Fish Attraction Research Articles

Food abundance and territory size in juvenile coho salmon (Oncorhynchus kisutch)

Feeding territory size and potential food abundance were measured simultaneously in a field population of juvenile (40–50 mm) coho salmon. Territory size was inversely related to the density of benthic food on the territory, as predicted from an energy-based model of territoriality. The relationship between the abundance of drift food and territory size was in the predicted direction, but was not significant. Territories were also smaller where intruder pressure was higher, but intrusion rate and food abundance were not directly correlated. Therefore, the effect of food abundance on territory size was not caused indirectly by attraction of nonterritorial fish to areas where food was abundant. In the laboratory, the distance from which a resident coho attacked an approaching model intruder increased asymptotically with hunger. The fish therefore appear to possess an appropriate behavioural mechanism (tactic) to adjust territory size to local food abundance.

Attraction of Notropis lutrensis (Cyprinidae) to Water Conditioned by the Presence of Conspecifics

Responses of red shiners, Notropis lutrensis, to water conditioned by the presence of conspecifics were evaluated in laboratory preference chambers. Fish from the South Canadian River (Arkansas River drainage) and Lake Texoma (Red River drainage), tested under different conditions at different times of year, all exhibited a strong attraction to water previously occupied by conspecifics. Olfaction as a cue to habitat selection is discussed with respect to the known ecology of the species. Some fishes of the turbid streams of the Great Plains have highly developed olfactory senses (Moore 1950). Notropis lutrensis (red shiner), one of the most abundant Great Plains species, can use physico-chemical and auditory stimuli in selecting habitat or locating mates (Delco 1960, Matthews and Hill 1979), but its response to olfactory stimuli has not been reported previously. Our field studies in the South Canadian River near Norman, Oklahoma, suggested that odor might also provide this species a cue to habitat selection, resulting in their attraction to water preconditioned by the presence of conspecifics. In October 1976, we collected 19,182 N. Iutrensis in a ca. 600 m section of the South Canadian River. Of those, 90.7% were taken in two backwater pools (each ca. 20 x 5 m) located near the main river channel (Matthews and Hill 1979). In addition to these collections, repeated visits to the site indicated use of the backwaters by large numbers of red shiners throughout October. We hypothesized that the shiners concentrated in the backwaters, despite adequate water for greater dispersal, because those areas presented favorable physico-chemical conditions. The backwaters were relatively stable thermally, fluctuating 1-2?C daily, compared to fluctuation of up to 12?C daily at mainstream locations. Additionally, diurnal pH in the backwaters (8.2-8.5) was closest to the pH selected by N. lutrensis in the laboratory (Matthews and Hill 1979), and pH in the mainstream (8.7-9.5) approached values stressful to this species (Matthews and Hill 1977). During the day, sharp temperature and pH gradients, which shiners could have used as habitat cues, existed between the mainstream and backwaters. At night, by contrast, no marked gradients existed, yet the thousands of N. lutrensis remained in the backwaters, not dispersing into nearby standing-water pools of the river mainstream. This behavior suggested that some factor not detected by our measurements, e.g., conditioning of backwaters by the presence of conspecifics, played a role in habitat selection by the species. The crowding of thousands of individuals into small pools undoubtedly resulted in accumulation of odors of mucous, excretory products, or other exudates. The attraction of fishes to water having the odor of conspecifics is well documented (Kleerekoper 1969, Fine et al. 1977).

Connecticut River Fishways: Model Studies

The fishways at the Vernon and Turners Falls Dams were optimized by use of hydraulic model studies. In both cases, slotted weirs were modified so that a better head loss distribution was obtained. In addition, the diffusers were modified to produce acceptable exit face velocity distributions. At Turners Falls, the fish entrance was modified to produce velocity conditions known to be acceptable to the two migrating species of fish. At Vernon Dam, flow conditions were optimized at the fish exit and attraction water intake. Modeling of these fishways has resulted in design changes that should improve fish passage and minimize water consumption.

Two Types of Fish Attractors Compared in Lake Tohopekaliga, Florida

Abstract Two types of fish attractors, one made from vitrified clay pipes and the other from cement blocks and brush, were investigated in Lake Tohopekaliga, Florida. Electrofishing, creel census, and experimental fishing were used to evaluate the effectiveness of attractors in concentrating fish and enhancing fishing success. Both attractors produced significantly higher fishing success than did control areas and were generally superior to the average fishing success elsewhere in the lake. Brush-block attractors yielded a slightly higher success rate than the pipe attractors. Fishing success at attractor sites was highest during the first year after installation. The lower fishing success in subsequent years appeared to have been at least partially the result of a lake level drawdown which temporarily reduced the standing crop of fish and stimulated expansion of the littoral zone into deeper areas which had been devoid of plants. Soybean meal was found to be a supplemental fish attractant which increased...

