Of the common adult lanternfishes found off Oregon, two
species have fat-invested swimbladders (Stenobrachius
leucopsarus Eigenmann and Eigenmann 1890 and Stenobrachius
nannochir Gilbert 1891), two species have reduced swimbladders
(Lampanyctus ritteri Gilbert 1915 and Lampanyctus galis
Gilbert 1891), two species have gas-filled swimbladders
((Protomyctophum thomp soni (Chapman 1944)) and (Protomyctophum
crockeri (Bolin 1939)). Adult Diaphus theta Eigenrnann
and Eigenmann 1891 and adult Tarletonbeania crenularis Jordan
and Gilbert 1880 however, have either gas-filled or reduced
swimbladders. Small individuals of all the above species have
gas-filled swimbladders.
The primary buoyancy mechanism is lipids for large
S. leucopsarus, S. nannochir, L. ritteri andD. theta, is
reduction of dense material for large L. regalis, and is gas
for all juveniles and for P. thompsoni, P. crockeri and some
adult T. crenularis and D. theta. / Graduation date: 1971
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/28990 |
| Date | 18 December 1970 |
| Creators | Butler, John Lawton |
| Contributors | Pearcy, William G. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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