The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 893, P. 164873 - 164873
Published: June 16, 2023
Language: Английский
Proceedings of the Royal Society B Biological Sciences, Journal Year: 2023, Volume and Issue: 290(1996)
Published: April 11, 2023
Understanding the factors shaping patterns of ecological resilience is critical for mitigating loss global biodiversity. Throughout aquatic environments, highly mobile predators are thought to serve as important vectors energy between ecosystems thereby promoting stability and resilience. However, role these play in connecting food webs flow remains poorly understood most contexts. Using carbon nitrogen isotopes, we quantified use several prey resource pools (small oceanic forage, large oceanics, coral reef, seagrass) by 17 species elasmobranch fishes (
Language: Английский
Citations
27
Conservation Biology, Journal Year: 2024, Volume and Issue: 38(6)
Published: May 21, 2024
Abstract Marine protected areas (MPAs) globally serve conservation and fisheries management goals, generating positive effects in some marine ecosystems. Surf zones sandy beaches, critical ecotones bridging land sea, play a pivotal role the life cycles of numerous fish species as prime for subsistence recreational fishing. Despite their significance, these remain understudied when evaluating MPAs. We compared surf zone assemblages inside outside MPAs across 3 bioregions California (USA). Using seines baited remote underwater videos (BRUVs), we found differences one region. Inside south region MPAs, observed higher abundance (Tukey's honest significant difference [HSD] = 0.83, p 0.0001) richness (HSD 0.22, BRUVs greater biomass 0.32, 0.0002) seine surveys with reference sites. Selected live‐bearing, fished taxa were positively affected by Elasmobranchs displayed BRUV 0.35, 0.0003 HSD 0.23, 0.008, respectively). Although no overall MPA signal Embiotocidae, abundances juvenile large adult barred surfperch ( Amphistichus argenteus ), most abundant species, (K–S test D 0.19, < 0.0001). Influence habitat characteristics on performance indicated width was associated but negatively richness. The had largest effect size all metrics. Our findings underscored variability composition regions survey methods that significantly A comprehensive assessment should consider specific taxa, distribution, factors geography.
Language: Английский
Citations
6
Journal of Zoological Systematics & Evolutionary Research, Journal Year: 2023, Volume and Issue: 2023, P. 1 - 16
Published: March 20, 2023
The family Carcharhinidae includes the most typical and recognizable sharks, although its internal classification is subject of extensive debate. In particular, type genus, Carcharhinus Blainville, 1816, which also speciose, appears to be paraphyletic in relation a number morphologically distinct taxa. Isogomphodon oxyrhynchus (Valenciennes, 1839) (the daggernose shark) carcharinid, endemic limited area Western Atlantic between Trinidad Tobago Gulf Maranhão northern Brazil, one smallest ranges any New World elasmobranch species. recent decades, I. populations have been decimated by anthropogenic impacts, has led species as critically endangered IUCN. However, there considerable debate on both validity (I. oxyrhynchus) status Gill, 1862 entity from genus Carcharhinus. present study based molecular assessment genetic that combines mitochondrial nuclear markers, were used identify biogeographic events responsible for emergence dispersal Brazil. distance analyses phylogenetic trees confirmed paraphyly Carcharhinus, recovering clade comprising Carcharhinus+I. oxyrhynchus+Prionace glauca (Linnaeus, 1758). Our results indicate not only shark actually member but it genetically more closely related porosus (Ranzani, than other analyzed. Given this, P. are therefore reclassified recognized glaucus. shark, oxyrhynchus, diverged C. during Miocene, when significant geomorphological processes occurred coast South America, particular configuration Amazon River. It associated with plume, distinctive morphological features represent autapomorphic ecological adaptations this unique habitat do reflect systematic distinction
Language: Английский
Citations
16
Marine Policy, Journal Year: 2024, Volume and Issue: 163, P. 106082 - 106082
Published: March 7, 2024
Sharks and rays are a relevant component of Fiji's small-scale fishery. However, existing data skewed towards sharks, leaving fishery activities for less understood. To document species-specific catch numbers, sex, age-classes captured rays, the Suva fish market on main island Viti Levu was surveyed one year from January 2022 to 2023. Among 192 individual recorded in Suva, five species were visually identified: maskray (Neotrygon sp.), spotted eagle ray (Aetobatus ocellatus), pink whipray (Pateobatis fai), Oceania fantail (Taeniura lessoni), porcupine (Urogymnus asperrimus). DNA barcoding did not provide unequivocal confirmation. The most traded species. further characterize capture relevance food security, 84 fishers vendors interviewed coastal communities at local markets. interviews revealed that 70.4% interviewees caught which 60% reported spear them. Rays considered moderately important resource but particularly security as substitute bony fish. Given life histories global declines many species, explicitly considering management arrangements fisheries enhancing compliance enforcement regulations, is vital safeguard populations. Overall, these findings baseline information monitoring
Language: Английский
Citations
5
Endangered Species Research, Journal Year: 2024, Volume and Issue: 54, P. 285 - 310
Published: May 14, 2024
Historical ecology draws on a broad range of information sources and methods to provide insight into ecological social change, especially over the past ∼12000 yr. While its results are often relevant conservation restoration, insights from diverse disciplines, environments, geographies have frequently remained siloed or underrepresented, restricting their full potential. Here, scholars practitioners working in marine, freshwater, terrestrial environments 6 continents various archipelagoes synthesize knowledge fields history, anthropology, paleontology, with goal describing global research priorities for historical influence conservation. We used structured decision-making process identify address questions 4 key priority areas: (1) concepts, (2) co-production community engagement, (3) policy management, (4) climate change impacts. This work highlights ways that has developed matured use novel sources, efforts move beyond extractive practices toward co-production, application management challenges including change. demonstrate this field brought together researchers across connected academics practitioners, engaged communities create apply our shared future.
