scholarly journals Preliminary Understanding of Complexities in Swimming Performance of Common Minnow (Cyprinidae) Taxa

2018 ◽  
Vol 118 (2) ◽  
pp. 16 ◽  
Author(s):  
Crystal Nichols ◽  
Austin Smith ◽  
Stephen Huelsman ◽  
Cara Schemmel ◽  
Jason C. Doll ◽  
...  
Keyword(s):  
Swimming Performance ◽  
Practical Importance ◽  
Information Criterion ◽  
Invasive Potential ◽  
Total Length ◽  
Specific Effects ◽  
Lotic Environments ◽  
Pimephales Notatus ◽  
Management And Conservation ◽  
Fish Dispersal

Understanding swimming performance of native freshwater fishes has implications for ecology, conservation, and management. In particular, this type of information has practical importance for improving the understanding of fish dispersal, occurrence, migration, and invasive potential. The objective of this study was to characterize swimming performance of 2 taxa from the comparatively understudied minnow family (Cyprinidae) and test for potential drivers as a function of total length, sex, habitat, morphology, or some combination. The study assessed Spotfin Shiner (Cyprinella spiloptera; n = 66) and Bluntnose Minnow (Pimephales notatus; n = 24) populations from an ontogenic range of male and female individuals from lentic and lotic habitats in Indiana and Ohio. Akaike information criterion (AIC) model selection identified the most parsimonious linear regression model to predict swimming performance of Spotfin Shiner and Bluntnose Minnow independently. Overall, larger Spotfin Shiners were superior swimmers compared with smaller individuals. In both species, individuals having more streamlined heads and elongated caudal regions were better swimmers. Additionally, Spotfin Shiners that were collected from lotic environments were generally better swimmers than individuals from lentic environments. Models did not recover sex-specific effects in either species—or meaningful total length, or habitat effects, in Bluntnose Minnows. Overall, this study provides evidence of a complex series of swimming performance covariates when assessing or understanding performance. This has implications for aquatic population, assemblage, and community ecology as well as management and conservation efforts.

scholarly journals Morphometric and meristic characters of snow trout, Schizothorax labiatus, inhabiting the Jhelum River and its tributaries

2020 ◽  
Vol 28 (4) ◽  
pp. 216-224
Author(s):  
Kousar Jan ◽  
Imtiaz Ahmed
Keyword(s):  
Fish Species ◽  
Fork Length ◽  
Head Length ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Total Length ◽  
Linear Relationships ◽  
Jhelum River ◽  
High Degree ◽  
Management And Conservation

Abstract Schizothorax labiatus (McClelland) is considered to be one of the most economically important fish species among Schizothorax spp. A total of twenty-four morphometric and five meristic characters were examined; 18 of the morphometric characters as percentages of total length and four characters as percentages of head length were studied. It was found that the characters of standard length, fork length, pre pelvic length, pre anal length, and pre dorsal length had the highest correlations with total length, whereas dorsal fin height followed by caudal fin height had the lowest correlations. In percentages of head length post orbital length had the highest correlation whereas snout length had the lowest correlation. Overall, the results revealed that all the morphometric characters exhibited linear relationships and depicted significantly (P < 0.05) high degree of correlation, while the meristic characters counted were constant in all sizes of S. labiatus, indicating that they were independent of body size. The study provided basic information that will be useful for fish biologists and researchers in the future management and conservation of this fish species.

scholarly journals PARÁMETROS BIOLÓGICO-PESQUEROS DEL STRIPED CHUB (KYPHOSUS INCISOR) RELEVANTES PARA SU MANEJO Y CONSERVACIÓN EN EL PARQUE NACIONAL NATURAL OLD PROVIDENCE McBEAN LAGOON

2016 ◽  
Vol 44 (1) ◽  
Author(s):  
Mario Rueda ◽  
Vanburen Ward Bolívar ◽  
Diana Bustos Montes ◽  
Santiago Posada Osorio ◽  
Eddie Sanjuanelo ◽  
...  
Keyword(s):  
National Park ◽  
Size Composition ◽  
Size Selectivity ◽  
Total Length ◽  
Management Measures ◽  
Advanced Stages ◽  
Sources Of Variation ◽  
Mean Size ◽  
The Mean ◽  
Management And Conservation

