Devonian

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Synonyms for Devonian

from 405 million to 345 million years ago

References in periodicals archive ?
Our study has shown that analysis of edge provides an adequate validation for two structures used to determine age of fish, otoliths and opercles, in the river redhorse, and that these structures are superior to scales in analysis of age.
The ability to determine age of fish without bias is critical to effective management and research.
By dating the age of fish sauce found in ancient vessels near the site, scientists think they have confirmed that the explosion occurred on August 24, 79 A.
The small differences may be due to the sample collection time, area of sampling, vessels, and fullness of stomach, gonads maturity, and health differences and also some other factors related to fish ecology such as sex, age of fish, season, habitat, temperature, availability of food, and conditions for spawning (Ricker, 1973; Baganel and Tesch, 1978).
Similar findings were reported for the crystal darter (Crystallana asprella) when comparing populations from Arkansas and Wisconsin, where the maximum size and age of fish were lower in Arkansas specimens (George et al.
It is well recognized that haematological parameters in fish vary with factors such as species, age of fish and season (6).
Despite that the 'real' age of fish remains unknown and we do not know whether the weight of otoliths or lengths of fish are normally distributed within a cohort.
where Yw / R was yield per recruitment, tc was the mean age of fish at first capture, which was observed from catch-at age (i.
In this case, the age of fish resident at a reef should be positively correlated with the age of the reef.
The parameters for the von Bertalanffy growth equation and their 95% CLs were estimated from the lengths at age of fish at the date of capture by employing the nonlinear regression routine in SPSS (IBM Corp.
Correctly determining the age of fish, particularly elasmobranchs, is crucial if (unbiased) time-based life history rates such as growth, maturity, and mortality are to be estimated.
Age of fish Region of tag recovery and region of tagging EPS WPS NPR SNC Out-of-state Total Age 1 EPS 429 4 7 73 6 519 WPS 236 5 11 5 1 258 NPR 234 1 2119 66 1 2421 SNC 8 1 12 303 0 324 Age 2 EPS 524 12 10 9 17 572 WPS 80 3 2 1 1 87 NPR 158 4 813 64 1 1040 SNC 6 3 1 243 1 254 Age 3 EPS 78 0 2 2 0 82 WPS 3 0 0 0 0 3 NPR 1 0 27 2 0 30 SNC 0 0 0 34 0 34 Age 4+ EPS 225 11 94 4 7 341 WPS 1 0 1 0 0 2 NPR 29 3 127 1 0 160 SNC 1 0 1 43 1 46 Total 2013 47 3227 850 36 6173 Table 3 Summary of movement information for four age groups of red drum (Sciaenops ocellatus) in estuarine and coastal waters of North Carolina based on their age at tagging, 1983-2007.
The observed lengths at age of fish were assumed to be normally distributed about the predicted lengths at age for each sex, and to have a common standard deviation.