Abstract:
:The common snook, Centropomus undecimalis, was induced to ovulate using a time-release, GnRH analogue. Ovulation occurred the afternoon or evening the day after hormone administration. The time of ovulation was established within half an hour. At ovulation, three fish per time-group were divided into 0, 6, 12, 18 hr and one thru five days post-ovulation to study changes in the postovulatory follicle complex (POC). Histology of the ovaries revealed changes in the POC, postovulatory follicle (POF) and oocyte atresia through five days post-ovulation. Within 24 hr, nuclei of the POF cells lost their initial spherical or oval configuration, and by four days the basement membrane within the POC had fragmented. There was a temporal separation between ovulation and post-ovulation folliculogenesis; that is, in that the formation of new follicles commenced within the germinal epithelium between 12-48 hrs after ovulation. Morphology of the POC was best revealed with the reticulin stain; it is composed of the POF and postovulatory theca (POT). These are separated by a basement membrane, reflecting the origin of a follicle from a germinal epithelium while the theca is derived from stroma. The POF is composed of the former follicle cells that surrounded and contacted the oocyte during its development; the follicle is composed of the oocyte and its surrounding follicle cells. The POC is composed of a prominent basement membrane separating the POT from the POF. The reticulin stain clearly defines compartmentation in the ovary and supports redefinition of the POF as the follicle cells that formerly surrounded the oocyte prior to ovulation. J. Morphol. 278:547-562, 2017. © 2017 Wiley Periodicals, Inc.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Grier HJ,Neidig CL,Quagio-Grassiotto Idoi
10.1002/jmor.20652subject
Has Abstractpub_date
2017-04-01 00:00:00pages
547-562issue
4eissn
0362-2525issn
1097-4687journal_volume
278pub_type
杂志文章abstract::Freshwater sponges of the family Spongillidae reproduce sexually through formation of a parenchymula larva. The cytochemical characteristics of parenchymula larval metamorphosis - beginning with the blastula and terminating with the motile escape stage - for the spongillid Eunapius fragilis (Leidy) have been defined u...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051450202
更新日期:1975-02-01 00:00:00
abstract::The functioning of the vertebrate eye depends on its absolute size, which is presumably adapted to specific needs. Eye size variation in lidless and spectacled colubrid snakes was investigated, including 839 specimens belonging to 49 genera, 66 species and subspecies. Variations of adult eye diameters (EDs) in both ab...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20028
更新日期:2012-08-01 00:00:00
abstract::The morphology of ctenostome bryozoans remains little investigated with only few species having been subject to more detailed studies. From all the seven main different superfamilies, only few representatives have been studied. The superfamily Arachnidioidea has particularly been neglected concerning detailed morpholo...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21275
更新日期:2020-12-01 00:00:00
abstract::The latest research on direct developing caecilian and anuran species indicate presence of only one generation of taste organs during their ontogeny. This is distinct from indirect developing batrachians studied thus far, which possess taste buds in larvae and anatomically distinct taste discs in metamorphs. This stud...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20544
更新日期:2016-07-01 00:00:00
abstract::Branchial food traps are regions of specialized secretory tissue in the tadpole pharynx, where suspended food particles are trapped in mucus. Light and scanning electron microscopy were used to study branchial food traps from larvae of ten anuran families (36 species). Most anuran larvae from "advanced" (suborder Neob...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051590307
更新日期:1979-03-01 00:00:00
abstract::Head structures of the leaf mining larva of the chrysomelid species Podagricomela shirahatai are described and illustrated. Internal and external structures were reconstructed three dimensionally based on image stacks obtained with microcomputed tomography. The larval head is characterized by prognathism, a dorsoventr...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20352
更新日期:2015-04-01 00:00:00
abstract::The cloacal complex of Crocodylus porosus is composed of three chambers (proctodaeum, urodaeum, and coprodaeum) separated by tight, muscular sphincters. The proctodaeum is proximal to the cloacal vent and houses the genitalia. The urodaeum is the largest chamber, is capable of storing large quantities of urine, and is...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/1097-4687(200008)245:2<168::AID-JMOR7>3.0.
更新日期:2000-08-01 00:00:00
abstract::This research was designed to follow up the observation of Thornton and Kraemer ('51) that regressed, denervated limbs of Ambystoma larvae will not regenerate upon reinnervation if all digits on the limbs were not completely resorbed. The object of this experiment was to determine whether the presence of an apical str...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051540204
更新日期:1977-11-01 00:00:00
abstract::The red pulp of the spleens of the short-finned pilot whale (Globicephala macrorhynchus) and the Pacific bottle-nosed dolphin (Tursiops truncatus gilli) (Odontoceti) were examined by light and electron microscopy and found to comprise two venous layers, an inner and an outer. The inner layer is homologous to the inter...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052210210
更新日期:1994-08-01 00:00:00
abstract::Timed-sequence studies have shown that reticulate scales on the ventral footpads of birds do not undergo "epidermal placode" formation during their morphogenesis, but arise as symmetrical evaluations similar to the scales of snakes and lizards. Unlike the scutellate scales on the dorsal surface of the foot, in which t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051540106
更新日期:1977-10-01 00:00:00
abstract::Histological and electron-microscopical studies of the head-kidney ontogenesis in a group of bottomspawner and mouthbrooder cichlid fishes reveal that this organ undergoes three functional and structural stages. At the initial stage, 2-12 days after fertilization, the head-kidney is a filtering organ of two glomeruli ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199607)229:1<1::AID-JMOR1>
更新日期:1996-07-01 00:00:00
abstract::This study examines the morphology of sporadic congenital microphthalmia in 1-day-old chicks, with particular emphasis on the neural retina. On the basis of the size of the eyeball it is possible to classify microphthalmia into two groups, severe and mild. In severe microphthalmia (less than 5 mm in equatorial diamete...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051990102
更新日期:1989-01-01 00:00:00
abstract::Nuclear egress, also referred to as nuclear envelope (NE) budding, is a process of transport in which vesicles containing molecular complexes or viral particles leave the nucleus through budding from the inner nuclear membrane (INM) to enter the perinuclear space. Following this event, the perinuclear vesicles (PNVs) ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20796
更新日期:2018-05-01 00:00:00
abstract::During epidermal differentiation in mammals, keratins and keratin-associated matrix proteins rich in histidine are synthesized to produce a corneous layer. Little is known about interkeratin proteins in nonmammalian vertebrates, especially in reptiles. Using ultrastructural autoradiography after injection of tritiated...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10181
更新日期:2004-02-01 00:00:00
abstract::Non-innervated macrotrichia and microtrichia, thick-walled chemoreceptors and three kinds of thin-walled chemoreceptors are present on the antennal flagellum of Frenesia missa. One of the thin-walled receptors, the plate organ, is of a type not previously recorded for any insect. About four times as many plate organs ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051350309
更新日期:1971-11-01 00:00:00
abstract::The morphology of the spermatozoon of representative species of the subfamily Nesomyinae (Muroidea: Nesomyidae), a monophyletic group of rodents endemic to Madagascar, was examined by light and electron microscopy to determine the sperm head shape and tail length across the species. Marked interspecific differences we...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10889
更新日期:2010-12-01 00:00:00
abstract::The spleen of sea bass (Dicentrarchus labrax) is composed mainly of red pulp, whereas the white pulp is poorly developed. The red pulp consists of clear reticular cells intermingled with blood cells, sinusoids, and melanomacrophage centers (MMCs). The MMCs are enclosed by an interrupted connective tissue capsule and s...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052060304
更新日期:1990-12-01 00:00:00
abstract::The overall anatomy of Neodasys as well as data for hemoglobin-containing cells are described. Hemoglobin-containing cells are shown to be mesodermal specializations constituting approximately 14% of the animal's total body volume (4.87 ± 104 μl). These globular cells (10-14 μm) are situated in two longitudinal rows, ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051750106
更新日期:1983-01-01 00:00:00
abstract::Cetacean middle ears are unique among mammals in that they have an elongated tympanic membrane, a greatly reduced manubrium mallei, and an incudal crus longum that is shorter than the crus breve. Elongation of the tympanic membrane and reduction of the manubrium is thought to be related to an evolutionary rotation of ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1044
