CHAPTER - IV (Contd.)

3.2 Correlation between the Abundance of Major Shrimps and Salinity and Rainfall.

The relationship between the abundance of four major shrimps at Chakaria, Khepupara and Satkhira and the salinity and rainfall are depicted in the figures 7a & 7b.

In the observation it was found that Metapenaeus monoceros at Chakaria & Satkhira are inversely correlated with salinity and a positive relationship was observed with the rainfall regime of the areas. It was also noted that salinity was negetively correlated with rainfall of the three study area. However, no significant relationship was observed among other three shrimp species and the salinity and rainfall of the areas.

FIG. - 1 SHOWING MONTHLY AVERAGE ABUNDANCE OF ZOOPLANTON AT CHAKARIA, KHEPUPARA AND SATKHIRA

FIG - 2 SHOWING RELATIVE ABUNDANCE OF SHRIMP, FISH AND OTHER ZOOPLANKTON AT CHAKARIA, KHEPUPARA AND SATKHIRA

FIG - 3 SHOWING MONTHLY AVERAGE ABUNDANCE OF SHRIMP LARVAE AT CHAKARIA, KHEPUPARA AND SATKHIRA

FIG - 4 SHOWING MONTHLY TOTAL ZOOPLANKTON AT CHAKARIA, KHEPUPARA AND SATKHIRA

FIG - 5 SHOWING MONTHLY DISTRIBUTION OF SHRIMPS AND FIN-FISH LARVAE AT CHAKARIA KHEPUPARA AND SATKHIRA

FIG - 6 SHOWING MONTHLY ABUNDANCE OF FOUR MAJOR PENAEID SHRIMPS AT CHAKARIA, KHEPUPARA AND SATKHIRA

FIG - 7a. SHOWING RELATIONSHIP BETWEEN MAJOR SHRIMPS (Penaeus indicus, P. monodon) AND SALINITY & RAINFALL AT CHAKARIA, KHEPUPARA AND SATKHIRA.

FIG - 7b. SHOWING RELATIONSHIP BETWEEN MAJOR SHRIMPS (Metapenoeus monoceros, M. brevicornis) AND SALINITY 8 RAINFALL AT CHAKARIA, KHEPUPARA AND SATKHIRA.

TABLE 14 : SHOWING MONTHLY OCCURRENCE OF DIFFERENT ZOOPLANKTON PER CUBIC METER OF WATER AT CHAKARIA.

