Predictive habitat suitability models to aid the conservation of elasmobranchs in Isla del Coco National Park (Costa Rica)

González-Andrés, Cristina; Sánchez-Lizaso, José Luís; Cortés, Jorge; Pennino, María Grazia

doi:10.1016/j.jmarsys.2021.103643

Cited by 7 publications

(3 citation statements)

References 65 publications

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“…Stations on the northern shores of the SoM, located in close proximity to human settlements, industrial areas, or heavily trafficked zones might exhibit lower species diversity due to heightened anthropogenic pressures on the marine environment. Differences in abundance between stations might be indicative of distinct ecological niches present at each location (González‐Andrés et al, 2021). Sharks and rays are sensitive to environmental factors such as water temperature, salinity, and depth.…”

Section: Discussionmentioning

confidence: 99%

Distribution and diversity of elasmobranchs in the Sea of Marmara: A 2023 status report

Karadurmuş,

Sarı

2024

Aquatic Conservation

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Elasmobranchs, encompassing an array of sharks and rays, confront a threat of extinction on a global scale. The Sea of Marmara (SoM) stands out as a critical refuge for these endangered species. This study harnesses data derived from comprehensive trawl surveys, representing the first area‐based evaluation of the elasmobranchs inhabiting the SoM. Sampling protocols were carried out at 10 separate stations along the 980‐km coastline of the SoM, each bounded by different ecological characteristics and anthropogenic influences. A total of eight shark species and six ray species were caught in the towed area of the entire the SoM. Notably, Scyliorhinus canicula and near‐threatened Raja clavata constitute more than 50% of the total abundance. Additionally, rare, and critically endangered species, including the Oxynotus centrina, Squatina squatina, Dipturus batis, and Myliobatis aquila, were documented, expanding our knowledge of their presence in the region. Spatial distribution heterogeneity was pronounced within species. Size distributions were species‐specific, and the presence of both juvenile and adult individuals suggested successful reproduction and growth. Records expand the known size range in the SoM for six shark and three ray species. It also provides first‐size information based on the total length of the S. stellaris and D. batis. Additionally, the urgent need for field‐based conservation efforts is highlighted, citing a previously unidentified important sensitive areas located in the southern part of the SoM.

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Section: Discussionmentioning

confidence: 99%

Distribution and diversity of elasmobranchs in the Sea of Marmara: A 2023 status report

Karadurmuş,

Sarı

2024

Aquatic Conservation

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“…Many studies have widely demonstrated the relationship between the primary productivity and fisheries catch (Pauly and Christensen, 1995;Watson et al, 2014), and primary productivity variability is significantly and positively correlated to the mean trophic level of catches (Conti and Scardi, 2010); therefore, the primary productivity is used in most SDMs (Gonzalez-Pestana et al, 2020;Chan et al, 2021). Other environmental variables like depth, dissolved oxygen, salinity, and offshore distance are often used in the study of marine shark distribution (Sequeira et al, 2014;Meyers et al, 2017;Chan et al, 2021;Pottie et al, 2021;Gonzaĺez-Andreś et al, 2021). In the present study, eight environmental variables including SST, salinity, depth, distance from land, current velocity, primary productivity, dissolved oxygen concentration, and pH were selected as the model predictors.…”

Section: Data Sources and Preparationmentioning

confidence: 98%

Setting Conservation Priorities for Marine Sharks in China and the Association of Southeast Asian Nations (ASEAN) Seas: What Are the Benefits of a 30% Conservation Target?

Ding

et al. 2022

Front. Mar. Sci.

