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Pahwa, D.V. & S.N. Mehrotra 1966 Observations on fluctuations in the abundance of plankton in relation to certain hydrological conditions of River Ganga. Proceedings of the National Academy of Sciences of India, Section B, Biological Sciences
Volume: (B)36(2): 157-189, figs. 1-10, tabs. 1-3, Map 1.
 
Bannister, J.L. & A. De C. Baker 1967 Observations on food and feeding of baleen whales at Durban. Norsk Hvalfangsttid.
Volume: 56(4):78-82. (vii/viii-1967)
 
Tasawar, Z., K. Umer & C.S. Hayat 2007 Observations on lernaeid parasites of Catla catla from a fish hatchery, Muzaffargarh, Pakistan. Pakistan Veterinary Journal
Volume: 27:17-19.
 
Tasawar, Z. & R. Naseem 1999 Observations on lernaeid parasites of Ctenopharyngodon idella. Acta Scientia
Volume: 9:33-38.
 
Ali, M.D. 1985 Observations on lernaeosis and gyrodactylosis in carp fingerlings raised in ponds. Journal of Biological Sciences Research, Baghdad
Volume: 16(1):125-132, fig. 1, tabs. 1-3. (i-1985, English with Arab summary.)
 
Nichols, K.C. 1975 Observations on lesser-known flatworms: Udonella. International Journal for Parasitology
Volume: 5(5):475-482.
 
Ritchie, G., A.J. Mordue, A.W. Pike & G.H. Rae 1996 Observations on mating and reproductive behaviour of Lepeophtheirus salmonis, Kroyer (Copepoda: Caligidae). Journal of Experimental Marine Biology and Ecology
Volume: 201(1-2): 285-298.
 
Penston, M.J., M.A. McKibben, D.W. Hay & P.A. Gillibrand 2004 Observations on open-water densities of sea lice larvae in Loch Shieldaig, Western Scotland. Aquaculture Research
Volume: 35(8):793-805.
 
Huq, M.B., M. Srinivasan & M. Murugan 2006 Observations on parasites of Epinephelus malabaricus (Bloch and Schneider). Indian Journal of Fisheries
Volume: 53(4): 459-461.
 
Prah, S.K. 1969 Observations on parasitic infection in freshwater fishes of Ghana. In: Obeng, L.E. (ed.). Man-made lakes: the Accra Symposium. Accra
Volume: :261-268, figs. 1-2, tabs. 1-3.
 
Grabda, J. 1972 Observations on penetration of Lernaeolophus sultanus (Milne Edwards, 1840) (Lernaeoceridae) in organs of Pneumatophorus colias (Gmelin, 1788). Acta Ichthyologica et Piscatoria, Szczecin
Volume: 2(1):115-125, figs. 1-10.
 
Leentvaar, P. 1958 Observations on plankton of some inland waters, especially 'wielen', in the Netherlands. Beaufortia
Volume: 6(73):171-197, figs. 1-16. (20-i-1958)
Wilson: paper
Drago, A., A.F. Perez de Talens & E. Onesto 1971 Observations on Sapphirinides. Pubbl. Staz. zool. Napoli
Volume: 37: 415-420, figs. 1-2. (20-v-1971).
 
Brenton-Davie, V. & H. Kreiberg 1999 Observations on sealice in Atlantic salmon raised in a sea system floating bag and a conventional netpen. Bulletin of the Aquaculture Association of Canada
Volume: 99(4):22-24.
 
Mbahinzireki, G.B. 1980 Observations on some common parasites of Bagrus docmac Forskahl (Pisces: Siluroidea) of Lake Victoria. Hydrobiologia
Volume: 75(3):273-280.
 
Payne, A.I.L. 1986 Observations on some conspicuous parasites of the southern African kingklip Genypterus capensis. South African Journal of Marine Science
Volume: 4:163-168.
 
Scott, T. 1907 Observations on some Copepoda that live as messmates or commensals with ascidians. Transactions of the Edinburgh Field Naturalists and Microscopical Society
Volume: Sess.1906-7:357-372.
Wilson: paper
Johri, V.K., S.K. Awasthi, S.R. Sharma & N.K. Tandon 1989 Observations on some limnological aspects of four important lakes of Kumaon Hills of U.P. and suggestions for their proper exploitation. Indian Journal of Fisheries
Volume: 36(1):19-27.
 
Lowe, C.W. 1936 Observations on some Pacific diatoms as the food of copepods and fishes. Journal of the Biological Board of Canada
Volume: 3:12-19. (xi/xii-1936)
 
Scott, T. 1905 Observations on some parasites of fishes new or rare in Scottish waters. Report of the Fishery Board for Scotland
Volume: 23(3):108-119, pls. 5-6.
Wilson: paper
Goswami, S.C. 1974 Observations on some planktonic groups of Kavaratti Atoll (Laccadives). Proceedings of the Indian National Science Academy, Part B, Biological Sciences
Volume: 39:676-686, figs. 1-7, tab. 1. (20-viii-1974)
 
Pilarczyk, K. & B. Brandys 1980 Observations on Species Composition and Population Dynamics of Crustaceans in Ponds. Prace Nauk. Uniw. Slask. Katowicach
Volume: 375: 221-236, figs. (Polish with English and Russian Summaries).
 
