Article
Fisheries
Alexandre Assemat, Sylvain Adnet, Kani Bayez, Auguste Hassler, Florent Arnaud-Godet, Frederik H. Mollen, Catherine Girard, Jeremy E. Martin
Summary: This study examines the diet and ecological characteristics of sharks through the analysis of stable isotopes and elemental ratios in tooth enamel. Preliminary results suggest that diet shifts in sharks are influenced by individual development and spatial distribution, and the elemental ratios measured in one species also reveal sexual differences.
JOURNAL OF FISH BIOLOGY
(2022)
Review
Environmental Studies
Anna R. Oposa, Erika J. Techera
Summary: Sharks, dating back over 400 million years, are facing significant population declines due to increased fishing pressure and demand for their products. This paper aims to outline the legal frameworks in the Philippines for shark management and conservation, highlighting the need for comprehensive national legislation and global regulation of shark trade. While a national legal framework alone cannot solve all the issues, it can provide a foundation for conservation, research, governance, and communication initiatives.
Article
Geology
Sylvain Adnet, Vincent Charpentier
Summary: This article describes a new assemblage of elasmobranchs discovered in the Sharbithat region of eastern Oman. The collection includes isolated dental fossils and shows affinities to other early Miocene elasmobranch-bearing sites worldwide. The study of this fossil assemblage improves our understanding of ancient elasmobranchs in the eastern Arabian coastline during the closure of the Neotethys and the formation of the Arabian Sea.
Article
Biodiversity Conservation
Fernando Tuya, Fatima Perez-Neira, Fernando Espino, Nestor E. Bosch, Eva K. M. Meyers, David Jimenez-Alvarado, Jose J. Castro, Ana Sobral, Francisco Otero-Ferrer, Ricardo Haroun
Summary: Elasmobranchs, such as sharks, rays, and skates, have experienced severe population declines globally, especially in the Northeastern Atlantic. However, there is a lack of ecological knowledge, particularly regarding abundance, in this region, which hinders effective conservation and management efforts. This study collected fish survey data from coastal areas across the Northeastern Atlantic and found that the eastern Atlantic oceanic archipelagos had higher species richness and abundance of elasmobranchs compared to other ecoregions. The study suggests prioritizing conservation efforts in these areas and establishing systematic monitoring programs to protect these vulnerable taxa.
GLOBAL ECOLOGY AND CONSERVATION
(2022)
Article
Environmental Sciences
Luis M. F. Alves, Ariana B. Moutinho, Luis J. Gomez, Ana L. Oropesa, Juan Munoz-Arnanz, Begona Jimenez, Marco F. L. Lemos, Vanessa F. Fonseca, Henrique Cabral, Sara C. Novais
Summary: This study aimed to determine if differences in contaminant body burden found in blue sharks from the Northeast Atlantic would result in differences in stress responses. The researchers found that sharks from the most contaminated zone exhibited more pronounced stress responses and similar differences were found in biomarker responses. These results suggest that blue sharks and these biomarkers have the potential to be used for pollution monitoring in different areas of the Atlantic.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Studies
Zoya Tyabji, Rima W. Jabado, Dipani Sutaria
Summary: Overfishing is the most pervasive threat to sharks and rays worldwide. This study conducted interviews with fishers and traders in the Andaman Islands to assess the utilization and trade of sharks and rays. The study found that sharks and rays were exported for the meat market and international trade, while also serving as a protein source for local fishers. The results highlight the need to revise legal frameworks to consider conservation needs and impacts on local communities.
Article
Biochemical Research Methods
Fabian Jeanne, Benoit Bernay, Pascal Sourdaine
Summary: This study analyzed the proteomes of different stages of spermatogenesis in Scyliorhinus canicula and identified proteins related to RNA processing, chromosome-related processes, cilium organization, and cilium activity. Proteins involved in cellular stress, ubiquitin-dependent degradation, post-transcriptional regulation, and regulation of cellular homeostasis were also found. Additionally, the study highlighted the potential roles of some proteins in spermatogenesis that need further exploration and emphasized the evolutionary context of spermatogenesis regulation.
