International Journal of Marine Science 2016, Vol.6, No.45, 1-7
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Table – 2 Regression of different morphometric characters on total length
and head length in cm (X)
Characters
Regression
Equation
R
Standard error
R
2
Fork length
Y=0.11+0.87 X
0.993
0.131
0.985
Standard
Y=0.17+0.81 X
0.996
0.093
0.991
Body depth
Y=0.032+0.27X
0.977
0.074
0.954
Head length
Y=0.99+0.23 X
0.930
0.103
0.865
Length of 1
st
dorsal fin
Y=0.082+0.13X
0.944
0.054
0.891
Length of 2
nd
dorsal fin
Y=0.10+0.11 X
0.943
0.047
0.889
Length of caudal peduncle
Y=0.38+0.21 X
0.960
0.076
0.921
Pre-orbital length
Y=-0.16+0.48 X
0.927
0.055
0.858
Eye diameter
Y=-0.034+0.31X
0.836
0.057
0.699
Inter-orbital length
Y=-0.19+0.27 X
0.851
0.047
0.724
The meristic characteristics of the
A. japonicum
recorded as dorsal spines 9 with no variation, dorsal soft rays 10,
with no variation; anal spines 3 followed by 7 soft rays without any variation.
The length-weight relationship for males, females and pooled was found to be, and respectively. The coefficient of
determination for male, female and combined found to be
respectively. The coefficient of determination for male, female and combined
found to be 0.7163, 0.7227 and 0.7747 respectively, indicating that only 72%, 72% and 77% of variation in weight
is explained by the total length in respect of male, female and combined.
The species found to be mainly feeding upon the items like juveniles of the shrimp acetus and occasionally on
detritus.
As evident from the literature, there is practically no information available on maturation and spawning of the
species from Indian waters and in the present study also enough specimens of the species could not be studied to
understand the spawning of the species. Noboru et al., (2005) in Japan waters observed that precocity and short
life span is notable because it is a higher consumer that is generally expected to show later maturation and longer life.
The females were found dominate the males in all the size groups, with an aggregate sex ratio 1.3:1.
Acknowledgement
The Authors are grateful to the Director General, Fishery Survey of India for encouragement. The authors also wish to express
sincere thanks to Shri D.K. Gulati, Zonal Director FSI, and Kochi for the help in statistical analysis. The help rendered by Shri N.
Jagannadh, Junior Fisheries Scientist is also acknowledged. The skippers and crew of the survey vessels MFV., Matsya Jeevan, MFV.
Samudrika and Matsya Nireekshani are highly appreciated for their co-operation during data collection.
Reference
Anon., 1983, FAO Species identification sheets for fishery purposes, Western Indian Ocean (Fishing area 51), Vol.I
Acharya P., and Dwivedi S.N., 1984, A Study of Morphometric relationship and age and growth of
Upeneussulphureus,
Cuvier of the Bombay Coast Proc. Indian
National Science Academy, 50(3): 310-316
Chondar S.L., 1974, Morphometric Characteristics and their relationship in Gudusia Chapra (Harm) Proc. National Science Academy, 80 (2): 51-67
Dwivedi S.N., and Menezes E.R., 1974, A note on the morphology and ecology of
Brachiunlus orientalis
(Bloch &Schn) estuaries of Goa, Geobios, 1: 80-83
Gulati D., and Acharya P., 2001, Study on the morphometric and meristic characteristic of splendid Silver belly (
leiognathussplendens (Cuvier)
from Bombay
Coast, Journal of Indian Fisheries Association, 28: 37-45
Laevastu T., 1965, Manual of Methods in fisheries fascicules, FAO, 1-10
