The Food of Albacore (Germo alalunga) off California and Baja California

McHugh, J. L.

doi:10.2307/1439746

Cited by 8 publications

(22 citation statements)

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“…McHugh (1952) collected 321 stomachs during the summers of 1949 and 1950 using unbaited poles (Fig. 1, based on McHugh Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Regions were designated northern (north of 44°N latitude, inclusive), central (between 33°and 44°N latitude) and southern (south of 33°N latitude, exclusive). The northern region lacks data from McHugh (1952) and Iversen (1962) and the southern region lacks data from Iversen (1962).…”

Section: Methodsmentioning

confidence: 99%

“…This was justified by the similarity in prey sizes described (see Discussion). For McHugh (1952), percent volume was used directly because numeric data were not reported.…”

Section: Methodsmentioning

confidence: 99%

“…Past studies (McHugh 1952, Iversen 1962, Pinkas et al 1971, Bernard et al 1985 have identified anchovy, but not sardine, in significant quantities in juvenile albacore diet. However, those studies were conducted during periods of high anchovy and low sardine abundance , Hill et al 2007.…”

Section: Introductionmentioning

confidence: 95%

“…Three notable studies (McHugh 1952, Iversen 1962 [in conjunction with Graham 1959], Pinkas et al 1971) are sufficient in scope for interdecadal comparisons. Data collected by Pinkas et al (1971), in particular, are widely used to parameterize ecosystem models (Kitchell et al 1999, Field et al 2006.…”

Section: Introductionmentioning

confidence: 99%

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Interdecadal variability in predator–prey interactions of juvenile North Pacific albacore in the California Current System

Glaser¹

2010

Mar. Ecol. Prog. Ser.

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Predator-prey interactions are critical components of multispecies models, and most attempts to quantify these interactions in pelagic marine environments rely on observational diet studies. In conjunction with 3 historical studies, a new diet study quantifies decadal patterns of predator-prey interactions for juvenile North Pacific albacore Thunnus alalunga in the California Current System (CCS). Juvenile albacore in the CCS eat young-of-year prey and derive 68 to 89% of nutrition from fishes, 9 to 30% from cephalopods, and the remainder from crustaceans. Despite resurgence in abundance of Pacific sardine Sardinops sagax in the CCS, only Northern anchovy Engraulis mordax, Pacific saury Cololabis saira, and cephalopods have consistently been important to albacore diet. These results support theoretical predictions of optimal foraging models that albacore will prefer hunting in cold, near-shore waters containing anchovy and saury while minimizing foraging in warmer, offshore waters of sardine habitat. A bioenergetics model is used to calculate daily and annual consumption rates. The importance of calculating an ensemble prey energy density (ED n ) value for steady-state consumption models is demonstrated, and the relationship between ED n and consumption rates is generalized to other marine predators. Low variability in ED n consumed by juvenile albacore translates into equally stable consumption to biomass (Q:B) ratios over decades.

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“…McHugh (1952) collected 321 stomachs during the summers of 1949 and 1950 using unbaited poles (Fig. 1, based on McHugh Fig.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…This was justified by the similarity in prey sizes described (see Discussion). For McHugh (1952), percent volume was used directly because numeric data were not reported.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interdecadal variability in predator–prey interactions of juvenile North Pacific albacore in the California Current System

Glaser¹

2010

Mar. Ecol. Prog. Ser.

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Through the stomach of a predator: Regional patterns of forage in the diet of albacore tuna in the California Current System and metrics needed for ecosystem-based management

Glaser

Waechter

Bransome

2015

Journal of Marine Systems

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Viewpoint: Back to the future for fisheries, where will we choose to go?

Zeller

Pauly

2019

Glob. Sustain.

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We present a view on global marine fisheries that emphasizes mitigating the conflict between sustainability and the scale of industrial exploitation driven by the demand of continuous economic growth. We then summarize the current state of global fisheries. Finally, we advocate strongly for scaling back industrial fisheries, most of which are non-sustainable. This can be achieved through eliminating the harmful, capacity-enhancing subsidies that prop up industrial fisheries to continue operating despite declining fish stocks. Instead, we propose to support well-managed, locally owned and operated small-scale fisheries, which generally contribute more to local employment and food security. We stress that contrary to deep-seated opinion in the fishing industry and among politicians, reducing overfishing by eliminating overcapacity in fishing fleets will actually lead to greater, not reduced catches. This would address part of the increased global seafood demand over the coming decades, which is driven by population and wealth growth. This seems counterintuitive, but is supported by fisheries science, data and experiences. Thankfully, we are beginning to see that some of these changes are being pursued by a growing number of countries and international institutions.

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The Food of Albacore (Germo alalunga) off California and Baja California

Cited by 8 publications

References 0 publications

Interdecadal variability in predator–prey interactions of juvenile North Pacific albacore in the California Current System

Interdecadal variability in predator–prey interactions of juvenile North Pacific albacore in the California Current System

Through the stomach of a predator: Regional patterns of forage in the diet of albacore tuna in the California Current System and metrics needed for ecosystem-based management

Viewpoint: Back to the future for fisheries, where will we choose to go?

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