The Dimensions of the Gills of Fwo Species of Loach, Noemacheilus Barbatulus and Cobitis Taenia

1978 ◽  
Vol 76 (1) ◽  
pp. 181-184
Author(s):  
P.W.J. ROBOTHAM
Keyword(s):  
Body Weight ◽  
Freshwater Fish ◽  
Gill Filament ◽  
Fish Length ◽  
Secondary Lamellae ◽  
Gill Area ◽  
Gill Filaments ◽  
Cobitis Taenia ◽  
Relationship Of ◽  
Main Factor

The gill area to body weight relationship of two species of loach, Noemacheilus barbatuhu (L.) and Cobitis taenia (L.) was measured. It was found that the secondary lamellar area and the total length of the gill filaments were independently related to the lengths of the fish in each of the species. Both these measurements were similar in the two species. The number of secondary lamellae per mm of gill filament was independent of fish length, and was greater in C. taenia than in N. barbatuhu (45.5 and 36.4 respectively), being the main factor for the far greater total gill area/g calculated for C. taenia than for N. barbatuhis (507.9 and 316 mm2/g respectively). These gill area measurements are, in general, higher than those of other freshwater fish. It is suggested that this is related to the sedentary burrowing habits of the two species.

Gill Dimensions for Three Species of Tunny

1969 ◽  
Vol 51 (2) ◽  
pp. 271-285 ◽  
Author(s):  
B. S. MUIR ◽  
G. M. HUGHES
Keyword(s):  
Body Weight ◽  
Regression Line ◽  
Thunnus Albacares ◽  
Limited Data ◽  
Katsuwonus Pelamis ◽  
Secondary Lamellae ◽  
Gill Area ◽  
Mode Of Life ◽  
Gill Filaments ◽  
Secondary Lamella

1. Estimates have been made of the total area of the secondary lamellae in the gills of skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), and bluefin tuna (T. thynnus). A sampling method is described which takes into account the variation in size and spacing of the secondary lamellae in different portions of the sieve. 2. Twenty-six specimens in the weight range 1-40 kg. were examined and analysed by logarithmic plots of different gill dimensions against body weight. A good fit was found to the general equation A=aWb. 3. The slope (b) of the regression line for the total area (A) against body weight (W) was found to be about 0.85 for all three species. This relationship is similar to that (0.81) between oxygen consumption and body weight for a large number of species of teleost fish. 4. The corresponding regression coefficients for the relationships between body size and average area of a secondary lamella, number of secondary lamellae per millimetre and total filament length were +0.53, -0.08 and +0.38 respectively. 5. A comparison is made between the three species of tunny and the limited data available for size ranges of other teleosts. On the basis of values obtained by extra polating the regression lines, it is concluded that the tunny has a larger gill area per unit of body weight than any other fish so far investigated. This is mainly due to the large total length of the gill filaments and the very close spacing (up to 120 per mm. have been measured) of relatively small secondary lamellae. 6. It is concluded that the extensive gill area of the tunny is related to its very active mode of life.

Gill Dimensions as a Function of Fish Size

1969 ◽  
Vol 26 (1) ◽  
pp. 165-170 ◽  
Author(s):  
B. S. Muir
Keyword(s):  
Body Weight ◽  
General Equation ◽  
Published Data ◽  
Fish Size ◽  
Secondary Lamellae ◽  
Fish Weight ◽  
Gill Area ◽  
The Relationship

The relationship between total gill area and body weight can be expressed as Y + aWb where "b" varies from about 0.8 to 0.9 for different species. The area for a 1-g fish ("a") ranges 22-fold for published data on different species. Expressed by the same general equation, the number of secondary lamellae per millimeter of filament ranges 4-fold for different species and decreases with increasing fish weight within each species by a power of about −0.1.

