Fisheries Research Vessel Research Articles

Shipboard installation and trials of an electronic sector scanning sonar

The installation of a complex electronic scanning sonar in a fishery research vessel is described. It includes a versatile hydraulically-operated stable platform to which the electroacoustic transducer is attached. Problems of electrical and acoustic noise are discussed in relation to detection ranges. Applications include fish detection and fish behaviour studies, observations of trawls both in midwater and on the seabed, detection and classification of wrecks, and studies of sand waves and other seabed features, including detailed survey of gravel extraction.

IRRADIATION OF PACIFIC COAST FISH AT SEA

An experimental shipboard irradiator was installed aboard the Bureau Of Commercial Fisheries research vessel Miller Freeman and utilized to irradiate West Coast fish at sea. The optimum dose range for irradiating whole English sole (Parophrys vetulus), Dover sole (Microstomus pacificus), Pacific cod (Gadus macrocephalus), Pacific ocean perch (Sebastodes alutus), and black rockfish (Sebastodes melanops) is in the range of 50 to 100 kilorads. The shelf life (at a high level of quality) of the irradiated products was extended by one and one-half to two times that of the nonirradiated samples. Among the five species irradiated at various states of rigor, prerigor-rigor fish generally had better storage characteristics than postrigor fish.

Latham Island: An Ecological Note

approach to the Zanzibar Channel, about twenty-three and a half miles eastward of Ras Kimbiji which is the nearest point on the African mainland, and thirty-five miles south-east of Zanzibar Island. The authors landed on Latham on 12 October 1967 during the course of the East African Common Services Organization Indian Ocean Islands Expedition in which they were taking part as terrestrial biologists (Research Cruise No. 270 of the East African Marine Fisheries Research Organization Fisheries Research Vessel Manihine). In view of the outstanding importance of this little-known island as a sea-bird breeding site, the authors here include a brief summary of what is known of Latham and its natural history in addition to their own findings. HISTORY

Records of Mollusca from the northwest Atlantic obtained by Canadian fishery research vessels, 1946–1961 : Allen J. A., 1965. J. Fish. Bd., Canada, 22 (4): 977–997.

Records of Mollusca from the northwest Atlantic obtained by Canadian fishery research vessels, 1946–1961 : Allen J. A., 1965. J. Fish. Bd., Canada, 22 (4): 977–997.

Records of Mollusca from the Northwest Atlantic Obtained by Canadian Fishery Research Vessels, 1946–61

In the course of investigations into the fish and shrimp resources of an area from the southern edge of the Grand Bank and the Gulf of St. Lawrence to Cape Dyer, Baffin Island, numbers of Mollusca were taken. Commercial trawls were used for the great majority of the hauls and because of mesh selection most of the Mollusca taken were specimens of the larger species. The majority of the 45 species collected are well known and the value of the present list lies in the records of distribution from an area where climatic conditions have severely restricted past sampling endeavour.

