By Takashi Kitagawa, Shingo Kimura
This ebook makes a speciality of most modern info at the biology and ecology of the 3 bluefin tuna species: the Pacific (Thunnus orientalis), Atlantic (T. thynnus), and southern bluefin tuna (T. maccoyii). within the ebook, the phylogeny and easy ecological info resembling formative years heritage, age and progress, and nutrition conduct are coated. details regarding migratory ecology, and critical organic features reminiscent of metabolism and energetics, swimming functionality, education, visible body structure, and reproductive body structure also are integrated.
Furthermore, new study insights approximately different types of mathematical types for bluefin tuna ecology are brought. all of the chapters are contributed via lively scientists engaged in bluefin tuna study. The reason of this publication is to give a contribution to a greater knowing of the biology and ecology of bluefin tuna, and inspire undergraduate and graduate scholars who learn this e-book to develop into bluefin tuna scientists who can give a contribution to extra knowing of the biology and ecology of bluefin tuna.
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Additional resources for Biology and ecology of bluefin tuna
Hampton 1997), it is often difficult to estimate growth rate for the full life span of long-lived species such as bluefin tunas from tagreturn data. Growth estimates can also be influenced by trauma and/or injury during tag-attachment. Tag-recapture experiments have also been used to validate otolith increment deposition rates in bluefin tunas (Foreman 1996; Clear et al. 2000). 1. Comparison among three growth curves of Pacific bluefin tuna from different habitats. Age, Growth and Reproductive Biology of Bluefin Tunas 49 Modal progression analysis is often applied to commercially harvested fishes and shellfishes, especially species that do not have hard structures for direct age estimation.
2001). Particularly, Pacific bluefin tuna larvae show very high growth rates after 20 DAH, which corresponds to the onset of piscivory (Tanaka et al. 2007b; Tanaka et al. 2014). Morphological developments of the hatchery-reared larvae are as follows (Fig. 7). 7. Morphological development of hatchery reared Pacific bluefin tuna (modified from Kaji et al. 1996). 0 mm SL on 10 DAH, from the flexion to postflexion phase at 7 mm SL on 14 DAH and from postflexion phase to juvenile at 16 mm SL on 23 DAH (Kaji et al.
0 mm SL on 10 DAH, from the flexion to postflexion phase at 7 mm SL on 14 DAH and from postflexion phase to juvenile at 16 mm SL on 23 DAH (Kaji et al. 1996; Tanaka et al. 2007b). Precocious development of digestive system of Paciϐic blueϐin tuna larvae Generally, newly hatched larvae of most mass-spawning marine fish species are underdeveloped in terms with their digestive systems. The mouth and anus of the newly hatched larvae do not open and their digestive tract is a simple tube. Two transition periods in the process of development of the larval digestive system are observed.