Feeding habits of the Alaska greenlingHexagrammos octogrammus in the coastal waters of amurskii bay (sea of Japan)

Pushchina, O. I.; Antonenko, D. V.

doi:10.1007/bf02759543

Cited by 3 publications

(4 citation statements)

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“…In addition, egg masses collected from the demersal trawls were primarily found inside the TEZ (Cooper and McDermott, 2011). Similar results of egg cannibalism were reported for the masked greenling (Pushchina and Antonenko 1999), where 15-20% by weight of their fall (September-October) diet was composed of conspecific eggs. Similar to the intensive period of piscivory observed at Seguam Pass, egg cannibalism at Amchitka Island is an important part of their fall diet.…”

Section: Discussionsupporting

confidence: 80%

“…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: 96%

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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: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 96%

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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“…To date studies of feeding ecology of genus Hexagrammos species have centered off coasts of Pacific area such as Southern Sea of Korea, Sea of Japan, China Sea and Bering Sea (Matyushin and Fedotov 1992, Qing 1992, Fujita et al 1995, Kim and Kang 1997, Maksimenkov 1999, Pushchina and Antonenko 2000. Many of these greenling species co-occur, have similar morphology and occupy similar habitat, and are therefore potentially overlapping and competing for the use of resources (Kanamoto 1979, Kim andKang 1993).…”

Section: Introductionmentioning

confidence: 97%

Comparative Feeding Ecology of Two Sympatric Greenling Species, Hexagrammos otakii and Hexagrammos agrammus in Eelgrass Zostera marina Beds

2005

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“…Both juveniles and adults are highly aggressive diurnal ambush predators feeding on a large variety of prey (Matyushin & Fedotov, 1992). In the Peter the Great Bay, the species' diet is dominated by decapods, fish, fish spawn, polychaetes, amphipods, isopods and bivalves, with the proportions of these groups depending on age (Pushchina & Antonenko, 2000). It is highly territorial (especially juveniles), displays parental care and does not form schools (Markevich, 2004; Matyushin & Fedotov, 1992).…”

Section: Introductionmentioning

confidence: 99%

The structure and diversity of retinal ganglion cells in the masked greenling Hexagrammos octogrammus Pallas, 1814 (Pisces: Scorpaeniformes: Hexagrammidae)

Pushchin

Kondrashev

Borshcheva

2022

Journal of Fish Biology

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The authors studied the structure and diversity of retinal ganglion cells (GC) in the masked greenling Hexagrammos octogrammus. In vivo labelling with horseradish peroxidase revealed GCs of various structures in retinal wholemounts. A total of 154 cells were camera lucida drawn, and their digital models were generated. Each cell was characterized by 17 structural and topological parameters. Using nine clustering algorithms, a variety of clusterings were obtained. The optimum clustering was found using silhouette analysis. It was based on a set of three variables associated with dendritic field size and dendrite stratification depth in the retina. A total of nine cell types were discovered. A number of non-parametric tests showed significant pair-wise between-cluster differences in at least four parameters with medium and large effect sizes. Three large-field types differed mainly in dendritic field size, total dendrite length, level of dendrite stratification in the retina and position of somata.Six medium-to small-field types differed mainly in the structural complexity of dendritic arbors and level of dendrite arborization. Cells similar and obviously homologous to types 1-4 were identified in many fish species, including teleosts. Potential homologues of type 5 cells were identified in fewer teleost species. Cells similar to types 6-9 in relative dendritic field size and dendrite arborization pattern were also described in several teleostean species. Nonetheless, their homology is more questionable as their stratification patterns do not match so well as they do in large types.Potential functional matches of the GC types were identified in a number of teleostean species. Type 1 and 2 cells probably match spontaneously active units with the large receptive field centre, so-called dimming and lightening detectors; type 4 may be a counterpart of changing contrast detectors with medium receptive field centre size preferring fast-moving stimuli. Type 3 (biplexiform) cells have no obvious functional matches. Probable functional matches of types 6, 8 and 9 belong to ON-centre elements with small receptive fields such as ON-type direction-selective cells, ON-type spot detectors or ON-type spontaneously active units. Type 5 and 7 cells may match ON-OFF type units, in particular, changing contrast detectors or orientation-selective units. Potential functional matches of GC types presently

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Feeding habits of the Alaska greenlingHexagrammos octogrammus in the coastal waters of amurskii bay (sea of Japan)

Cited by 3 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

Comparative Feeding Ecology of Two Sympatric Greenling Species, Hexagrammos otakii and Hexagrammos agrammus in Eelgrass Zostera marina Beds

The structure and diversity of retinal ganglion cells in the masked greenling Hexagrammos octogrammus Pallas, 1814 (Pisces: Scorpaeniformes: Hexagrammidae)

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