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Corpus Systématique Animale

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Life histories of three species of lanternfishes (Pisces: Myctophidae) from the eastern Gulf of Mexico

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  • J. V. Gartner Jr.
  • Department of Marine Science, University of South Florida, 140 Seventh Ave. S.E., 33701, St. Petersburg, Florida, USA

Morphology and microstructure of the sagittal otoliths from three species of mesopelagic, tropical-subtropical myctophids [Benthosema suborbitale (Gilbert),Diaphus dumerilii (Bleeker)Lepidophanes guentheri (Goode and Bean)], collected from September 1984 to May 1986 in the eastern Gulf of Mexico (27°N, 86°W), were examined and described. Analysis of the microstructure revealed microincrements corresponding to the daily growth rings reported in many studies. Using marginal increment analysis, the deposition of microincrements was verified as occurring daily, the first validation of daily growth rings in the otoliths of mesopelagic fishes. In all three species, the clear central (larval growth) zone of the sagitta was sharply delimited by a dark check accompanied by a series of accessory primordia. A wide, dark, sharply defined postlarval zone (width 100 µm) radiated out from this boundary inB. suborbitale andL. guentheri. While a darkened region was also observed around the larval growth zone inD. dumerilii, it was diffuse and differed in structure from that in the other two species. Within the dark zone in the otoliths ofB. suborbitale andL. guentheri, two different microincremental structures were observed. The narrower of these was determined to be the increment deposited on a daily basis. The structure and formation of the dark region in these three species appear to be related to larval transformation and behaviors of different species of myctophid larvae.

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  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
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  • 1 - science ; 2 - marine & freshwater biology
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Marine Biology

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