Gill Morphometry of the Mudskipper, Boleophthalmus Boddarti

1986 ◽  
Vol 66 (3) ◽  
pp. 671-682 ◽  
Author(s):  
G. M. Hughes ◽  
N. K. Kadhomiy-Al
Keyword(s):  
Body Weight ◽  
Specific Area ◽  
Basic Structure ◽  
Growth Patterns ◽  
The Body ◽  
Average Weight ◽  
Filament Length ◽  
Morphological Studies ◽  
Secondary Lamellae ◽  
Gill Area

Measurements of gill dimensions in relation to body weight have been carried out in a mudskipper, Boleophthalmus boddarti. The data was analysed with respect to body weight using logarithmic transformations (log Y = log a + b log W). The slope (b) of the log/log regression lines for the gill area, total filament length, average number of secondary lamellae/mm, bilateral area of an average secondary lamella, and total gill area/g were 1·0496, 0·427, -0·229, 0·851 and 00496 respectively.These results indicate variations in growth patterns for the different dimensions of the gills. The analysis shows that the increase in gill surface area with the body size is mainly due to an increase in the area of individual secondary lamellae and, to a lesser extent, an increase in filament length and total number of lamellae.The average weight-specific area for 14 specimens measured (3·6–35·4 g) was 108–15 mm2/g. This value is consistent with results obtained with some other intertidal species.Marked differences were found in the thickness of the water/blood barrier, which is thinner around the marginal channels. Morphometric diffusing capacity taking this heterogeneity into account was estimated as 0·0208 ml O2 min1 mmHg−1 kg−1.INTRODUCTIONMorphological studies on the gills of many fish have shown adaptations of the basic structure which can be related to the particular mode of life. Among these adaptations, air-breathing species show many remarkable structural modifications (Munshi, 1976), which extend to the gills forming air sacs in species such as Heteropneustes fossilis (Hughes & Munshi, 1979). Fish which inhabit the intertidal zone, like other seashore animals, are subjected to periodic exposure to air, which may produce problems of water loss and reduction in support for the gills, with consequent collapse and restriction of gas exchange surfaces.

Respiratory gill surface area of a facultative air-breathing loricariid fish, Rhinelepis strigosa

1994 ◽  
Vol 72 (11) ◽  
pp. 2009-2015 ◽  
Author(s):  
C. T. C. Santos ◽  
M. N. Fernandes ◽  
W. Severi
Keyword(s):  
Surface Area ◽  
Body Mass ◽  
Gill Filament ◽  
B Value ◽  
Filament Length ◽  
Air Breathing ◽  
Rate Of Development ◽  
Secondary Lamellae ◽  
Gill Filaments ◽  
Gill Surface Area

The respiratory surface area of the gill in relation to body mass of the facultative air-breathing loricariid fish Rhinelepis strigosa was analyzed using logarithmic transformation (log Y = log a + b log W) of the equation Y = aWb. The data revealed differences in growth pattern for each gill element. The increase in gill surface area was not isometric with body mass (b = 0.76). The total number of secondary lamellae (b = 0.38) and the average bilateral surface area of the secondary lamellae (b = 0.46) contributed most to the rate of development of the gill surface area (total area of the secondary lamellae) with increase in body mass. Gill filament length (b = 0.339) was more important than the frequency (number/mm) of secondary lamellae in determining the increase in the total number of secondary lamellae. The number of gill filaments showed the lowest b value, 0.072. Rhinelepis strigosa has a larger gill surface area than most other air-breathing fish, indicating that it is better adapted for breathing in water than in air.

scholarly journals The Role of Snack Choices, Body Weight Stereotypes and Smoking Behavior in Assessing Risk Factors for Adolescent Overweight and Obesity

Foods ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 557
Author(s):  
Elena Raptou
Keyword(s):  
Body Weight ◽  
Smoking Behavior ◽  
Negative Influence ◽  
Overweight And Obesity ◽  
Individual Level ◽  
Level Data ◽  
Prevention Interventions ◽  
Frequent Consumption ◽  
Adolescent Overweight ◽  
Relationship Of

This study investigated the relationship of behavioral factors, such as snack choices, obesity stereotypes and smoking with adolescents’ body weight. Individual-level data for 1254 Greek youths were selected via a formal questionnaire. Snack choices seem to be gender specific with girls showing a stronger preference for healthier snacks. Frequent consumption of high-calorie and more filling snacks was found to increase Body Mass Index (BMI) in both genders. Fruit/vegetable snacks were associated with lower body weight in females, whereas cereal/nut snacks had a negative influence in males’ BMI. The majority of participants expressed anti-fat attitudes and more boys than girls assigned positive attributes to lean peers. The endorsement of the thin-ideal was positively associated with the BMI of both adolescent boys and girls. This study also revealed that neglecting potential endogeneity issues can lead to biased estimates of smoking. Gender may be a crucial moderator of smoking–BMI relationships. Male smokers presented a higher obesity risk, whereas female smokers were more likely to be underweight. Nutrition professionals should pay attention to increase the acceptance of healthy snack options. Gender differences in the influence of weight stereotypes and smoking on BMI should be considered in order to enhance the efficacy of obesity prevention interventions.

