Abstract
Twelve species of bryozoans occur in the fouling communities at Visakhapatnam Harbour, of which the encrusting cheilostome-Electra bengalensis (Stoliczka) is by far the most common. The horizontal distribution of bryozoans at four selected stations in the harbour is recorded. Quantitative data on the seasonal abundance and settlingrates ofE. bengalensis and some of the prevailing hydrographical conditions, i.e. temperature, salinity and turbidity data, are given for one year (December 1966 to November 1967). The observations indicate thatE. bengalensts is a continuous breeder and also a fast growing species. The influence of temperature and salinity on its breeding and abundance is discussed.
While only 12 species of bryozoans occur in the harbour, the number of species occurring in the nearby foreshore localities at Visakhapatnam ranges from 20 to 34. The effect of some factors (pollution, salinity, silting larval type and fouling) which may influence the distribution of bryozoans is discussed.
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References
Allen P B and Wood B J P 1950 Investigations in underwater fouling;Aust, J. Mar. Freshwater Res. 1 92–105
Antony Raja B T 1959 Studies on the distribution and succession of sedentary organisms of the Madras harbour;J. Mar. Bioi. Assoc. (India) 1 180–197
Banta W C 1969aWatersipora arcuata, a new species in theSubovoidea-cucullata-nigra complex (Bryozoa, Cheilostomata);Bull. South Calif. Acad. Sci. 68 96–102
Banta W C 1969b The recent introduction ofWatersipora arcuata Banta (Bryozoa, Cheilostomata) as a fouling pest in Southern California;Bull. South Calif. Acad. Sci. 68 248–251
Becker G 1958FAO Report No 795 Project Ind/FAO: 1–112
Carrada G C Sacchi C F and Rigillo M T 1965 Ricerche sulla Valenza ecologica dei briozoi salmastri, 1. Significato delle variazioni ritmiche dei fattori ambientali;Estrato del Bollettino di pesca, Piscicolturae eidrobiologia. Ann. 4120 153–208
Cook P L 1968 Bryozoa (Polyzoa) from the coasts of Tropical West Africa;Atl. Rep. 10 115–262
Corlett J 1948 Rates of settlement and growth of the ‘pile fauna’ of the Mersey Estuary;Proc, Liverpool Bioi. Soc. 56 2–28
Daniel A 1954 The seasonal variations and the succession of the fouling communities in the Madras harbour waters;J. Madras Univ,24 189–212
Dobson J G 1946 The Control of Fouling Organisms in Fresh and Salt-Water Circuits;Trans. Am. Soc. Mech. Eng. 68 247–265
Ganapati P N, Lakshmana Rao M V and Nagabhushanam R 1958 Biology offouling in the Visakhapatnam harbour;Andhra Univ, Mem. Oceanogr, Ser. 622 193–209
Ganapati P N and Rao T S S 1959 Some remarks on the Bay of Bengal;J. Mar. Bioi. Assoc. India 1 224–227
Ganapati P N and Satyanarayana Rao K 1968 Fouling Bryozoans in Visakhapatnam harbour;Curro Sci. 37 81–83
Ganapati P N and Raman A V 1973 Pollution in Visakhapatnam harbour;Curro Sci. 42 490–492
Gopalakrishnan V and Kelkar V V 1958 A note on very heavy fouling of copper sheathed hulls of naval craft at Bombay;J. Bombay Nat. Hist. Soc. 55 588–590
Haderlie B C 1969 Marine fouling and boring organisms in Monterey harbour 2. Second Year of Investigation;Veliger 12 182–192
Iyengar R S, Gopalakrishnan V and Kelkar V V 1957 Studies on Marine fouling organisms in Bombay harbour;Def. Sci. J. 7 123–139
Karande A A 1968 Studies on marine fouling and boring organisms in Bombay harbour;Def. Res. Dev. Org. Rep. India pp 1–20
Maturo F J S Jr 1959 Seasonal distribution and settling rates of estuarine Bryozoa;Ecology 40 116–127
