Synchrony on the reef: how environmental factors shape coral spawning patterns in Acropora corals in the Maldives DOI Creative Commons
Kate Sheridan,

Margaux A.A. Monfared,

Simon Dixon

и другие.

PeerJ, Год журнала: 2025, Номер 13, С. e19447 - e19447

Опубликована: Май 28, 2025

Elucidating our knowledge on the reproductive phenology of scleractinian corals and environmental drivers synchronicity is pivotal for assessing gene flow between populations potential ecosystem recovery. The timing gamete release in sessile broadcast spawning key to successful reproduction; dependent a complex interaction an organism’s genes external factors. In this study we assessed effect various factors Acropora Maldives. A total 3,026 colonies from 24 species were recorded October 2021 May 2024: 1,709 20 North Male Atoll 1,317 18 Baa Atoll. Generalised linear models (GLMs) used estimate average daily wind speed (mph), precipitation (mm), tide depth (m), mean sea surface temperature (SST) over 30-day period prior spawning, proportion spawn per day deviation full moon. Models run all corals, three which more than 30 days observed enabling robust statistical be tested: A. secale , tenuis humilis determine presence species-specific relationships. Based additional GLMs, found that change SST does not likelihood occur given month, but significantly predict number month. We also relationship as predictor probability or monthly temporal scale can specific. significant, positive correlation levels day, however, there some variations species. Additionally, higher spawned closer Spawning events moon are correlated with lower depths across both atolls. This will beneficial management reef systems Maldives following global bleaching event, due increased reliance targeted conservation measures retain diversity re-populate degraded reefs, such in-situ larval settlement. While analyses goes someway explaining variability patterns within genus Maldives, must conclude other remain unexplored, wide range ecologically appropriate conditions spawning. However, results highlight importance considering conditions, relationships, when predicting spatial deviations

Язык: Английский

Reproductive phenology and sexual propagation of the pink sea fan Eunicella verrucosa Pallas, 1766 for coral restoration DOI Creative Commons
Christina Egger, Catarina Melo,

Brian J. Marquardt

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Abstract The widespread decline of coral-dominated ecosystems due to human disturbances has highlighted the urgent need for active habitat restoration. Coral restoration using sexually produced individuals instead clonal fragments is essential reduce impacts on donor populations and promote genetic diversity, which vital adaptability environmental changes. However, most coral species, particularly those in temperate deep-water (> 50 m), critical knowledge reproduction larval ecology ex situ sexual propagation lacking. To address this gap, study, we provide first report spawning octocoral Eunicella verrucosa North-East Atlantic describe details development settlement. annual reproductive timing South-West Portugal was determined from samples collected as fisheries bycatch a single population source monitored comparison across distinct durations conditions. species exhibited split-spawning over about one month (mid September – mid October), with 3 major events approximately every 2 weeks. Spawning patterns suggest lunar periodicity but shifted between colonies kept Oocytes were positively buoyant developed into swimming larvae after days. Settlement trials substrates like natural rock, CCA, gorgonian skeleton, showed behaviour testing two weeks post-spawning, settlement activity continuing three months. Fully recruits observed month, sclerite production starting before tentacle development. New continued up months, indicating prolonged competency period. This study provides crucial data efforts ex situ vulnerable species.

Язык: Английский

Процитировано

0
Photobiota of the Tropical Red Sea: Fatty Acid Profile Analysis and Nutritional Quality Assessments DOI Creative Commons

Sarah A. Gozai-Alghamdi,

Samir M. Aljbour,

Sapta Priyana Amin

и другие.

Molecules, Год журнала: 2025, Номер 30(3), С. 621 - 621

Опубликована: Янв. 31, 2025

Photosynthetic organisms are primary sources of marine-derived molecules, particularly ω3 fatty acids (FAs), which influence the quality marine foods. It is reported that tropical possess lower FA nutritional than those from colder oceans. However, high biodiversity known for areas may help compensate this deficiency by producing a diversity molecules with benefits ecosystem. Here we addressed aspect analyzing profiles 20 photosynthetic salty and warm Red Sea, hot spot, including cyanobacteria, eukaryotic microalgae, macroalgae, mangrove leaves, as well three selected reef's photosymbiotic zooxanthellate corals jellyfish. Using direct transesterification, gas chromatography-mass spectrometry, absolute quantification, indexes, evaluated their lipid qualities. We observed interspecific strain-specific variabilities in qualities, unique environmental conditions Sea to explain. Generally, microalgae exhibited highest quality. The previously unanalyzed diatoms Leyanella sp. Minutocellus had eicosapentaenoic acid (EPA) contents. bioprospected photobiota pharmaceutical nutraceutical potential. By sourcing quantifying these bioactive compounds, highlight untapped rich showcase opportunities harness potentials.

