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Table 4. Total catch and tilapia yield (in tonnes) in some reservoirs of Tamilnadu. Krishnagiri Vaigai Tihipia Upper Dam Total Tilapia Total Tirumoorthy Total Tilapia Bhavanisagar Total Tilapia Tilapia Year Amaravathy Total Tilapia Total 77-78 97.79 85.99 -ND- -ND- 14.34 11.54 -ND- -ND- (87.93) (80.47) 78-79 145.71 139.97 -ND- -ND- 5.15 4.53 29.30 12.37 -ND- (95.86) (87.96) (42.22) 79-80 49.61 41.04 -ND- -ND- 5.77 3.91 120.35 87.24 -ND- (82.73) (68.76) (7 2.49) 80-81 73.88 62.35 26.78 Nil 321.20 Nil 5.56 3.80 50.20 32.50 -ND- (88.45) (68.34) (64.74) 81-82 160.39 147.18 4.83 Nil 267.60 Nil 5.56 3.92 56.5 15.50 -ND- (91.76) (70.50) (27.3 9) 82-83 124.79 105.78 41.04 Nil 300.35 2.16 15.08 5.10 50.05 20.21 30.35 1.15 (84.77) (0.72) (33.82) (40.38) (3.79) 83-84 80.60 64.00 15.93 Nil 57.80 Nil 10.80 3.50 6.38 0.39 45.79 1.26 (79.40) (32.40) (6.11) (2.75) 84-85 427.00 341.60 -ND-- 175.67 24.27 5.80 1.25 10.90 4.31 34.42 1.21 (80.00) (13.82) (21.55) (39.54) (3.52) 85-86 20.88 10.35 -ND- 134.00 18.46 12.27 1.50 5.22 2.29 48.06 1.63 (49.57) (13.78) (12.22) (43.87) (3.39) 86-87 -ND- -ND- 133.49 20.16 -ND- 15.24 8.19 50.05 10.47 (15.10) (53.74) (20.92) 87-88 36.57 8.41 26.48 1.16 67.76 12.92 23.41 1.26 12.56 3.01 41.59 5.41 (22.99) (4.38) (19.07) (0.05) (23.96) (13.01) (Source: Sreenivasan, pers. comm.); ND - No data; Figures within parentheses indicate percentage contribution to total catch.
52 Larvicidal Fish The poeciliid Lebistes reticulatus was introduced for mosquito control. It is reported that one more species of larvicidal fish, Notobranchus sp. has also been introduced (Sreenivasan et al. 1988). However, these fish have not been widely employed for the purpose they were introduced. On the other hand, Gambusia affinis is known to adversely affect the fishery of other fishes by preying on their spawn. In Ooty Lake, this fish severely affected the mirror carp fishery and only after its eradication, the mirror carp fishery could be reestablished. Ornamental Fish A large number of ornamental fish, consisting of both egg layers and live bearer;, have been introduced into the country over the years. Baskar et al. (1988) have reported the presence of 261 species of exotic egg layers in India. However, they contribute about 25% to the country's export trade, which is dominated by the domestic egg layers. Subramanian et al. (1988) listd a total of 27 exotic live bearers in India. A number of different strains are reported to exist within these. <strong>Exotic</strong> aquarium fishes are considered important from the view point of developing export and domestic trades. Molluscs Mytilopsis sallei This exotic bivalve, which is native to Central American region, appears to have been brought into Indian waters through ship fouling in the late 1960s. It has become a major fouling pest, gaining almost monospecific dominance in fouling communities, with a biornass build up of to 100-120 kg/m-2/yr. This bivalve is also seen in large numbers in Kakinada harbour, but only to a small extent in Bombay Harbour. It appears highly probable that this fouling organism will pose a serious problem in the country (Rao et al. 1988). <strong>Aquatic</strong> Plants Over the last century, several aquatic plants have been introduced into the couniry, but a full list of these is not readily available. However, only a few of them are of importance from a fisheries point of view in that they have proved harmful. Foremost among them is the water hyacinth (Eichhornia crassipes), which was reportedly brought from Australia for its flowers. This fast growing weed has become the single biggest menace in fishery waters and navigation channels. Even though effective mechanical and chemical methods for eradication of this weed are known and also practised off and on, failure to take suitable follow-up measures has invariably led to reinfestation. Its growth is particularly pronounced in waters receivLng domestic sewage. Recent experiments have shown the possibility of biological control of this weed using the insect Neochitina eichhorniae (Jayanth 1987). Some recent studies have indicated the possibility of useful utilization of this obnoxious weed, such as in bio-gas production (Joglekar and Sonar 1986), and fish feed (Anil et al. 1986).
