Reproductive cycle of the Amazonian planktivorous catfish Hypophthalmus marginatus (Siluriformes, Pimelodidae)
| Autor: | Luciano Queiroz, Wagner Cotroni Valenti, Daniel Guimarães Figueiredo‐Ariki, Rafael Yutaka Kuradomi, Wei Ge, Sergio Ricardo Batlouni, Patrick Hainfellner, Rafael Tomoda Sato, Patricia Maria Contente Moraes Valenti, Guilherme Antônio de Freitas, Thiago Gonçalves de Souza |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
business.industry Amazonian Zoology 04 agricultural and veterinary sciences Aquatic Science Biology Reproductive cycle biology.organism_classification Spawn (biology) 03 medical and health sciences Pimelodidae Aquaculture 040102 fisheries 0401 agriculture forestry and fisheries Vitellogenesis business Domestication 030304 developmental biology Catfish |
| Zdroj: | Aquaculture Research. 50:3382-3391 |
| ISSN: | 1365-2109 1355-557X |
| DOI: | 10.1111/are.14296 |
| Popis: | We evaluated the annual process of oocyte and ovarian development of the planktivorous Amazonian catfish, the mapara (Hypophthalmus marginatus), aiming to support captive reproduction for domestication. A total of 149 females were captured from the Tocantins River at the Tucurui Dam (3°49'55"S, 49°39'9"W) in 13 sampling events. For each individual, we evaluated ovary histology and plasma steroid concentrations. Two annual reproductive cycles, with similar characteristics, including a long period of rest, a short vitellogenic stage and a well‐defined spawning season from November to March, were described. A 17β‐estradiol (E₂) rise and a 17α,20β‐dihydroxy‐4‐pregnen‐3‐one (DHP) peak were associated with vitellogenesis and spawning season, respectively, in the first cycle but not in the second reproductive cycle. In conclusion, the studied species presents a reproductive cycle similar to that of other migratory total spawners; however, unusually for this group of fish, there were three (but not two) batches of vitellogenic oocytes in “in maturation” and “mature” stage ovaries, pointing to the possibility of more than one spawn during the spawning season. |
| Databáze: | OpenAIRE |
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