Diet of orange roughy, Hoplostethus atlanticus (Pisces: Trachichthyidae) on the Challenger Plateau, New Zealand

Rosecchi, E.; Tracey, Dianne M.; Webber, W. Richard

doi:10.1007/bf00391992

Cited by 41 publications

(51 citation statements)

References 18 publications

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“…Kotlyar & Lipskaya (1980) found pasiphaeids to be important in the diet of fish off the West Australian and Madagascar k d g e s . The main families of the fish eaten by H. atlanticus were the chauliodontids and myctophids, as in the New Zealand study (Rosecchi et al 1988). Squid comprised about 10 O/ O of the diet in terms of frequency of occurrence, which is consistent with previous reports (Kotlyar & Lipskaya 1980, Rosecchi et al 1988.…”

Section: Periodicity In Digestion Stagesupporting

confidence: 90%

“…of tows 50 4 0 13 12 14 129 tacea, fish and squid. Pasiphaeids, oplophonds and sergestids were the major decapod taxa consumed, as in New Zealand (Rosecchi et al 1988). Kotlyar & Lipskaya (1980) found pasiphaeids to be important in the diet of fish off the West Australian and Madagascar k d g e s .…”

Section: Periodicity In Digestion Stagementioning

confidence: 98%

“…The species has not been maintained under laboratory conditions, and Rosecchi et al (1988) found no evidence of die1 periodicity in feeding, from which digestion rates may be estimated using stomach-content data from the field (Eggers 1977, Clarke 1978. Bathypelagic organisms generally consume less food than shallower species, possibly because their metabolism is lower rather than due to decreased growth rate (Torres et al 1979, Childress et al 1980, Mauchline 1988.…”

Section: Inter-research/printed In Germanymentioning

confidence: 99%

“…Orange roughy are found in the northeast Atlantic (Mauchline & Gordon 1984), around the southern coast of South Africa to Madagascar and on the West Australian ridge in the Indian Ocean (Kotlyar 1980, Smith & Heemstra 1986), but commercially significant quantities are not known from these regions. Studies in several parts of the world ocean (Kotlyar & Lipskaya 1980, Mauchline & Gordon 1984, Gordon & Duncan 1987, Rosecchi et al 1988 show consistently that orange roughy feed on bentho-and mesopelagic crustaceans, fish and squid. Crustaceans predominate in the diet of small orange roughy, and their diet shifts to fish as they grow (Rosecchi et al 1988).…”

Section: Introductionmentioning

confidence: 99%

“…Studies in several parts of the world ocean (Kotlyar & Lipskaya 1980, Mauchline & Gordon 1984, Gordon & Duncan 1987, Rosecchi et al 1988 show consistently that orange roughy feed on bentho-and mesopelagic crustaceans, fish and squid. Crustaceans predominate in the diet of small orange roughy, and their diet shifts to fish as they grow (Rosecchi et al 1988). Orange roughy seems to be an opportunistic, generalized benthopelagic predator similar to other fish at these depths (Mauchline & Gordon 1986, Blaber & Bulman 1987.…”

Section: Introductionmentioning

confidence: 99%

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Diet and food consumption of a deep-sea fish orange roughy Hoplostethus atlanticus (Pisces Trachichthyidae), off southeastern Australia

Bulman¹,

Koslow²

1992

Mar. Ecol. Prog. Ser.

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We examined the diet of nearly 7500 orange roughy Hoplostethus atlanticus Collett. 1889 from southeastern Australian waters caught during trawl surveys in 1988 and 1989. Juveniles fed mainly on bentho-and meso-pelagic crustaceans, while mature fish consumed predominantly fish and squid. The con~position of the diet changed significantly ~l t h depth, geographical area, and year. Evidence of die1 feeding periodicity found in adults at a station sampled over 42 h was supported by patterns of stomach fullness and digestion stage in the full data set. Based upon observed rates of stomach evacuation, daily rates of food consumption were estimated as 1.15 % body weight for adults and 0.91 'L, for juveniles. The metabolism of orange roughy, estimated from a mass balance model, is similar to that of active, migratory mesopelagic fishes and substantially higher than that of non-migratory bathypelagic fishes. The bodily composition of orange roughy, which is high in lipid and protein and low in water, is also similar to that of active rnesopelaglc f~shes. Non-migratory bathypelagic fish.es typically have exceptionally low metabolic rates. which, d e s p~t e low food consumption, lead to high growth rates and high growth efficiency. Orange roughy, however, appears to have very high metabolic costs, which lead to an exceptionally low growth rate and growth efficiency, despite relatively high rates of food consumption.

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Section: Periodicity In Digestion Stagesupporting

confidence: 90%

Section: Periodicity In Digestion Stagementioning

confidence: 98%