Aggregations of Spottail Shiners and Yellow Perch

1969 ◽  
Vol 26 (6) ◽  
pp. 1672-1676 ◽  
Author(s):  
J. R. Nursall ◽  
Morley E. Pinsent
Keyword(s):  
Shallow Water ◽  
Yellow Perch ◽  
Perca Fluviatilis ◽  
Northern Pike ◽  
Total Length ◽  
Perch Perca Fluviatilis ◽  
Fish Predators ◽  
Beaver Lake

Spottail shiners (Notropis hudsonius (Clinton)) and immature yellow perch (Perca fluviatilis Linnaeus), ranging in size from 30 to 110 mm, total length, aggregate in shallow water in Beaver Lake, Alberta. The ratio of number of shiners to that of perch is about 1.5:1. Perch larger than 110 mm leave the aggregation. Eventually they will prey on it from below. Other predators include northern pike and walleye, which lie below the aggregation, and terns and gulls from above. Shiners in the aggregation are 10 times more likely to be taken by fish predators than are perch.

Some remarks on the ecology of Echinorhynchus salmonis Muller 1784

1970 ◽  
Vol 48 (2) ◽  
pp. 317-321 ◽  
Author(s):  
Shibru Tedla ◽  
C. H. Fernando
Keyword(s):  
Yellow Perch ◽  
Rapid Development ◽  
Perca Fluviatilis ◽  
Early Summer ◽  
Late Winter ◽  
Breeding Cycle ◽  
Intermediate Hosts ◽  
Egg Maturation ◽  
Perch Perca Fluviatilis ◽  
Bodies Of Water

The acanthocephalan Echinorhynchus salmonis showed a marked seasonality of occurrence in the yellow perch Perca fluviatilis in the Bay of Quinte, Lake Ontario. The incidence of the parasite started increasing in autumn and reached a peak in late winter. It started decreasing in March and fell to zero in August or September. Such seasonality has been previously observed for acanthocephalans in bodies of water which freeze, as does the Bay of Quinte. There is a single egg maturation period for the parasite in early summer, after which the parasites die. Infestation of intermediate hosts occurs in spring when the population of the hosts is high. The subsequent warm period ensures rapid development of the parasite. Within the fish the parasite is less affected by the lower temperatures prevailing in winter. No influence was apparent between the maturity and seasonality of the parasite and the food and breeding cycle of the fish.

DNA adducts and histopathological lesions in perch (Perca fluviatilis) and northern pike (Esox lucius) along a polycyclic aromatic hydrocarbon gradient on the Swedish coastline of the Baltic Sea

1998 ◽  
Vol 55 (4) ◽  
pp. 815-824 ◽  
Author(s):  
G Ericson ◽  
E Lindesjöö ◽  
L Balk
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Dna Adducts ◽  
Perca Fluviatilis ◽  
Head Kidney ◽  
Northern Pike ◽  
Esox Lucius ◽  
Pike Esox Lucius ◽  
Perch Perca Fluviatilis ◽  
Polycyclic Aromatic

DNA adducts, histopathological abnormalities, and organosomatic indices were used to study contaminant effects on fish along a polycyclic aromatic hydrocarbon (PAH) gradient, leading away from an aluminum smelter on the Swedish Baltic coast. The level of DNA adducts, analysed using the 32P-postlabelling method, was at least 145 times higher in the liver of female perch (Perca fluviatilis) from the innermost site on the gradient, closest to the suspected point source of PAHs, than at a distant reference site. Of the DNA adducts analysed, a relatively small number accounted for a very high proportion of the total level of adducts (30-60% at the innermost site and close to 100% at the outermost site). These particular adducts could also be observed in extrahepatic tissues, such as trunk kidney and head kidney, along the entire gradient. Similar patterns of adducts were also observed in northern pike (Esox lucius). Focal hepatocellular degeneration in perch was about 15 times more extensive at the innermost site than at the next site in the gradient and absent in perch from the two outermost sites. Body size relative to age was also significantly reduced in perch from the three innermost sites compared with the outermost site.

scholarly journals Biological Characteristics of European Perch (Perca fluviatilis L., 1758) Inhabiting Lake Ladik (Samsun, Turkey)

2016 ◽  
Vol 74 (4) ◽  
pp. 141-148 ◽  
Author(s):  
Semra Saygin ◽  
Savas Yilmaz ◽  
Okan Yazicioglu ◽  
Nazmi Polat
Keyword(s):  
Standard Length ◽  
Condition Factor ◽  
Fork Length ◽  
Perca Fluviatilis ◽  
Growth Equation ◽  
European Perch ◽  
Total Length ◽  
Length Standard ◽  
Perch Perca Fluviatilis ◽  
Von Bertalanffy Growth Equation

