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Reproductive morphology and Spermatogenesis in Dermanyssus gallinae (DeGeer) (Acari: Dermanyssidae)
Author(s) -
Pound J. Mathews,
Oliver James H.
Publication year - 1976
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051500404
Subject(s) - biology , spermatogenesis , insemination , sperm , andrology , anatomy , reproduction , zoology , meiosis , gamete , endocrinology , botany , ecology , genetics , gene , medicine
Sperm induction pores, tubuli annulati, rami sacculi, sacculus foemineus, cornu sacculus and acantho‐membranous hood in female Dermanyssus gallinae support the probability of coxal insemination as reported for some other mesostigmatid species. Development of the circular testis in males (from fusion of two anterolaterally projecting protonymphal testicular arms) and formation of haploid (n = 3) spermatids from haploid (n = 3) spermatogonial cells is entirely mitotic. Spermatogenesis begins within one hour after protonymphal feeding and continues through adult ecdysis in normally fed individuals. Nutritional deficit causes cessation of spermatogenic divisions in deutonymphs starved 23 days, but is rapidly rejuvenated upon feeding. No rejuvenation of division was observed in adult males given the opportunity to feed, thus adult males might not feed.