更新日期:2001-08-01 00:00:00
abstract::Sexual dimorphism in the distribution of antennal sense organs is common among adults of the genus Periplaneta. In three out of the four strains of Periplaneta americana examined, adult males had more contact chemoreceptros than females. In the fourth strain of P. americana and in P. australasiae, P. brunnea, P. fulig...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051490202
更新日期:1976-06-01 00:00:00
abstract::Mengenillidae is a small, basal family of Strepsiptera, mainly characterized by free-living females in contrast to the endoparasitic females of Stylopidia. Here, we describe external and internal structures of the female abdomen of Eoxenos laboulbenei (Mengenillidae). The external morphology was examined and documente...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20981
更新日期:2019-05-01 00:00:00
abstract::The function of the septomaxilla of nonmammalian synapsids has long been problematic. Distinctive features of this bone, including a prominent intranarial process and a septomaxillary canal and foramen, are characteristic of pelycosaurs and nonmammalian therapsids, but are lost in their mammalian descendants. Numerous...
journal_title:Journal of morphology
pub_type: 杂志文章,评审
doi:10.1002/1097-4687(200007)245:1<29::AID-JMOR3>3.0.C
更新日期:2000-07-01 00:00:00
abstract::Sipuncula is a clade of unsegmented marine worms that are currently placed among the basal radiation of conspicuously segmented Annelida. Their new location provides a unique opportunity to reinvestigate the evolution and development of segmented body plans. Neural segmentation is clearly evident during ganglionic ven...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21054
更新日期:2019-11-01 00:00:00
abstract::Scanning electron microscopy of postnatally developing gerbil vagina (birth to maturity) shows that longitudinal folds form prior to transverse folds; the process of fold formation is initiated on the dorsal wall and proceeds ventrally. From days 1 to 7 postnatally, the vaginal epithelium is composed of either flat or...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052010309
更新日期:1989-09-01 00:00:00
abstract::Nematocytes containing microbasic mastigophores are intimately associated with accessory cells in the epidermis of Chironex fleckeri. Large microbasic mastigophores may be surrounded by seven to nine such cells. Each accessory cell possesses an apical portion containing secretory droplets and a basal portion which car...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051950110
更新日期:1988-01-01 00:00:00
abstract::The innervation of the musculature of the tongue and the hyobranchial apparatus of caecilians has long been assumed to be simple and to exhibit little interspecific variation. A study of 14 genera representing all six families of caecilians demonstrates that general patterns of innervation by the trigeminal, facial, g...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052120105
更新日期:1992-04-01 00:00:00
abstract::The design of minimum-weight structures that retain their integrity under dynamic loading regimes has long challenged engineers. One solution to this problem found in both human and biological design is the optimization of weight and strength by hollowing a structure and replacing its inner core with supportive struts...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10302
更新日期:2006-10-01 00:00:00
abstract::Spermatogenesis discontinues during both adult reproductive diapause and quiescence in the flightless males of Omorgus freyi. During both types of dormancy, spermatogenesis discontinuity is a dynamic process involving an uninterrupted supply of primary spermatocytes that undergoes partial development and lyses before ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052180309
更新日期:1993-12-01 00:00:00
abstract::High speed cinematography was used to record the feeding activities of terrestrial Ambystoma tigrinum melanostictum. A description of these activities based on films of more than 50 feeding sequences is presented, and the mechanical units involved are defined, described, and functionally analyzed. Evolutionary implica...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051470203
更新日期:1975-10-01 00:00:00
abstract::Correlative studies of luminescent responses, light and electron microscopy of Porichthys photophores during development were conducted. The photophores differentiate as an outgrowth of the basal cell layer of the epidermis, from which they delaminate into the dermis. Reflector cells are formed from dermal fibroblasts...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051510305
更新日期:1977-03-01 00:00:00