GROWTH AND FORM IN NEMATODES: IV. TAIL LENGTH AND VULVA POSITION BY E. GERAERT Instituut voor Dierkunde, Ledeganckstraat 35, Gent, Belgium During post-embryonic growth tail length can increase, remain constant or even decrease. Usually, such changes cannot be explained as populations of the same species may behave differently. The differences in length between males and females is based, I suggest, on the mechanics of mating and on requirements for defaecation. The constant position of the vulva is probably not essential functionally but may arise from the cell-constancy of the nematodes and equal elongation of epidermal cells in front of and behind the vulva. The position of the vulva is usually expressed as a percentage of the entire body length but, in several long tailed tylenchs, it is better to calculate it as a percentage of the distance between the top of the head and the anus. Vulva and anus, pores usually situated on the mid-ventral line, are used to determine where the ratios c and V are calculated. These ratios are of unequal importance, c being rather unreliable and V very useful (Thorne & Allen, 1959; Tarjan, 1967 & Geraert, 1968). Two questions can be asked: why is
Nematologica – Brill
Published: Jan 1, 1979
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