Maturo F J S Jr 1968 The distributional pattern of the Bryozoa of the East coast of the United States exclusive of New England;Atti. Soc. Ital. Sci. Nat. 108 261–284
Mawatari S 1953 OnElectra angulata Levinsen, one of the fouling bryozoans in Japan;Misc. Rep. Res. Inst, Nat. Resour, Tokyo 32 5–10
Menon N R 1971 Ecology of fouling bryozoans in Cochin Waters;Mar. Biol. 8 280–307
Nair N B 1961 Some observations on the distribution of Bryozoans in the Fjords of Western Norway;Sarsia 3 37–45
Nair N B 1962 Ecology of marine fouling and wood-boring organisms of Western Norway;Sarsia 8 1–88
Nair N U 1967 The settlement and growth of major fouling organisms in Cochin harbour;Hydrobtolosia 30 503–512
Orton J H 1920 Sea-temperature, breeding and distribution in marine animals;J. Mar. Bioi. Assoc. UK 12 339–366
Paul M D 1942 Studies on the growth and breeding of eertain sedentary organisms in the Madras harbour;Proc, Indian Acad, Sci. B15 1–42
Powell N A 1970Schizoporella unicornis-An alien bryozoan introduced into the Strait of Georgia;J. Fish. Res. Bd. Can. 27 1847–1853
Powell N A, Sayee C S and Tufts D F 1970 Hyperplasia in an estuarine bryozoan attributable to coaltar derivatives;J. Fish. Res. Bd. Can. 27 2095–2096
Powell N A 1971 The marine bryozoa near the Panama Canal;Bull. Mar. Sci. 21 766–778
Purushotham A and Satyanarayana Rao K 1971 The first progress report of the Committee of the protection of Timber against marine organisms attack in the Indian Coastal waters for the period 1953–70;J. Timb. Dev, Assoc. India 17 1–139
Rao B S 1964 Studies on marine fouling organisms tolerent to low salinity and copper at Bombay harbour;IndianJ. Tech. 2 142–146
Robertson A 1921 Report on a collection of Bryozoa from the Bay of Bengal and other eastern seas;Rec. Indian Mus. 22 33–65
Ryland J S 1970Bryozoans (London: Hutchinson Univ. Lib.) pp 1–175
Ryland J S 1971 Bryozoa (Polyzoa) and marine fouling. inMarine borers, fungi and fouling organisms of woodeds G Jones and S K Eltringham.Orgn. Econ. Co-op. Dev, (Proc. OECD Workshop Portsmouth 1968) 137–154
Santhakumaran L N and Pillai S R M 1970 Marine foulers in Bombay waters: Barnacles and Polyzoans, Annual Day Souvenir, Central Inst, of Fisheries Education 32–34
Satyanarayana Rao K 1975 The systematics and some aspects of the ecology of littoral bryozoa on the north-east coast of India, Ph.D. thesis, Andhra University
Semper K 1883 Animal Life;Inter. Sci. Ser, London 1–428
Skerman T M 1960 The recent establishment of the polyzoan,Watersipora cucullata (Busk) in Auckland Harbour, New ZealandN. Z. J. Sci. 3 615–619
Stoliczka F 1869 On the anatomy ofSagartia scilleriana andMembranipora bengalensis; J. Asiat. Soc. Bengal38 228–63
Wisely B 1959 Factors influencing the settling of the principal marine fouling organisms in Sydney Harbour;Aust, J. Mar. Freshwater Res. 10 30–44
Woods Hole Oceanographic Institution 1952 Marine fouling and its prevention annapolis United States Naval Institute pp 1–388
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Forms a part of Ph. D. thesis submitted to the Andhra University, Waltair.
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Satyanarayana Rao, K., Ganapati, P.N. Ecology of fouling bryozoans at Visakhapatnam harbour. Proc. Indian Acad. Sci (Animal Sciences) 87, 63–75 (1978). https://doi.org/10.1007/BF03179003
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DOI: https://doi.org/10.1007/BF03179003