Premium
Comparative morphology and cytology of the eye, with particular reference to the retina, in lizardfishes (Synodontidae, Teleostei)
Author(s) -
Fishelson Lev,
Delarea Yakob,
Goren Menachem
Publication year - 2012
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.2010.00483.x
Subject(s) - retina , teleostei , biology , anatomy , fundus (uterus) , fish <actinopterygii> , zoology , ophthalmology , fishery , medicine , neuroscience
Fishelson, L., Delarea, Y. and Goren, M. 2012. Comparative morphology and cytology of the eye, with particular reference to the retina, in lizardfishes (Synodontidae, Teleostei). — Acta Zoologica (Stockholm) 93 : 68–79. The retinas of nine species of lizardfishes (Synodontidae) are composed of double cones, single cones, and rods. The cones are 16–28 μm long, and their number in the fundus of adult Synodus variegatus reaches ca. 32,900 mm 2 (varying from ca. 300,000 to ca. 390,000 in a 10 mm 2 of the retina), while in Saurida spp., they number ca. 12,000–14,000/mm 2 . The cone ellipsoids are with up to 600 mitochondria, 0.5–1.6 μm in diameter. The rods are 30–50 μm long; their outer segments 0.6–1.2 μm thick and 15–18 μm long; their inner segments elongated. Their number varies from 15 to 128 million/retina. In fish of similar dimensions but of different species, the number of visual cells in the retina differs. In all species, the eyes increase from 2.0 mm in diameter in the smallest fish studied to 12 mm in the largest one. With eye growth, the retina in the various species increases from ca. 3.8 mm 2 in the smallest fish to ca.160.0 mm 2 in the large Saurida macrolepis . The possible ecological aspects of the observed phenomena are discussed.