8,400 research outputs found
Collection, storage, transport, and acclimation of milkfish fry and fingerlings
No full textThe present methods of collecting fry and fingerlings involve filtration by mobile or stationary devices. The bottom topography of the fry ground, wind direction, and tidal fluctuations are the most important considerations in the design and construction of fry and fingerling catching gear. The behavior of young milkfish (Chanos chanos ) in the different environments where they are exploited determines the catching methods to be employed. Collection, handling, storage, and transport activities expose the fish to undue stress, which contributes to poor survival. The simple method of lowering the salinity of the water medium considerably reduces mortality. Prior acclimation history has significant effects on subsequent survival and adaptation. Although it appears that milkfish fry are more hardy than the fingerlings, both have the same capability for resisting subsequent environmental stress provided sufficient time is given for the fish to recover from previous stress
The ecological aspects of milkfish fry occurrence, particularly in the Philippines
No full textAspects of the time, place, and mechanism of occurrence of milkfish (Chanos chanos ) fry, defined as the postlarvae 10-17 mm in total length and 3 weeks of age are considered. Fry occurrence shows seasonal patterns that differ by latitude. In the Philippines (15-21 degree N), fry appear earlier in the south (December-January) and later in the north (March-April); they disappear earlier in the north (July-August) than in the south (December-January). Greater numbers of fry occur in shore waters during the full moon and new moon periods, largely as a consequence of the greater spawning activity during the quarter moon periods. Fry catch by various active and passive filtering gear is greater at floods and high tide than at low and ebb tide. Milkfish fry occur in and are collected mostly from sandy beaches, particularly the surf zone and in and around river mouths. They appear to be distributed mostly near the surface, with greater numbers nearer shore. It appears that larvae smaller than 9-10 mm are distributed in midwaters, but once they reach this size they come up and are carried inshore by tidal and wind-driven currents
The sense organs and behaviors of milkfish fry in relation to collection techniques
No full textThis paper describes the sense organs and some of the behavioral characteristics of milkfish (Chanos chanos ) fry, based on studies conducted at the Aquaculture Department, SEAFDEC, Philippines and at Kagoshima University, Japan in 1982. Based on the experimental results obtained and the observations made in the Philippines, Indonesia, and Taiwan, existing fry collection techniques such as the employment of fish lamps and scare lines are considered effective and rational. Several recommendations are made for improvements of the collection gear and for research on fry behavior
J. Willard Marriott Library Information Visualization Lecture Series presents Dr. Kirsten R. Butcher... Dr. Frank A. Drews, ... James Agutter, ... Dr. Ben Fry
No full textPoster publicizing the "Information Visualization Lecture Series" held during Winter Semester of 2013 in the Gould Auditorium of the J. Willard Marriott Library. Presenters included Dr. Kirsten R. Butcher (Educational Psychology), Dr. Frank A. Drews (Cognitive Psychology); James Agutter (College of Architecture and Planning); and Dr. Ben Fry (author of "Visualizing Data.
23 Squadron, 82 Wing
No full text"[Obscured] 23 Sqdn. 82 Wing. B24 Liberator New Guinea. Leyburn. Long Strip Fenton Strip Darwin RAAF Base. 1944-1945 O.B. Fry, Air Gunner Crew Members R. Kelly (C) Pilot. L. Woodland. Eng. A. Dawson Co-Pilot. Nobby Clark. Gunner Leader J. Clark W.A.G. M. Hennessey. Nav. K. Kemp A.G. A. Dalrymple. A.G. R. Arthur W.A.G. J. Potter. Bombadier. C.F.M. [Obscured][R.F.D. 1959-1984]."23 Squadron. 82 Wing B24 Liberator, New Guinea. Leyburn, Long Strip, Fenton Strip, Darwin Royal Australian Air Force Base. O. B. Fry, Air Gunner. R. Kelly, Captain, Pilot. A. Dawson, Co-Pilot. J. Clark, Wing Air Gunner. K. Kemp, Air Gunner. A. Dalrymple, Air Gunner. R. Arthur, Wing Air Gunner. J. Potter, Bombardier. L. Woodland, Engineer. Nobby Clark, Gunner Leader. M. Hennessey, Navigator.Date:199
Milkfish aquaculture in Sri Lanka
