Premium
A note on the distribution of ectopic thyroid tissue in five species of poeciliid fishes
Author(s) -
Woodhead A. D.,
Bryant Paulette C.
Publication year - 1982
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1982.tb02823.x
Subject(s) - poecilia , biology , thyroid , spleen , fish <actinopterygii> , zoology , physiology , anatomy , guppy , endocrinology , fishery , immunology
The intraperitoneal injection of polycyclic aromatic hydrocarbons in young Amazon mollies induces proliferation of ectopic thyroid tissue in the spleen. We have surveyed untreated mollies, Poecilia formosa , and four closely related poeciliid fishes to see if ectopic thyroid tissue occurs normally in the spleen. If this were the case, it is possible that the tissue may have been stimulated to proliferate by the injected compounds. We found no instances of ectopic thyroid at any site in 50 untreated Amazon mollies examined nor in some 50 spleens dissected from other untreated fish. Splenic thyroid tissue was found in five guppies from 50 surveyed, but did not occur in other species.