Studies on the schooling behavior of fish. V. Note on the dynamics of fish schooling.

A dynamical model for fish schooling is presented. The basic equation of motion of individual fish contains mutual attraction or repulsion of fish around its equilibrium position, frictional force due to locomotion, and the swimming force. The concept of an average time lag (“latency”) is introduced to the swimming force. As a result, the speed of school and the dimension of school obey the same dynamical equation correct to the first order of the time lag, and accordingly the corresponding frequency spectra behave in the same manner. The theoretical spectrum shows a minus four power law at large values of frequency. The cross-correlation between the change of the school form and the school speed has a time lag about one second on the positive side from the origin. These theoretical results compare favorably with the experimental results obtained in the previous studies.

Analysis of a natural chemical attractant for whiting Merlangius merlangus L. and cod Gadus morhua L. using a behavioural bioassay

1. 1. Behavioural bioassay for the analysis of active substances in chemical fish attractants is described. 2. 2. Unconditioned responses of cod and whiting to extracts of Arenicola indicated the stimulatory properties of a basic fraction, which contained glycine, serine, alanine, glutamic acid, valine, leucine and threonine. 3. 3. Of these amino acids only glycine and alanine evoked strong responses when tested individually at the concentrations found in Arenicola.

ChemInform Abstract: FISH ATTRACTANTS FROM MARINE INVERTEBRATES, ARCAMINE FROM ARCA ZEBRA AND STROMBINE FROM STROMBUS GIGAS

Chemischer InformationsdienstVolume 6, Issue 28 Natural Products ChemInform Abstract: FISH ATTRACTANTS FROM MARINE INVERTEBRATES, ARCAMINE FROM ARCA ZEBRA AND STROMBINE FROM STROMBUS GIGAS A. W. SANGSTER, A. W. SANGSTERSearch for more papers by this authorS. E. THOMAS, S. E. THOMASSearch for more papers by this authorN. L. TINGLING, N. L. TINGLINGSearch for more papers by this author A. W. SANGSTER, A. W. SANGSTERSearch for more papers by this authorS. E. THOMAS, S. E. THOMASSearch for more papers by this authorN. L. TINGLING, N. L. TINGLINGSearch for more papers by this author First published: July 15, 1975 https://doi.org/10.1002/chin.197528470Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume6, Issue28July 15, 1975 RelatedInformation

Chemical Attraction of some Marine Fish in their Natural Habitat

Using underwater television, photography, and fish traps the attractiveness of a number of natural baits and pure compounds to four species of marine fish was examined directly in their natural habitat. Winter flounders (Pseudopleuronectes americanus), mummichog (Fundulus heteroclitus), and Atlantic silversides (Menidia menidia) were each attracted by specific amino acids. Only flounders and killifish exhibited biting and digging behavior in the vicinity of the odor source. Hagfish (Myxine glutinosa) could be trapped using a variety of natural baits but no single amino acid or a variety of combinations of amino acids or amines was effective. The active principle(s) in cod muscle accounting for its attractiveness to hagfish was found to be heat stable, of small molecular weight and extractable with ethanol. Chromatographic separation of the ethanol extract resulted in only one active fraction consisting of several compounds. This fraction, however, accounted for only a small amount of the total activity in the ethanol extract, suggesting a multicomponent system.

Fish attractants from marine invertebrates: Arcamine from Arca Zebra and strombine from Strombus Gigas

The isolation and characterisation of two fish attractants, a new dipeptide (Arcamine, hypotauryl-2-carboxyglycine), 1 and Strombine (C-methyl-imino diacetic acid), 2 are described.

Attraction of Fishes to the Structure of Artificial Reefs

Attraction of Fishes to the Structure of Artificial Reefs

Attraction of Fishes to the Structure of Artificial Reefs

Attraction of Fishes to the Structure of Artificial Reefs

Attracting and Controlling Coastal Pelagic Fish with Nightlights

Abstract Field experiments were conducted in the northeastern Gulf of Mexico to evaluate techniques for using sequentially-operated lamp strings and moving lamps to lead and concentrate light-attracted coastal pelagic fishes. Fish were successfully led between sequentially-operated under-water lamps separated by distances up to 20 meters. Mobile lamps were used to lead fish distances up to approximately 1 kilometer. Fish aggregations which form daily around man-made structures were held after dark and led clear with moving lamps for capture by purse seine. A combination of nightlighting and man-made structure fish attraction techniques are proposed for harvesting coastal pelagic fish aggregations which occur around existing petroleton drilling platforms, well heads, and other areas presently inaccessible to conventional fishing gear.