On the Blood Types of Yellowfin and Bigeye Tuna

Previous articleNext article No AccessSymposium on Immunogenetic Concepts in Marine Population ResearchOn the Blood Types of Yellowfin and Bigeye TunaAkimi SuzukiAkimi Suzuki Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by The American Naturalist Volume 96, Number 889Jul. - Aug., 1962 Published for The American Society of Naturalists Article DOIhttps://doi.org/10.1086/282231 Views: 2Total views on this site Citations: 11Citations are reported from Crossref PDF download Crossref reports the following articles citing this article:C. Pecoraro, I. Zudaire, N. Bodin, H. Murua, P. Taconet, P. Díaz-Jaimes, A. Cariani, F. Tinti, E. Chassot Putting all the pieces together: integrating current knowledge of the biology, ecology, fisheries status, stock structure and management of yellowfin tuna (Thunnus albacares), Reviews in Fish Biology and Fisheries 27, no.44 (Dec 2016): 811–841.https://doi.org/10.1007/s11160-016-9460-zZhichao Wu, Qianghua Xu, Jiangfeng Zhu, Xiaojie Dai, Liuxiong Xu Genetic population structure of the bigeye tuna Thunnus obesus in the central Pacific Ocean based on mtDNA Cytb sequences, Fisheries Science 80, no.33 (Feb 2014): 415–426.https://doi.org/10.1007/s12562-014-0712-3Swaraj Priyaranjan Kunal, Girish Kumar, Maria Rosalia Menezes, Ram Murti Meena Mitochondrial DNA analysis reveals three stocks of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) in Indian waters, Conservation Genetics 14, no.11 (Jan 2013): 205–213.https://doi.org/10.1007/s10592-013-0445-3Hsin-Chieh Chiang, Chien-Chung Hsu, Hung-Du Lin, Gwo Chin Ma, Tzen-Yuh Chiang, Hsi-Yuan Yang Population structure of bigeye tuna (Thunnus obesus) in the South China Sea, Philippine Sea and western Pacific Ocean inferred from mitochondrial DNA, Fisheries Research 79, no.1-21-2 (Jun 2006): 219–225.https://doi.org/10.1016/j.fishres.2005.11.026S. A. Appleyard, R. D. Ward, P. M. Grewe Genetic stock structure of bigeye tuna in the Indian Ocean using mitochondrial DNA and microsatellites, Journal of Fish Biology 60, no.33 (Apr 2005): 767–770.https://doi.org/10.1111/j.1095-8649.2002.tb01701.xSeinen Chow, Hiroaki Okamoto, Naozumi Miyabe, Kazuhiko Hiramatsu, Noel Barut Genetic divergence between Atlantic and Indo-Pacific stocks of bigeye tuna (Thunnus obesus) and admixture around South Africa, Molecular Ecology 9, no.22 (Feb 2000): 221–227.https://doi.org/10.1046/j.1365-294x.2000.00851.xR. D. Ward Population genetics of tunas, Journal of Fish Biology 47, no.sasa (Dec 1995): 259–280.https://doi.org/10.1111/j.1095-8649.1995.tb06060.xJ. Tong, C. Wu Study on the blood type factors in red crucian carp (Carassius auratus var.), Aquaculture 111, no.1-41-4 (Apr 1993): 129–138.https://doi.org/10.1016/0044-8486(93)90031-SJ. Tong, C. Wu Study on the blood type factors in red crucian carp (Carassius auratus var.), (Jan 1993): 129–138.https://doi.org/10.1016/B978-0-444-81527-9.50017-8Rosemary I. Hawkins, LionelE. Mawdesley-Thomas Fish haematology-A bibliography, Journal of Fish Biology 4, no.22 (Apr 1972): 193–232.https://doi.org/10.1111/j.1095-8649.1972.tb05668.xJohn E. Cushing The Blood Groups of Marine Animals, (Jan 1964): 85–131.https://doi.org/10.1016/S0065-2881(08)60031-0

Oceanographic Observations in the Canadian Arctic and the Adjacent Arctic Ocean

... After the war arctic oceanographic investigations became more specific in character. The growing national interest in the North and the demand for information on the circulation, ice cover, ice movement, navigability, and the productivity of the waters led to the organization of a number of oceanographic cruises the result of which has been a vast accumulation of oceanographic observations within a very short time. The Fisheries Research Board of Canada has been instrumental in conducting a large proportion of this work beginning with the cruise of H.M.C.S. Magnificent and Haida to Hudson Bay in 1949. The same year the fisheries research vessel Calanus began investigations in Ungava Bay, and in 1951 and 1952 the motor vessel Cancolim of the Defence Research Board carried out oceanographic observations in the western Arctic. The surveys conducted from the icebreaker Labrador since 1954 have covered a large area of the eastern Arctic and have resulted in the first sequence of oceanographic observations to extend from Baffin Bay in the east to the Pacific Ocean in the west. ...

British fishery research in the Barents Sea

Since January 1949 the Arctic Team of the Fisheries Laboratory, Lowestoft, has been carrying out fishery research from the Ministry of Agriculture, Fisheries and Food Research vessel Ernest Holt, an Arctic-type trawler specially built and fitted out so that hydrographic and biological observations can be made on the Arctic fishing grounds throughout the year. At the time of writing the naturalists in the Arctic Team consist of Michael Graham (Leader); G. C. Trout and R. J. H. Beverton (Population studies); J. Corlett and P. T. Marshall (Plankton); Arthur Lee and H. W. Hill (Hydrography); R. W. Blacker (Benthos). I wish to thank my colleagues for allowing me to draw freely on their work which is in preparation for publication, and for contributing the illustrations to this article.