Язык: Английский

Процитировано

0
First spawning record of the widespread Indo-Pacific Pavona maldivensis observed in the Red Sea DOI Creative Commons
Neus Garcías-Bonet, Marco Casartelli, Silvia Vimercati

и другие.

Frontiers in Marine Science, Год журнала: 2025, Номер 12

Опубликована: Фев. 25, 2025

Information on coral reproductive biology and spawning times is crucial to advance basic applied research inform strategies for reef conservation restoration. Important efforts have been made collate patterns in global regional datasets. Here, we report document the first situ of Pavona maldivensis Gardiner, 1905, observed Red Sea. A medium size colony was releasing sperm full moon night 23 May 2024, at sunset time. Our observations suggest that widespread Indo-Pacific P. likely gonochoric. This timing contributes expanding databases provides valuable data its biology, which relevant restoration efforts.

Язык: Английский

Процитировано

0
Courtship and spawning behaviour of medaka in a semi-outdoor environment initiating at midnight DOI Creative Commons
Yuki Kondo, Satoshi Awata

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Май 16, 2025

Reproductive timing is a critical ecological trait that directly influences fitness. Medaka (Oryzias latipes), small freshwater fish, widely used as model organism in various scientific fields. However, studies conducted under (semi-) natural conditions remain limited. Although, spawning has been reported to occur within 1 h before and after sunrise, direct observations scarce. We investigated the of initiation associated courtship medaka through 24-h using infrared cameras semi-natural conditions. During experiments, sunrise occurred at approximately 4:45. Observations 31 pairs revealed between 1:05-9:48, with peak 2:00-4:00. Unlike previous reports but like most recent fieldwork, only 26% total events (8/31) were observed sunrise. Male behaviours, including following females quick circle displays, increased from midnight, peaking 2:00-5:00. This study provides new insights into reproductive medaka, suggesting possible adaptation nocturnal spawning, likely strategy reduce predation on both parents eggs. It also underscores importance investigating ecology organisms (semi-)natural gain more comprehensive understanding biological phenomena laboratory settings.

Язык: Английский

Процитировано

0
Synchrony on the reef: how environmental factors shape coral spawning patterns in Acropora corals in the Maldives DOI Creative Commons
Kate Sheridan,

Margaux A.A. Monfared,

Simon Dixon

и другие.

PeerJ, Год журнала: 2025, Номер 13, С. e19447 - e19447

Опубликована: Май 28, 2025

Elucidating our knowledge on the reproductive phenology of scleractinian corals and environmental drivers synchronicity is pivotal for assessing gene flow between populations potential ecosystem recovery. The timing gamete release in sessile broadcast spawning key to successful reproduction; dependent a complex interaction an organism’s genes external factors. In this study we assessed effect various factors Acropora Maldives. A total 3,026 colonies from 24 species were recorded October 2021 May 2024: 1,709 20 North Male Atoll 1,317 18 Baa Atoll. Generalised linear models (GLMs) used estimate average daily wind speed (mph), precipitation (mm), tide depth (m), mean sea surface temperature (SST) over 30-day period prior spawning, proportion spawn per day deviation full moon. Models run all corals, three which more than 30 days observed enabling robust statistical be tested: A. secale , tenuis humilis determine presence species-specific relationships. Based additional GLMs, found that change SST does not likelihood occur given month, but significantly predict number month. We also relationship as predictor probability or monthly temporal scale can specific. significant, positive correlation levels day, however, there some variations species. Additionally, higher spawned closer Spawning events moon are correlated with lower depths across both atolls. This will beneficial management reef systems Maldives following global bleaching event, due increased reliance targeted conservation measures retain diversity re-populate degraded reefs, such in-situ larval settlement. While analyses goes someway explaining variability patterns within genus Maldives, must conclude other remain unexplored, wide range ecologically appropriate conditions spawning. However, results highlight importance considering conditions, relationships, when predicting spatial deviations

Язык: Английский

Процитировано

0