306
MAKOTO O M O M
is reported from the waters of' t8he Malay Peninsula and Singapore
(Pathansiili, lWi6). The amount, of their cat)ch in the West' Malaysia
attirineci fi 700 tons in 1971; dmnt 12% of the total shrimp catch
there. hi Penang, Miiliiysia, the fishing of Acetes continues throughout
the year, tinct tho catch is highest from May to September. Conversely.
according to Tharn (1 950, I955), the catch is nearly restricted during
the northeast nionsoon (December to March) off Singapore. Acetes
rrythraeus, A . japonicus (as A . dispw), A . serrulatus and A . vulgaris
are found, anti during the southwest monsoon they appear only
spordiciilly in catches of the fish t'raps which are set farther out to sea.
Aceles i?uiiau.u is caught commercially along the Maharashtra comt,
western North Indin, throughout the year, but the best landings
arc obti~iiieti from December to Monh (Kunju, 1967). These data, and
the report by ,Jones (1967), suggest that the annual landing of
Acctps attaius 9 000-1 0 000 tons and constitutes about 1 I-] 776 of the
total crustacean ciitch off the Indian coast. A . erythraeus and A .
ser.rulatus two important in the fishery along the Madras and Kerala
coast, (Joncs. 1!)67).
111 general, the fishing of Acetes spp. i
w characterized by a fishing
season rcstricted to it few months of the year in many localities and by
catches wliioh fluctuate greatly year by year. Tnsufficient explanation
has bwn given for these phenomena. Ikematsu (1 957) suggested that
the tlnnual yield of A . japonic?c,s seemed to be correlated with the air
tcmpivatJiire in .June, the heaviest spawning season, and also with the
catch of fish uaici crustaceans which feed on Acetes. Jn the tropical
regions, there cippeured to exist some close relationships between the
wind direction and the occurrence of the species in neritic waters.
A fishery for Sergia lucenv has becw conducted in Suruga Hay since
1894. Fishing is carried out by haul nets at night when the shrimps
come up into shallow water. The net is t)owcd by two vessels, 15 to 20
times a night. and at presrnt 120 vessels are engaged in this fishery.
The nurnbcr of fishing days in recent years is about 50 to 80 dayti per
year. Tho ttnnual catch of this shrimp totals 3 800 to 7 COO tons (more
than 3 000 000 US dollars in landed value), and it constitutes about
lOcy0 of tlx ttnnual catch of (111 shrimps in Japan. The greater part of
the catrh is sold as dried shrimp. Considering the size of the catch
from this small bay, this fishery is one of the most productive resoiirces
in the K~iroshio region (Omori et ul., 1973). As described previously,
the temperature during the early breeding season has a great influence
on the fluctuation in the abundance of A' . lucens. Warm years bring
good catchcs m d cold years poor catches. Omori (1969a) stated that
poor fishing years appear every 9 to 10 years, indicating that there is a
MAKOTO O M O M
is reported from the waters of' t8he Malay Peninsula and Singapore
(Pathansiili, lWi6). The amount, of their cat)ch in the West' Malaysia
attirineci fi 700 tons in 1971; dmnt 12% of the total shrimp catch
there. hi Penang, Miiliiysia, the fishing of Acetes continues throughout
the year, tinct tho catch is highest from May to September. Conversely.
according to Tharn (1 950, I955), the catch is nearly restricted during
the northeast nionsoon (December to March) off Singapore. Acetes
rrythraeus, A . japonicus (as A . dispw), A . serrulatus and A . vulgaris
are found, anti during the southwest monsoon they appear only
spordiciilly in catches of the fish t'raps which are set farther out to sea.
Aceles i?uiiau.u is caught commercially along the Maharashtra comt,
western North Indin, throughout the year, but the best landings
arc obti~iiieti from December to Monh (Kunju, 1967). These data, and
the report by ,Jones (1967), suggest that the annual landing of
Acctps attaius 9 000-1 0 000 tons and constitutes about 1 I-] 776 of the
total crustacean ciitch off the Indian coast. A . erythraeus and A .
ser.rulatus two important in the fishery along the Madras and Kerala
coast, (Joncs. 1!)67).
111 general, the fishing of Acetes spp. i
w characterized by a fishing
season rcstricted to it few months of the year in many localities and by
catches wliioh fluctuate greatly year by year. Tnsufficient explanation
has bwn given for these phenomena. Ikematsu (1 957) suggested that
the tlnnual yield of A . japonic?c,s seemed to be correlated with the air
tcmpivatJiire in .June, the heaviest spawning season, and also with the
catch of fish uaici crustaceans which feed on Acetes. Jn the tropical
regions, there cippeured to exist some close relationships between the
wind direction and the occurrence of the species in neritic waters.
A fishery for Sergia lucenv has becw conducted in Suruga Hay since
1894. Fishing is carried out by haul nets at night when the shrimps
come up into shallow water. The net is t)owcd by two vessels, 15 to 20
times a night. and at presrnt 120 vessels are engaged in this fishery.
The nurnbcr of fishing days in recent years is about 50 to 80 dayti per
year. Tho ttnnual catch of this shrimp totals 3 800 to 7 COO tons (more
than 3 000 000 US dollars in landed value), and it constitutes about
lOcy0 of tlx ttnnual catch of (111 shrimps in Japan. The greater part of
the catrh is sold as dried shrimp. Considering the size of the catch
from this small bay, this fishery is one of the most productive resoiirces
in the K~iroshio region (Omori et ul., 1973). As described previously,
the temperature during the early breeding season has a great influence
on the fluctuation in the abundance of A' . lucens. Warm years bring
good catchcs m d cold years poor catches. Omori (1969a) stated that
poor fishing years appear every 9 to 10 years, indicating that there is a