Geographic and ontogenetic variation in the diet of two commonly exploited batoids (Chilean eagle ray and Pacific guitarfish) off Peru: evidence of trophic plasticity

González-Pestana, Adriana; Silva-Garay, Lorena; Quiñónes, Javier; Mayaute, Luis; Manrique, Massiel; Segura‐Cobeña, Eduardo; Espinoza, Pepe; Moscoso, Víctor Chama; Vélez‐Zuazo, Ximena; Alfaro‐Shigueto, Joanna; Mangel, Jeffrey C.

doi:10.1007/s10641-021-01157-w

Cited by 5 publications

(1 citation statement)

References 58 publications

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“…The ensemble or conditional random forest was also fitted using the partykit package for R (Hothorn & Zeileis, 2015). Machine learning‐based recursive partitioning procedures are increasing used in ecological and fisheries settings to understand risk factors and screen for potential predictors of subgroup membership (Gonzalez‐Pestana et al, 2021; Pfaller et al, 2018; Zentner et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

Global governance guard rails for sharks: Progress towards implementing the United Nations international plan of action

Gilman,

Chaloupka,

Taylor

et al. 2023

Fish and Fisheries

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There is growing concern over the conservation status of sharks and relatives exposed to fishing mortality. The Food and Agriculture Organization of the United Nations in 1999 adopted the International Plan of Action for the Conservation and Management of Sharks (IPOA), which provides nations with advice on adopting and implementing national plans. An assessment of global national and regional plans of action on sharks (NPOAs) found that: most are out of date; limited use of specific, measurable and timebound objectives and activities; no outcome objectives; and few performance assessments. This makes most NPOAs inadequate for planning and assessing efficacy. Over 33% of the annual retained catch of sharks and relatives was from countries without NPOAs and less than 12% was from countries with current NPOAs. NPOAs identified fisheries management framework deficits, ecology knowledge gaps, institutional capacity and coordination shortfalls, and budget constraints as the largest obstacles to implementation and are improvement priorities. We recommend how to amend the IPOA to better support the adoption and effective design and implementation of NPOAs for evidence‐informed conservation and management.

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Section: Methodsmentioning

confidence: 99%

Global governance guard rails for sharks: Progress towards implementing the United Nations international plan of action

Gilman,

Chaloupka,

Taylor

et al. 2023

Fish and Fisheries

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A tangled web: global review of fishing interactions with rhino rays

Pytka,

Kyne,

Carlson

et al. 2023

Rev Fish Biol Fisheries

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Rhino rays (Order Rhinopristiformes) are one of the most threatened vertebrate groups. Despite overfishing being recognised as the greatest threat to this group, a comprehensive assessment of the fisheries and types of fishing gear that rhino rays interact with is lacking. We reviewed published and grey literature (n = 116 references) to evaluate interactions between rhino rays and fisheries, determine gear types most responsible for their capture, and species for which most interactions occur by region. Interactions (n = 420) were reported from 37 of 88 range states, for 52 of 68 known species. Combined, 59% of the literature reported interactions from trawlers and gillnets. Wedgefishes (Rhinidae) were the most reported family (29%) and bowmouth guitarfish (Rhina ancylostomus) the most reported species (9.5%). Asia accounted for half of interactions (n = 211), with 67% of the literature from unspecified gear (e.g., mixed landings), masking gear-specific interactions. Data quality was variable, with the highest resolution in countries with lower species diversity and where species are least imperiled (e.g., Australia). Discard mortality and physiological effects of capture are poorly known with data available for 25% of species (almost exclusively from Australia and the Americas). While additional data are urgently required to quantify the true extent of rhino ray catch globally, reducing fisheries mortality is a priority and key to address declining populations. Recommendations include prioritizing spatial management in critical habitats (e.g., nursery areas), expansion in the use of proven bycatch reduction devices, encouraging safe release and handling, and addressing drivers of retention and trade.

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Understanding the Trophic Ecology at Different Temporal Scales of the Pelagic Stingray (Pteroplatytrygon Violacea) in the Western Mediterranean Sea

Vigo,

Barría,

Nadal

et al. 2024

Preprint

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Geographic and ontogenetic variation in the diet of two commonly exploited batoids (Chilean eagle ray and Pacific guitarfish) off Peru: evidence of trophic plasticity

Cited by 5 publications

References 58 publications

Global governance guard rails for sharks: Progress towards implementing the United Nations international plan of action

Global governance guard rails for sharks: Progress towards implementing the United Nations international plan of action

A tangled web: global review of fishing interactions with rhino rays

Understanding the Trophic Ecology at Different Temporal Scales of the Pelagic Stingray (Pteroplatytrygon Violacea) in the Western Mediterranean Sea

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