Hicks, G.R.F. 1977 Observations on substrate preference of marine phytal harpacticoids (Copepoda). Hydrobiologia
Volume: 56(1):7-9, tab. 1. (29-ix-1977)
Wilson: paper
Gotto, R.V. 1981 Observations on Synaptiphilus tridens, an ecto-associate of holothurians. In: Vaupel Klein, J.C. von (ed.). First International Conference on Copepoda, Amsterdam, 24-28 August 1981. Collected Abstracts.
Volume: :25. (Abstract.)
Wilson: paper
Rogers, J.H. 1978 Observations on the Lernaea epizootics of a Central California lake. M.S. Thesis, California Polytechnic State University, San Luis Obispo, California, U.S.A.
No Volume Data Available
 
Lillie, D.G. 1910 Observations on the anatomy and general biology of some members of the larger Cetacea. Proceedings of the Zoological Society of London
Volume: 1910(2):769-792, figs. 69-78, pl. 74. (24-v-1910)
 
MacDonald, J.D. 1853 Observations on the anatomy in a small species of Crustacean. Proceedings of the Royal Society of London
Volume: 6:295-296. Also in Ann. Mag. Nat. Hist.11:488-489.
 
M'Donald, J.D. 1853 Observations on the anatomy of the antennae in a small species of crustacean. Annals and Magazine of Natural History
Volume: (2)11(66):488-489. (vi-1853)
 
M'Donald, J.D. 1853 Observations on the anatomy of the antennae in a small species of crustacean. Proceedings of the Royal Society, London
Volume: 6:295-296.
 
Froneman, P.W., E.A. Pakhomov & V. Meaton 1998 Observations on the association between the diatom, Fragilariopsis doliolus Wallich, and the tintinnid, Salpingella subconica Kafoid. South African Journal of Science
Volume: 94(5):202.
 
Oldewage, W.H. & J.G. van As 1987 Observations on the attachment of a piscine gill parasitic ergasilid (Crustacea: Copepoda). South African Journal of Zoology
Volume: 22(4):313-317, figs. 1-2. (x.1987, Afrikaans summary). [RMNH]
 
Benz, G.W. 1981 Observations on the attachment scheme of the parasitic copepod Pandarus satyrus (Copepoda: Pandaridae). Journal of Parasitology
Volume: 67(6):966-967, fig. 1, tab. 1. (xii-1981)
Wilson: paper
Tsurnamai, M. & J. Marder 1966 Observations on the basket star Astroboa nuda (Lyman) on coral reefs at Elat (Gulf of Aqaba). Israel Journal of Zoology
Volume: 15:9-17, figs. 1-4, tab. 1. (v-1966)
 
Pillai, S.R. & V.V. Rao 1963 Observations on the biology and fishery of the hilsa, Hilsa Ilisha(Hamilton) of River Godavari. Proceedings of the Indo-Pacific Fisheries Council
Volume: 10(2):37-61, figs. 1-10, tabs. 1-9.
 
Iliffe, T.M. 1987 Observations on the biology and geology of anchialine caves. In: Curran, H.A. (ed.). Proceedings of the 3rd Symposium on the Geology of the Bahamas. Bahamian Field Station, Bahamas
Volume: :73-80.
 
Holst, J.C., F. Nielsen, K. Hodneland & A. Nylund 1993 Observations on the biology and parasites of postmolt Atlantic salmon, Salmo salar, from the Norwegian Sea. Journal of Fish Biology
Volume: 42:962-966.
 
Tedla, S. & C.H. Fernando 1969 Observations on the biology of Ergasilus spp. (Cyclopoidea: Copepoda) infesting North American freshwater fishes. Canadian Journal of Zoology
Volume: 47:405-408, fig. 1, tabs. 1-2. (v-1969)
Wilson: paper
Lahav, M. & S. Sarig 1964 Observations on the biology of Lernaea cyprinacea L. in fish ponds in Israel. Bamidgeh, Bulletin for Fish Culture in Israel
Volume: 16(3):77-86, figs. 1-3, tabs. 1-5. (ix-1964)
 
Fish, C.J. 1955 Observations on the biology of Microsetella norvegica. Deep-Sea Research, Supplement
Volume: 3:242-249, figs. 1-4, tabs. 1-4.
Wilson: paper
Hanson, J.M. & S.U. Qadri 1980 Observations on the biology of black crappie, Pomoxis nigromaculatus (Lesueur), in the Ottawa River. Naturaliste Canadien, Quebec
Volume: 107(1):35-42.
 
