The gonad condition of the sea urchin Strongylocentrotus intermediuscollected in August 1997 at two stations in Peter the Great Bay was examined. One of the stations was located in a polluted area (Alekseev Bight, Popov Island) and the other, in a relatively clean area (the Verkhovskii Islands). The results were compared with analogous data for 1984, 1985, and 1989. In 1997, the gonad condition of sea urchins inhabiting the two areas differed significantly. The mean value of the gonad index (GI) for sea urchins from Alekseev Bight was less than half and the maturity index was about twice that of sea urchins from the Verkhovskii Islands. The GI of sea urchins from Alekseev Bight decreased by a factor of 1.5 between 1984 and 1997. Pronounced histopathological changes were found in sea urchin gonads at this station: granular and hydropic dystrophy of oocytes, resorption and a sharp decrease in the number of gametes (in about 20% of the sea urchins, hardly any gametes were found in the gonads), changes in the morphology of accessory cells (hypertrophy, atrophy, and necrosis), and accumulation of lipofuscin in the cytoplasm of accessory cells and oocytes, in the hemal sinuses and mesentery. The suppressed gonad condition of the sea urchin S. intermediusin Alekseev Bight may be a consequence of the unfavorable environmental situation that formed in the bight in the 1980s–1990s. The main negative factor is anthropogenic pollution of Amurskii Bay.
Russian Journal of Marine Biology – Springer Journals
Published: Oct 16, 2004
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera