scholarly journals The effects of turbulent eddies on the stability and critical swimming speed of creek chub (Semotilus atromaculatus)

2010 ◽  
Vol 213 (13) ◽  
pp. 2284-2293 ◽  
Author(s):  
H. M. Tritico ◽  
A. J. Cotel
Keyword(s):  
Swimming Speed ◽  
Critical Swimming Speed ◽  
Semotilus Atromaculatus ◽  
Turbulent Eddies ◽  
The Stability ◽  
Creek Chub

Comparison of the DNA of nuclei of rodlet cells and other cells in the chub Semotilus atromaculatus: hybridization in situ

1986 ◽  
Vol 64 (4) ◽  
pp. 801-804 ◽  
Author(s):  
D. L. Barber ◽  
J. E. Mills Westermann
Keyword(s):  
Dna Hybridization ◽  
Genomic Dna ◽  
Cell Types ◽  
Semotilus Atromaculatus ◽  
Different Temperatures ◽  
Hybridization In Situ ◽  
The Stability ◽  
Creek Chub ◽  
Rodlet Cells

With nick-translated genomic DNA of the northern creek chub, Semotilus atromaculatus, DNA–DNA hybridization of rodlet cells and cells known to belong to this species showed the same degree of labeling in the nuclei. The amount of hybridization for all cells was greater than that seen in chub cells treated with rainbow trout genomic DNA and than that found when other teleost, amphibian, human, or protozoan cells were treated with chub genomic DNA. Washing experiments at different temperatures also showed that the stability of the hybrids was comparable for both cell types. As a result, the nuclei of rodlet cells in this species are considered to contain qualitatively the same DNA as cells known to belong to the fish, and the rodlet cell itself, therefore, is of teleost origin.

Mechanisms responsible for the niche shift of brook charr, Salvelinus fontinalis Mitchill, when living sympatrically with creek chub, Semotilus atromaculatus Mitchill

1984 ◽  
Vol 62 (8) ◽  
pp. 1548-1555 ◽  
Author(s):  
Pierre Magnan ◽  
Gérard J. FitzGerald
Keyword(s):  
Laboratory Experiments ◽  
Salvelinus Fontinalis ◽  
Niche Shift ◽  
Intraspecific Aggression ◽  
Brook Charr ◽  
Semotilus Atromaculatus ◽  
High Level ◽  
Gill Raker ◽  
Creek Chub ◽  
Study Laboratory

When brook charr, Salvelinus fontinalis Mitchill, are in allopatry in oligotrophic Québec lakes, they feed largely on macrobenthic invertebrates. However, when brook charr cooccur with creek chub, Semotilus atromaculatus Mitchill, they feed largely on zooplankton. In the present study, laboratory experiments showed that creek chub were more effective than brook charr in searching for hidden, patchily distributed prey. The searching efficiency of an individual chub feeding in a group was improved through social facilitation. In contrast, the high level of intraspecific aggression observed in brook charr prevents the formation of such feeding groups. In the laboratory, brook charr were able to displace creek chub from the food source because of interspecific aggression. Data are presented showing that chub are morphologically better adapted than charr to feed on benthos (subterminal orientation of the mouth and protrusible premaxillae), while the charr are better adapted than chub to feed on zooplankton (gill raker structure). Differences in feeding behaviour, morphology, and relative abundance between these species appear to be important in the observed niche shift of brook charr in nature.

Effect of Morphological Fin-Curl on the Swimming Performance and Station-Holding Ability of Juvenile Shovelnose Sturgeon

2016 ◽  
Vol 7 (1) ◽  
pp. 198-204 ◽  
Author(s):  
David Deslauriers ◽  
Ryan Johnston ◽  
Steven R. Chipps
Keyword(s):  
Swimming Speed ◽  
Early Onset ◽  
Positive Relationship ◽  
Swimming Performance ◽  
Fork Length ◽  
Critical Swimming Speed ◽  
Pectoral Fin ◽  
Speed Test ◽  
Shovelnose Sturgeon ◽  
Pectoral Fins

Abstract We assessed the effect of fin-curl on the swimming and station-holding ability of juvenile shovelnose sturgeon Scaphirhynchus platorynchus (mean fork length = 17 cm; mean weight = 16 g; n = 21) using a critical swimming speed test performed in a small swim chamber (90 L) at 20°C. We quantified fin-curl severity using the pectoral fin index. Results showed a positive relationship between pectoral fin index and critical swimming speed indicative of reduced swimming performance displayed by fish afflicted with a pectoral fin index < 8%. Fin-curl severity, however, did not affect the station-holding ability of individual fish. Rather, fish affected with severe fin-curl were likely unable to use their pectoral fins to position their body adequately in the water column, which led to the early onset of fatigue. Results generated from this study should serve as an important consideration for future stocking practices.

scholarly journals Swimming Abilities of Temperate Pelagic Fish Larvae Prove that they May Control their Dispersion in Coastal Areas

Diversity ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 185 ◽  
Author(s):  
Baptista ◽  
Morais ◽  
Cruz ◽  
Castanho ◽  
Ribeiro ◽  
...  
Keyword(s):  
Swimming Speed ◽  
Physiological Condition ◽  
Fish Larvae ◽  
Coastal Areas ◽  
Critical Swimming Speed ◽  
Fish Stocks ◽  
Diplodus Sargus ◽  
Endurance Tests ◽  
Temperate Fish ◽  
The Relationship

