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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spermatogenesis and gonadal cycle in male Tamoya haplonema and Chiropsalmus quadrumanus (Cnidaria, Cubozoa)

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Tiseo, Gisele R. [1] ; Garcia-Rodriguez, Jimena [1] ; Zara, Fernando J. [2, 3] ; Ames, Cheryl Lewis [4] ; Marques, Antonio C. [1] ; Morandini, Andre C. [5, 1]
Total Authors: 6
[1] Univ Sao Paulo, Dept Zool, Inst Biociencias, R Matao Trav 14, 101, BR-05508090 Sao Paulo - Brazil
[2] Univ Estadual Paulista UNESP, Dept Biol Aplicada, IML, Aquaculture Ctr CAUNESP, BR-14884900 Jaboticabal, SP - Brazil
[3] Univ Estadual Paulista UNESP, Inst Estudos Avancados Mar IEAMar, Via Acesso Prof Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil
[4] Smithsonian Inst, Natl Museum Nat Hist, Dept Invertebrate Zool, Washington, DC 20013 - USA
[5] Univ Sao Paulo, Ctr Biol Marinha, Rodovia Manoel Hypolito Rego, Km 131-5, BR-11600000 Sao Sebastiao - Brazil
Total Affiliations: 5
Document type: Journal article
Source: ZOOLOGISCHER ANZEIGER; v. 279, p. 59-67, MAR 2019.
Web of Science Citations: 1

Spermatogenesis has been little studied in cubozoans. This work describes spermatogenesis of two cubozoan species from Brazil, Tamoya haplonema and Chiropsalmus quadrumanus, using light microscopy and histochemical techniques to highlight and contrast stages of the gonadal cycle. Specimens were collected by hand at the water surface or with shrimp trawls in three areas in the state of Sao Paulo (SE Brazil): Cananeia lagoon estuarine system (south), Santos and Sao Vicente Bay (central), and Sao Sebastiao and Ubatuba (north). Male box jellyfish gonads are located between the mesoglea and gastrodermis in a thin and independent layer, organized in elongated follicles, macroscopically resembling a fingerprint pattern. After subsampling, serial sections were performed on male gonad tissue. The resulting slides were stained with hematoxylin and eosin and methods for staining proteins, acidic materials and neutral polysaccharides. Light microscopy revealed that the follicle wall of the male gonads of both cubozoan species is composed of spermatogonia. Spermatocytes are found peripherally near the follicle wall, while spermatids and spermatozoa are located towards the center. Sperm release occurs through rupture of the follicular wall into the gastric pockets. Four stages of gonad development were documented for T. haplonema and three for C. quadrumanus. The sperm of C. quadrumanus has a rounded head while in T. haplonema the sperm head is conical with an elongated apical projection. In both species, there was no positive histochemical reaction for putative acrosomal vesicles precursors. (c) 2019 Elsevier GmbH. All rights reserved. (AU)

FAPESP's process: 10/50174-7 - Systematics, life cycle and reproductive patterns of jellyfishes (Cnidaria: Medusozoa: Cubozoa and Scyphozoa) in the Baixada Santista (São Paulo, Brazil)
Grantee:André Carrara Morandini
Support type: BIOTA-FAPESP Program - Regular Research Grants
FAPESP's process: 11/50242-5 - Dimensions of marine life: patterns and process of diversifications in planktonic and benthic cnidarians
Grantee:Antonio Carlos Marques
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
Grantee:Fernando Luis Medina Mantelatto
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 13/50484-4 - Biodiversity and distribution patterns of the Medusozoa form the South-Western Atlantic
Grantee:Antonio Carlos Marques
Support type: Regular Research Grants