Luring Behavior in the Scorpionfish, Iracundus Signifer

AbstractIn October, 1970, laboratory observations were conducted on fishes collected from the hull of a 12 meter boat which had remained on the ocean bottom in 70 meters of water for over five months. Included in the collection were three live specimens of the scorpionfish, Iracundus signifer Jordan and Evermann. These specimens displayed a type of luring behavior unlike any pattern described previously. Prior to feeding, the camouflaged scorpionfish raised its spinous dorsal fin and began snapping it from side to side in a characteristic fashion. Colors on the fin intensified during the display. The image of a small fish, complete with eye, mouth and dorsal fin, became visible on the fin. Prey fish, attracted within range, or at least distracted by the luring, were attacked by the scorpionfish and rapidly swallowed. The most comparative patterns in vertebrates are seen in the highly diversified angler-fishes, although members of the fresh water mussel family, Lampsilidae, display a similar lure in the attraction of host fishes for their larvae. The behavioral and morphological components of luring in I. signifer are seen individually among other members of the family Scorpaenidae, although none appear to have evolved a coordinated luring pattern closely similar to I. signifer. Experimental and observational data indicate that erection and movement of the lure may elicit a simple behavioral response, not directly related to the fishlike qualities of the lure. The evolution of this pattern is considered.

Wells Hydroelectric Project Fish Facilities

The development of the fish passage and fish spawning facilities for the Wells Hydroelectric Project is described. Because the spillway and powerhouse are combined into a single structure in the unique Hydrocombine concept conceived for the Wells Project, the conventional fish passage facilities could not be directly used at the Wells Project. A fish attraction system was developed by using submerged high velocity water jets at each end of the Hydrocombine to provide an attraction flow across the downstream face of the Hydrocombine. The jet locations and jet flow were developed from hydraulic model tests of the Hydrocombine structure. Two staircase type fish ladders are provided for passage of fish over the Hydrocombine, one ladder located at each end of the Hydrocombine. An extensive fish spawning facility was constructed immediately downstream from the west embankment of the dam. Located in the west fish ladder is a sorting facility for diverting selected fish to the spawning channel. A 150-acre artificial pond for rearing steelhead trout is constructed in the Wells Reservoir.

Development of Wells Hydroelectric Project

The low rock elevation was used to advantage by the development of a nonconventional design where the turbines were deeply submerged such that spillway openings could be located above the turbine water passages and between the generators. By locating fish attraction facilities and fish ladders into the end walls and locating the specially designed switchyard on the top deck, all requirements of a hydroelectric development on the Columbia River were provided in a single structure. Extensive hydraulic model tests were necessary to verify the proposed design especially the effect on turbine operation of the spillway discharging directly above the draft tube outlets. The single concrete structure, located in a flood plain, required minimum cofferdam construction and resulted in a number of advantages, in addition to less cost, as compared to a conventional arrangement. Detailed descriptions of the structural design, fish facilities, earth embankments and construction are contained in companion papers.

Attraction of Coastal Pelagic Fishes with Artificial Structures

Abstract Artificial structures positioned off Panama City, Florida, during July 1969 proved effective in attracting commercial quantities of round scad, Spanish sardines, and scaled sardines. The structures' position in the water column and their design were important in attracting fish. Midwater structures which resembled a small pup tent were effective in attracting up to 25 metric tons of fish and consistently attracted frown 1/2 to 5 metric tons daily. SCUBA divers made visual estimates of the number of each species present at the structures. We discuss the behavior of the fish and present a possible explanation of why fish are associated with submerged structures.

Fish Attraction with Pulsed Low-Frequency Sound

A series of tests were conducted to determine the effectiveness of pulsed low-frequency acoustic signals for attracting fishes. The acoustic signals were contrived to simulate the hydrodynamically generated disturbances normally associated with active predation. Underwater television was used to observe fish arrivals during both control and test periods. Demersal predatory fishes were successfully attracted although they habituated rapidly to the acoustic stimulus. Members of the families Serranidae, Lutjanidae, and Pomadasyidae were particularly well represented among the fishes attracted. Sharks were also attracted in considerable numbers. Herbivorous reef fishes, although common around the test site, were not attracted. Possible relationships between the test results and the hearing capabilities of fishes are discussed. It is concluded that acoustic attraction techniques have potential applications in certain existing commercial fisheries.

Field Experiments on the Attraction of Pelagic Fish to Floating Objects

Field Experiments on the Attraction of Pelagic Fish to Floating Objects

水中光源に關する研究

Underwater light sources are in general used in many places. in our country for fish attraction lamps, however, all of them are of very simple type being ordinary lamps pat under the surface. These lamps are not, therefore, suitable for the fishing nets without some radical improvement.Various underwater light sources for fish attraction lamps and sensitive underwater lux meters for measurment of light distributions by the light sources were made by the author.Present investgation concerns mainly underwater light sources for attraction of fish, and the application of this to a set-net was carried out off Cape Uomi, near Atami, Shizuoka Prefecture.

Fishing Apparatus Equipped with a Fish Attraction Lamp System

Fishing Apparatus Equipped with a Fish Attraction Lamp System