaten
l)y fin and wi whtiles in the southern ( h l f of Alaska reaches about
140 000 tons in t h six rnont’hn of the sojourn of the wtialcs in that xea