AbstractThe aim of this study was to determine the growth features of European perch (Perca fluviatilis L., 1758) inhabiting Lake Ladik. A total of 858 individuals were caught. The total length and weight ranged from 8.2 to 27.5 cm and from 7.16 to 365.20 g, respectively. The age of the females ranged between 1 and 7 years and the age of the males ranged from 1 to 5 years. The female to male ratio was 1:0.19. The von Bertalanffy growth equation parameters were determined as L∞=41.27 cm, W∞=1251.40 g, K=0.10 (year−1), t0 (year)=−1.98 for all samples. Length-weight relationship was calculated as W=0.0047TL3.358 for all specimens. Length-length relationships (total length-standard length, total length-fork length, standard length-fork length) were highly significant (r2>0.98). The mean condition factor value was obtained as 1.28 for all fish. Condition factor showed statistically significant increase according to length classes.

Changes in Fish Mercury Concentrations in an Intensively Fished Lake

1990 ◽  
Vol 47 (10) ◽  
pp. 1888-1897 ◽  
Author(s):  
Matti Verta
Keyword(s):  
Growth Rate ◽  
Perca Fluviatilis ◽  
Anguilla Anguilla ◽  
Rutilus Rutilus ◽  
Northern Pike ◽  
Top Predator ◽  
Roach Rutilus Rutilus ◽  
Perch Perca Fluviatilis ◽  
High Mercury ◽  
Total Fish

A small polyhumic lake inhabited by northern pike (Esox lucius), burbot (Lota lota), perch (Perca fluviatilis), roach (Rutilus rutilus), and eel (Anguilla anguilla) was fished intensively during spring 1984 and 1985 to lower the high mercury levels in the top predator, northern pike. A total catch of 29.5 kg∙ha−1 (74% roach) was removed which represented about 50% of the total fish biomass. Mercury concentrations in burbot, large pike, and small roach had decreased by 1987 and 1988, but increased in young pike and some perch. Northern pike had the clearest increase in growth rate, while that of perch and roach levelled off within 3 yr at the prefishing level. Only a small increase in growth rate of burbot occurred. The yearly accumulation of mercury in northern pike remained constant, and the decrease in [Hg] was apparently due to growth dilution. The decrease in [Hg] of burbot and roach is explained by a switch to a diet with lower [Hg] or a decrease in water methylmercury concentrations. The amount of methylmercury removed from the lake by fishing was equivalent to several years of calculated mercury methylation and accumulation in the fish. Overfishing may be a feasible means of lowering methylmercury levels in this type of oligotrophic lake.

Morphology, Physiology, Behavior, and Ecology of Perca fluviatilis L. and P. flavescens Mitchill

1977 ◽  
Vol 34 (10) ◽  
pp. 1504-1514 ◽  
Author(s):  
J. E. Thorpe
Keyword(s):  
Yellow Perch ◽  
Perca Fluviatilis ◽  
Gonadal Development ◽  
Light Responses ◽  
Total Food ◽  
As Species ◽  
Fish Predators ◽  
Spawning Time ◽  
Effects Of Temperature ◽  
First Maturity

A review of literature on Perca fluviatilis and P. flavescens indicated one difference (in the position of the predorsal bone) sufficient to maintain their separateness as species. Otherwise they are overwhelmingly equivalent biologically. Their distributions are limited by the same effects of temperature, current speed, salinity, and dissolved oxygen. They are similar in gonadal development and age at first maturity; in the effects of water temperature and latitude on spawning time, and of environmental fertility on fecundity; in spawning behavior, fecundity, and the course of larval development. Growth capacities are similar and their expression subject to population density and temperature in the same way. Both species are adapted to a diet of small live animals, but will take whatever is available; cannibalism is characteristic, and may begin at the same early feeding stage. The two species show similarities in diurnal periodicity of feeding and in total food consumption. They also have the same pattern of development of light responses, of schooling, of activity and of daily and seasonal migrations. Within the fish community they fulfill the same role as converters of invertebrate foods into a form suitable for consumption by terminal fish predators, especially Stizostedion spp., influencing the population dynamics of their predators in similar ways. Key words: Percidae, morphology, physiology, ecology, Perca, life history, growth, reproduction, yellow perch, Eurasian perch

Changes in Fish Community of Klíčava Reservoir with Particular Reference to Eurasian Perch (Perca fluviatilis), 1957–72

1977 ◽  
Vol 34 (10) ◽  
pp. 1734-1747 ◽  
Author(s):  
Juraj Holčík
Keyword(s):  
Fish Community ◽  
Fish Fauna ◽  
Perca Fluviatilis ◽  
Northern Pike ◽  
Zooplankton Biomass ◽  
Fish Biomass ◽  
Biomass Density ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis ◽  
Stizostedion Lucioperca