Sproston, N.G. & P.H.T. Hartley 1941 Observations on the bionomics and physiology of Trebius caudatus and Lernaeocera branchialis (Copepoda). Journal of the Marine Biological Association of the United Kingdom
Volume: n. ser. 25:393-417, figs. 1-5, tabs. 1-4. (xi-1941)
Wilson: paper
Govindankutty, A.G. & N.B. Nair 1973 Observations on the breeding periods of certain interstitial nematodes, gastrotrichs and copepods of the south-west coast of India. Journal of the Marine Biological Association of India
Volume: 14(1):402-406, tabs. 1-3. (iv-1973)
 
Sherman, K. & K.A. Honey 1968 Observations on the catching efficiencies of two zooplankton samplers. International Commissionn NW Atlantic Fisheries Redbook
Volume: 1968(3):75-80.
 
Smith, H.D. 1973 Observations on the cestode Eubothrium salvelini in juvenile sockeye salmon (Oncorhyncus nerka) at Babine Lake, British Columbia. Journal of the Fisheries Research Board of Canada
Volume: 30:947-964.
Wilson: paper
Northcote, T.G. 1954 Observations on the comparative ecology of two species of fish, Cottus asper and Cottus rhotheus, in British Columbia. Copeia
Volume: 1:25-28.
Wilson: paper
Kauvee, I.K.V., Gibbons, M.J. & H.M. Verheye 2005 Observations on the composition of the copepod community either side of the Lüderitz upwelling cell. B.Sc. (Honors) Thesis, University of the Western Cape, Tygerberg, South Africa.
Volume: 41 pp.
 
Kok, O.B. & J.U. Grobbelaar 1978 Observations on the crustaceous zooplankton in some freshwater bodies of the sub-antarctic island Marion. Hydrobiologia
Volume: 59(1):3-8, figs. 1-5, tabs. 1-4. (17-v-1978)
 
Chiahou, B. & M. Ramdani 1998 Observations on the density and biomass variations of pelagic copepods from the Moroccan Atlantic coast (region of El Jadida) during one annual cycle. Marine Life
Volume: 6(1-2):21-25. (for 1996)
 
Björnberg, T.K.S. 1965 Observations on the development and the biology of the Miracidae Dana (Copepoda: Crustacea). Bulletin of Marine Science
Volume: 15(2):512-520, figs. 1-8. (vi-1965)
Wilson: paper
Grobler, N.J., K.W. Christison, P.A.S. Olivier & J.G. Van As 2003 Observations on the development of Udonella caligorum Johnston, 1835 (Monogenea: Polyonchoinea) on a parasitic copepod species of Caligus (Copepoda: Caligidae), collected from Lake St Lucia, South Africa. African Zoology
No Volume Data Available
 
Moravec, F. 1969 Observations on the development of Camallanus lacustris (Zoega, 1776) (Nematoda: Camallanidae). Acta Societatis Zoologicae Bohemoslov.
Volume: 33:15-33.
 
Stankowska Radziun, M. & K. Radziun 1993 Observations on the development of Salmincola edwardsii (Olsson, 1869) (Copepoda: Lernaeopodidae) parasitizing the Arctic charr (Salvelinus alpinus (L.)) in the Hornsund region (West Spitsbergen). Acta Ichthyologica et Piscatoria, Szczecin
Volume: 23(Supplement):107-114.
 
Moravec, F. & T. Scholz 1994 Observations on the development of Syncuaria squamata (Nematoda: Acuariidae), a parasite of cormorants, in the intermediate and paratenic hosts. Folia Parasitologica, Ceske Budejovice
Volume: 41(3):183-192.
 
Shetty, H.P.C., S.B. Saha & B.B. Ghosh 1963 Observations on the distribution and fluctuations of plankton in the Hooghly-Matlah estuarine system, with notes on their relation to commercial fish landings. Indian Journal of Fisheries
Volume: 8(2):326-363, figs. 1-15, tabs. 1-2. (xii-1963)
 
Dumnicka, E. 2004 Observations on the distribution of aquatic fauna in Tatra mountain caves. Subterranean Biology
Volume: 1(1):49-56.
 
Russell, F.S. 1936 Observations on the distribution of plankton animal indicators made on Col. E. T. Peel's yacht 'St. George' in the mouth of the English Channel, July, 1915. Journal of the Marine Biological Association of the United Kingdom, New Series
Volume: 20:507-522, figs. 1-6. (iii-1936)
Wilson: paper
Ilyichev, V.I., V.V. Anikiev, E.G. Starodubtsev, N.A. Rodionov, N.M. Kulinich & A.V. Shornikov 1982 Observations on the distribution of the red tide in Peter the Great Bay (Sea of Japan). Biologiya Morya, Vladivostok / Russian Journal of Marine Biology
Volume: 5:6-8.
 
