Growth and early sexual maturation in Baltic salmon (Salmo salar) parr

1992 ◽  
Vol 70 (2) ◽  
pp. 205-211 ◽  
Author(s):  
Ingemar Berglund
Keyword(s):  
Growth Rate ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Specific Growth ◽  
Gonadal Development ◽  
Feeding Rates ◽  
Gonadal Growth ◽  
Hatchery Stock ◽  
Size At Age ◽  
The Relationship

The relationship between sexual maturation and growth in Baltic salmon (Salmo salar) parr was studied in hatchery stock originating from the Umeälven (Ume River) in northern Sweden. The probability that a male parr would mature sexually at age 1 + was positively related to its size at the start of the experiment at age 0+. The specific growth rate and condition factor of maturing and nonmaturing males were similar until the onset of gonadal growth, when the growth rate of maturing males decreased. Sibling groups of immature parr were fed different rations during the 3 weeks prior to the start of gonadal development. The incidence of sexual maturation in the groups given different rations was linearly related to the growth rate during the period of different feeding rates. This study suggests that both the size at age 1, resulting from the growth rate during the first summer, and the opportunity for growth during the period preceding the onset of gonadal growth affect the incidence of maturation in male parr of age 1 +.

scholarly journals Performance of fat snook juveniles reared at different temperatures

2018 ◽  
Vol 40 (1) ◽  
pp. 39766
Author(s):  
Daniel Correia ◽  
Luiz Henrique Castro David ◽  
Sara Mello Pinho ◽  
João Costa-Filho ◽  
Maurício Gustavo Coelho Emerenciano ◽  
...  
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Specific Growth ◽  
Survival Rates ◽  
Feeding Rates ◽  
Feed Conversion ◽  
Final Weight ◽  
Different Temperatures ◽  
Water Recirculation ◽  
Fat Snook

We aimed at evaluating the effects of different water temperatures on the zootechnical performance of fat snook. The experiment lasted for 60 days, which was conducted in water recirculation systems, and was randomly designed with three treatments and three replicates each, corresponding to three water temperatures (25, 28 and 31°C). A total of 225 fat snook juveniles with a mean weight of 6.45 ± 0.58 g were used, which were fed daily until apparent satiety. Zootechnical parameters were assessed and feeding rates were registered for each tested temperature. Survival rates varied from 96 to 100% among treatments. Higher values of standard and total length, and weight gain were found in 28 and 31°C (p < 0.05). With regard to final weight, final biomass, feed conversion and specific growth rate, no significant differences were observed (p > 0.05). Feeding rates did not differ among evaluated temperatures. The results show that the used temperatures did not negatively affect zootechnical performance of fat snook juveniles. 

scholarly journals Genome-Wide Association Study (GWAS) for Growth Rate and Age at Sexual Maturation in Atlantic Salmon (Salmo salar)

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119730 ◽  
Author(s):  
Alejandro P. Gutierrez ◽  
José M. Yáñez ◽  
Steve Fukui ◽  
Bruce Swift ◽  
William S. Davidson
Keyword(s):  
Growth Rate ◽  
Atlantic Salmon ◽  
Association Study ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Atlantic Salmon Salmo Salar ◽  
Genome Wide

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.

Population structure, growth, and sexual maturation of short-finned squid (Illex illecebrosus) at Newfoundland

1997 ◽  
Vol 54 (1) ◽  
pp. 137-146
Author(s):  
E G Dawe ◽  
P C Beck
Keyword(s):  
Growth Rate ◽  
Population Structure ◽  
Linear Model ◽  
Sexual Maturation ◽  
Gonad Development ◽  
Age And Growth ◽  
Late Time ◽  
Length Range ◽  
Size At Age ◽  
Positive Effect

We describe size at age, growth, and population structure of short-finned squid (Illex illecebrosus) from Newfoundland waters during 1990. Ages were estimated from statolith increment counts and used to back-calculate hatching dates. Hatching ranged between December and June with the hatching months of March to May predominating. Constant interchange of individuals in the inshore population was evident in that the modal month of hatching progressed from March within the earliest (July) sample to May within the latest (November) sample. Within the mantle length range available, growth was adequately expressed by a linear model. Females grew faster than males, and during the March to May months of hatching, length at age and growth rate increased with hatching month. This positive effect of late time of hatching was also seen in growth in mass and in gonad development and sexual maturation.

