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| Autori principali: | , , , , , , , |
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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
PeerJ
2025
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| Soggetti: | |
| Accesso online: | https://pubmed.ncbi.nlm.nih.gov/40487069/ |
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| author | Bastos, Nathália Terra, Carolina Siqueira Safra Siqueira, Márcio Alves Vieira, Lourença Helena de Oliveira Mota, Caio de Lima de Barros Neto, Halesio Milton Correa Cavalcanti, Guarani de Hollanda Coutinho, Ricardo |
| author_facet | Bastos, Nathália Terra, Carolina Siqueira Safra Siqueira, Márcio Alves Vieira, Lourença Helena de Oliveira Mota, Caio de Lima de Barros Neto, Halesio Milton Correa Cavalcanti, Guarani de Hollanda Coutinho, Ricardo Bastos, Nathália Terra, Carolina Siqueira Safra Siqueira, Márcio Alves Vieira, Lourença Helena de Oliveira Mota, Caio de Lima de Barros Neto, Halesio Milton Correa Cavalcanti, Guarani de Hollanda Coutinho, Ricardo |
| collection | PubMed - marine biology |
| contents | Assessment of the fecundity of deep-sea corals in southeastern Brazil. Bastos, Nathália Terra, Carolina Siqueira Safra Siqueira, Márcio Alves Vieira, Lourença Helena de Oliveira Mota, Caio de Lima de Barros Neto, Halesio Milton Correa Cavalcanti, Guarani de Hollanda Coutinho, Ricardo Animals Brazil Fertility Anthozoa Oocytes Reproduction Female Ecosystem Deep-sea corals have been facing several anthropogenic threats worldwide, making it increasingly important that studies better understand their reproductive biology and associated cycles. This study described the fecundity of the main habitat-building scleractinian species in three sedimentary basins of southeastern Brazil in two pre-determined periods over 2 years. These basins are responsible for the most significant oil and gas production on the Brazilian coast. The relation between the number of gametes and the size of the individuals' polyps determines their fecundity. , , (formerly ), and samples were obtained in 2016 and 2017 and histologically prepared to estimate the reproductive effort of these species. Each oocyte development stage was classified and counted to evaluate the reproduction strategies of each species. A single polyp (collected in May 2017) showed over 241 thousand oocytes and a 167.9 oocytes/mm fecundity, typical of periodic reproduction. had the highest average fecundity (53.6 ± 10.7 oocytes/mm) of the species with a continuous gametogenic cycle. showed 23.5 ± 7.03 oocytes/mm, whereas had the lowest fecundity (3.1 ± 0.7 oocytes/mm). Fecundity is inversely proportional to oocyte size, and showed the largest oocytes (900 μm), a result aligned with previous studies. Considering the entire sample, the Espírito Santo Basin was the most productive due to its highest average fecundity (followed by the Santos and the Campos Basins) and greatest number of female samples. Notably, 2017 showed the highest average fecundity. The reproductive strategies of organisms play an important role in the ability of species to respond to selective pressures since gamete production (especially oocytes) is energetically expensive and strongly sensitive to environmental conditions. Thus, this study contributes to refining the available data about the life history and resilience strategies of deep-water corals, providing scientific information to manage and conserve these deep-sea ecosystems. |
| format | Artículo científico |
| id | pubmed_40487069 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | PeerJ |
| record_format | pubmed |
| spellingShingle | Assessment of the fecundity of deep-sea corals in southeastern Brazil. Bastos, Nathália Terra, Carolina Siqueira Safra Siqueira, Márcio Alves Vieira, Lourença Helena de Oliveira Mota, Caio de Lima de Barros Neto, Halesio Milton Correa Cavalcanti, Guarani de Hollanda Coutinho, Ricardo Animals Brazil Fertility Anthozoa Oocytes Reproduction Female Ecosystem Assessment of the fecundity of deep-sea corals in southeastern Brazil. Bastos, Nathália Terra, Carolina Siqueira Safra Siqueira, Márcio Alves Vieira, Lourença Helena de Oliveira Mota, Caio de Lima de Barros Neto, Halesio Milton Correa Cavalcanti, Guarani de Hollanda Coutinho, Ricardo Animals Brazil Fertility Anthozoa Oocytes Reproduction Female Ecosystem Deep-sea corals have been facing several anthropogenic threats worldwide, making it increasingly important that studies better understand their reproductive biology and associated cycles. This study described the fecundity of the main habitat-building scleractinian species in three sedimentary basins of southeastern Brazil in two pre-determined periods over 2 years. These basins are responsible for the most significant oil and gas production on the Brazilian coast. The relation between the number of gametes and the size of the individuals' polyps determines their fecundity. , , (formerly ), and samples were obtained in 2016 and 2017 and histologically prepared to estimate the reproductive effort of these species. Each oocyte development stage was classified and counted to evaluate the reproduction strategies of each species. A single polyp (collected in May 2017) showed over 241 thousand oocytes and a 167.9 oocytes/mm fecundity, typical of periodic reproduction. had the highest average fecundity (53.6 ± 10.7 oocytes/mm) of the species with a continuous gametogenic cycle. showed 23.5 ± 7.03 oocytes/mm, whereas had the lowest fecundity (3.1 ± 0.7 oocytes/mm). Fecundity is inversely proportional to oocyte size, and showed the largest oocytes (900 μm), a result aligned with previous studies. Considering the entire sample, the Espírito Santo Basin was the most productive due to its highest average fecundity (followed by the Santos and the Campos Basins) and greatest number of female samples. Notably, 2017 showed the highest average fecundity. The reproductive strategies of organisms play an important role in the ability of species to respond to selective pressures since gamete production (especially oocytes) is energetically expensive and strongly sensitive to environmental conditions. Thus, this study contributes to refining the available data about the life history and resilience strategies of deep-water corals, providing scientific information to manage and conserve these deep-sea ecosystems. |
| title | Assessment of the fecundity of deep-sea corals in southeastern Brazil. |
| topic | Animals Brazil Fertility Anthozoa Oocytes Reproduction Female Ecosystem |
| url | https://pubmed.ncbi.nlm.nih.gov/40487069/ |