Roe, H.S.J. 1974 Observations on the diurnal vertical migrations of an oceanic animal community. Marine Biology, Berlin
Volume: 28(2):99-113, figs. 1-6, tabs. 1-10. (19-xii-1974)
Wilson: paper
De Decker, A.H.B. 1964 Observations on the ecology and distribution of Copepoda in the marine plankton of South Africa. Investigational Reports of the Division of Sea Fisheries, Republic of South Africa
Volume: 49:1-33, figs. 1-2, tabs. 1-4, chart. (vi-1964)
Wilson: paper
Bricker, K.S., J.E. Gannon, L.S. Roberts & B.G. Torke 1978 Observations on the ecology and distribution of free-living Ergasilidae (Copepoda, Cyclopoida). Crustaceana (Leiden)
Volume: 35(3):313-317, fig. 1, tab. 1. (28-xi-1978)
Wilson: paper
Onwuliri, C.O.E., R.C. Obi & J.C. Anosike 1991 Observations on the ecology of Cyclops in Nigeria. Tropical Ecology
Volume: 32(2):212-222.
 
Naylor, E. & D.J. Slinn 1958 Observations on the ecology of some brackish water organisms in pools at Scarlett Point, Isle of Man. Journal of Animal Ecology
Volume: 27:15-25.
 
Lake, P.S. & K.J. Newcombe 1975 Observations on the ecology of the crayfish Parastacoides tasmanicus (Decapoda; Parastacidae) from south-western Tasmania. Australian Zoologist
Volume: 18(3):197-214. (viii.1975)
Wilson: paper
Razouls, S. 1985 Observations on the ecophysiology of a planktonic Crustacean, Drepanopus pectinatus (Copepoda, Calanoida, Pseudocalanidae), from southern islands. In: Gray, J.S. & M.E. Christiansen (eds.). Marine Biology of Polar Regions and Effects of Stress on marine Organisms. Proceedings XVIII. European marine Biology Symposium
Volume: :123-139, figs. 1-7, tabs. 1-5.
 
Jamieson, C.D. 1980 Observations on the effect of diet and temperature on rate of development of Mesocyclops leuckarti (Claus) (Copepoda, Cyclopoida). Crustaceana (Leiden)
Volume: 38(2):145-154, fig. 1, tabs. 1-4. (20-iii-1980)
 
Samman, J. & M. Pugh Thomas 1979 Observations on the effect of the aerial spraying of abate, used in the control of Simulium larvae, on the drift rates of Microcrustacea and Chaoboridae in the River Oti, Ghana. International Journal of Environmental Studies
Volume: 14(1):43-48.
 
Bond, N.R. 2004 Observations on the effects of the introduced parasite Lernaea cyprinacea on a lowland population of a small native Australian fish, mountain galaxias Galaxias olidus. Victorian Naturalist, Blackburn
Volume: 121(5):194-198.
 
Natarajan, P., L.N. Srikar & A.P. Pandian 1983 Observations on the electrophoretic pattern of proteins of copepod parasites. Comparative Physiology and Ecology
Volume: 8(1):9-11, fig. 1, tab. 1.
 
Reeve, M.R. & M.A. Walter 1977 Observations on the existence of lower threshold und upper critical food concentrations for the copepod Acartia tonsa Dana. Journal of Experimental Marine Biology and Ecology
Volume: 29(3):211-221, figs. 1-3. (x-1977)
 
Jayasree, G.R. 1983 Observations on the family Lernanthropidae (Copepoda). In: John, P.A. (ed.). Selected papers on Crustacea. Prof. (Dr.) N. Krishna Pillai felicitation volume: Prof. N. Krishna Pillai Farewell Committee, Trivandrum, 1983: 1-207
Volume: :77-87, figs. 1-15.
Wilson: paper
Weslawski, J.M., S. Kwasniewski, J. Wiktor & M. Zajaczkowski 1995 Observations on the fast ice biota in the fjords of Spitsbergen. Polish Polar Research
Volume: 14(4):331-343. (for 1993)
 
Gunther, E.R. 1934 Observations on the fatty constituents of marine plankton. I. Biology of the plankton. Journal of Experimental Biology
Volume: 11:173-197, tabs. 1-13.
 
Collin, G., J.C. Drummond, T.P. Hilditch & E.R. Gunther 1934 Observations on the fatty constituents of marine plankton. II. General character of the plankton oils. Journal of Experimental Biology
Volume: 11:198-202.
 
Krumholz, L.A. 1958 Observations on the fish population of a lake contaminated by radioactive wastes. Bulletin of the American Museum of Natural History
Volume: 110(4): 281-367.
 
Manojkumar, P.P. 2008 Observations on the food of Nemipterus mesoprion (Bleeker, 1853) from Malabar coast. Journal of the Marine Biological Association of India
Volume: 50(1):52-56.
 
Scott, T. 1902 Observations on the food of fishes. Report of the Fishery Board for Scotland
Volume: 20(3):486-538.
 
Ogilvie, H.S. 1927 Observations on the food of post larval herring from the Scottish coast. Scientific Investigations of the Fishery Board of Scotland
Volume: 1927(1):1-10, pl. 1, tabs. 1-11, 11a. (v-1927)
 
Smyly, W.J.P. 1952 Observations on the food of the fry of perch (Perca fluviatilis Linn.) in Windermere. Proceedings of the Zoological Society of London
Volume: 122(2):407-416.
 
