Climate vulnerability assessment of key fishery resources in the Northern Humboldt Current System

Abstract

The Northern Humboldt Current System sustains one of the most productive fisheries in the world. However, climate change is anticipated to negatively affect fish production in this region over the next few decades, and detailed analyses for many fishery resources are unavailable. We implemented a trait-based Climate Vulnerability Assessment based on expert elicitation to estimate the relative vulnerability of 28 fishery resources (benthic, demersal, and pelagic) to the impacts of climate change by 2055; ten exposure factors (e.g., temperature, salinity, pH, chlorophyll) and 13 sensitivity attributes (biological and population-level traits) were used. Nearly 36% of the species assessed had “high” or “very high” vulnerability. Benthic species were ranked the most vulnerable (gastropod and bivalve species). The pelagic group was the second most vulnerable; the Pacific chub mackerel and the yellowfin tuna were amongst the most vulnerable pelagic species. The demersal group had the relatively lowest vulnerability. This study allowed identification of vulnerable fishery resources, research and monitoring priorities, and identification of the key exposure factors and sensitivity attributes which are driving that vulnerability. Our findings can help fishery managers incorporate climate change into harvest level and allocation decisions, and assist stakeholders plan for and adapt to a changing future.

Biodiversity and distribution of sea anemones (Cnidaria, Anthozoa, Actiniaria) in Peru

“…Spatially-near findings indicate that local soft-bottom benthic communities are highly adapted to reduced conditions but it is unclear the ecological threshold of these responses over time (Aramayo et al ., 2021). In fact, future scenarios of climate change for the Peruvian sea highlight that even commercially important benthic species are more threatened than others in this complex marine ecosystem (Ramos et al ., 2022), consequently producing more uncertainty in other poorly-studied species living in this habitat.…”

Variación de la captura por unidad de esfuerzo (CPUE) de la pesca artesanal y su sustentabilidad en relación con las variables ambientales en el Pacífico colombiano

“…En la bahía de Tumaco, la mayor CPUE total con trasmallo se presentó en la época de lluvia y en áreas con alta turbidez del agua. Durante esta época, y en esta parte de la bahía, se puede presentar un efecto leve del fenómeno de surgencia de la corriente de Humboldt, la cual puede proveer de nutrientes el agua para el incremento en las capturas (Ramos et al, 2022). En contraste, en el área estuarina, durante la época de lluvia, las capturas con trasmallo fueron más bajas debido a que el efecto de surgencia puede que no alcance esta zona y, por lo tanto, sólo estarían especies residentes estuarinas de bajo interés comercial y menores tallas (Molina et al, 2020), lo cual disminuiría el rendimiento pesquero, pero incrementaría el descarte.…”

On the Estimation of the Interannual Variability of the Ocean Surface Temperature in the Area of the Peruvian Upwelling

“…The PU is formed by the cold Peruvian Current, which comes from southern Chile and flows northward the equator. As a result of the wind blowing in the direction of the equator, the Coriolis force in the trade wind deflects the current to the west [Karstensen and Ulloa, 2009;Ramos et al, 2022].…”

“…Therefore, the purpose of this article is to study the variability of sea water temperature because it has an important impact on the vital activity of marine organisms. Temperature changes can manifest itself in an explicit and indirect form since it can accelerate or slow down growth, and even lead to mass death during sudden temperature changes [Bohle-Carbonell, 1989;Malinin, 2002;Penven et al, 2005;Ramos et al, 2022;Zavala et al, 2019].…”

“…[Bakun, 1996;Bakun and Weeks, 2008;Bakun et al, 2010Bakun et al, , 2015Bertrand et al, 2004] hypothesized that an increase in greenhouse gases will result in considerable changes in land-sea pressure gradients, which would affect global wind patterns and in the natural state, would eventually increase the upwelling pressure in the oceans. Then, in the case of developing a predictive ocean temperature model, it would be possible to determine fish landings to a certain extent [Castillo et al, 2021;Massing et al, 2022;Penven et al, 2005;Ramos et al, 2022;Swartzman et al, 2008;Zavala et al, 2019].…”