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Exotic Aquatic Organisms in Asia /
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Exotic Aquatic Organisms in Asia Pr
Page 5 and 6:
The Introduction of Exotic Aquatic
Page 7 and 8:
Introduction This special publicati
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help to promote national awareness
Page 11 and 12: Conditions in Europe and North Amer
Page 13 and 14: 2 taken as the basis for the introd
Page 15 and 16: 4 with respect to other introductio
Page 17 and 18: 6 Costa-Pierce, B. 1988. Study miss
Page 19 and 20: 8 extinction of the endemic rainbow
Page 21 and 22: 10 bottom substrates by European ca
Page 23 and 24: 12 Arthington 1988; Lloyd 1987); G.
Page 25 and 26: 14 Apparent Extinction of the Lake
Page 27 and 28: 16 successful and more often than n
Page 29 and 30: 18 Reznick, D. 1981. 'Grandfather E
Page 31 and 32: 20 -24° 4' 4 - I- .300 Cl) '1 S 36
Page 33 and 34: 22 The terminology associated with
Page 35 and 36: 24 Table 2. Translocations of indig
Page 37 and 38: 26 MELANOTAENIIDAE Melanotaenia spl
Page 39 and 40: 28 ELEOTRIDAE - GUDGEONS Hypseleotr
Page 41 and 42: 30 POECILIIDAE - LIVEBEARERS Gambus
Page 43 and 44: 32 References Allen, G.R. 1982. A F
Page 45 and 46: 34 Robinson, S.E. 1982. The ecology
Page 47 and 48: 36 1973. It has been cultured in so
Page 49 and 50: 38 northern Japan, settled off Dali
Page 51 and 52: 40 Table 1. The exotic aquatic food
Page 53 and 54: 42 Table 2. The preliminary list of
Page 56 and 57: Impact of Exotic Aquatic Species in
Page 58 and 59: Table 1. Salinonids introduced into
Page 60 and 61: Grass carp The grass carp, Ctenopha
Page 64 and 65: Salvinia molesta, a floating fern o
Page 66: Joy, PJ., K.R. Sathesan and D. Jose
Page 69 and 70: 58 Table 1. Introduced aquatic spec
Page 71 and 72: 60 The 1940s The Inland Fisheries D
Page 73 and 74: 62 Indonesia includes three differe
Page 75 and 76: 64 information on the status of fau
Page 77 and 78: 66 Table 1. List of exotic aquatic
Page 79 and 80: 68 Table 1. Continued Taxonomic Sta
Page 81 and 82: 70 From this historical review, it
Page 83 and 84: 72 what they perceived as economica
Page 85 and 86: 74 Table 1. Fate of the introduced
Page 87 and 88: 76 While it is likely that at the o
Page 89 and 90: 78 Pearl Spot The pearl spot, Etrop
Page 91 and 92: 80 Trengganu Enactment No. 8 of 196
Page 93 and 94: 82 References Annual Fisheries Stat
Page 95 and 96: 84 long time ago as shown by the fa
Page 97 and 98: 86 Discussion and Recommendations E
Page 99 and 100: Table 1. Exotic aquatic species int
Page 101 and 102: Table 1. Continued Diseases/Parasit
Page 103 and 104: 92 Fisheries (Piranhas) Rules 1971,
Page 105 and 106: 94 (Caranx ignobilis) golden treval
Page 107 and 108: 96 Table 1. Main species of aquariu
Page 110 and 111: Status of Introduced Species in Sri
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Exotic Aquatic Species in Taiwan I-
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appreciated in the context of the w
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However, A. anguilla cannot tolerat
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Today, most of these carps are poly
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Caiman latirostris and Alligator mi
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Conclusions The case of the tilapia
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Table 1. Continued Culture Status P
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Table 2. Record of tilapia introduc
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Annex I. Continued Dascyllus melamu
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Exotic Aquatic Species in Thailand
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Present Status of the Exotic Specie
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Table 1 a. Exotic fishes introduced
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Australian Government Position: Int
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There are presently eight State or
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egulate any activity likely to have
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Appendix II. Continued Name State o
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Recommendations of the Workshop 1.0
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(two more to be co-opted) was appoi
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Mr. J. Maclean, do ICLARM, MC P0 Bo
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Appendix I Definitions of Exotics T
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Appendix II Assessment of the Impac
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Table All.3. Assessment of the stat
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Table All.6. Assessment table of th
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Table All.8. Assessment table of th
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Table All.10. Continued Family/Spec
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Table Affi. Indigenous species whic
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Appendix V Existing Legislation or
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TITLES IN THE ASIAN FISHERIES SOCIE
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