Delco, E.A. 1962 Observations on the freshwater fish parasite Lernaea catostomi (Kroyer). Texas Journal of Science
Volume: 14:365-367. (ix-1962)
Wilson: paper
Pillai, N.K. 1963 Observations on the genus Abasia (Copepoda) with the description of a new species. Crustaceana (Leiden)
Volume: 5(1):1-9, figs. 1-3. (30-i-1963)
Wilson: paper
West, G.A. 1987 Observations on the genus Colobomatus, copepod parasites of the lateral-line canals of fishes. Ph.D. Thesis, University of Queensland, Brisbane, Queensland, Australia.
No Volume Data Available
 
Pillai, N.K. & R.S. Lal Mohan 1967 Observations on the genus Heniochophilus (Copepoda) with a redescription of the type species. Journal of the Marine Biological Association of India
Volume: 9(2):270-276, figs. 1-14. (28-ii-1967)
Wilson: paper
Saraswathy, M. 1961 Observations on the genus Ratania (Copepoda) with a description of the type species. Bulletin of the Central Research Institute, University of Kerala
Volume: (C)8:141-146, figs. 1-17. (xi-1961)
Wilson: paper
Packard, A.S., Jr. 1867 Observations on the glacial phenomena of Labrador and Maine, with a view of the recent invertebrate fauna of Labrador. Memoirs of the Boston Society of Natural History
Volume: 1:210-303, pls. 7-8.
 
Tedla, S. & C.H. Fernando 1969 Observations on the glochidia of Lampsilis radiata (Gmelin) infesting yellow perch, Perca flavescens (Mitchell) in the Bay of Quinte, Lake Ontario. Canadian Journal of Zoology
Volume: 47:705-712.
 
Beck, B. & A.W. Mansfield 1969 Observations on the Greenland shark, Somniosus microcephalus, in northern Baffin Island. Journal of the Fisheries Research Board of Canada
Volume: 26(1):143-145, figs. 1-4, tab. 1. (i-1969)
Wilson: paper
Thomas, M.M. 1961 Observations on the habits and post-embryonic development of a parasitic branchiuran Argulus puthenveliensis Ramakrishna. Journal of the Marine Biological Association of India
Volume: 3(1/2):75-86.
Wilson: paper
Rahemo Zohair, I.F., H.S. Bushra & Al-Neemi 1999 Observations on the histopathology caused by some parasites of the freshwater fish, Silurus glanis L. Rivista di Parassitologia
Volume: 16(3):227-235.
 
Walkey, M., D.B. Lewis & H.J.G. Dartnell 1970 Observations on the host-parasite relations of Thersitina gasterostei (Crustacea: Copepoda). Journal of Zoology, London
Volume: 162(3):371-381, figs. 1-3, tabs. 1-4.
 
Pati, S. 1980 Observations on the hydrography and inshore plankton of the Bay of Bengal off Balasore. Hydrobiologia
Volume: 70(1-2):123-132, figs. 1-4. (15-iv-1980)
 
Joy, J.E. & L.P. Jones 1973 Observations on the inflammatory response within the dermis of a white bass, Morone chrysops (Rafinesque), infected with Lernaea cruciata (Copepoda: Caligidae). Journal of Fish Biology
Volume: 5(1):21-23, pl. 1. (i-1973)
 
Akyüz, E.F. 1957 Observations on the Iskanderun Red Mullet (Mullus barbatus) and its environment. Proceedings and Technical Papers of the General Fisheries Council for the Mediterranean, FAO, Rome
Volume: 4:305-326.
 
Corkett, C.J. & D.L. Urry 1968 Observations on the keeping of adult female Pseudocalanus elongatus under laboratory conditions. Journal of the Marine Biological Association of the United Kingdom
Volume: 48(1):97-105, fig. 1, tabs. 1-6. (ii-1968)
Wilson: paper
Miller, R.B. & W.A. Kennedy 1948 Observations on the lake trout of Great Bear Lake. Journal of the Fisheries Research Board of Canada
Volume: 7(4):176-189, figs. 1-2, tabs. 1-7. (Parasites: 186-189).)(ii-1948).
 
Whisler, H.C., B.P. Gabriel, J. Chanpaisaeng, S.L. Zebold & L.E. Padua 1999 Observations on the life cycle of Coelomomyces indicus (Blastocladiales: Coelomomycetaceae) in anopheline mosquitoes from the Philippines and Thailand. Journal of Medical Entomology
Volume: 36(6):695-701.
 
Cox, W.T. & G.L. Hendrickson 1991 Observations on the life cycle of Proteocephalus tumidocollus (Cestoda: Proteocephalidae) in steelhead trout, Oncorhynchus mykiss. Journal of the Helminthological Society of Washington
Volume: 58(1):39-42.
Wilson: paper
Williams, D.D., N.E. Williams & H.B.N. Hynes 1974 Observations on the life history and burrow construction of the crayfish Cambarus fodiens (Cottle) in a temporary stream in southern Ontario. Canadian Journal of Zoology
Volume: 52(3):365-370. (iii.1974)
Wilson: paper
Wang, P.Q. & Y.R. Zhao 1980 Observations on the life history of Anguillicola globiceps (Nematoda: Anguillicolidae). Acta Zoologica Sinica
Volume: 26(3):243-249.
 