No full textMilkfish (Chanos chanos ) fry and fingerlings are abundant in coastal and brackishwater areas in Sri Lanka, yet the industry remains in a stage of underdevelopment. The main seed collection centers are Mannar and Kalpitiya in the northwest and the season is from March to June. The annual fry production potential of the Mannar tidal flats is estimated to be about 4 million. The brackishwater aquaculture potential of Sri Lanka is estimated to be about 120,000 ha. In the past, returns from fry collected from tidal pools and stocked into perennial tanks have been very poor. The recently initiated seed resources survey and investigations into scientific collection, transport, and culture including pen culture should help develop farming of milkfish in Sri Lanka. Polyculture of the species with other fish and shrimp and its culture in salterns are being attempted
Milkfish nutrition
No full textThis paper reviews major contributions in the field of milkfish (Chanos chanos ) nutrition since the First International Milkfish Aquaculture Conference in 1976. Substantial progress has been made toward understanding the digestion, foods, and feeding behavior of milkfish, which in its natural habitat apparently feeds on planktonic microorganisms and is most frequently designated as a microphagons planktivore. Vision seems to be the most important sensory mechanism for feeding in fry as well as in juvenilles and larger milkfish. There is very scant information on nutrient requirements and other important aspects of milkfish nutrition. A preliminary study on protein requirement showed that a dietary level of 40% protein was required by fry. Other studies showed that fry responded positively and were easily trained to accept artificial diets. The "deep water method" of growing milkfish practised in Taiwan demonstrated that, with the use of formulated diets, productivity in milkfish aquaculture could be increased three-fold over traditional culture methods, which rely on natural food bases
Milkfish research in the Philippines
No full textDevelopment and directions in milkfish (Chanos chanos ) research in the Philippines from 1976 to the present are reviewed and analyzed. The problems of milkfish culture are dichotomous: low productivity vis-a-vis seasons of glut and price fluctuations. To intensify fish production extensive research has been conducted on fertilizer management, reclamation of acid sulfate soils, and pond construction and engineering. Research efforts have also been heavily directed toward increasing fry production through artificial propagation, improvement of fry collecting gear, and increasing fry survival through nutrition, control of parasites, and proper handling. Research on improved icing, packaging, and processing techniques along with market analysis are necessary for maximizing economic returns
Milkfish fry collection and handling
No full textMilkfish fry can be collected in almost all the coastal waters of the tropical Indo-Pacific region. The fry season occurs at different times of the year in various sections of the species' geographical range. The season is longer near the equator and become progressively shorter at higher latitudes. In regions affected by monsoon or trade winds, the peak fry season typically coincides with one or both of the biannual wind shifts. These seasonal peaks are more or less predictable, but fry abundance may vary from year to year.
This paper summarizes the methods and practices of collection, storage, transport and acclimation of milkfish fry in various countries
An uncommon presentation of fungal infection in Atlantic salmon fry
No full textFungal infection in fry from several families of Atlantic salmon Salmo salar are reported. Moribund fry had a conspicuous cranial defect that corresponded with 18.3% mortality. The lesion was characterized by a domed, epithelium-covered swelling centered over the optic tectum. The swelling was an oedematous reaction to the extension of a fulminating necrotizing mycotic stomatitis and branchitis into the cranial tissues including the ventral meninges. The genus and species of the fungal pathogen were not identified, although histological examination was consistent with an oomycete. The % mortality of fry in each separately reared family ranged from 1.0 to 63.3%. An analysis of variance revealed significant differences in mortality among families (P http://upei-resolver.asin-risa.ca?sid=SP:CABI&id=pmid:&id=&issn=0899-7659&isbn=&volume=3&issue=3&spage=192&pages=192-197&date=1991&title=Journal%20of%20Aquatic%20Animal%20Health&atitle=An%20uncommon%20presentation%20of%20fungal%20infection%20in%20Atlantic%20salmon%20fry.&aulast=Hanke&pid=%3Cauthor%3EHanke%2c%20A%20R%3bBackman%2c%20S%3bSpeare%2c%20D%20J%3bFriars%2c%20G%20W%3C%2Fauthor%3E%3CAN%3E19941200171%3C%2FAN%3E%3CDT%3EJournal%20article%3C%2FDT%3
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