Impact of ocean warming on the early ontogeny of cephalopods: a metabolic approach

Pimentel, Marta S.; Trübenbach, Katja; Faleiro, Filipa; Boavida-Portugal, Joana; Repolho, Tiago; Rosa, Rui

doi:10.1007/s00227-012-1991-9

Cited by 46 publications

(39 citation statements)

References 49 publications

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“…Yet, here we show that the metabolic increment typically observed during the transition from an encapsulated embryo to a jet propelled planktonic stage under normocapnia (Pimentel et al, 2012;Rosa et al, 2012b) no longer occurred under hypercapnia (Fig. 3A).…”

Section: Discussionmentioning

confidence: 62%

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Rosa

Trübenbach

Pimentel

et al. 2014

Journal of Experimental Biology

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Little is known about the capacity of early life stages to undergo hypercapnic and thermal acclimation under the future scenarios of ocean acidification and warming. Here, we investigated a comprehensive set of biological responses to these climate changerelated variables (2°C above winter and summer average spawning temperatures and ΔpH=0.5 units) during the early ontogeny of the squid Loligo vulgaris. Embryo survival rates ranged from 92% to 96% under present-day temperature (13-17°C) and pH (8.0) scenarios. Yet, ocean acidification (pH 7.5) and summer warming (19°C) led to a significant drop in the survival rates of summer embryos (47%, P<0.05). The embryonic period was shortened by increasing temperature in both pH treatments (P<0.05). Embryo growth rates increased significantly with temperature under present-day scenarios, but there was a significant trend reversal under future summer warming conditions (P<0.05). Besides pronounced premature hatching, a higher percentage of abnormalities was found in summer embryos exposed to future warming and lower pH (P<0.05). Under the hypercapnic scenario, oxygen consumption rates decreased significantly in late embryos and newly hatched paralarvae, especially in the summer period (P<0.05). Concomitantly, there was a significant enhancement of the heat shock response (HSP70/HSC70) with warming in both pH treatments and developmental stages. Upper thermal tolerance limits were positively influenced by acclimation temperature, and such thresholds were significantly higher in late embryos than in hatchlings under present-day conditions (P<0.05). In contrast, the upper thermal tolerance limits under hypercapnia were higher in hatchlings than in embryos. Thus, we show that the stressful abiotic conditions inside the embryo's capsules will be exacerbated under near-future ocean acidification and summer warming scenarios. The occurrence of prolonged embryogenesis along with lowered thermal tolerance limits under such conditions is expected to negatively affect the survival success of squid early life stages during the summer spawning period, but not winter spawning.

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Section: Discussionmentioning

confidence: 62%

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Rosa

Trübenbach

Pimentel

et al. 2014

Journal of Experimental Biology

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“…To date, paralarvae of jumbo squid have not been found in waters north of the U.S.-Mexico border [40], and laboratory experiments have confirmed that eggs can successfully develop only at water temperatures between 15°C and 25°C [41]. Because larvae and small sized-squid have a lower thermal tolerance than large squid [42], we hypothesize that wider distribution for spawning eggs and higher success in egg development during anomalously high temperature events (e.g., El Niño events), coupled with migration of smaller squid, promote range expansions of D. gigas . Under this scenario, small-sized squid migrate toward the NCCS to feed actively, as shown by stomach content analysis [13], grow until they mature, and likely return to warmer waters to spawn multiple times in regions that include coastal and offshore Mexican waters along the Baja California peninsula, and possibly the edge of NPSG.…”

Section: Resultsmentioning

confidence: 99%

Range Expansion of the Jumbo Squid in the NE Pacific: δ15N Decrypts Multiple Origins, Migration and Habitat Use

2013

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Coincident with climate shifts and anthropogenic perturbations, the highly voracious jumbo squid Dosidicus gigas reached unprecedented northern latitudes along the NE Pacific margin post 1997–98. The physical or biological drivers of this expansion, as well as its ecological consequences remain unknown. Here, novel analysis from both bulk tissues and individual amino acids (Phenylalanine; Phe and Glutamic acid; Glu) in both gladii and muscle of D. gigas captured in the Northern California Current System (NCCS) documents for the first time multiple geographic origins and migration. Phe δ15N values, a proxy for habitat baseline δ15N values, confirm at least three different geographic origins that were initially detected by highly variable bulk δ15N values in gladii for squid at small sizes (<30 cm gladii length). In contrast, bulk δ15N values from gladii of large squid (>60 cm) converged, indicating feeding in a common ecosystem. The strong latitudinal gradient in Phe δ15N values from composite muscle samples further confirmed residency at a point in time for large squid in the NCCS. These results contrast with previous ideas, and indicate that small squid are highly migratory, move into the NCCS from two or more distinct geographic origins, and use this ecosystem mainly for feeding. These results represent the first direct information on the origins, immigration and habitat use of this key “invasive” predator in the NCCS, with wide implications for understanding both the mechanisms of periodic D. gigas population range expansions, and effects on ecosystem trophic structure.

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“…In fact, the predictable rapid rate of climate change will induce thermal stress to coastal marine biota as their thermal tolerance limits are reached or even exceeded. Beyond a certain thermal limit, biological processes such as metabolism, growth, feeding, reproduction and behavior may be affected (Carmona-Osalde et al, 2004;Pörtner and Knust, 2007;Nilsson et al, 2009;Byrne, 2011;Pimentel et al, 2012;Rosa et al, 2012), thus compromising the overall fitness and survival of species.…”

Section: Introductionmentioning

confidence: 99%

Defective skeletogenesis and oversized otoliths in fish early stages in a changing ocean

Pimentel

Faleiro

Dionísio

et al. 2014

Journal of Experimental Biology

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Early life stages of many marine organisms are being challenged by rising seawater temperature and CO 2 concentrations, but their physiological responses to these environmental changes still remain unclear. In the present study, we show that future predictions of ocean warming (+4°C) and acidification (ΔpH=0.5 units) may compromise the development of early life stages of a highly commercial teleost fish, Solea senegalensis. Exposure to future conditions caused a decline in hatching success and larval survival. Growth, metabolic rates and thermal tolerance increased with temperature but decreased under acidified conditions. Hypercapnia and warming amplified the incidence of deformities by 31.5% (including severe deformities such as lordosis, scoliosis and kyphosis), while promoting the occurrence of oversized otoliths (109.3% increase). Smaller larvae with greater skeletal deformities and larger otoliths may face major ecophysiological challenges, which might potentiate substantial declines in adult fish populations, putting in jeopardy the species' fitness under a changing ocean.

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Impact of ocean warming on the early ontogeny of cephalopods: a metabolic approach

Cited by 46 publications

References 49 publications

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Differential impacts of ocean acidification and warming on winter and summer progeny of a coastal squid (Loligo vulgaris)

Range Expansion of the Jumbo Squid in the NE Pacific: δ15N Decrypts Multiple Origins, Migration and Habitat Use

Defective skeletogenesis and oversized otoliths in fish early stages in a changing ocean

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