Hastings, P.A. & .A. Bortone 1980 Observations on the life history of the belted sndfish, Serranus subligarius (Serranidae). Environmental Biology of Fishes
Volume: 5:365-374.
 
Herrington, W.C. 1939 Observations on the life history, occurrence, and distribution of the redfish parasite Sphyrion lumpi. Department of Commerce, Bureau of Fisheries, Washington, DC, Technical Report
Volume: 11pp., 6 figs.
Wilson: paper
Herrington, W.C., H.M. Bearse & F.E. Firth 1939 Observations on the life history, occurrence, and distribution of the redfish parasite Sphyrion lumpi. Special Scientific Report of the United States Bureau of Fisheries
Volume: 5:1-18.
 
Smyly, W.J.P. 1957 Observations on the life-history of the harpacticoid copepod, Canthocamptus staphylinus (Jurine). Annals and Magazine of Natural History
Volume: ser.12(10): 509-512, figs. 1-2. (29-x-1957)
Wilson: paper
Summers, P.B. 1961 Observations on the limnological dynamics of Tenkiller Ferry Reservoir. Oklahoma Department of Wildlife Conservation, Federal Aid Division, Job Completion Report, Investigation #F-7-R-1
Volume: :1-52.
Wilson: paper
Grabda, J. 1975 Observations on the localization and pathogenicity of Haemobaphes diceraus Wilson, 1917 (Copepoda: Lernaeoceridae) in the gills of Theragra chalcogramma (Pallas). Acta Ichthyologica et Piscatoria, Szczecin
Volume: 5(2):13-23, figs. 1-10.
 
Brown, C.J.D. & R.J. Graham 1953 Observations on the long nose sucker in Yellowstone Lake. Transactions of the American Fisheries Society
Volume: 83:38-46, figs. 1-2, tabs. 1-3.
 
Peach, C.W. 1850 Observations on the luminosity of the sea, with descriptions of several of the objects which cause it, some new to the British coast. Annals and Magazine of Natural History
Volume: (2)6(36):425-434, pls. 14-16.
 
Frantz, T.C. & A.J. Cordone 1996 Observations on the macrobenthos of Lake Tahoe, California-Nevada. California Fish and Game
Volume: 82(1):1-41.
Wilson: paper
Higler, L.W.G. 1976 Observations on the macrofauna of a Dutch ditch. Hydrobiological Bulletin, Amsterdam
Volume: 10(1):66-73, figs. 1-3, tabs. 1-3. (iv-1976)
 
Bhaskaran, M. & P. Gopalakrishnan 1972 Observations on the marine plankton in the Gulf of Kutch, off Port Okha. Indian Journal of Fisheries
Volume: 18(1-2):99-108, figs. 1-5. (xi-1972)
 
McIntosh, W.C. 1866 Observations on the marine zoology of North Uist, Outer Hebrides (Coelenterata, Mollusca, Echinodermata, Gephyrea, and Pisces). Proceedings of the Royal Society of Edinburgh
Volume: 5(70):600-614, figs. 1-7.
 
Hill, L.L. & R.E. Coker 1930 Observations on the mating habits of Cyclops. Journal of the Elisha Mitchell Scientific Society
Volume: 45(2):206-220. (v-1930).
Wilson: paper
Forester, S.J. 1990 Observations on the meiobenthos associated with seagrass (Thalassia testudinum) beds and coral sand, Belize. B.Sc. Thesis, Queen Mary and Westfield College, University of London, London, U.K.
No Volume Data Available
 
Walker, E.R. 1908 Observations on the micro-fauna of an Oregon pond. Transactions of the American Microscopical Society
Volume: 28:75-83, pl. 6. (ix-1908)
Wilson: paper
Gannon, J.E. & S.A. Gannon 1975 Observations on the narcotization of crustacean zooplankton. Crustaceana (Leiden)
Volume: 28(2):220-224, tabs. 1-2. (3-iv-1975)
Wilson: paper
Dowidar, N.M. & A.M. El-Maghraby 1971 Observations on the neritic zooplankton community in Abu qir Bay during the flood season. Rapports et Procès-Verbaux des Réunions de la Commission Internationale pour l'Exploration Scientifique de la Mer Mediterranée, Monaco
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Santhakumari, V. & N. Balakrishnan Nair 1982 Observations on the parasites and associates of wood boring molluscs and crustaceans of the south-west coast of India. Fishery Technology
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Humes, A.G. 1986 Observations on xarifiid copepods parasitic in Scleractinia. In: Schriever, G., H.K. Schminke & C.-t. Shih (eds.). Proceedings of the Second International Conference on Copepoda, Ottawa, Canada, 13-17 August, 1984. Syllogeus
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Petter, A.J., J. Cassone & N. le Belle 1990 Observations sur la biologie des premiers stades larvaires d'Anguillicola crassus, nematode parasite d'anguille. Annales de Parasitologie Humaine et Comparée
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Lakkis, S. & H. Konyoumjian 1974 Observations sur la composition et l'abondance du zooplancton aux embouchures d'effluents des eaux de Beyrouth. Rapports et Procès-Verbaux des Réunions de la Commission Internationale pour l'Exploration Scientifique de la Mer Mediterranée, Monaco
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Skabichevsky, A.B. 1935 Observations sur le plancton dans la baie Bagrouzinsky du lac Baikal pendant la période estivale de 1923 à 1933. Izv. biologo-geogr. nauchno-issled. Inst., Irkutsk
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Grabda, J. 1956 Obserwacje nad lerneoza pstragów. Observations on the Lernaeosis of trouts. Medycyna Wet., Lublin
Volume: 5:257-260, figs. 1-2. (10-v-1956, Polish with Russian and English summaries).
 
