The diet of white-spotted greenling Hexagrammos stelleri (Hexagrammidae) on the West Kamchatka shelf

Napazakov, V. V.

doi:10.1134/s0032945210010121

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Piscivory can be a major component of the diet of other greenlings. Fish consumption by the masked greenling Hexagrammos octogrammus was over 33% by weight for fish age 3 and older in the summer months (Pushchina and Antonenko 1999), and for the whitespotted greenling H. stelleri, it varied from 30% to 100% by weight, depending on greenling size and year (Napazakov 2008). This intensive period of piscivory inside the Seguam Pass TEZ in June may provide essential caloric needs for fish going into a reproductive season.…”

Section: Discussionmentioning

confidence: 97%

Defining Essential Fish Habitat for Atka Mackerel with Respect to Feeding within and Adjacent to Aleutian Islands Trawl Exclusion Zones

Rand¹,

Löwe²

2011

Mar Coast Fish

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The distribution patterns of Atka mackerel Pleurogrammus monopterygius were examined, both seasonally and spatially, to identify essential feeding habitat and to add to existing knowledge of diet composition. The study focused on two local aggregations in the Aleutian Islands, Alaska: one at Seguam Pass and one near Amchitka Island. At each locale, we examined the mean stomach fullness (i.e., feeding intensity) and diet composition of randomly selected fish within and outside of trawl exclusion zones (TEZs). The trawl exclusion zones extend out 10–20 nm from Steller sea lion Eumetopias jubatus rookeries and haulouts; no trawling is allowed inside these zones. During four of the six periods examined, mean stomach fullness was higher inside the TEZ than outside it. At Seguam Pass, fish were distributed into northern and southern aggregations and diet composition varied by age, season, and location relative to the TEZs. Feeding intensity appeared to be greatest inside the TEZ in the northern portion of Seguam Pass near a productive frontal region characterized by a transition zone of well‐mixed (upwelling) and stratified water. At Seguam Pass, piscivory occurred almost entirely inside the TEZ in June. Near Amchitka Island, feeding intensity was significantly higher inside the TEZ, which coincided with an increase in egg cannibalism in October. Based on these observations, we suggest that the areas of increased feeding activity in conjunction with diet composition at Seguam Pass and Amchitka Island represent essential feeding habitat for Atka mackerel.

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Section: Discussionmentioning

confidence: 97%

Defining Essential Fish Habitat for Atka Mackerel with Respect to Feeding within and Adjacent to Aleutian Islands Trawl Exclusion Zones

Rand¹,

Löwe²

2011

Mar Coast Fish

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“…The ontogenetic dynamics of the food spectra have been registered for all the studied species. There fore, the data on the food spectra justify the well known polyphagia of the Pacific cod, whitespotted greenling, and sculpins (Tokranov and Vinnikov, 1991;Tokranov, 1992Tokranov, , 2009Napazakov, 2003Napazakov, , 2010Chu chukalo, 2006) and belonging of the sea raven to the benthic ichthyophagous species (Chuchukalo, 2006).…”

Section: Trophic Interactionsmentioning

confidence: 88%

Trophic status and trophic interactions of common predatory fish species of the West Kamchatka shelf

Napazakov¹

2015

J. Ichthyol.

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Feeding and trophic relationships have been studied for the common benthic predatory fish spe cies of the West Kamchatka shelf in 2008-the Pacific cod Gadus macrocephalus, great sculpin Myoxoceph alus polyacanthocephalus, plain sculpin M. jaok, sea raven Hemitripterus villosus, and whitespotted greenling Hexagrammos stelleri. Crustaceans and fish are the main food components of the great sculpin, plain sculpin, Pacific cod, and whitespotted greenling; sea raven feeds on the fish mostly. The ontogenetic changes of the food spectra have been tracked for all the studied species. The indexes of the food similarity evidence to the possible food competition between the Pacific cod and all the other species; however, the dissimilarity of the ecological niches may serve as the adaptation to decrease the food competition. The trophic levels of all the studied predators vary from 3.41-4.50; i.e., they are the tertiary consumers. It is justified that the Pacific cod, whitespotted greenling, plain sculpin, and great sculpin are the facultative polyphagous predators, and the sea raven is the obligate bentho and ichthyophagous species on the West Kamchatka shelf.

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Habitat characteristics can influence fish assemblages in high latitude kelp forests

Efird

Konar

2013

Environ Biol Fish

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The diet of white-spotted greenling Hexagrammos stelleri (Hexagrammidae) on the West Kamchatka shelf

Cited by 4 publications

References 1 publication

Defining Essential Fish Habitat for Atka Mackerel with Respect to Feeding within and Adjacent to Aleutian Islands Trawl Exclusion Zones

Defining Essential Fish Habitat for Atka Mackerel with Respect to Feeding within and Adjacent to Aleutian Islands Trawl Exclusion Zones

Trophic status and trophic interactions of common predatory fish species of the West Kamchatka shelf

Habitat characteristics can influence fish assemblages in high latitude kelp forests

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