Life history of<i>Galaxias divergens</i>(Salmonoidea: Galaxiidae)

Hopkins, C. L.

doi:10.1080/00288330.1971.9515366

Cited by 35 publications

(30 citation statements)

References 4 publications

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“…Previous studies of the diets of upland bully (Hopkins 1970;Staples 1975), longfinned eel (Burnet 1969;Hopkins 1970;Cadwallader 1975a), Galaxias spp. (Cadwallader 1975a,b), and brown trout (Burnet 1969;Hopkins 1970;Cadwallader 1975a) also showed these species to be opportunistic feeders with the benthos as the principal food source.…”

Section: Discussionmentioning

confidence: 99%

“…(Cadwallader 1975a,b), and brown trout (Burnet 1969;Hopkins 1970;Cadwallader 1975a) also showed these species to be opportunistic feeders with the benthos as the principal food source. However, whereas the bullies and eels fed directly on the benthos, Hopkins (1970) considered brown trout to feed to a great extent on drifting animals originating from the benthos.…”

Section: Discussionmentioning

confidence: 99%

“…Most of these have dealt either with the interactions of the introduced brown trout and native species (e.g., Allen 1961;Burnet 1969;Hopkins 1970;Cadwallader 1975a), or with trout alone (e.g., Allen 1951;Percival & Burnet 1963). Studies of the feeding of New Zealand's native freshwater fish include those on redfinned bully Gobiotnorphus huttoni (McDowall 1965), upland bully G. breviceps (Staples 1975), Galaxias vulgaris (Cadwallader 1975b), Canterbury mudfish Neochanna burrowsius (Cadwallader 1975c;Eldon 1979), and brown mudfish Neochanna apoda (Eldon 1978).…”

Section: Introductionmentioning

confidence: 99%

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Food and feeding of small fish in the Rakaia River, New Zealand

Sagar

Eldon

1983

New Zealand Journal of Marine and Freshwater Research

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Benthic macroinvertebrates and fish species were collected at monthly intervals during a 12-month period, from 3 areas of the lower Rakaia River. The composition and abundance of the benthos and stomach contents of the fish were analysed for seasonal trends, food niche breadth and overlap between pairs of fish species, and overlap between the benthos and the diet of each fish species. The diets of bluegilled bully (Gobiomorphus hubbsi), upland bully (G. breviceps), juvenile longfinned eel (Anguilla dieffenbachii), Galaxias brevipinnis, G. paucispondylus, and juvenile brown trout (Salmo trutta) were similar to the proportions of prey species in the benthos. Deleatidium and chironomid larvae dominated the benthos in all seasons and formed the majority of food items in the diet of these species. Food niche overlap between these species was high, indicating potential competition, but preferred habitat and feeding habit differences plus low fish population density and abundance of main prey items probably eliminate the occurrence of any serious competition. The diet of the other fish species differed from this pattern. The common bully (Gobiomorphus cotidianus) ate proportionally more chironomid larvae and fish eggs than occurred in the benthos; torrentfish (Cheimarrichthys fosteri) ate proportionally more chironomid larvae than occurred in the benthos; and quinnat salmon (Oncorhynchus tshawytscha) depended largely upon prey species of terrestial origin, such as adult Deleatidium and dipterans.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Food and feeding of small fish in the Rakaia River, New Zealand

Sagar

Eldon

1983

New Zealand Journal of Marine and Freshwater Research

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“…Those of banded kokopu {Galaxias fasciatus Gray) were described by Ots & Eldon (1975); of inanga (G. maculatus (Jenyns)) by Benzie (1968b), andMcDowall (1968); of common river galaxias (G. vulgaris Stokell) by Benzie (1968a) and Cadwallader (1976); and of dwarf galaxias (G. divergens Stokell) by Hopkins (1971). The larvae of other New Zealand Galaxias species remain undescribed.…”

Section: Identificationmentioning

confidence: 99%

“…Common river galaxias and dwarf galaxias are known as spring spawners (Benzie 1968a;Hopkins 1971;Cadwallader 1976), so that it is unlikely that our larvae belong to these species. Furthermore, at least common river galaxias is hitherto known in West Coast catchments only in the Maruia River, headwaters of the Buller River system (McDowall 1990).…”

Section: Identificationmentioning

confidence: 99%

Emigrating larvae of koaro,Galaxias brevipinnisGünther (Teleostei: Galaxiidae), from the Otira River, New Zealand

McDowall

Suren

1995

New Zealand Journal of Marine and Freshwater Research

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Fish larvae were collected in stream benthic invertebrate drift nets from the Otira River, near Arthur's Pass, New Zealand during a study of benthic drift. They are identified as probably those of koaro (Galaxias brevipinnis Gunther) on the basis of estimates of myomere counts (indicating Galaxiidae or Retropinnidae); by a process of elimination of likely species on the basis of distance up stream, elevation, and habitat characteristics; and by determining fish species in the Otira River tributaries upstream of the sampling location. This comprises the first likely record of emigrating larvae of koaro, a species known to be diadromous by the return migrations from the sea of whitebait juveniles during spring. A newly hatched larva of koaro is described and figured.

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The Freshwater Fishes

McDowall¹,

Whitaker²

1975

Biogeography and Ecology in New Zealand

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Life history ofGalaxias divergens(Salmonoidea: Galaxiidae)

Cited by 35 publications

References 4 publications

Food and feeding of small fish in the Rakaia River, New Zealand

Food and feeding of small fish in the Rakaia River, New Zealand

Emigrating larvae of koaro,Galaxias brevipinnisGünther (Teleostei: Galaxiidae), from the Otira River, New Zealand

The Freshwater Fishes

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