Language: Английский
Citations
5
Biology, Journal Year: 2024, Volume and Issue: 13(2), P. 73 - 73
Published: Jan. 26, 2024
Over recent decades, elasmobranchs (sharks, rays, and skates) have been increasingly recognized among the world’s most threatened marine wildlife, leading to heightened scientific attention. However, batoids (rays are relatively understudied, especially in Large Ocean States of Pacific. This synthesis compiles insights on batoid diversity occurrence Fiji’s waters by integrating a literature review, participatory science programs such as Great Fiji Shark Count (GFSC) Initiative, Projects Abroad (PA), Manta Project (MPF), iNaturalist, along with environmental DNA. Nineteen species from seven families were identified: 19 literature, 12 programs, six eDNA analysis. Notably, this study provides first photographic evidence for bentfin devil ray (Mobula thurstoni, Lloyd, 1908) Fiji. GFSC data indicated highest Western Division, spotted eagle rays (Aetobatus ocellatus, Kuhl, 1823) maskrays (Neotrygon sp.) being observed most. In-person interviews conducted PA provided information wedgefishes potentially sawfishes. MPF records iNaturalist uploads dominated reef manta (M. alfredi, Krefft, 1868), while pink whipray (Pateobatis fai, Jordan Seale, 1906) yielded DNA sequences. Overall, 68.4% face an elevated extinction risk based International Union Conservation Nature Red List criteria. Although caution is warranted older literature-based giant guitarfish (Glaucostegus typus, Anonymous [Bennett], 1830), stingaree (Plesiobatis daviesi, Wallace, 1967), lack sawfish verification, highlights effectiveness combined methodological approach establishing reference point understudied taxon
Language: Английский
Citations
4
Marine Policy, Journal Year: 2024, Volume and Issue: 163, P. 106117 - 106117
Published: April 10, 2024
Bycatch in fisheries is a key threat to non-target marine species, particularly for those species that have life histories with low productivity or poor conservation status. In this paper, the requirements of new Marine Stewardship Council (MSC) Fisheries Standard (hereafter "the Standard") are summarised relevant Endangered, Threatened and Protected (ETP) species. This covers both how designated as ETP, performance management assessed respect ETP when scoring against Standard. The process used select these described, including review earlier versions assessment reports selection achieved MSC certification. identified lack consistency implementation guidelines, which was part due clarity revised has been designed achieve more consistent impacts on align closely global best practice. may be template managers seeking prioritise bycatch improved setting specific measurable objectives relation population status minimising mortalities.
Language: Английский
Citations
4
Marine Policy, Journal Year: 2025, Volume and Issue: 176, P. 106637 - 106637
Published: Feb. 22, 2025
Language: Английский
Citations
0
Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12
Published: March 25, 2025
Language: Английский
Citations
0
Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12
Published: April 14, 2025
For highly mobile marine species such as pelagic elasmobranchs, the development of effective spatial management requires a comprehensive understanding movement ecology. Research incorporating data across seasons and life stages, including reproductive states, is valuable for informing management, yet absent most species. In Northwest (NW) Atlantic Ocean (hereafter referred to NW Atlantic), porbeagle shark Lamna nasus that overfished, has live retention ban (Canada) or landings regulations (United States), also commonly captured incidentally bycatch. on spatiotemporal dynamics habitat use limited, with all previous research utilizing pop-off satellite archival tags are prone large uncertainty in location estimates. This study used higher-accuracy fin-mount identify patterns stages sharks tagged off northeastern coast United States. During summer fall, 95% kernel density estimate (referred “activity space”) porbeagles occurred almost exclusively continental shelf Gulf Maine Georges Bank. Activity space expanded shifted southwards include offshore environments during winter spring juveniles, mature non-gravid females, females unknown while activity males gravid remained waters year-round. finding differs from assumption southward migrations linked reproduction porbeagles. Tagged were found have relatively small 50% “high occupancy area”) located around Cape Cod, Massachusetts was well-conserved seasons. static, high area implications population’s conservation given amount fishing (rod-and-reel, trawl, gillnet) occurring within this region. Given overlap between activity, well recapture rate (10.5%), coastal should be considered porbeagle.
Language: Английский
Citations
0