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Sharks play an important role in marine ecosystems as top predators and have been increasingly accepted in recent years as a group for priority conservation worldwide. However, as one of the regions with the highest marine shark species richness, there is still a limited understanding of shark diversity patterns and conservation needs in China and the Association of Southeast Asian Nations (ASEAN) seas. In this study, we applied an ensemble species distribution model of five algorithms to investigate the diversity distribution patterns of 149 shark species in China and the ASEAN seas for the first time. A systematic conservation planning approach involving diversity, scarcity, and biogeographical distinctiveness was used to identify and compare conservation priority settings. Our results showed that bathymetry and dissolved oxygen were the most important variables contributing to shark distribution. The distribution pattern of shark species richness peaked on the continental shelves at 22–26°N, and a hotspot of shark diversity was identified around the Taiwan Strait. The spatial distribution of shark species in the nine orders and the 72 threatened shark species varied considerably. The existing marine protected area network only protects 2.1% of the ocean, 32.9% of the shark species, and 43.1% of the threatened species, highlighting a substantial conservation gap. Among the conservation priorities identified, the high conservation target scenario (30%) protects only 10%–15% more species than the low conservation target scenario (10%). However, under the high conservation target scenario, the conservation range of species tripled. Our results show that low conservation targets were only suitable for addressing the number of protected species, and that high targets would bring about improved outcomes for the number of protected species and the protected range of threatened species. Furthermore, planned priorities with a large clump pattern had slightly higher conservation achievements than those with small clumps. The results of this study will contribute to the development of a priority area network for sharks and provide a scientific basis for shark conservation and management in the China and ASEAN seas.

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“…Species distribution models of large pelagic fishes have been extensively used to predict suitable areas 29 , identify hotspots 1 , 30 , and assess the potential impacts of climate change 31 and of anthropogenic events such as oil spills 30 , 32 or fishing mortality 13 , 19 . We implemented mixed-effects Bayesian spatial models with an integrated nested Laplace approximation (INLA) 33 , which has demonstrated to be a great alternative for modeling species distributions and environmental preferences 1 , 34 , giving results in terms of posterior probability distributions instead of fixed values, and incorporating several types of random effects of both spatial and temporal nature, with reduced computational times 35 , 36 .…”

Section: Introductionmentioning

confidence: 99%

Mesoscale activity drives the habitat suitability of yellowfin tuna in the Gulf of Mexico

Ramírez-Mendoza,

Sosa-Nishizaki,

Pardo

et al. 2024

Sci Rep

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Yellowfin tuna, Thunnus albacares, represents an important component of commercial and recreational fisheries in the Gulf of Mexico (GoM). We investigated the influence of environmental conditions on the spatiotemporal distribution of yellowfin tuna using fisheries’ catch data spanning 2012–2019 within Mexican waters. We implemented hierarchical Bayesian regression models with spatial and temporal random effects and fixed effects of several environmental covariates to predict habitat suitability (HS) for the species. The best model included spatial and interannual anomalies of the absolute dynamic topography of the ocean surface (ADTSA and ADTIA, respectively), bottom depth, and a seasonal cyclical random effect. High catches occurred mainly towards anticyclonic features at bottom depths > 1000 m. The spatial extent of HS was higher in years with positive ADTIA, which implies more anticyclonic activity. The highest values of HS (> 0.7) generally occurred at positive ADTSA in oceanic waters of the central and northern GoM. However, high HS values (> 0.6) were observed in the southern GoM, in waters with cyclonic activity during summer. Our results highlight the importance of mesoscale features for the spatiotemporal distribution of yellowfin tunas and could help to develop dynamic fisheries management strategies in Mexico and the U.S. for this valuable resource.

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Predictive habitat suitability models to aid the conservation of elasmobranchs in Isla del Coco National Park (Costa Rica)

Cited by 7 publications

References 65 publications

Distribution and diversity of elasmobranchs in the Sea of Marmara: A 2023 status report

Distribution and diversity of elasmobranchs in the Sea of Marmara: A 2023 status report

Setting Conservation Priorities for Marine Sharks in China and the Association of Southeast Asian Nations (ASEAN) Seas: What Are the Benefits of a 30% Conservation Target?

Mesoscale activity drives the habitat suitability of yellowfin tuna in the Gulf of Mexico

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