Some parameters of the fiheries biology of Kyphosus incisor (yellow chub) were estimated from fiheries monitoring and a hand line and hook size selectivity experiment carried out in the Old Providence McBean Lagoon National Park from 2006 to 2012. Both monitoring and fihing experiment were conducted to obtain scientifi information for management and conservation of K. incisor, including the active participation of islander fiherman, which favored outcomes of interest to the management of the Park. Size range for fihes was 26.5-58.0 cm total length (TL), showing allometric growth [W (g) = 0.02 LT (cm) 2.95]. There was no statistically signifiant deviation from the 1:1 sex ratio. The mean size at maturity (MSM) for females was estimated at 47.4 cm TL (95% CI, 47.1 - 47.6 cm), whereas the proportion of advanced stages of maturity increased during the second half of year, which suggests that spawning peaks occur between December and March. Size composition of catch time series suggested that this species is harvested in sizes close to the MSM; however, the indicator (mean catch size /MSM) trend was growing. The selectivity experiment aimed at comparing the fih size caught by three different J-style hook sizes, standardizing other sources of variation, in order to determine the hook size that maximizes the probability of catching fih above the MSM (9 hook). Management and conservation measures of K. incisor obtained from this study are as follow: I) in the hypothetical case of a ban, it must be established consistent with the reproductive peak of the species, i.e. between December and March; II) minimum capture legal size should be between 47 and 48 cm total length, III) restrict the use of small hooks (10 or lower); IV) increase in fihing effort with the entry of new fihermen should not be allowed; V) process of management measures by fihing agreements with resource users should continue.

scholarly journals Length-based estimates of growth parameters and mortality rates of fish populations from a coastal zone in the Southeastern Brazil

2018 ◽  
Vol 35 ◽  
pp. 1-8
Author(s):  
Marcus Rodrigues da Costa ◽  
Rafael de Almeida Tubino ◽  
Cassiano Monteiro-Neto
Keyword(s):  
Coastal Zone ◽  
Growth Parameters ◽  
Linear Regression Analysis ◽  
Total Mortality ◽  
Mortality Rates ◽  
Fish Populations ◽  
Southeastern Brazil ◽  
Small Scale ◽  
Total Length ◽  
Management And Conservation

Small-scale fisheries in Brazil contribute to a significant share of total fish production, accessing a large variety of species. Life history parameters from these resources are important for their management and conservation, based on primary data. The objective of this article is to generate growth parameters and mortality rates of ten fish populations from a coastal zone in Southeastern Brazil. Monthly samples were taken between January 2011 and November 2014 from landings of the beach-seine fishery in an area adjacent to the entrance of the Guanabara Bay. All fishes were measured (total length) and weighed. The length-weight relationships (LWR) were estimated by linear regression analysis on log-transformed data of the equation: W = aLb. The Von Bertalanffy Growth Function (VBGF) was fitted to size-at-age data to obtain growth parameters (K, L∞). The length-converted catch curve was used for estimating the instantaneous total mortality (Z). Taylor’s equations provided an independent estimate of the natural mortality (M) and longevity. The difference between Z and M derived Fishing mortality (F). A total of 2,938 individuals from ten fish species were used to determine the length-weight relationships. Harengulaclupeola (Cuvier, 1829) has a new maximum length record for the FishBase LWR database. Sardinellabrasiliensis (Steindachner, 1879) presented the smallest and largest size recorded for LWR observed in the literature and FishBase database. Upeneusparvus showed the greatest total length, while Trichiuruslepturus Linnaeus, 1758, Orthopristisruber (Cuvier, 1830) and Dactylopterusvolitans (Linnaeus, 1758) presented the smallest sizes for LWR in FishBase. The other species showed parameters within the expected values for each group. The performance index combining information from K and L∞ presented values between 2.32 and 3.76 and were considered appropriate for the populations evaluated. Fishing was the primary source of mortality for Caranxcrysos (Mitchill, 1815), Eucinostomusargenteus Baird &amp; Girard, 1855, S.brasiliensis and U.parvus, and less important for Cynoscionjamaicensis (Vaillant &amp; Bocourt, 1883), D.volitans, O.ruber, Selenesetapinnis (Mitchill, 1815), T.lepturus and H.clupeola. The parameters generated may be used for the management and conservation of the species’ stocks.

