Morphology of the ovary of Caiman crocodilus (Crocodylia: Alligatoridae)

Calderón, Martha L.; Pérez, Gloria Romero de; Ramírez‐Pinilla, Martha Patricia

doi:10.1016/s0940-9602(04)80113-4

Cited by 33 publications

(40 citation statements)

References 19 publications

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“…The gonadal histoarchitecture of the non-reproductive C. latirostris females examined was similar to that of other crocodilians, such as C. crocodilus (CALDERÓN et al 2004) and A. mississippiensis (URIBE & GUILLETTE 2000). The chordolacunar type ovary has also been described in birds and testudines (CALLEBAUT 1988, CERIANI & WYNEKEN 2008.…”

Section: Discussionsupporting

confidence: 65%

“…CALDERÓN et al (2004) using ultra-thin sections identified fibers of elastin lamina underline the epithelium of C. crocodiles. However, these fibers were not observed in our study using the staining with Weigert's resorcinfuchsin.…”

Section: Discussionmentioning

confidence: 97%

“…Oocytes and follicles were classified according to previously established criteria for A. mississippiensis and C. crocodilus (URIBE & GUILLETTE 2000, CALDERÓN et al 2004). In the stages I and II (or early previtellogenesis) oocyte growth is initiated and in stage III follicles are in advanced stages of previtellogenesis.…”

Section: Methodsmentioning

confidence: 99%

“…In crocodilians, the reproductive system has been described of Alligator mississippiensis (Daudin, 1802) (JOSS 1989, GUILLETTE et al 1994, 1995, URIBE & GUILLETTE 2000, Caiman crocodilus (Linnaeus, 1758) (CALDERÓN et al 2004) and Caiman yacare (COUTINHO et al 2005). In C. latirostris, VERDADE (1995) described the reproductive biology of males and females and STOKER et al (2003and STOKER et al ( , 2008 reported alterations in the follicular dynamics and steroid levels caused by exposure to endocrine disruptor chemicals (EDCs).…”

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confidence: 99%

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Histological and immunohistochemical study of the ovaries and oviducts of the juvenile female of Caiman latirostris (Crocodilia: Alligatoridae)

Machado-Santos¹,

Santana²,

Vargas³

et al. 2015

Zoologia (Curitiba)

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Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Histological and immunohistochemical study of the ovaries and oviducts of the juvenile female of Caiman latirostris (Crocodilia: Alligatoridae)

Machado-Santos¹,

Santana²,

Vargas³

et al. 2015

Zoologia (Curitiba)

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“…Atretic follicles in different development stages were also visualized in the ovarian stroma of K. scorpioides (Fig.1B). In these structures the connective tissue gradually occupies the follicle, and the follicular layers are disorderly arranged similarly in the japanese quail C. coturnix (Nasser Junior et al 1994) and in the crocodile (Caiman crocodiles) (Calderón et al 2004). …”

Section: Resultsmentioning

confidence: 99%

Morphological aspects of the ovaries of turtle Kinosternon scorpioides raised in captivity

Chaves¹,

Oliveira

Araújo³

et al. 2012

Pesq. Vet. Bras.

