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lecture_notes:04-23-2010 [2010/04/28 11:38]
karplus removed extraneous \\ returns
lecture_notes:04-23-2010 [2010/05/01 09:00] (current)
jlong Link to Slides of John and Jan
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 ====== Slides ====== ====== Slides ======
-Jeffrey Long has slides from Janet Leonard ​and he will be uploading them.\\+The slides from the presentation of John and Janet can be dowloaded here,​[[http://​compbio.soe.ucsc.edu/​slugGenome/​|http://​compbio.soe.ucsc.edu/​slugGenome/​]] ​.\\
  
  
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 Janet'​s interest is in sex selection. ​ Eberhard'​s hypothesis: [That we Janet'​s interest is in sex selection. ​ Eberhard'​s hypothesis: [That we
-can ] classif[y] based on genitalia (as done with insects, spiders,\\+can ] classif[y] based on genitalia (as done with insects, spiders,
 //etc.//) suggests the importance of sex selection. ​ Genitalia //etc.//) suggests the importance of sex selection. ​ Genitalia
-differences in nearby counties are not explicable by natural\\+differences in nearby counties are not explicable by natural
 selection, //e.g.// how would NS explain [improved fitness by a selection, //e.g.// how would NS explain [improved fitness by a
 different vaginal muscle in the same geographical area.] different vaginal muscle in the same geographical area.]
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 //Ariolimax stramineus//​ courtship: antiparallel alignment of slugs is //Ariolimax stramineus//​ courtship: antiparallel alignment of slugs is
-standard. ​ They line up right sides of their heads until the alignment\\+standard. ​ They line up right sides of their heads until the alignment
 allows copulation. ​ The first copulation takes place in about twenty allows copulation. ​ The first copulation takes place in about twenty
-minutes with subsequent occuring over about two hours. ​ No apophallation in the\\+minutes with subsequent occuring over about two hours. ​ No apophallation in the
 one shown on film. one shown on film.
  
 Mating film for //​brachyphallus//:​ This is one of the three under Mating film for //​brachyphallus//:​ This is one of the three under
-//Ariolimax Meadarian//​. ​ Note the initial biting and head swinging\\+//Ariolimax Meadarian//​. ​ Note the initial biting and head swinging
 which seem to cause no damage. ​ The biting helps line up the head which seem to cause no damage. ​ The biting helps line up the head
-regions. ​ Banana slugs cannot reverse so the cirlcing helps get them\\+regions. ​ Banana slugs cannot reverse so the cirlcing helps get them
 get into position for mating. get into position for mating.
  
 Mating film for //​californicus//:​ Unilateral copulation (after two hours Mating film for //​californicus//:​ Unilateral copulation (after two hours
-biting, head swinging). ​ It is hard to tell which plays the role of\\+biting, head swinging). ​ It is hard to tell which plays the role of
 male and female but Janet thinks they alternate over a copulation male and female but Janet thinks they alternate over a copulation
 session. session.
  
 Mating film for //​dolicophallus//:​ Example of apophallation (by the Mating film for //​dolicophallus//:​ Example of apophallation (by the
-first to withdraw). ​ How costly is this for a hermaphrodite? ​ It is\\+first to withdraw). ​ How costly is this for a hermaphrodite? ​ It is
 pretty rare: 5 out of 100 copulations end in apophallation. pretty rare: 5 out of 100 copulations end in apophallation.
  
 Why does apophallation occur and when?  They have observed it only nine Why does apophallation occur and when?  They have observed it only nine
-times and never by virgins. ​ Is it done as retaliation if one partner does not give\\+times and never by virgins. ​ Is it done as retaliation if one partner does not give
 any sperm? ​ Do they run out, and perhaps later in life focus on egg laying? any sperm? ​ Do they run out, and perhaps later in life focus on egg laying?
  
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 The rapid morphological changes are among the evidence for sex The rapid morphological changes are among the evidence for sex
-selection, as well as the high cost of courtship/​mating. ​ There is\\+selection, as well as the high cost of courtship/​mating. ​ There is
 some evidence for sperm competition. some evidence for sperm competition.
  
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 Their egg laying habits in the field are uncertain. ​ Perhaps under Their egg laying habits in the field are uncertain. ​ Perhaps under
-leaflitter. ​ They do not dig holes in moist soil like garden\\+leaflitter. ​ They do not dig holes in moist soil like garden
 snails. In the lab at 19^C, they take seven weeks to hatch, snails. In the lab at 19^C, they take seven weeks to hatch,
-sometimes two to three weeks longer. ​ The record for a clutch is\\+sometimes two to three weeks longer. ​ The record for a clutch is
 seventy-five eggs (but this could have been multiple clutches since seventy-five eggs (but this could have been multiple clutches since
-they don't check every day).  Egg size varies. ​ //​Dollicophallus//​\\+they don't check every day).  Egg size varies. ​ //​Dollicophallus//​
 eggs are almost the size of jellybelly and weigh up to half a gram. eggs are almost the size of jellybelly and weigh up to half a gram.
 For //​californicus//​ they'​re usually under 0.3g. For //​californicus//​ they'​re usually under 0.3g.
  
 Egg laying starts in fall and copulation is associated with foggy Egg laying starts in fall and copulation is associated with foggy
-nights (late summer, Santa Cruz). ​ Eggs are laid October through\\+nights (late summer, Santa Cruz). ​ Eggs are laid October through
 December when the rains come and usually finished by February. December when the rains come and usually finished by February.
-Hypothesis: Low pressure systems trigger egg laying. ​ (This is based\\+Hypothesis: Low pressure systems trigger egg laying. ​ (This is based
 on lab observations,​ and makes sense since dehydration is the highest on lab observations,​ and makes sense since dehydration is the highest
-mortality source. ​ You want to lay eggs at the start of the rainy season\\+mortality source. ​ You want to lay eggs at the start of the rainy season
 in a moist place.) in a moist place.)
  
lecture_notes/04-23-2010.1272479900.txt.gz ยท Last modified: 2010/04/28 11:38 by karplus