Pelagic Stromateoid Fishes (Pisces, Perciformes) of the Eastern Pacific: Kinds, Distributions, and Early Life Histories and Observations on Five of these from the Northwest Atlantic
Abstract:This contribution has a dual purpose: first, to establish the kinds of pelagic stromateoid fishes present in the eastern Pacific, including their distribution and relative abundances and second, to describe their early life histories. Complete life history series are available for 11 species: Amarsipus carlsbergi (Amarsipidae); Icichthys lockingtoni (Centrolophidae); Tetragonurus atlanticus and T. cuvieri (Tetragonuridae); and Cubiceps caeruleus, C. pauciradiatus, Psenes arafurensis, P. cyanophrys, P. maculatus, P. pellucidus, and P. sio (Nomeidae). Fragmentary series, sometimes restricted to a few specimens, are available for eight species: Schedophilus huttoni, S. labyrinthicus, S. maculatus (Centrolophidae); Tetragonurus pacificus (Tetragonuridae); and Cubiceps capensis, Cubiceps sp. A, Cubiceps sp. B, and Nomeus granovii (Nomeidae). Fishes in the families Amarsipidae and Nomeidae and two species of the Tetragonuridae are primarily distributed in tropical-subtropical waters; those in the family Centrolophidae and T. cuvieri are largely temperate water forms.
In treating life history series, the dynamic approach of tracing developmental characters is used. For each species the following items are discussed: literature, material, distribution, distinguishing characters of juveniles and of larvae, meristics, morphometrics, ossification, and pigmentation. The importance of skeletal characters such as the number of vertebrae, possession of both a haemal spine and ribs on one to several vertebrae, the number and positioning of predorsal bones in relation to neural spines and of pterygiophores in relation to neural and haemal spines is discussed for all species. The pelagically developing eggs are known for six species, Icichthys lockingtoni, Tetragonurus cuvieri, T. atlanticus, Cubiceps pauciradiatus, C. caeruleus, and Psenes sio, and are tentatively identified for two others, Psenes pellucidus and P. arafurensis. Cubiceps carinatus Nichols and Murphy from the eastern Pacific is considered a synonym of C. pauciradiatus Günther which has a worldwide tropical-subtropical distribution.
Document Type: Research Article
Publication date: July 1, 1976
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