JOURNAL OF PROTEOME RESEARCH
(2023)
Article
Environmental Sciences
J. H. Erasmus, N. J. Smit, R. Gerber, B. C. Schaeffner, N. Nkabi, V. Wepener
Summary: This study evaluated the total mercury concentrations in 22 species of elasmobranchs along the South African coastline. The results showed that the concentrations on the east coast were in the same range or higher compared to previous years, raising conservation concerns.
MARINE POLLUTION BULLETIN
(2022)
Article
Food Science & Technology
Xueao Ji, Xiaowei Yu, Qun Wu, Yan Xu
Summary: This study reveals the effect of initial microbial diversity on final metabolic diversity in Chinese sesame flavor-type liquor fermentation. Through experiments and simulated fermentation, it was found that initial fungal diversity positively impacts fungal succession, metabolic succession, and metabolic diversity.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Environmental Studies
Lydia Koehler, Ioannis Giovos, Jason Lowther
Summary: The study found limited integration and application of the precautionary principle for the conservation and management of elasmobranchs in Greece, Malta, and Cyprus. Potential applications of the precautionary principle for two model species were revealed, with 16 proposed measures ranging from basic to strong precautionary actions to aid in the conservation and management of these species.
Article
Geography, Physical
Jiachun Li, Zuoyu Sun, Gilles Cuny, Dayong Jiang
Summary: This paper presents a taxonomic study on the diverse chondrichthyan fauna from the Luolou Formation in South China. The study recognizes nine different taxa of sharks, indicating a high diversity and evenness in the shark palaeocommunity. The diverse morphologies of the sharks suggest adaptation to various feeding strategies.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Environmental Sciences
E. Fanelli, Z. Da Ros, I. Martino, E. Azzurro, G. Bargione, F. Donato, A. Lucchetti
Summary: The Mediterranean Sea, one of the three biodiversity hotspots, faces severe threats to elasmobranchs. This study focuses on the trophic ecology of the endemic Mediterranean ray, the starry ray Raja asterias, and concludes that the overexploitation of both mesopredators and their benthic prey disrupts the entire food webs in the Mediterranean.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Fisheries
Nathan Charles Bass, Joanna Day, Tristan L. Guttridge, Nathan A. Knott, Culum Brown
Summary: Limited information exists about the temporal residency patterns of marine predators, especially at the individual level. Temporal partitioning of resources can reduce intra-specific competition, but this has seldom been examined in predators in marine ecosystems. The study found that male and female Port Jackson sharks exhibited different residency patterns during their breeding season and showed a 24-h diel periodicity in their detection patterns. While most individuals were nocturnal, a small proportion of sharks were more frequently detected during the day, possibly to reduce competition for resources.
MARINE AND FRESHWATER RESEARCH
(2021)
Article
Business
Baris Istipliler, Jan-Philipp Ahrens, Suleika Bort, Andrew Isaak
Summary: This study investigates the impact of pre-succession family firm experience on firm performance by integrating arguments from psychology and managerial decision-making. The results show that although the main effect is negative, this relationship has important boundary conditions. Specifically, for non-family successors, the relationship between pre-succession family firm experience and firm performance follows an inverse U-shaped curve. Furthermore, the main negative relationship is stronger when the successors lack academic education or when the innovation impetus of the firm and industry is high.
JOURNAL OF BUSINESS RESEARCH
(2023)
Article
Fisheries
Romana Gracan, Bojan Lazar, Sara Zupan, Elena Buzan
Summary: The study assessed the genetic diversity of the spiny dogfish population in the Mediterranean Sea and highlighted its endangered status. The results indicate a unique genetic structure of spiny dogfish in the Adriatic Sea, suggesting the need for separate management and conservation efforts for this regionally exploited and endangered shark species.
MARINE AND FRESHWATER RESEARCH
(2021)