YEAR	1982								1983								TOTAL ORGANISMS	AVERAGE	%
MONTH	MAY	JUNE	JULY	AUGUST	SEPT.	OCTOBER	NOV.	DEC.	JANUARY	FEB	MAR.	APRIL	MAY	JUNE	JULY	AUG.		AVERAGE
ORGMS	MAY	JUNE	JULY	AUGUST	SEPT.	OCTOBER	NOV.	DEC.	JANUARY	FEB	MAR.	APRIL	MAY	JUNE	JULY	AUG.		ORG/M³
COELENTERATES
Jelly Fish	0	0	0.037	0.016	0	13.169	3.416	15.534	31.820	1.360	23.987	1.109	40.73	0.025	0.025	0	131.228	8.202	1.961
ANNELIDS
Polychaetes	0	0	0	0	0	0	0	0.004	0	0	0	0	0	0	0	0	0.004	0.0003	0.00007
CHAETOGNATHS	18.227	12.705	3.961	0.627	0	13.716	38.561	3.83	2.154	0.44	25.962	62.61	45.767	7.372	0.392	0	236.324	14.770	3.531
CRUSTACEANS
Copepods	460.132	70.239	79.349	150.413	64.34	133.524	17.477	55.210	65.344	101.782	161.233	171.294	198.9785	255.163	225.579	256.856	2466.9135	154.182	36.864
Isopods	0	0	0	0	0	0	0	0	0.044	0	0	0	0.156	0	35.929	16.705	52.834	3.3021	0.7895
Amphipods	0	0	0	0.012	2.221	54.310	0.996	0.806	0.796	11.259	6.248	25.65	16.20	1.541	26.041	35.853	181.933	11.371	2.719
Mysids	72.849	450.045	523.91	92.835	37.495	55.312	78.219	134.055	39.179	21.386	2.928	149.05	312.38	193.357	543.165	380.075	3086.24	192.89	46.119
LuciferSp.	22.935	33.227	59.169	3.263	0.076	2.021	2.918	9.092	0.433	1.685	1.948	0.395	6.453	7.737	16.784	0.43	168.566	10.535	2.519
Squillasp.	0.203	1.854	0	0	0	0.016	2.83	2.897	0.256	0.180	0.302	1.458	2.184	0.179	0	0	12.359	0.772	0.185
Crab larvae	0	1.819	14.993	2.350	1.952	0.271	3.353	1.251	1.169	50.023	0.432	1.377	0.455	0.182	7.350	4.589	91.566	5.723	1.368
Limulus sp.	0	0	0	0	0	0	0	0	0	0	0	0.006	0	0	0	0	0.006	0.0004	0.0001
Penaeid shrimps	1.4915	4.784	26.8075	1.3975	1.8665	0.2445	0.291	0.039	0.26	0.7935	0.29	0.948	0.414	0.871	9.1865	11.838	61.5225	3.845	0.919
Caridean prawns	0.8335	0.101	0.465	0.5825	0.679	1.0285	0.731	0.26	0.2055	0.1275	0.144	0.538	0.4405	0.153	0.1555	0.877	7.3225	0.458	0.1095
Alpheid shrimps	2.64	0.191	0	0.012	0	0.002	0.186	0.013	0	0.009	0.019	0.614	0.978	0.663	0.016	0	5.343	0.334	0.08
Acetes sp.	2.52	1.078	2.964	0.958	0	1.531	4.404	0.038	0.019	0.09	1.147	4.587	2.238	0	0	0	21.574	1.3484	0.322
MOLLUSCS	0	0	3.307	0.062	0.049	0	0.003	0.183	0.052	0.001	0.006	0	0	0	0	0.2	3.863	0.2414	0.058
ECHINODERMS
Star fish larvae	0	0	0	0	0	0	0	0	0	0	0.03	0	0	0	0	0	0.03	0.002	0.0005
FINFISH LARVAE	1.107	3.0815	10.205	1.724	2.171	3.312	1.246	0.4785	0.263	0.864	2.15	5.816	10.858	8.995	16.43	28.835	97.536	6.096	1.4575
OTHER ZOOPLANKTON	23.731	14.231	4.144	1.354	3.134	6.015	0.305	0.097	2.798	7.963	0.277	2.453	0.002	0	0.30	0	66.804	4.175	0.998
ORG/M³	606.669	593.3555	729.311	255.606	113.9835	284.472	154.936	223.788	44.792	197.963	227.103	427.905	638.234	476.238	881.353	736.2585	6691.968	418.248
%	9.066	8.867	10.898	3.820	1.703	4.251	2.315	3.344	2.164	2.958	3.394	6.394	9.537	7.117	13.170	11.002			100.0

TABLE 15 : SHOWING MONTHLY OCCURRENCE OF DIFFERENT ZOOPLANKTON PER CUBIC OF WATER AT KHEPUPARA.