Spatial distribution of the parasite Kroyeria carchariaeglauci Hesse, 1879 (Copepoda: Siphonostomatoida: Kroyeriidae) on gills of the blue shark (Prionace glauca (L., 1758))

1987 ◽  
Vol 65 (5) ◽  
pp. 1275-1281 ◽  
Author(s):  
George W. Benz ◽  
Kevin S. Dupre
Keyword(s):  
Spatial Distribution ◽  
Natural Selection ◽  
Distribution Pattern ◽  
Surface Area ◽  
Blue Shark ◽  
Prionace Glauca ◽  
Homogeneous Groups ◽  
Secondary Lamellae ◽  
Gill Filaments ◽  
Gill Surface Area

Five blue sharks (Prionace glauca) were examined for gill-infesting copepods. Three species of siphonostomatoid copepods were collected: Gangliopus pyriformis, Phyllothyreus cornutus, and Kroyeria carchariaeglauci. The spatial distribution of K. carchariaeglauci was analyzed. The number of K. carchariaeglauci per shark was positively related to gill surface area and host size. Copepods were unevenly distributed amongst hemibranchs; flanking hemibranchs could be arranged into three statistically homogeneous groups. Female K. carchariaeglauci typically attached themselves within the middle 40% of each hemibranch; males were more evenly dispersed. Eighty percent of all K. carchariaeglauci attached themselves to secondary lamellae, the remainder were in the underlying excurrent water channels. Most K. carchariaeglauci were located between 10 and 25 mm along the lengths of gill filaments. Overall, the spatial distribution of K. carchariaeglauci was quite specific in all study planes. Explanation of this distribution is set forth in terms of natural selection pressures; however, the equally plausible explanation that the distribution pattern exhibited by these copepods is phylogenetically determined and may have little to do with contemporary selective constraints should not be ignored.

Morphometric study of trout gills: a light-microscopic method suitable for the evaluation of pollutant action

1976 ◽  
Vol 64 (2) ◽  
pp. 447-460
Author(s):  
G. M. Huges ◽  
S. F. Perry
Keyword(s):  
Quantitative Estimation ◽  
Control Fish ◽  
Morphometric Study ◽  
Diffusing Capacity ◽  
Estimation Of Parameters ◽  
Microscopic Method ◽  
Surface Areas ◽  
Secondary Lamellae ◽  
Gill Area ◽  
Polluted Waters

1. Methods are described for the morphometric estimation of parameters of the gill system of trout which are relevant to its function in gas exchange. The methods have been used with 1 mum sections viewed under the light microscope. 2. In particular the diffusion distances between water and blood are measured, which together with determinations of gill area, provide figures for the morphometrically estimated diffusing capacity. 3. The methods have been used to compare the diffusing capacity of gills from control fish and those treated in polluted waters. The concept of relative diffusing capacity (Drel) is introduced which enables comparisons to be made without the need to determine the absolute diffusing capacity. 4. Quantitative estimation of changes in relative volumes and surface areas of components of the secondary lamellae were determined, and employed to explain the possible anatomical causes of changes in Drel. 5. It is suggested that these methods can be of value in the comparison of the gills of fish treated in different waters.

scholarly journals Relationship of Sex, Age, and Body Weight to Broiler Carcass Yield and Offal Production

1993 ◽  
Vol 72 (6) ◽  
pp. 1137-1145 ◽  
Author(s):  
J. BRAKE ◽  
G.B. HAVENSTEIN ◽  
S.E. SCHEIDELER ◽  
P.R. FERKET ◽  
D.V. RIVES
Keyword(s):  
Body Weight ◽  
Carcass Yield ◽  
Relationship Of
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