npj Ocean Sustainability, Journal Year: 2025, Volume and Issue: 4(1)
Published: May 16, 2025
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
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
8
Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12
Published: March 25, 2025
Language: Английский
Citations
1
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
17
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
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
Ecological Informatics, Journal Year: 2022, Volume and Issue: 69, P. 101673 - 101673
Published: May 16, 2022
Language: Английский
Citations
17
Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10
Published: Feb. 24, 2023
The present study, based on microsatellite markers, describes a population genetic analysis of the small-spotted catshark Scyliorhinus canicula (Linnaeus, 1758), representing one most abundant and commonly caught cartilaginous fishes in Mediterranean Sea adjacent areas. analyses were performed to unravel features (variability, connectivity, sex-biased dispersal) their relative geographic populations, both at small (around coast Sardinia, Western Sea) larger spatial scale (pan-Mediterranean level between Atlantic Ocean Sea). Individual clustering, multivariate variance rejected hypothesis homogeneity, with significant differences mainly within Eastern basins, as well NE Ocean. In detail, our results seem confirm that Strait Gibraltar could not represent complete barrier exchange individuals Sea. latter area, complex structuring for S. was found. Apart from among Western, Adriatic sites, basin catsharks around Sardinian waters are strongly differentiated all others (both eastern Tyrrhenian southernmost part Algerian basin) demographically stable. Several possible mechanisms, biological abiotic (e.g., migratory behavior, waterfronts, oceanographic discontinuities), discussed here explain peculiar characteristics. Overall, data presented, local regional level, baseline information, useful temporal monitoring assess effects or future fishing/management/conservation measures.
Language: Английский
Citations
11
Marine Policy, Journal Year: 2023, Volume and Issue: 150, P. 105522 - 105522
Published: Feb. 7, 2023
Fisheries bycatch is the foremost threat to conservation of many marine species. Evaluation alternative management strategies can account for relative strength evidence, contribution achieving objectives, costs commercial viability, likelihood compliance and tradeoffs from multispecies conflicts. This study describes benefits limitations a complementary approach applying sequential mitigation hierarchy develop evidence-informed policy. Measures that avoid are considered before those minimize catch risk. These then followed by remediation interventions reduce fishing mortality sublethal impacts. Finally, direct, compensatory banking or in lieu fee-based offsets residual impacts were not possible avoid, remediate be implemented as last resort. However, offset activities socioeconomically unjust, some irreversible cannot offset. Air-breathing exposed wide range anthropogenic hazards across ontogenetic stages, presenting more options than fishes. Averted loss offsets, which foregone losses predicted occur had an intervention occurred, combination with true achieve at least equivalent gain contribute meeting broad, population- species-level objectives. Robust metrics needed determine equivalency, such reproductive value population between in-kind versus out-of-kind on-site offsite offsets. Bycatch guided promise ecological socioeconomic including going bycatch-neutral bycatch-negative through net biodiversity gain.
Language: Английский
Citations
10
Ecological Indicators, Journal Year: 2023, Volume and Issue: 154, P. 110720 - 110720
Published: July 30, 2023
Unprecedented levels of change in ocean ecosystems bring an ever-increasing need for re-analyses existing data to explore pressing conservation questions. Substantial declines white shark (Carcharodon carcharias) presence at two primary aggregation sites have raised concerns about the species' status throughout South Africa. Using most comprehensive suite abundance indices compiled date, we evaluated temporal trends and strength evidence regional redistribution. Individual from all Africa were highly variable. The overall trend a log-linear Generalized Additive Model was relatively flat, indicating largely unchanged since protection 1991. However, reports human-shark incidents showed general shift Western Eastern Cape. Correlations among individual demonstrated that movements not as simple animals leaving one site inhabit another. Further research is needed effect movement on monitoring data. Our results reaffirm better standardization collection methods generate develop long-term programs Ideally, environmental or operational factors affecting should also be explored future assessments level. provide baseline work, directing understand drivers localized changes focusing management reducing anthropogenic sources mortality within their Southwest Indian Ocean range.
Language: Английский
Citations
10