YEAR	1982					1983								TOTAL ORGANISM	AVERAGE	%
MONTH	AUG.	SEPT.	OCT.	NOV.	DEC.	JAN.	FEB.	MARCH	APRIL	MAY	JUNE	JULY	AUG.	TOTAL ORGANISM	AVERAGE
ORGM.	AUG.	SEPT.	OCT.	NOV.	DEC.	JAN.	FEB.	MARCH	APRIL	MAY	JUNE	JULY	AUG.		ORG/M³
COELENTERATES
Jelly fish	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
ANNELIDS
Polychaetes	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
CHAETOGNATHS	0.021	0	0	17.4	13.184	221.273	65.644	192.154	51.296	100.4975	0.474	0.001	0	661.9445	50.919	40.489
CRUSTACEANS
Copepods	0	0.484	0	145.303	6.918	13.923	44.84	32.304	157.544	234.3675	3.457	0.0075	0	639.15	49.165	39.094
Isopods	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Amphipods	0.222	7.489	0	0.02	0.06	12.759	5.963	4.7075	0.924	0	0.5475	2.2075	0.897	35.7965	2.754	2.190
Mysids	5.165	12.31	5.92	11.694	7.429	9.102	9.534	15.494	4.852	1.301	3.449	5.805	1.254	93.309	7.178	5.708
Lucifer sp.	0.615	0.374	0	0.595	3.165	0.681	0.053	6.026	0	0.0075	5.196	0.496	0	17.2085	1.324	1.053
Squilla sp.	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Crab larvae	0.543	5.075	1.283	2.17	4.895	27.689	11.599	19.934	6.169	0.9375	0.251	1.4675	2.234	84.247	6.4805	5.153
Limulus sp.	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Penaeid shrimp	0.051	0.102	0.180	1.901	0.246	0.853	0.418	0.167	0.251	0.225	0.178	0.014	0.2615	4.755	0.367	0.292
Caridean prawns	0.259	1.67	0.266	1.384	0.362	0.01	0.028	0.263	0.025	0.474	1.166	1.516	1.886	9.309	0.716	0.569
Alpheid	0	0	0	0.015		0	0	0	0	0	0	0	0	0.015	0.001	0.001
shrimp
Acetes sp.	0.945	0	3.22	8.011	1.179	1.615	0.803	5.705	7.802	12.14	4.53	0	0	45.95	3.535	2.811
MOLLUSCS	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
ECHINODERM
Starfish larvae	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
FINFISH LARVAE	0.254	7.09	3.032	7.516	0.915	3.412	2.157	0.8635	0.516	1.4463	0.385	0.7525	2.1575	30.497	2.346	1.865
OTHER ZOOPLANKTON	0	0.07	1.783	0.461	1.113	1.404	1.425	5.249	0.278	0.725	0.0925	0	0.084	12.6845	0.976	0.776
ORG/M³	8.075	34.664	15.612	196.470	39.466	292.72	142.464	282.8675	229.657	352.121	19.728	12.267	8.774	1634.8865	125.7605
%	0.494	2.12	0.955	12.02	2.414	17.905	8.714	17.302	14.047	21.538	1.207	0.75	0.537			100.0

TABLE 16 : SHOWING MONTHLY OCCURRENCE OF DIFFERENT ZOOPLANKTON PER CUBIC METRE OF WATER AT SATKHIRA.

