Growth in eight species of tropical anchovy determined from primary otolith increments

2002 ◽  
Vol 53 (5) ◽  
pp. 859 ◽  
Author(s):  
Frank E. Hoedt
Keyword(s):  
Experimental Validation ◽  
Growth Increment ◽  
Growth Constant ◽  
Growth Increments ◽  
Short Lifespan ◽  
Primary Growth ◽  
Otolith Increments ◽  
Sagittal Otolith ◽  
Growth Equations ◽  
The Relationship

Growth in eight species of tropical anchovy from Townsville, North Queensland was analysed from counts of primary growth increments in the sagittal otolith. Experimental validation of growth increment periodicity in four species indicated that primary growth increments are deposited daily. Reparameterized von Bertalanffy growth equations were used to describe the relationship between length and age over the range of lengths aged in all species. Growth rate during the immature phase ranged from 0.4 to 0.7 mm d–1 with an average of 0.58 mm d–1. Longevity was estimated for four stolephorid anchovies and ranged from three to ten months. The short lifespan and high values of the growth constant, K, calculated for the smaller species of anchovy were consistent with other recent otolith-based studies on small tropical clupeoids. This paper reports the first study of large number of co-occurring closely related tropical anchovy species and evidence that growth increments are formed with a daily periodicity.

scholarly journals BASELINE ERROR ANALYSIS AND EXPERIMENTAL VALIDATION FOR HEIGHT MEASUREMENT OF FORMATION INSAR SATELLITE

2018 ◽  
Vol XLII-3 ◽  
pp. 371-376
Author(s):  
X. Gao ◽  
T. Li ◽  
X. Zhang ◽  
X. Geng
Keyword(s):  
Stochastic Model ◽  
Error Propagation ◽  
Experimental Validation ◽  
Simulation Analysis ◽  
Srtm Dem ◽  
Height Measurement ◽  
Spatial Distribution Characteristics ◽  
Propagation Rule ◽  
The Relationship ◽  
Baseline Error

In this paper, we proposed the stochastic model of InSAR height measurement by considering the interferometric geometry of InSAR height measurement. The model directly described the relationship between baseline error and height measurement error. Then the simulation analysis in combination with TanDEM-X parameters was implemented to quantitatively evaluate the influence of baseline error to height measurement. Furthermore, the whole emulation validation of InSAR stochastic model was performed on the basis of SRTM DEM and TanDEM-X parameters. The spatial distribution characteristics and error propagation rule of InSAR height measurement were fully evaluated.

scholarly journals Relationships of Otolith Dimension with Body Length of European Eel Anguilla anguilla (Linnaeus, 1758) from Adriatic catchment of Montenegro

2018 ◽  
Vol 59 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Tamara Kanjuh ◽  
Danilo Mrdak
Keyword(s):  
Linear Function ◽  
Body Length ◽  
Somatic Growth ◽  
Anguilla Anguilla ◽  
Body Growth ◽  
The Body ◽  
European Eel ◽  
Fish Size ◽  
Sagittal Otolith ◽  
The Relationship

This study examined the relationship between the sagittal otolith morphometric variables (length, height and weight) and body growth of the European eel. Eels that were studied ranged in total length from 11.2 to 79.5 cm. The relationships between the sagittal otolith variables and fish somatic growth were described with a non-linear function. The resulting coefficients of determination \((r^2)\) ranged from 0.782 to 0.914. The variable most strongly related to fish size was found to be the sagittal otolith length (OL) with 91.4 % of the variability. The results of this study provide the first comprehensive data regarding the relationship between the sagittal otolith morphometric variables with the body length of Anguilla anguilla.

Growth Kinetics of Interfacial Intermetallic Compound in Al(AA4343)/Steel(SUS316) Clad Strip

2020 ◽  
Vol 993 ◽  
pp. 447-456
Author(s):  
Xiao Jun Zhang ◽  
Kun Yuan Gao ◽  
Xiu Hua Hu ◽  
Yu Sheng Ding ◽  
Guo Zhan Wang ◽  
...  
Keyword(s):  
Growth Kinetics ◽  
Annealing Temperature ◽  
Optical Microscope ◽  
Alloy Layer ◽  
Kinetics Analysis ◽  
Growth Constant ◽  
Transmission Electron ◽  
Dispersive System ◽  
The Relationship ◽  
Kinetics Of

