RIBBLE, D.O. 1980 PEROMYSCUS CALIFORENIENS (15) Hastings Reservoir, Monterey Co. Calif. April 21 #1231 ♀ mm, nullip. 23g. Ear-tagged. Grid RC, St 8,18. Blood, ear, saliva coll 22 April See Act 23 April Offspring of 1979. #1232 ♀ mm, nullip. 22g. " - " . Grid RC, St 9,18. Blood, ear, saliva 22 April See notes on #1231 above. No sign of powder. See SPP Act 25 April: caught up RED powder covering, thus offspring of 1979. We radio-collared 5 animals on Grid RC this evening as follows: radio- collared #0360 ♂ scotal, 39g. St 4,8. Ch #7 (mate of 1917) #1917 ♀, teats swollen, milk 41.5g. St 4,8. Ch #14. Dusted RED #1146 ♀, pregnant. 48g. St 5,13. Ch #12. Dusted PURPLE #1152 ♂, scotal. 39g. St 7,9. Ch #82 (mate of 1137♀) (looks like she could give birth soon!) #1979 ♀, very pregnant. 50g. St 8,17. Ch #8. Dusted RED. April 22 #1233 ♂ Early Mat, TWD 34g. Ear-tagged. Grid RC, St 10,9. Blood, ear, saliva collect (white tail tip) 1234 ♀ M, imp, parous. 48g. " - " . " St 5,8. 1235 ♂ Late SAD, TWD 32g " - " . " St 8,15. * None of these animals had any sign of powder, so presumably they are all immigrants. This AM we radio-collared #1944, ♂ scotal, 43g, St 8,15 (mate of 1142). Ch #4 We went out this PM for telemetry, but do to the rain we only got locations once before heading home. (Cuticle-tail tip) April 23 #1236 ♀ SAD, nullip. 32g. Ear-tagged. Grid RC, St 6,17 - Blood, ear, saliva coll. No sign of any powder, probably immigrant. This am Marco changed the radio-collar on #0360 from Ch. 7 to a new collar at Ch #18. The original collar quit working for some reason. clearly This PM caught #1231 on RC at station 9,17 with RED powder visible in its ears; thus she is probably offspring of 1979