British fisheries research vessel Explorer

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Ink Ejection by Cephalopoda

IT has long been said that the ink discharged by the great majority of cephalopods is ejected as a black cloud, under cover of which the animal may escape from a threatened attack. That this is false is apparent to anyone who has watched the phenomenon. The ink (of such cephalopods that I have seen) initially does not form a cloud, but remains a discrete, dark, viscous mass; water turbulence breaks up the mass, dispersing it in the form of streaks indicating the direction of the current flow, and even in a small volume of water such as an aquarium tank, cloud formation takes place only after some considerable time. The importance of this may not be readily apparent in a brightly illuminated aquarium; but the following observation, made under conditions of reduced light intensity one evening aboard the Singapore Regional Fisheries Research Vessel Manihine (October 1955), appears to present the true interpretation of this escape reaction.

The danish oceanographic and fisheries research vessel Dana, and her post‐war program

This paper describes the origin and the present administration of the Danish Ministry of Fisheries' research vessel, Dana. The dimensions, the living, working and storage spaces, and the fundamental research equipment are also described. Plans of the ship are presented. The program of the Dana for the postwar years is briefly reported, including operations in the North Sea, the Faeroe Islands area, the North Atlantic and Davis Strait sections, and the Greenland west coast area. Station charts of selected operations are presented in conjunction with the above. Proposed future operations are discussed.

Some Experiments on the Vertical Migration of Zooplankton

Hardy & Paton (1947) have described two forms of apparatus with which to study the vertical migration of plankton animals; their intention was to carry out experiments under conditions as natural as possible. In their paper were published results for marine copepods; Paton had also used the instruments on freshwater plankton animals in Windermere, but before he was able to analyse the results, he was killed in action over Malta. After the war, Professor Hardy kindly allowed me to work up the results of Paton's freshwater experiments. One point that emerged from the analysis was that there was a difference in behaviour between animals caught from 15 m to the surface and those caught from 30 m to the surface. Experiments carried out by me in Windermere in 1947 were intended to investigate this diference. A night series was also completed, comparable to one that Paton carried out in 1939. Experiments were also carried out in the North Sea from the Fisheries Research Vessel Sir Lancelot; these consisted of two night series, one at 10 m and the other at 70 m.

Pilchard Shoals in South-west Australia

The distribution of pilchard shoals from echo-sounder records, obtained on the Fisheries Research Vessel Warreen between Albany and Esperance, is described. Data from echograms and ring net catches are used to estimate the density of fish in shoals. A method of estimating the number of shoals of pilchards per acre has been developed, using the sounder as a surveying instrument, and the quantity of shoal pilchards on two parts of the coast has been calculated. Dispersal of shoals when feeding conditions are good is deduced after examination of pilchard stomachs and N70 tow net hauls. Movements along the coast are inferred from the distance shoals must travel to obtain a full feed. The selection and avoidance of certain classes of food are discussed. The manner in which shoals come to the surface is described, and observations are made on behaviour of fish in surface shoals.

Canadian fisheries research vessel Calanus

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Climatic and Ecological Changes in Northern Waters

AT the meeting of the North-Western Area Committee of the Conseil Permanent International pour l‘Exploration de la Mer on October 22, 1947, the possible influence of the present climatic changes on the lives of marine animals (density, distribution, reproduction, migration, etc.) was discussed. Having regard to the probable importance of these changes in fisheries investigations, it was decided that every opportunity should be taken, by fishery research vessels and other suitable ships, to obtain without delay all possible data bearing upon this problem, especially in waters north of the Faroes, north and east of Iceland and in the Denmark and Davis Straits. It was also decided that relevant information from sources other than those of fisheries research would be of great value and should also be obtained. The information required comprises hydrographical, meteorological, glaciological and associated changes in northern regions, and the influence of those changes on the habits and distribution of animals and plants, both terrestrial and marine. Records should include locality (latitude and longitude), depth (if marine records), date, name and profession of observer, and references to relevant publications. Especially important are new records of animals and plants from localities recently included within their range of distribution, or the absence of species from previously populated areas. All data should be given exhaustively but concisely, and arranged so far as possible under the following headings : (1) meteorology ; (2) hydrography ; (3) glaciology ; (4) animals : (a) Mammalia, (b) Aves, (c) Testudinata (especially observations on the west coasts of the British Isles), (d) Pisces, (e) Invertebrata ; (5) plants ; (6) other items. Contributions to this inquiry are earnestly requested from everyone in possession of useful information, and should be addressed to Dr. A. Vedel T ning, Charlottenlund Slot, Charlottenlund, Denmark, preferably during December of each year.