YEAR																TOTAL ORGANISMS	AVERAGE	%
MON.	JUNE	JULY	AUG.	SEPT.	OCTOBER	NOV.	DEC.	JAN.	FEB.	MAR.	APR.	MAY	JUNE	JULY	AUGUST.		AVERAGE
ORG.	JUNE	JULY	AUG.	SEPT.	OCTOBER	NOV.	DEC.	JAN.	FEB.	MAR.	APR.	MAY	JUNE	JULY	AUGUST.		ORG./M³
COELENTERATES
Jelly fish	0	0	0	0	0	0.106	0	0	0	0	0	0	0	4.45	0	4.56	0.304	0.098
ANNELIDS
Polychaetes	0.007	0	0	0	0.038	0.085	0	0.304	0.069	0.007	0.015	0.062	0	0.507	0.058	1.152	0.077	0.025
CHAETOGNATHS	7.631	5.183	8.978	0.329	0.095	0.034	1.077	2.318	2.295	17.229	8.756	4.183	4.286	6.812	0.092	69.29	4.62	1.49
CRUSTACEANS
Copepods	61.858	18.671	365.645	9.972	3.338	8.205	66.146	74.303	23.285	55.176	31.708	3.738	41.494	16.66	1.924	782.12	52.14	16.83
Isopods	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Amphipods	4.8995	0	0	6.496	6.727	3.745	13.502	2.709	0.547	20.935	58.189	17.722	28.734	12.356	36.785	213.35	14.22	4.59
Mysids	695.561	185.734	453.934	176.944	35.06	7.505	135.081	43.902	4.946	45.759	271.767	112.06	300.807	47.566	421.889	2938.5	195.9	63.23
Lucifer sp.	0	0	0	0.168	0.437	0.264	0	0.003	0	0	0	0	0	0	0.515	1.39	0.09	0.029
Squilla sp.	0	0	0	0	0	0	0	0	0	0.026	0	0	0	0	0	0.026	0.002	0.0006
Crab larvae	10.386	0.311	25.885	1.192	1.215	0.148	0.359	0.335	0.229	0.394	0.285	0.181	2.883	105.168	25.724	174.75	11.65	3.76
Limulus sp.	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Panaeid shrimps	11.37	8.43	1.03	0.686	1.581	0.486	0.796	1.06	0.359	0.502	2.345	0.74	2.123	10.106	0.986	42.6	2.84	0.92
Caridean prawns	5.36	0.813	0.474	1.99	1.746	1.067	0.938	0.45	0.156	0.17	0.625	0.291	1.77	2.052	3.0	20.83	1.39	0.45
Alpheid shrimp	0.006	0.033	0.008	0.002	0.014	0.025	0.793	0.603	0.063	0.117	0.348	0.107	0.188	0.079	0.044	2.43	0.162	0.05
Acetes sp.	24.096	12.195	4.975	4.219	2.493	7.552	22.159	4.903	1.287	1.441	6.131	3.497	3.936	18.615	4.50	121.99	8.13	2.62
MOLLUSCS	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
ECHINODERMS
Star-fish	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
FINFISH LARVAE	4.28	1.014	3.938	2.038	1.514	2.438	0.652	0.466	0.323	7.0	8.34	0.809	3.08	1.74	1.828	39.46	2.63	0.85
OTHER ZOOPLANKTON	198.221	27.326	9.613	0	0	0	0	0	0	0	0	0	0	0	0	235.16	15.68	5.06
TOTAL	1023.67	259.71	874.48	204.04	54.258	31.66	241.503	131.35	33.554	148.75	388.51	143.39	389.23	226.11	497.39	4647.61	309.84
PERCENTAGE	22.026	5.59	18.816	4.39	1.17	0.68	5.196	2.83	0.72	3.2	8.36	3.08	8.37	4.86	10.7			100.00

TABLE 17 : SHOWING MONTHLY AVERAGE DISTRIBUTION AND PERCENTAGE COMPOSITION OF SHRIMPS, FISHES AND OTHER ORGANISMS AT CHAKARIA.

MONTH	Shrimp	Fish	Other Zooplankton	Total	%
MAY (1982)	2.325	1.107	603.237	606.669	9.066
JUNE	4.885	3.0815	585.389	593.3555	8.867
JULY	27.2725	10.205	691.8335	729.311	10.898
AUG	1.98	1.724	251.902	255.606	3.820
SEPT	2.5455	2.171	109.267	113.9835	1.703
OCT	1.273	3.312	279.887	284.472	4.251
NOV	1.022	1.246	152.668	154.936	2.315
DEC	0.30	0.4785	223.0095	223.788	3.344
JAN (1983)	0.4655	0.263	144.0635	144.792	2.164
FEB	0.921	0.864	196.178	197.963	2.958
MAR	0.434	2.15	224.519	227.103	3.394
APR	1.486	5.816	420.63	427.905	6.394
MAY	1.268	10.858	626.108	638.2	9.537
JUNE	1.024	8.995	466.219	476.238	7.117
JULY	9.342	16.430	885.581	881.353	13.170
AUG	12.715	28.835	694.7085	736.2585	11.002
ORG./M³	4.3285	6.096	407.8235	418.248	100.00
%	1.035	1.456	97.508	99.999

TABLE 18 : SHOWING MONTHLY AVERAGE DISTRIBUTION AND PERCENTAGE COMPOSITION OF SHRIMPS, FISHES AND OTHER ORGANISMS AT KHEPUPARA.