scholarly journals PERBANDINGAN PERTUMBUHAN DAN PERKEMBANGAN GONAD IKAN MAS (Cyprinus carpio Linn.) DIPLOID DAN TETRAPLOID

2007 ◽  
Vol 13 (1) ◽  
pp. 27-32
Author(s):  
Akhmad Taufiq Mukti
Keyword(s):  
Growth Rate ◽  
Data Analysis ◽  
Heat Shock ◽  
Specific Growth Rate ◽  
Common Carp ◽  
Specific Growth ◽  
Descriptive Analysis ◽  
Relative Length ◽  
Gonadal Development ◽  
Length Growth

The aim of this study were to know growth and gonadal development of tetraploidy common carp. The method that used in this study was experiment. Treatment that used was tetraploidyzation by heat shock 40°C during 1.5 minutes of common carp eggs to 29 minutes after fertilization. Five replicates were carried out for treatment. Parameters test were relative length growth (h), specific growth rate (SGR) and gonadal development of common carp. Data analysis that used was descriptive analysis. The result of this study indicated that tetraploidization teratment influenced on growth and gonadal development of common carp. The relative length growth of tetraploidy common carp was 5.38 ± 0.12 (30-days) and 19.12 ± 0.00 (110-days), as their specific growth rate was 19.87 ± 0.10 percent BW/day (30-days) and 8.57 ± 0.00 percent BW/day (110-days). Tetraploidy common carp have fertile characteristic and show gonadal development that same with diploid common carp relatively.

Effects of N/P Atomic Ratio on the Growth of Alexandrium Tamarense at Various Initial Phosphate Concentrations

2012 ◽  
Vol 455-456 ◽  
pp. 1289-1296
Author(s):  
Shi Yong Wen ◽  
Dong Zhi Zhao ◽  
Li Li Song ◽  
Hua Long
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Cell Density ◽  
Specific Growth ◽  
Red Tide ◽  
Atomic Ratio ◽  
Maximum Specific Growth Rate ◽  
Alexandrium Tamarense ◽  
Nutrient Input ◽  
The Relationship

To reveal the relationship between nutrient input and red tide outbreaks, the effects of N/P atomic ratio on the specific growth rate of Alexandrium tamarense is analyzed under various initial phosphate concentrations in laboratory cultures. The results show that both the cell density and the specific growth rate of A.tamarense first increased when the N/P atomic ratio ≤ (N/P)opt and then decreased when the N/P atomic ratio ≥ (N/P)opt in low-P-grown cultures, followed by those in medium-P-grown and high-P-grown cultures. And the highest cell density in low-P-grown, medium-P-grown, and high-P-grown cultures is 1776×104, 4094×104 and 6891×104 cells/L, respectively. The maximum specific growth rate is 4.022, 5.307 and 9.672 d-1, respectively. It seems that the higher the initial phosphate concentrations, the greater the probability of red tide outbreaks.

scholarly journals MULTIPLE-LOCUS HETEROZYGOSITY AND THE PHYSIOLOGICAL ENERGETICS OF GROWTH IN THE COOT CLAM, MULINIA LATERALIS, FROM A NATURAL POPULATION

Genetics ◽  
1984 ◽  
Vol 108 (2) ◽  
pp. 445-455
Author(s):  
David W Garton ◽  
Richard K Koehn ◽  
Timothy M Scott
Keyword(s):  
Growth Rate ◽  
Negative Relationship ◽  
Physiological Mechanism ◽  
Ammonia Excretion ◽  
Energy Budgets ◽  
Starch Gel Electrophoresis ◽  
Feeding Rates ◽  
Multiple Locus ◽  
Metabolic Costs ◽  
The Relationship