scholarly journals Spawning Potential Ratio of Feather Back (Chitala Lopis) at Kampar River, Riau

Omni-Akuatika ◽  
2018 ◽  
Vol 14 (3) ◽  
Author(s):  
Andri Warsa ◽  
Endi Setiadi Kartamihardja ◽  
Arif Wibowo
Keyword(s):  
Mesh Size ◽  
Fish Stock ◽  
Limited Data ◽  
Total Length ◽  
The Poor ◽  
Spawning Potential Ratio ◽  
First Maturity ◽  
Management And Conservation

The feather back, Chitala lopis is an important economic fish, inhabit Kampar River and its population tend to decrease so that management and conservation efforts should be conducted.  Limited data of the feather back is one of the problems in formulating the management of the population. Spawning potential ratio (SPR) approach is an option being used in the management of the fish stock in the poor data. The study aimed to analysis spawning potential ratio of the feather back in Kampar River, Riau. The research has been conducted in May, August and October 2016. The total length at first capture (Lc) of feather back was less than the total length at first maturity (Lm) with the SPR value of 5 %. This condition could impact to decreasing the feather back stock. The SPR value should increased more than 20 % so the feather back population would been stable. Regulation of the fisheries was mainly limited mesh size of the gillnet operated should be applied.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Life History ◽  
Survival Rate ◽  
Southeastern United States ◽  
Freshwater Species ◽  
Limited Information ◽  
Total Length ◽  
Strong Relation ◽  
History Of ◽  
Estimate Population Size ◽  
Management And Conservation

<em>Abstract</em>.—The snail bullhead <em>Ameiurus brunneus</em> is a freshwater species found in fast-flowing streams and rivers in the southeastern United States. Although the snail bullhead is secure in Georgia and North Carolina, this species is considered at least vulnerable in other southeastern states where it resides. Limited information exists about life history and overall population structure of this species. In this study, our main goals were to use mark–recapture techniques to estimate population size of snail bullhead and to describe life history of this species in Nickajack Creek, Georgia. A Schnabel multiple census revealed that about 246 snail bullheads (>130 mm total length [TL]) resided within a short (0.7 km) segment of the creek. During the study, 33 of 34 recaptured fish were found at their original capture locations. A strong relation between weight and total length was observed for the population in fall 2007, spring 2008, and fall 2010 (<em>r</em> <sup>2</sup> = 0.98–0.99, <EM>P</EM> < 0.01). Overall, lengths of sampled fish ranged from 41 to 261 mm TL, with most fish between 101 and 174 mm. Ages of snail bullheads ranged from 1 to 8 years. A von Bertalanffy growth model was derived for the population (<EM>L</EM><sub>∞</sub> = 235 mm TL, <EM>K </EM>= 0.377, <em>t</em><sub><em>o</em></sub><em> </em>= –0.1). Catch-curve analyses indicated that snail bullheads had a 39.8% annual survival rate in fall 2007 and at a 43.9% survival rate in fall 2010. Our assessﾭment of this snail bullhead population should assist in management and conservation of this species.