Grabda, J. 1977 Obserwacje nad lokalizacje i patogenicznoÑci Haemobaphes diceraus Wilson, 1917 (Copepoda: Lernaeoceridae) w jamie skrzelowej Theragra halcogramma (Pallas). (Observations on the location and pathogenicity of Haemobaphes diceraus Wilson, 1917 (Copepoda: Lernaeoceridae) on the Alaska pollack Theragra halcogramma (Pallas).) WiadomoÑci Parazytologiczne
Volume: 23(1-2-3):179-180. (Polish)
 
Szlauer, L. 1959 Obserwacje nad przebiegiem kopulacji u oczlika Cyclops kolensis Lilljeborg. Observations on the course of copulation in Cyclops kolensis. Polskie Archiwum Hydrobiologii
Volume: 5(18/2):101-109, pl. 1. (Polish with Russian and English summaries).
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Szlauer, L. 1959 Obserwacje nad rozmnazaniem oczlika Cyclops kolensis Lilljeborg. Investigations on the reproduction of Cyclops kolensis Lilljeborg. Polskie Archiwum Hydrobiologii
Volume: 5(18/2):111-120, tabs. 1-2.
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Hajduk, Z. 1964 Obserwacje nad wystepowaniem wioslarek (Cladocera) i widlonogów (Copepoda, Cyclopoida) w zbiornikach wodnych na terenie Snieznych Kotlów. Observations upon the occurrence of Cladocera and Copepoda within the water basins of Sniezne Kotly. Przeglad Zoologiczny, Wroclaw
Volume: 8(3):257-264, figs. 1-8. (24-iv-1964, Polish with English summary).
 
Milovskaya, L.V. 1986 Obshchaya kharakteristika letnego raspredeleniya kormovogo kopepodnogo planktona v oz. Kuril'skom. [Characteristics associated with the annual distribution of the copepod plankton crop in Lake Kuril'skoe.] In: Kompleksnye issledovaniya ozera Kuril'skogo. (Comprehensive Studies of Lake Kuril'skoe.) Izdatel'stvo Dal'nevostochnogo Tikhookeanskogo Nauchno-issledovatel'skogo Instituta Rybnogo Khozyaistva i Okeanografii (TINRO), Vladivostok. 153 pp.
Volume: Pp. 72-82. [In Russian.]
 
Dogel', V.A. 1962 Obshchaya parazitologiya. Pererabotano i donolneno Yu. Yu. Polyansky i E.M. Kheisinym
Volume: 1-464, figs. 1-288. Translation by Z. Kabata, 1964, as: General Parasitology: i-xi, 1-516, figs. 1-288.
 
Shul'man, R.E. & N.B. Chernysheva 1969 Obshchiy analiz parazitofauny ryb ozera Seliger (General review of the parasite fuana of fishes of Lake Seliger). In: Polyansky, Yu.I. (ed.). Ekologo-parazitologicheskie issledovaniya na ozere Seliger (Studies in ecological parasitology on Lake Seliger), Izd. Leningrad University, USSR
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Hairston, N.G., Jr. & S. Twombly 1985 Obtaining life table data from cohort analyses: a critique of current methods. Limnology and Oceanography
Volume: 30(4):886-893, figs. 1-6. (vii-1985)
 
Hairston, N.G., Jr. 1985 Obtaining life table data from cohort analyses: a critique of current methods. Limnology and Oceanography
Volume: 30(4):886-893.
 
Shul'man, S.S. 1954 Obzor fauny parazitov osetrovykh ryb SSSR. (Parasites of sturgeons in the USSR). Trudy leningr. Obshch. Estest. (= Trav. Soc. Nat. Leningrad)
Volume: 72(4): 190-254, figs. 1-2.
 
Siewerth, M.W. 1927 Obzor fauny presnovodnykh Eucopepoda Ukrainy. Review of the freshwater Eucopepoda fauna of the Ukraine. Trudy khar'kiv. Tov. Dosl. Prir.
Volume: 50(2): 3-22 (121-140), tab. (Russian).
 