ABSTRACT The relationship between individual energy budgets and multiple-locus heterozygosity at six polymorphic enzyme loci was examined in Mulinia lateralis. Energy budgets were determined by measuring growth rates, rates of oxygen consumption, ammonia excretion and clearance rates. Enzyme genotypes were determined using starch gel electrophoresis. Growth rate and net growth efficiency (the ratio of energy available for growth to total energy absorbed) increased with individual heterozygosity. The positive relationship between observed growth and multiple-locus heterozygosity was associated with a negative relationship between routine metabolic costs and increasing heterozygosity. Reduction in routine metabolic costs explained 60% of the observed increased growth of more heterozygous individuals. When routine metabolic costs were standardized for differences in feeding rates, these standard metabolic costs explained 97% of the differences in growth rate. Lower standard metabolic costs, associated with increasing heterozygosity, have been proposed as a physiological mechanism for the relationship between multiple-locus heterozygosity and growth rate that has been reported for a variety of organisms, ranging in diversity from aspens to humans. This study demonstrates that reduction of standard metabolic costs, at least in clams, accounts for virtually all of the differences in growth rate among individuals of differing heterozygosity.

Spatial Variation in Food-Limited Growth of Juvenile Greenback Flounder, Rhombosolea tapirina: Evidence from Otolith Daily Increments and Otolith Scaling

1993 ◽  
Vol 50 (12) ◽  
pp. 2558-2567 ◽  
Author(s):  
Gregory P. Jenkins ◽  
Megan Shaw ◽  
Bryce D. Stewart
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
Somatic Growth ◽  
Feeding Rates ◽  
Otolith Growth ◽  
Somatic Growth Rate ◽  
Daily Increment ◽  
Daily Increments ◽  
Highly Correlated ◽  
The Relationship

Growth rates of juvenile flounder, Rhombosolea tapirina, determined from daily increment number, and the relationship between otolith and fish sizes (otolith scaling), were compared between two adjacent areas. Swan Bay, Victoria, a sheltered bay with a well-developed seagrass-detrital system, supports higher populations of prey and feeding rates of juvenile flounder than Port Phillip Bay, an area more exposed to waves and tidal currents. Temperature was significantly higher in Swan Bay (though generally less than 1 °C). Growth rates determined from daily increment number were similar within bays, but significantly different between bays. The pooled growth rate for Swan Bay (0.29 mm∙d−1) was significantly higher than for Port Phillip Bay (0.17 mm∙d−1). The same pattern was found for otolith scaling. Most of the variation in growth rates between the two bays was apparently related to food supply. A laboratory experiment indicated that otolith growth rate had a minimum level which was independent of somatic growth rate, and an additional component which was highly correlated with somatic growth rate. This resulted in an exponential decrease in otolith growth per unit somatic growth with increasing somatic growth rate such that variation in otolith scaling would be greatest at low growth rates.

scholarly journals The Relationship Between the Biokinetic Parameters of an Aerobic Granular Sludge System and the Applied Operating Conditions

2021 ◽  
Vol 31 (1) ◽  
pp. 161-171
Author(s):  
Nur Ain Hamiruddin ◽  
Nik Azimatolakma Awang
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Biomass Production ◽  
Specific Growth ◽  
Granular Sludge ◽  
Maximum Specific Growth Rate ◽  
Operating Conditions ◽  
Aerobic Granular Sludge ◽  
Biokinetic Parameters ◽  
The Relationship

Abstract Biokinetic parameters help to describe the rate of substrate utilization and biomass production or growth by microbial action, which is important to the design process and performance optimization of wastewater treatment. Although studies of the biokinetic parameters of aerobic granular sludge (AGS) systems have been increasing lately, the significance for each value in terms of maximum specific growth rate (μmax), substrate concentration at one-half of the maximum specific growth rate (KS), and cell yield (Y) in relation to the applied operating conditions are rarely discussed. Therefore, this study investigates the relationship and significance between the above-stated biokinetic parameters with organic loading rate (OLR) and reactor height/diameter (H/D) ratio from five different batches of AGS treated sewage, using the independent t-test. The biokinetic parameters are summarized as biomass production (Y and μmax ) and relied upon the relative increase in the OLR and reactor H/D ratios. Additionally, aerobic granules developed in reactors with a high H/D ratio have a shorter setup time and are more active in contrast with low H/D ratio reactors.

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