The composition and microstructure of intermetallic compounds (IMC) at the interface of aluminum(AA4343)-stainless steel(SUS316) were studied upon annealing at 550°C for 1h to 20h and at 610°C for 15min to 10h by means of optical microscope(OM) , scanning electron microscope (SEM) with energy dispersive system(EDS) and transmission Electron Microscopy (TEM). The results showed that the IMC was of 4.3μm to 36.1μm thick during heat treatment at 550°C for 1h to 20h, and the IMC contained Al-Fe-Si-Cr-Ni-Mo and Al-Fe-Si -Ni. During annealing at 610°C for 15min to 5h, the thickness of IMC was 31.2 μm to 208 μm, and the IMC were mainly of η-Fe2Al5 and τ10- Al4Fe1.7Si at 550°C for 10h. As the annealing time extended to 10h, natural delamination occurred at the interface between the aluminum alloy layer and IMC layer. The growth kinetics analysis showed that the relationship between the thickness of IMC “X” and time “t” followed the relational equation X=(kt)n. For AA4343(solid) - SUS316(solid), n was 1/2, and the growth constant k = 1.9×10-13m2/s at annealing temperature of 550 °C. When the temperature was 610°C, AA4343 - SUS316 was a liquid-solid contact reaction, n was 1, the growth constant k=1.45×10-8m/s.

Further Analysis of Ration and Growth Relationship of Plaice (Pleuronectes platessa)

1969 ◽  
Vol 26 (12) ◽  
pp. 3237-3241 ◽  
Author(s):  
Samir Zaky Rafail
Keyword(s):  
Maximum Growth ◽  
Growth Efficiency ◽  
Growth Increment ◽  
Mean Value ◽  
Pleuronectes Platessa ◽  
Growth Increments ◽  
Power Equation ◽  
The Mean ◽  
Relationship Of ◽  
Weight Groups

Evidence is given that the average daily rations (R) and fortnightly growth increments (ΔW) of six weight groups of Pleuronectes platessa fed on Mytilus edulis are related as in the power equation ±(ΔW−ΔWm) = ±b(|R–Rm|)B. Rm is the daily ration associated with the growth increment (ΔWm) at maximum growth efficiency; b and B are parameters. The power B has a mean value of about 0.5 and shows significant deviations from the mean especially in the case of smaller fish.

scholarly journals Large mothers, but not large fathers, influence offspring number in a caridean shrimp

2018 ◽  
Vol 96 (10) ◽  
pp. 1106-1113 ◽  
Author(s):  
D.E. Sganga ◽  
C. Tropea ◽  
M. Valdora ◽  
M.F. Statti ◽  
L.S. López Greco
Keyword(s):  
Reproductive Output ◽  
Growth Period ◽  
Female Offspring ◽  
Growth Increment ◽  
Adult Males ◽  
Lipid Concentration ◽  
Offspring Quality ◽  
Offspring Number ◽  
Males And Females ◽  
The Relationship

The relationship between parental mass and female reproductive output, as well as offspring quality, was studied in the red cherry shrimp (Neocaridina davidi (Bouvier, 1904)) under controlled laboratory conditions. Adult males and females of the same age were paired combining different shrimp masses. The number of hatched juveniles from large females was higher than that from small ones, but no influence of paternal mass was detected on this variable. Both the mass of newly hatched juveniles and their growth increment during a 60-day period were similar for all parental masses. Shrimps reached sexual maturity at the end of the growth period in all treatments, and their biochemical reserves (glycogen, lipid, and protein concentrations) were not associated with maternal and paternal masses. However, lipid concentration was higher in female offspring than in male offspring. The present results show that, unlike maternal mass, paternal mass had no effect on female reproductive output and offspring quality, suggesting that the contribution of males to offspring development was adequate regardless of male size.

Growth Increments and Geochemical Variations in the Molluscan Shell

1985 ◽  
Vol 13 ◽  
pp. 72-87 ◽  
Author(s):  
Douglas S. Jones
Keyword(s):  
Shell Growth ◽  
Maximum Growth ◽  
Growth Increment ◽  
Growth Patterns ◽  
Random Disturbance ◽  
Growth Increments ◽  
Molluscan Shell ◽  
External Shell ◽  
Periodic Growth ◽  
Geochemical Variations

Perhaps the one structural feature of the molluscan shell which has historically attracted the most attention from biologists and paleobiologists alike is the banding or growth increment variation associated with so many molluscan species. Such growth patterns are often prominently displayed on the external surfaces of shells and have long been the focus of serious biological and paleontological research (see reviews by Clark, 1974; Lutz and Rhoads, 1980). The usefulness of external shell growth patterns in ecological or paleoecological contexts is limited, however, by both the inability to distinguish true periodic features from random disturbance marks and by the extreme crowding of growth lines near the margins of mature shells. In the last two decades these problems have been surmounted with the recognition of periodic growth patterns within molluscan shells. Internal shell growth patterns are known from all classes of mollusks, but those in the Bivalvia have been studied most extensively. This is a result of the relative ease with which a complete ontogenetic growth record can be obtained by sectioning a shell along the axis of maximum growth (Rhoads and Pannella, 1970). Analogous ontogenetic records are very difficult, if not impossible, to obtain from coiled or spiral shells (e.g., gastropods) using current techniques (Lutz and Rhoads, 1980). This chapter, then, aims to review the major types of internal shell growth patterns described within molluscan shells (mainly bivalves) and to discuss their origin and applications in ecology and paleoecology. Also taken up in this chapter is a brief consideration of geochemical variations (stable oxygen and carbon isotopes and trace and minor elements) within molluscan shells. Physical-chemical, environmental, and physiological influences on shell chemistry are discussed in relation to how biogeochemical variations in the shell may be used to reconstruct paleoenvironmental conditions.

