Fish debris in sediments from the last 25 kyr in the Humboldt Current reveal the role of productivity and oxygen on small pelagic fishes

Abstract

Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site. in pelagic fish abundances have occurred in response to past large-scale climate changes than those observed in the instrumental period, which suggests that future climate change may result in substantial changes in ecosystem structure. Highlights ► Anchovy and other fishes fluctuated from multidecadal to millennial timescales. ► Productivity appears as the main factor controlling small pelagic fish abundance. ► Sub-surface oxygenation seems to play a role in a species-dependent way. ► The industrial fishery developed during a period of exceptional fish productivity.

Growing Into Poverty: Reconstructing Peruvian Small-Scale Fishing Effort Between 1950 and 2018

“…Nonetheless, statistically significant increases in both fleets' CPUE t and E t were registered between 1993 and 2006 (Table 4). These favorable conditions can perhaps be explained by the combined effect of: (i) a change in primary productivity and oceanographic conditions (e.g., a regime shift), potentially increasing the carrying capacity for multiple traditionally targeted coastal stocks (Ayón et al, 2011;Bertrand et al, 2011;Salvatteci et al, 2019); (ii) a segment of the fleet starting to venture further offshore (i.e., small-scale squid jiggers and longliners) targeting non-traditional, more abundant, stocks such as jumbo squid (Dosidicus gigas), mahi-mahi (Coryphaena hippurus), and pelagic oceanic sharks (e.g., Prionace glauca, Isurus oxyrinchus, and Alopias vulpinus) (Estrella and Swartzman, 2010;Mendo and Wosnitza-Mendo, 2014;Marín et al, 2017); and (iii) the implementation of Decreto Supremo No. 017-92-PE, a fisheries regulation that excludes industrial purse seiners and trawlers from the first five nautical miles off the coast, seeking to reduce industrial bycatch and habitat damage in areas known to be important for traditional small-scale fishery resources (SPDA, 2019).…”

Reconnecting with the past and anticipating the future: A review of fisheries‐derived cultural ecosystem services in pre‐Hispanic Peru

“…An increase in species diversity and individual fish sizes is registered on archaeological records when fishing nets started to be used (Béarez, 2000). However, the widespread use of cotton around 3,100–2,900 BCE contributed to advancing fisheries culture (Prieto, 2014). The production of cotton was particularly crucial for lighter and more resistant fishing nets, complemented with the cultivation and use of gourds for fishing floats (Dillehay, et al ,…”

“…The development of cotton nets—and the food surpluses they enabled—led to labour specialization (Prieto, 2014; Shady, 2002). Fishers invested most of their time fishing, increasing their dependence on inland farmers for cotton and gourds—the raw materials for elaborating their fishing gear (Rostworowski, 1970, 2005).…”

“…Marine‐themed myths and rituals denote the importance of the ocean for spiritual purposes in Peruvian coastal societies (Prieto, 2014; Rostworowski, 2005). Some examples of these include: Mullu : The spiny oysters Spondylus calcifer and Spondylus princeps , or ‘ Mullu ’ in Quechua, were one of the most valuable possessions during pre‐Hispanic times and even during the beginning of colonial times (Bauer, 2007; Rostworowski, 1970; Figure 4).…”

“… Sharks : Considered marine deities in multiple sites and cultures along the Peruvian coast. In Huaca Pucllana is where the best example of their ‘sacredness’ can be found (200–700 CE; Altamirano‐Sierra & Vargas‐Nalvarte, 2014; Prieto, 2014). Here shark meat consumption was limited for festive banquets associated with human sacrifices (Altamirano‐Sierra & Vargas‐Nalvarte, 2014; Apolín & Vargas‐Nalvarte, 2006).…”