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By Takaomi Arai

Anguillid eels have interested biologists for hundreds of years because of their marvelous long-distance migrations among freshwater habitats and their spawning parts some distance out within the ocean. This booklet presents an extended past due replace at the biology and ecology of anguillid eels and contours accomplished assurance of the foremost positive aspects of the genus Anguilla. It covers a large spectrum of themes at the biology (taxonomy, phylogeny, evolution, replica, feeding, salinity variation) and ecology (life historical past, recruitment, migration) of anguillid eels. It additionally brings jointly very important info at the nation of eel fisheries, conservation, exploitation, and management.

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Biology and ecology of anguillid eels

Anguillid eels have involved biologists for hundreds of years as a result of their astounding long-distance migrations among freshwater habitats and their spawning components some distance out within the ocean. This ebook presents a protracted late replace at the biology and ecology of anguillid eels and contours complete insurance of the foremost beneficial properties of the genus Anguilla.

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Atlantic eels were separated from congeners by circumglobal Tethys Seaway about 18 Mya. Anguilla was a monophyletic group. A. borneensis was the earliest derived species. Species disperse from Indonesia and move to Atlantic through the Tethys Corridor. The ancestral species of Atlantic eels moved into the Atlantic Ocean at least before the closure of the Tethys Sea at around 30 Mya. Anguilla originated about 50–60 Mya. A. celebesensis was the possible ancestral species of the Anguillidae. In the Eocene epoch (57–36 Mya) the ancestral eel originated in the western Pacific in and around Indonesia.

Japonica. Ege (1939) subdivided Anguilla eels into four distinct groups based on morphological characters. Four temperate Anguilla eels (A. rostrata, A. anguilla, A. japonica, and A. dieffenbachii) and two tropical species (A. mossambica and A. malgumora) having similar long dorsal fins and uniform coloration are in the same group. In contrast, temperate A. australis and tropical A. bicolor and A. obscura, which have shorter dorsal fins and uniform coloration, were placed in the same group (Fig.

20: 450–459. Arai, R. 2011. Fish Karyotypes. A Check List. Springer Press, New York. , D. Limbong, T. Otake and K. Tsukamoto. 2001. Recruitment mechanisms of tropical eels, Anguilla spp. and implications for the evolution of oceanic migration in the genus Anguilla. Mar. Ecol. Prog. Ser. 216: 253–264. , B. Strehlow, K. Jürss and C. Sturmbauer. 2000. A new molecular phylogenetic hypothesis for the evolution of freshwater eels. Mol. Phylogenet. Evol. 14: 250–258. , M. Gayet and C. Atallah. 2003. Les premiers Anguilliformes.

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