Extracting the urine from temporarily blinded lobsters
Tuesday 07 May 1996
The paper, according to the abstract on Ovid's PsycLit database, "characterized components of sex recognition by American lobsters through detailed study of videotaped recordings of both intra- and intersexual interactions in temporarily blinded lobsters ... Results suggest that sex recognition occurring over short distances may not rely on visual information." Furthermore, they developed "a method of antennal gland cannulation that allowed for continuous collection of voided urine from individual lobsters in paired interactions away from contact with the seawater." Since mating still occurred, the researchers concluded that "urine is not a source of factors required for lobster sex recognition."
Food, however, causes a lobster more problems, particularly if it is placed on the side of its larger claw. W F Angermeier of Cologne University examined the responses of 18 lobsters to food presented on different sides of their tank. The results, as reported in "Behavioral expression of the asymmetry in lobster claws" (Bulletin of the Psychonomic Society, July 1991), showed that it all depends whether the lobster is left-clawed or right-clawed: "When only one side was baited, all lobsters with the large crusher claw on the left side made more mistakes on the left, and all lobsters with the large crusher claw on the right side made more mistakes on the right. Results indicate that food-related information is perceived more accurately by lobsters when it comes from the contralateral side of the large crusher claw."
Two final results complete our survey of the state of knowledge of lobster behaviour. In "Spatial and temporal coordination during walking in Crustacea" (F Clarac, Trends in Neurosciences, August 1984) reports that a lobster's stride length is invariable whatever speed it walks at. And "An intersegmental reflex between the copulatory swimmerets of the male squat lobster," (WJ Heitler, CM Myers and DP Maitland, Marine Behavior and Physiology, November 1983) reports that the male squat lobster has an intersegmental reflex between its copulatory swimmerets.
Books And it is whizzpopping!
MusicThey're running their own restaurants
Arts & Ents blogs
- 1 Dentist who illegally killed Cecil the lion blames local guides for the scandal
- 2 Kate Winslet thanked 'particularly horrible' girl who bullied her at school after Titanic success
- 3 Norwich paedophile ring: Woman at centre of gang who made children 'sexual play things' guilty of 23 offences
- 4 Black and ethnic minority people twice as likely to be hit by Tory cuts than white people, report finds
- 5 Walter Palmer: American dentist revealed as the killer of Cecil the lion in Zimbabwe
New on Netflix August 2015: From Narcos and Spellbound to Kick Ass 2 and Dinotrux
Listen! Beowulf opening line misinterpreted for 200 years
Heath Ledger's father reveals dead actor's 'Joker diary' written during The Dark Knight
Game of Thrones season 6: New toy line suggests Jon Snow is not among the dead
Spectre: Ellie Goulding is almost definitely singing the theme song to the next Bond film
Labour leadership contender Jeremy Corbyn says 'we can learn a great deal from Karl Marx'
The last thing Labour needs is a leader like Jeremy Corbyn who people want to vote for
I am the Jeremy Corbyn supporter that many will tell you doesn't exist
Public anger after French sunbather beaten up by gang for wearing a bikini in Reims park
Labour leadership: New poll shows party is now even 'less electable' than under Ed Miliband
Yvette Cooper: Our choice is years of Tory rule under Jeremy Corbyn – or a return to a Labour government