MONTH	Shrimp	Fish	Other Zooplankton	Total	%
AUG (1982)	0.313	0.254	7.511	8.078	0.494
SEPT	1.77	7.09	25.79	34.65	2.119
OCT	0.374	3.032	12.206	15.612	0.955
NOV	3.316	7.516	185.702	196.534	12.017
DEC	0.605	0.915	38.441	39.961	2.44
JAN (1983)	0.86	3.412	288.446	292.718	17.899
FEB	0.444	2.157	139.862	142.463	8.711
MAR	0.429	0.8635	281.575	282.8675	17.296
APR	0.2765	0.5155	228.865	229.657	14.04
MAY	0.699	1.4463	350.226	352.121	21.531
JUNE	1.344	0.385	17.999	19.728	1.21
JULY	1.53	0.7525	9.985	12.267	0.75
AUG	2.1475	2.1575	4.469	8.774	0.536
TOTAL ORG./M³	1.085	2.346	122.371	125.802	99.99
%	0.862	1.865	97.273	100.0

TABLE 19 : SHOWING MONTHLY AVERAGE DISTRIBUTION AND PERCENTAGE COMPOSITION OF SHRIMPS, FISHES AND OTHER ORGANISMS AT SATKHIRA.

MONTH	Shrimp	Fish	Other Zooplankton	Total	%
JUNE (1982)	16.73	4.28	1002.66	1023.67	22.026
JULY	9.248	1.014	249.444	259.71	5.59
AUG	1.505	3.938	869.03	874.48	18.816
SEPT	2.674	2.038	199.327	204.04	4.39
OCT	3.33	1.514	49.414	54.258	1.17
NOV	1.329	2.438	27.89	31.66	0.68
DEC (1983)	1.683	0.652	239.167	241.502	5.196
JAN	1.568	0.466	129.318	131.35	2.83
FEB	0.519	0.323	32.712	33.554	0.72
MAR	0.673	7.0	141.08	148.75	3.2
APR	2.97	8.34	377.198	388.51	8.36
MAY	1.03	0.809	141.548	143.39	3.08
JUNE	3.82	3.08	382.334	389.23	8.37
JULY	12.199	1.74	212.17	226.11	4.86
AUG	3.986	1.828	491.579	497.39	10.7
TOTAL ORG./M³	4.22	2.631	302.99	309.84
%	1.36	0.85	97.79	99.999	99.99

TABLE 20 : SHOWING MONTHLY DISTRIBUTION OF MAJOR PENAEID SHRIMPS/M³ AT CHAKARIA.

MON.	MAY (1982)	JUNE	JULY	AUG	SEPT	OCT	NOV	DEC	JAN (1983)	FEB	MAR	APR	MAY	JUNE	JULY	AUG	AVERAGE
SPECIES
Penaeus monodon	0.4265	4.026	21.7285	0.1745	0.1935	0.018	0.004	0	0.007	0.2105	0.0745	0.1725	0.08	0.157	0.009	0.0315	1.707
P. indicus	0.04	0.4555	0.221	0.405	0.0115	0.029	0.082	0	0	0.028	0.0735	0.016	0.134	0.037	0.1875	0	0.107
Metapenaeus monoceros	0.569	0.182	4.8435	0.798	1.595	0.1915	0.163	0.034	0.0035	0.182	0.068	0.5085	0.1955	0.4405	0.2555	8.6615	1.168
M. brevicornis	0	0.005	0	0.0135	0.009	0.006	0.028	0	0	0.261	0.0575	0.0235	0	0.03	0.479	1.971	0.180

TABLE 21 : SHOWING MONTHLY DISTRIBUTION OF MAJOR PENAEID SHRIMPS/M³ AT KHEPUPARA.

MONTH	AUG (1982)	SEPT	OCT	NOV	DEC	JAN (1983)	FEB	MAR	APR	MAY	JUNE	JULY	AUG	AVERAGE
SPECIES
Penaeus monodon	0.004	0.035	0.0018	0.609	0.048	0.4305	0.385	0.119	0.0385	0.0715	0.0125	0	0	0.135
P. indicus	0.0325	0.0213	0	0	0.001	0	0	0	0	0	0	0	0	0.004
Metapenaeus monoceros	0.014	0	0	0	0.001	0	0.001	0	0	0	0.005	0	0	0.002
M. brevicornis	0	0	0	0	0	0	0	0	0	0	0	0	0	0