Monchenko, V.I. 1967 Obzor fauny veslonogikh rakoobraznykh Dneprovsko-Bugskogo limana. Survey of Copepoda of the Dnieper-Bug estuary. Gidrobiologicheskii Zhurnal
Volume: 3(1):70-73, figs. 1-2, tab. (17-i-1967, Russian.)
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Gerd, S.V. 1946 Obzor gidrobiologisheskikh issledovanii ozer Karelli. Trudy Karelo-finsk. otd. VNIRO
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Markhaseva, E.L. 1989 Obzor roda Pseudochirella (Copepoda, Calanoida). Survey of genus Pseudochirella (Copepoda, Calanoida). In: Petrushevska, M.G. & S.D. Stepan'yants (eds.). Morskoi Plankton. Sistematika, ekologiya, raspredelenie. Marine plankton. Taxonomy, ecology, distribution., Issled. Fauny Morei
Volume: 41(49):33-60, figs. 1-19. (27.vii.1989, Russian with English summary).
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Heptner, M.V. 1972 Obzor rodovo struktury semestva Heterorhabdidae (Copepoda, Calanoida). A review of the generic structure of the family Heterorhabdidae (Copepoda, Calanoida). Byulleten' Moskovskogo Obshchestva Ispytatelei Prirody, Otdel Biologicheskii, n. ser.
Volume: 77(6):54-64, figs. 1-2. (8-xii-1972, Russian with English summary).
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Souissi, A., S. Souissi, D. Devreker & J.S. Hwang 2010 Occurence of intersexuality in a laboratory culture of the copepod Eurytemora affinis from the Seine estuary (France). Marine Biology, Berlin
Volume: 157(4):851-861.
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Linderby, E. & J. Thulin 1983 Occurrence and abundance of parasitic copepods on cod along the west coast of Sweden. Proceedings of the XI. Scandinavian Symposium on Parasitology, Information
Volume: 17:79. (Abstract.)
 
Bhuiyan, A.S., M.T. Islam & R. Sharmeen 2008 Occurrence and abundance of some copepods in a fish pond in Rajshahi, Bangladesh in relation to the physico-chemical conditions. Journal of Bio-Science
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Muniza, F. & Q.B. Kazmi 1995 Occurrence and abundance of two genera: Eucalanus and Rhincalanus of the family Eucalanidae (Copepoda: Calanoida) in the samples of NASEER Cruise 1, January 1992. Science International, Lahore
Volume: 7(4):395-400.
 
Nayeem, I. 1993 Occurrence and abundance of zooplankton off Manora Channel during 1989. In: Tirmizi, N.M. & Q.B. Kazmi (eds.) Proceedings of the National Seminar on Study and Management of Coastal zones in Pakistan. Pakistan National Commission for UNESCO and MRC, Karachi.
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Tanimura, A., M. Fukuchi & H. Ohtsuka 1984 Occurrence and age composition of Paralabidocera antarctica (Calanoida, Copepoda) under the fast ice near Syowa Station, Antarctica. Proceedings of the VI. Symposium on Polar Biology. Memoirs of the National Institute of Polar Research, Special Issue
Volume: 32:81-86, figs. 1-4. (viii-1984)
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Helm, P.A., S.B. Gewurtz, D.M. Whittle, C.H. Marvin, A.T. Fisk & T. Gregg 2008 Occurrence and biomagnification of polychlorinated naphthalenes and non- and mono-ortho PCBs in Lake Ontario sediment and biota. Environmental Science and Technology
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Oldewage, W.H. & J.G. van As 1989 Occurrence and distribution of Caligus (Copepoda: Siphonostomatoida) in African coastal waters. Revue de Zoologie Africaine
Volume: 103(1):91-98, appendix 1.
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Leite, N. da R., J.G.S. Silva, S.C.C. Pinheiro, L.C.C. Pereira, F. Abrunhosa & R.M. da Costa 2007 Occurrence and distribution of Cymbasoma longispinosum (Copepoda: Monstrilloida) in Curuça estuary (Northern Brazil). In: The Plankton Symposium, João Pessoa, Brazil, 1-5 April 2007. BDUA-Journal of Biology
Volume: 2:88. [Abstract.]
 
Avenant, A. & J.G. Van As 1985 Occurrence and distribution of Dolops ranarum Stuhlmann, ectoparasite of freshwater fish in the Transvaal, South Africa. Journal of Fish Biology
Volume: 27:403-416.
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Chigbu, P. 2001 Occurrence and distribution of Salmincola californiensis (Copepoda: Lernaeopodidae) on juvenile sockeye salmon (Oncorhynchus nerka) in Lake Washington. Journal of Freshwater Ecology
Volume: 16(4): 615-620.
 
Campaner, A.F. 1985 Occurrence and distribution of copepods (Crustacea) in the epipelagial off southern Brazil. Boletim do Instituto Oceanográfico, Sao Paulo
Volume: 33(1):5-27, figs. 1-15, tabs. 1-2 in appendix. (Portuguese summary.)
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Northcote, T.G. & W.E. Johnson 1964 Occurrence and distribution of seawater in Sakinaw Lake, British Columbia. Journal of the Fisheries Research Board of Canada
Volume: 21(5):1321-1324, figs. 1-3. (ix-1964, French summary.)
 

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