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Pesq. Vet. Bras. 32(7):667-671, julho 2012 667 RESUMO.-[Aspectos morfológicos dos ovários da tartaruga Kinosternon scorpioides criada em cativeiro.]O jurará (Kinosternon scorpioides) é um cágado da Região Amazônica que sofre com as capturas desordenadas nos interiores maranhenses e que apesar da sua popularidade nessas áreas, os dados relacionados à morfologia reprodutiva ainda são poucos esclarecedores, o que diϐiculta a adoção de medidas para preservação da espécie. Desta forma, caracterizou-se morfologicamente os ovários de fêmeas adultas de jurara oriundas de cativeiro através da análise morfológica e morfométrica em dois períodos do ano, seco e o chuvoso. Os resultados comprovaram que todas as fê-meas eram maduras sexualmente e se encontravam em período vitelogênico. Os ovários são duas estruturas irregulares constituídas por diversos folículos em desenvolvimento (primários, secundários e terciários) sobre um estroma de tecido conjuntivo frouxo ricamente vascularizado, com The swear turtle "jurará" (Kinosternon scorpioides) is a mud turtle of the Amazon region exposed to disordering capture in the rural areas of Maranhão, Brazil. Despite its popularity in these areas, little meaningful information regarding the reproductive morphology is currently available, fact that impedes the adoption of policies for preservation of the species. To obtain more information, we studied the ovarian morphology adult jurará females kept in captivity by morphological and morphometric analysis in the dry and rainy season. The results revealed that all females were sexually mature and were in a vitellogenic period. The ovaries are two irregular structures composed by follicles in different stages of development (primary, secondary and tertiary) scattered in a stroma of loose connective highly vascularized tissue. The ovary weight was 6.25±4.23g and 2.27±1.42g, for the right and left one respectively. The gonadosomatic indexes were 2.06% for the dry season and 1.79% for the rainy season. The average of the follicles was 29.83 units per ovary. Microscopically, the mature ovaries revealed a basal layer composed by four cellular layers: the inner and outer theca, stratum granulosum with perivitelline membrane and zona radiata with vitelline membrane. No signiϐicant differences were observed in the ovaries either in the dry or wet period.

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Developmental morphology of the neonatal alligator (Alligator mississippiensis) ovary

Moore

Uribe-Aranzábal

Boggs

et al. 2007

Journal of Morphology

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American alligator (Alligator mississippiensis) ovary development is incomplete at hatching. During the months following hatching, the cortical processes of oogenesis started in ovo continues and folliculogenesis is initiated. Additionally, the medullary region of the gonad undergoes dramatic restructuring. We describe alligator ovarian histology at hatching, 1 week, 1 month, and 3 months of age in order to characterize the timing of morphological development and compare these findings to chicken ovary development. At hatching, the ovarian cortex presents a germinal epithelium containing oogonia and a few primary oocytes irregularly scattered between somatic epithelial cells. The hatchling medulla shows fragmentation indicative of the formation of lacunae. By 1 week of age, oocytes form growing nests and show increased interactions with somatic cells, indicative of the initiation of folliculogenesis. Medullary lacunae increase in diameter and contain secretory material in their lumen. At 1 month, nest sizes and lacunar diameters continue to enlarge. Pachytene oocytes surrounded by somatic cells are more frequent. Trabeculae composed of dense irregular connective tissue divide cortical nests. Three months after hatching oocytes in meiotic stages of prophase I up to diplotene are present. The ovary displays many enlarged follicles with oocytes in diplotene arrest, thecal layers, lampbrush chromosomes, and complete layers of follicular cells. The medulla is an elaborated complex of vascularized lacunae underlying the cortex and often containing discrete lymphoid aggregates. While the general morphology of the alligator ovary is similar to that of the chicken ovary, the progression of oogenesis and folliculogenesis around hatching is notably slower in alligators. Diplotene oocytes are observed at hatching in chickens, but not until 3 months in alligators. Folliculogenesis is completed at 3 weeks in chickens whereas it is still progressing at 3 months in alligators.

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Morphology of the ovary of Caiman crocodilus (Crocodylia: Alligatoridae)

Cited by 33 publications

References 19 publications

Histological and immunohistochemical study of the ovaries and oviducts of the juvenile female of Caiman latirostris (Crocodilia: Alligatoridae)

Histological and immunohistochemical study of the ovaries and oviducts of the juvenile female of Caiman latirostris (Crocodilia: Alligatoridae)

Morphological aspects of the ovaries of turtle Kinosternon scorpioides raised in captivity

Developmental morphology of the neonatal alligator (Alligator mississippiensis) ovary

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