Soon after the 1955 filling of the 60 ha mesotrophic Klíčava Reservoir in Czechoslovakia, the fish fauna started to change. Generally, lithophils were replaced by phytophils and then by ecologically more plastic species. Fish biomass increased in the first 12 yr from 65 to 236 kg/ha, but after 1967 dropped to about 170 kg/ha. Increased biomass and density of piscivores were responsible for the decline. Among the piscivores the most important role was played by the pikeperch (Stizostedion lucioperca) rather than the Eurasian perch (Perca fluviatilis) or northern pike (Esox lucius). Cyclical changes in the age structure of the perch population and the periodical occurrence of many young resulted from fluctuations in the rate of cannibalism, which affected the density of the fry and yearlings. A decline in zooplankton biomass and disappearance of larger zooplankters in the first 5–6 yr of the reservoir were due to increased density of fish, especially perch, which fed on zooplankton. Synchronous predation by piscivores and zooplanktivores produced a nearly stable zooplankton biomass in the later years of the reservoir. The perch is a highly specialized species which behaves in the fish community more or less autonomously, because it is able to control its own density in accord with its food resources. The above conclusions are based on a literature review and analyses of new data. Key words: Percidae, community ecology, Perca, biomass, density, production, predation

Ontogenetic Changes in the Distribution of Larval and Juvenile Yellow Perch (Perca flavescens): A Response to Prey or Predators?

1988 ◽  
Vol 45 (10) ◽  
pp. 1820-1826 ◽  
Author(s):  
John R. Post ◽  
Donald J. McQueen
Keyword(s):  
Yellow Perch ◽  
Perca Flavescens ◽  
Perca Fluviatilis ◽  
Distribution Patterns ◽  
Nearshore Zone ◽  
Ontogenetic Changes ◽  
European Perch ◽  
Perch Perca Fluviatilis ◽  
Selective Forces ◽  
Predator Abundance

Distribution of larval and juvenile yellow perch (Perca flavescens) in Lake St. George, Ontario, changed during development as follows: (1) early in development, the larvae were distributed exclusively offshore, both day and night; (2) larger larvae and juveniles migrated nearshore to offshore at dusk, returning the the nearshore zone at dawn; (3) the extent of this migration weakened as the fish grew, and they spent a greater porportion of their time nearshore and did not migrate as far at night; and (4) by the time juveniles reached approximately 30 mm total length, they were distributed exclusively in the nearshore habitat both day and night. Analysis of published reports on distribution patterns of larval and juvenile yellow perch and the European perch (Perca fluviatilis) suggests that the ontogenetic distribution patterns observed in Lake St. George are typical for the two Perca species. This regularity amongst lakes in ontogenetic distribution pattern occurred despite variation in the selective forces of prey and predator abundance in nearshore and offshore habitats. We conclude that the changes in distribution throughout early development are not in response to the proximate selective forces of prey abundance or predation risk

Some Behavioral Interactions of Spottail Shiners (Notropis hudsonius), Yellow Perch (Perca flavescens), and Northern Pike (Esox lucius)

1973 ◽  
Vol 30 (8) ◽  
pp. 1161-1178 ◽  
Author(s):  
J. R. Nursall
Keyword(s):  
Yellow Perch ◽  
Perca Flavescens ◽  
Northern Pike ◽  
Esox Lucius ◽  
Behavioral Interactions ◽  
Change Of Direction ◽  
Pike Esox Lucius ◽  
Glide Path ◽  
Beaver Lake ◽  
Young Of The Year

Dense schools of spottail shiners (Notropis hudsonius) are common in shallow water in Beaver Lake, generally 0.25–0.30 m below the surface, with smaller individuals more numerous towards the top. Position in the shcool is maintained by short radius behavior. The course of an individual is maintained by a beat of the tail, a glide, a hesitation, and a change of direction. Each glide path represents the chord of an arc of short radius about some neighbor. Shiners respond to disturbance by flash expansion of loose cruising association. Schooling is obligatory. The black caudal spot is probaly multifunctional as a recognition mark and releaser.Yellow perch (Perca flavescens) show an ontogeny of behavior through young-of-the-year, aggregation-sized perch (aggp), subadults, and adults. They behave as individuals or associate as streams. Disturbance will cause a group of aggp to disperse or to stream. The adult manifestation of streaming is pack-hunting. The activity of one perch attracts the attention of others; this leads to streaming or pack-hunting. Pack-hunting improves the chance of some members of the pack, not necessarily the initiator, capturing active prey, by countering the allaesthetic protean escape reactions of organisms such as the spottail shiner. Large mixed aggregations of spottail shiners and aggp are fortuitous.Northern pike (Esox lucius) are lone, opportunistic predators whose hunting technique combines in sequence motionlessness, axial tracking, and lunging. Prey may be swallowed head- or tailfirst, or sideways.The species studied here show a range of gregariousness, from the solitary pike, through the facultative nonpolarized and polarized schools of perch, to obligate nonpolarized and polarized schools of shiners.

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