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By John Ashton, The Perfect Library

"Curious Creatures in Zoology" from John Ashton. English author (1834–1911).

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Extra info for Curious Creatures in Zoology

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The most common developmental milestones used in developmental classifications are hatching, yolk absorption, and fin development. There is no doubt that hatching is a major transition. It frees the larva to make effective behavioral responses to environmental stimuli. Yolk absorption, or more accurately the transition from endogenous to exogenous nutrition, is also a critical developmental and ecological transition 20 Fishery Science for a fish larva. 2). Terminologies born out of classical embryology use yolk absorption as the criterion to separate the embryonic and larval periods, so that the term “embryo” applies long after hatching.

A. Trippel), pp. 225–249. Chapman and Hall, London. A. E. (1994) Development of predator defences in fishes. Reviews in Fish Biology and Fisheries 4, 145–183. R. M. (1998) Quantifying developmental progress for comparative studies of larval fishes. Copeia 1998, 602–611. S. J. (Eds) (1988) Fish Physiology, Volume 11. The Physiology of Developing Fish. Part A. Eggs and Larvae. Academic Press, San Diego. S. J. (Eds) (1988) Fish Physiology. Volume 11. The Physiology of Developing Fish. Part B. Viviparity and Posthatching Juveniles.

Fishes have three pairs of otoliths, the sagittae, lapilli, and asterisci. 13). Soon after the onset of crystallization, marks form as a result of the differential deposition of calcium carbonate (typically in the form of aragonite) and a high molecular weight protein called otolin. Differential deposition of the calcium carbonate occurs in an endogenously driven diurnal pattern. The initiation of daily marks may begin prior to hatching, at hatching, or at yolk absorption depending on the species.

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