Affiliation:
1. Department of Ecology and Evolutionary Biology and Biodiversity Institute, University of Kansas, Lawrence, Kansas, United States
2. Division of Ichthyology, American Museum of Natural History, New York, New York, United States
Abstract
Finding a mate is of the utmost importance for organisms, and the traits associated with successfully finding one can be under strong selective pressures. In habitats where biomass and population density is often low, like the enormous open spaces of the deep sea, animals have evolved many adaptations for finding mates. One convergent adaptation seen in many deep-sea fishes is sexual dimorphism in olfactory organs, where, relative to body size, males have evolved greatly enlarged olfactory organs compared to females. Females are known to give off chemical cues such as pheromones, and these chemical stimuli can traverse long distances in the stable, stratified water of the deep sea and be picked up by the olfactory organs of males. This adaptation is believed to help males in multiple lineages of fishes find mates in deep-sea habitats. In this study, we describe the first morphological evidence of sexual dimorphism in the olfactory organs of lanternfishes (Myctophidae) in the genus Loweina. Lanternfishes are one of the most abundant vertebrates in the deep sea and are hypothesized to use visual signals from bioluminescence for mate recognition or mate detection. Bioluminescent cues that are readily visible at distances as far as 10 m in the aphotic deep sea are likely important for high population density lanternfish species that have high mate encounter rates. In contrast, myctophids found in lower density environments where species encounter rates are lower, like those in Loweina, likely benefit from longer-range chemical or olfactory cues for finding and identifying mates.
Funder
University of Kansas Ecology and Evolutionary Biology Summer Research Award
University of Kansas Biodiversity Institute Panorama Grant
American Museum of Natural History Lerner-Gray Marine Research Grant
Reference89 articles.
1. Larval reef fish could use odour for detection, retention and orientation to reefs;Atema;Marine Ecology Progress Series,2002
2. Midwater fishes in the eastern North Atlantic—I. Vertical distribution and associated biology in 30 N, 23 W, with developmental notes on certain myctophids;Badcock;Progress in Oceanography,1976
3. Olfactory organs in the deep sea hatchetfish Sternoptyx diaphana (Stomiiformes, Sternoptychidae);Baird;Bulletin of Marine Science,1993
4. Encounter models and deep-sea fishes: numerical simulations and the mate location problem in Sternoptyx diaphana (Pisces, Sternoptychidae);Baird;Deep Sea Research Part I: Oceanographic Research Papers,1995
5. Sexual dimorphism and demography in two species of oceanic midwater fishes (Stomiiformes: Sternoptychidae) from the eastern Gulf of Mexico;Baird;Bulletin of Marine Science,1990
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