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Black crappies mature at 2–4 years. Growth during the first four years of their life is faster in the warm waters of the southern part of its range than in cooler waters in the north. [6] White crappie have a higher growth rate in terms of length than black crappie. [7] Most fish that are caught for sport are between 2 and 5 years old.
Hybrid crappie (Pomoxis annularis × nigromaculatus) have been cultured and occur naturally. [22] The crossing of a black crappie female and white crappie male has better survival and growth rates among offspring than the reciprocal cross does. [22] Hybrid crappie are difficult to distinguish from black crappie by appearance alone.
The dorsal fins of the white crappie start farther back on the body than those of the black crappie. The anal fin is about the same size as the dorsal fin. [7] The white crappie has six dorsal fin spines, whereas the black crappie has seven or eight dorsal fin spines. [7] White crappies are also slightly more elongated than black crappies. [8]
Agronomic studies often focus on the above-ground part of plant biomass, and consider crop growth rates rather than individual plant growth rates. Nonetheless there is a strong corollary between the two approaches. More specifically, the ULR as discussed above shows up in crop growth analysis as well, as: = . = .
For example, with an annual growth rate of 4.8% the doubling time is 14.78 years, and a doubling time of 10 years corresponds to a growth rate between 7% and 7.5% (actually about 7.18%). When applied to the constant growth in consumption of a resource, the total amount consumed in one doubling period equals the total amount consumed in all ...
Guppy fry. Livebearers are fish that retain their eggs inside the body and give birth to live, free-swimming young. They are especially prized by aquarium owners. Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include: guppies, mollies, platies and swordtails.
Figure 1: A bi-phasic bacterial growth curve.. A growth curve is an empirical model of the evolution of a quantity over time. Growth curves are widely used in biology for quantities such as population size or biomass (in population ecology and demography, for population growth analysis), individual body height or biomass (in physiology, for growth analysis of individuals).
Sample growth chart for use with American boys from birth to age 36 months. A growth chart is used by pediatricians and other health care providers to follow a child's growth over time. Growth charts have been constructed by observing the growth of large numbers of healthy children over time.