Growth rhythms in the brachiopod Rafinesquina alternata from the Late Ordovician of southeastern Indiana

Paleobiology ◽  
1982 ◽  
Vol 8 (4) ◽  
pp. 389-401 ◽  
Author(s):  
Gary D. Rosenberg
Keyword(s):  
Nutrient Supply ◽  
Growth Increment ◽  
Late Ordovician ◽  
The Moon ◽  
Future Studies ◽  
Growth Increments ◽  
True Number ◽  
Environmental Setting ◽  
Lower Amplitude ◽  
Shallow Subtidal

Growth rhythms are described in the accretionary skeletons of Rafinesquina alternata, a Late Ordovician brachiopod from southeastern Indiana. Contiguous growth increments widen and narrow in repeating series, giving the appearance of adjacent clusters of increments. Fourier analyses of growth increment widths and counts of the number of increments within individual clusters yield similar periodicities. Increments vary in width over a period of approximately 19 increments, modulated with a lower amplitude oscillation of 27 increments. The number of increments per cluster falls into two groups; clusters having between 8 and 17 increments outnumber those having between 18 and 30 increments.All specimens were obtained from a Maysvillian facies of the Dillsboro Formation, previously inferred to represent a shallow subtidal environmental setting. The growth periodicities described here are consistent with this interpretation. The intensity of tidal parameters such as emersion-immersion cycles, substrate shifts, changes in nutrient supply or in oxygen tension declines with depth as would the number of growth increments added each month in response to these factors. Thus, for these specimens, the maximum number of increments per cluster probably approximates the true number of “tidal” days in the Late Ordovician synodic month (period between full moons).The paleoecological model derived from these analyses can be used in future studies to predict the rate of the earth's rotation and the motion of the moon in the Late Ordovician and, equally importantly, to evaluate the limits of uncertainty of such studies.

Comparaison de la croissance d'espèces ligneuses en milieu ouvert et sous couvert forestier

1983 ◽  
Vol 13 (3) ◽  
pp. 508-513 ◽  
Author(s):  
P. Bellefleur ◽  
G. LaRocque
Keyword(s):  
Sugar Maple ◽  
Growth Increment ◽  
The Other ◽  
Yellow Birch ◽  
Full Sunlight ◽  
Growth Increments

The objective of this paper is to compare growth increment between full sunlight conditions and moderately shaded conditions for seedlings of three species: sugar maple (Acersaccharum Marsh.), yellow birch (Betulaalleghaniensis Britton), and beech (Fagusgrandifolia Ehrh.). Diameter and height increments were larger in full sunlight than under cover. Yellow birch has shown better growth increments than sugar maple and beech under both conditions. This suggests that shaded conditions are not as limiting for the establishment of yellow birch than for the other two species.

Age estimation for young bowhead whales (Balaena mysticetus) using annual baleen growth increments

2008 ◽  
Vol 86 (6) ◽  
pp. 525-538 ◽  
Author(s):  
S. C. Lubetkin ◽  
J. E. Zeh ◽  
C. Rosa ◽  
J. C. George
Keyword(s):  
Growth Parameters ◽  
Age Determination ◽  
Population Level ◽  
Exponential Model ◽  
Growth Increment ◽  
Balaena Mysticetus ◽  
Nonlinear Mixed Effects Model ◽  
Bowhead Whales ◽  
Growth Increments ◽  
Age Estimates

We compiled age estimates and baleen plate δ13C data from 86 bowhead whales ( Balaena mysticetus L., 1758). We used previous whale age estimates based on aspartic acid racemization (AAR) and corpora counts to extend the use of δ13C data for age determination from cycle counting to a modified exponential model using annual baleen growth increments. Our approach used the growth increment data from individual whales in a nonlinear mixed effects model to assess both population-level and whale-specific growth parameters. Although age estimates from baleen-based models become less precise as the whales age, and baleen growth and length near steady state, the growth increment model shows promise in estimating ages of bowhead whales 10–13.5 m long with baleen lengths <250 cm, where other techniques are less precise or the data are scarce. Ages estimated using the growth increment data from such whales ranged from 6.4 to 19.8 years.

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