Biology, Management, and Conservation of Lampreys in North America

2009 ◽  
Keyword(s):  
Swimming Performance ◽  
Migration Behavior ◽  
Performance Factors ◽  
Attachment Sites ◽  
Hydropower Dams ◽  
And Performance ◽  
And Migration ◽  
Management And Conservation ◽  
Insight Into

<em>Abstract</em>.—Both juvenile and adult anadromous lampreys encounter a variety of obstacles to passage during migration. Hydropower dams can delay or obstruct adults, and turbine entrainment or screen impingement can injure or kill juveniles. Lampreys also face less dramatic obstacles such as culverts, irrigation diversion dams and screens, weirs, and other low-elevation structures. The extent to which most structures affect juvenile and adult movements is not known. However, recent research on lamprey swimming performance and migration behavior has provided new insight into the physical and performance factors that may limit lamprey movements. We drew from both field and laboratory studies to review lamprey swimming performance and migration behavior and the effects of water velocity, attachment sites, light, and temperature on lamprey movements. Based on this review, we identified the following as primary research needs for all lamprey life stages: determination of cues lampreys use to orient during migration, documentation of lamprey endurance limits, and evaluation of energy expenditure during migration and its effects on lamprey fitness.

Size structure, sex ratio, and condition factor of the pink shrimp Penaeus (Farfantepenaeus) notialis Pérez Farfante, 1967 (Decapoda: Dendrobranchiata: Penaeidae) in the Colombian Caribbean

2019 ◽  
Vol 40 (2) ◽  
pp. 172-175
Author(s):  
Argiro Ramírez ◽  
Jorge Paramo
Keyword(s):  
Sex Ratio ◽  
Condition Factor ◽  
Size Structure ◽  
Conservation Strategies ◽  
Pink Shrimp ◽  
Allometric Growth ◽  
Total Length ◽  
Length Relationship ◽  
Sustainable Fishery ◽  
Management And Conservation

Abstract We determined size structure, sex ratio, and condition factor for the pink shrimp, Penaeus notialisPérez Farfante, 1967 in the Caribbean coast of Colombia, information essential for the design of management and conservation strategies to ensure a sustainable fishery. Total length (TL; ± 0.01 mm) ranged from 79.47 to 192.80 mm TL (mean 148.21 ± 17.75) for females and 79.00–181.83 mm TL (mean 122.52 mm ± 12.55) for males. Statistically significant differences (P &lt; 0.01) in size and weight (± 0.1 mg) between sexes were found year-round; males were smaller and weighed less than females. The sex ratio showed significant differences (P &lt; 0.01) between the total number of females and males per total length class when compared with a 50% sex ratio. The monthly sex ratio showed significant differences between the number of females and males. The weight-length relationship showed positive allometric growth (b = 3.118) for females, whereas negative allometric growth (b = 2.663) was observed for males. The condition factor (K) ranged 0.0002–0.0023 (mean 0.0009 ± 0.0007) for females and 0.0005–0.2179 (mean 0.0316 ± 0.0642) for males.

scholarly journals Size-related effects and the influence of metabolic traits and morphology on swimming performance in fish

2020 ◽  
Vol 66 (5) ◽  
pp. 493-503 ◽  
Author(s):  
Francesc Rubio-Gracia ◽  
Emili García-Berthou ◽  
Helena Guasch ◽  
Lluís Zamora ◽  
Anna Vila-Gispert
Keyword(s):  
Energy Metabolism ◽  
Metabolic Rate ◽  
Body Mass ◽  
Fish Species ◽  
Predictive Models ◽  
Swimming Performance ◽  
Lepomis Gibbosus ◽  
Cost Of Transport ◽  
Metabolic Traits ◽  
Total Length

Abstract Energy metabolism fuels swimming and other biological processes. We compared the swimming performance and energy metabolism within and across eight freshwater fish species. Using swim tunnel respirometers, we measured the standard metabolic rate (SMR) and maximum metabolic rate (MMR) and calculated the critical swimming speed (Ucrit). We accounted for body size, metabolic traits, and some morphometric ratios in an effort to understand the extent and underlying causes of variation. Body mass was largely the best predictor of swimming capacity and metabolic traits within species. Moreover, we found that predictive models using total length or SMR, in addition to body mass, significantly increased the explained variation of Ucrit and MMR in certain fish species. These predictive models also underlined that, once body mass has been accounted for, Ucrit can be independently affected by total length or MMR. This study exemplifies the utility of multiple regression models to assess within-species variability. At interspecific level, our results showed that variation in Ucrit can partly be explained by the variation in the interrelated traits of MMR, fineness, and muscle ratios. Among the species studied, bleak Alburnus alburnus performed best in terms of swimming performance and efficiency. By contrast, pumpkinseed Lepomis gibbosus showed very poor swimming performance, but attained lower mass-specific cost of transport (MCOT) than some rheophilic species, possibly reflecting a cost reduction strategy to compensate for hydrodynamic disadvantages. In conclusion, this study provides insight into the key factors influencing the swimming performance of fish at both intra- and interspecific levels.