The Sense Acuity and Behavioral (SAAB) Hypothesis proposes that the swimming capabilities and sensorial acuity of temperate fish larvae allows them to find and swim towards coastal nursery areas, which are crucial for their recruitment. To gather further evidence to support this theory, it is necessary to understand how horizontal swimming capability varies along fish larvae ontogeny. Therefore, we studied the swimming capability of white seabream Diplodus sargus (Linnaeus, 1758) larvae along ontogeny, and their relationship with physiological condition. Thus, critical swimming speed (Ucrit) and the distance swam (km) during endurance tests were determined for fish larvae from 15 to 55 days post-hatching (DPH), and their physiological condition (RNA, DNA and protein contents) was assessed. The critical swimming speed of white seabream larvae increased along ontogeny from 1.1 cm s−1 (15 DPH) to 23 cm s−1 (50 and 55 DPH), and the distance swam by larvae in the endurance experiments increased from 0.01 km (15 DPH) to 86.5 km (45 DPH). This finding supports one of the premises of the SAAB hypothesis, which proposes that fish larvae can influence their transport and distribution in coastal areas due to their swimming capabilities. The relationship between larvae’s physiological condition and swimming capabilities were not evident in this study. Overall, this study provides critical information for understanding the link between population dynamics and connectivity with the management and conservation of fish stocks.

scholarly journals Multiple areas of acute vision in two freshwater teleosts, the creek chub, Semotilus atromaculatus (Mitchill) and the cutlips minnow, Exoglossum maxillingua (Lesueur)

1994 ◽  
Vol 72 (4) ◽  
pp. 721-730 ◽  
Author(s):  
Shaun P. Collin ◽  
M. Ather Ali
Keyword(s):  
Ganglion Cell ◽  
Ganglion Cell Layer ◽  
Cell Layer ◽  
Resolving Power ◽  
Retinal Ganglion ◽  
Semotilus Atromaculatus ◽  
Upper Limits ◽  
Close Phylogenetic Relationship ◽  
Creek Chub ◽  
Freshwater Teleosts

The topography of Nissl-stained cells within the retinal ganglion cell layer is examined in two closely related freshwater teleosts from the family Cyprinidae. Regardless of the close phylogenetic relationship and the sympatric habitats of the two species, pronounced differences in the number and position of areas of increased cell density are observed in their retinae. in the creek chub, Semotilus atromaculatus, a midwater crepuscular feeder, three retinal specializations or areae centrales are identified in the dorsonasal, nasal, and temporal regions of the retina. In the cutlips minnow, Exoglossum maxillingua, a benthic diurnal feeder, two areae centrales are identified in temporal and nasal retina. The upper limits of the spatial resolving power of each species are calculated from the spacing of cells within the ganglion cell layer. Differences in the arrangement of isodensity contours appear to reflect the symmetry of each species' visual environment. The development and significance of up to three visually acute zones are discussed.

The relationship between specific growth rate and swimming performance in male fathead minnows (Pimephales promelas)

1995 ◽  
Vol 73 (11) ◽  
pp. 2165-2167 ◽  
Author(s):  
Alan S. Kolok ◽  
James T. Oris
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Swimming Speed ◽  
Specific Growth ◽  
Swimming Performance ◽  
Pimephales Promelas ◽  
Significant Negative Correlation ◽  
Fathead Minnows ◽  
Critical Swimming Speed ◽  
The Relationship

The objective of this study was to test the hypothesis that the specific growth rate of male fathead minnows (Pimephales promelas) was positively correlated with swimming performance. Subadult fish were allowed to grow into adults over a period of 31 – 55 days, after which the critical swimming speed of each fish was determined. Variation in critical swimming speed was substantial (greater than 50%), and a significant positive correlation was found between number of growing days and critical swimming speed, whereas a significant negative correlation was found between specific growth rate and critical swimming speed. A multiple regression using specific growth rate and number of growing days explained over 47% of the variation in swimming performance. Fathead minnows that grow fast are poor swimmers, suggesting a trade-off between swimming performance and specific growth rate in this species.

Growth, maturation, and apparent and absolute fecundity of creek chub, Semotilus atromaculatus (Mitchill), in the Kawartha Lakes Region, Ontario

1977 ◽  
Vol 55 (5) ◽  
pp. 843-846 ◽  
Author(s):  
P. M. Powles ◽  
Douglas Parker ◽  
Ronald Reid
Keyword(s):  
Growth Rate ◽  
Semotilus Atromaculatus ◽  
Absolute Fecundity ◽  
Weight Relationship ◽  
Creek Chub

No difference in growth rate occurred between two study streams, but male creek chub grew more rapidly than females, to a maximum reached at 7 years of age. Walfords were as follows: y = 4.8 TL + 0.810x, females; y = 3.5 TL + 0.792x, males. The length–weight relationship, W = −3.609 + 2.925 log L (TL), derived in the fall, was, as expected, somewhat below the spring relationship from an Illinois study. Kawartha creek chub M50 values were 6.0 TL ± 0.83 cm (males) and 6.54 ± 0.18 cm (females). Relative or apparent fecundity (fall egg count) was F = 71.9 + 136W and total or absolute fecundity (just before spawning) was virtually similar to other areas at F = 61.6 + 91.8W.

Sign in / Sign up

Export Citation Format

Share Document