scholarly journals Invasive Potential of Nile Tilapia, Oreochromis Niloticus (Linnaeus, 1758) From the Tributary of the Ganga River, Central India

2021 ◽  
pp. 1-5
Author(s):  
Amitabh Chandra Dwivedi ◽  
◽  
Priyanka Mayank ◽  
Keyword(s):  
Oreochromis Niloticus ◽  
Uttar Pradesh ◽  
Central India ◽  
Size Composition ◽  
Size Group ◽  
Invasive Potential ◽  
Wild Stock ◽  
Total Length ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Large Water

The natural fishery or wild stock of fishes especially fresh water in India is significantly declining due to manmade stressors. The invasion of fishes and size composition are an essential component of stream, river and other large water bodies ecosystem and represents an evident of structure, function, depth and health of stream/river. During study period 683 specimens of Oreochromis niloticus were collected from February 2019 to January 2020 in Sirsa fish landing centre from the lower stretch of the Tons river at Prayagraj, Uttar Pradesh, India. Size composition of fishes was varied from 82 to 463 mm (total length). The maximum total length of O. niloticus in the catches indicated that its increasing colonisation success in the river Tons. Size composition of fishes was also indicated that the stock of O. niloticus in the Tons river was in healthy condition. The 231-260 mm size group was most dominated (15.67%) compared to 261-290 mm (12.44%) and 291-320 mm (11.71%) in the total exploited stock. The middle size group was maximum exploited with 51.24% from the Tons river at Prayagraj. Higher size group contributed sizeable proportion with 25.04% in the exploited stock. The exploitation pattern was unsystematic in higher size group due to contribution of higher proportion. Current exploitation pattern is unsystematic but O. niloticus is powerfully invaded from the lower stretch of the Tons river at Prayagraj.

scholarly journals Hydraulic flow resistance of epigean and hypogean fish of the family Trichomycteridae (Ostariophysi, Siluriformes)

2020 ◽  
Vol 35 ◽  
pp. 97-110
Author(s):  
Francisco Alexandre Costa Sampaio ◽  
Marina Silva Rufino ◽  
Paulo Santos Pompeu ◽  
Hersília de Andrade е Santos ◽  
Rodrigo Lopes Ferreira
Keyword(s):  
Fish Species ◽  
Critical Speed ◽  
Flow Resistance ◽  
Swimming Performance ◽  
Water Velocity ◽  
Hydraulic Flow ◽  
Seasonal Flooding ◽  
Total Length ◽  
The Family ◽  
High Flows

Critical swimming speeds of four trichomycterid fish species from epigean and hypogean environments were analyzed and compared: Trichomycterus itacarambiensis and Ituglanis passensis, both troglobitic from underground rivers; Trichomycterus brasiliensis, from epigean rivers; and Ituglanis sp., an undescribed troglophilic species from an underground stream. Swimming tests were conducted with a non-volitional apparatus in which fish swim against a progressive incremental water velocity until they longer resist the flow. Total length was significantly related to critical speed for only T. itacarambiensis. The critical speed obtained by each species, in decreasing order, with values in lengths per second (lengths/s), were: I. passensis (3.61), T. itacarambiensis (3.49), T. brasiliensis (3.11) and Ituglanis sp. (1.89). Swimming performance differed between the congeners T. itacarambiensis and T. brasiliensis, but did not differed between I. passensis and Ituglanis sp. The greater speed for the troglobitic species compared to that of the troglophilic and epigean species is probably related to seasonal flooding pulses that can be extremely severe in caves. Furthermore, during the tests, fish were observed using their mouth and/or barbels to fasten themselves to the substrate to avoid high flows.

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