Diet and daily ration of two nototheniid fish on the shelf of the sub-Antarctic Prince Edward Islands

T. Bushula, EA Pakhomov, S. Kaehler, S. Davis, Robert Kalin

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The seasonal dietary composition and estimates of daily consumption rate of Lepidonotothen larseni and Gobionotothen marionensis juveniles were obtained for the first time using fish collected near sub-Antarctic Prince Edward Islands during April 1999-2003. The diet of L. larseni consisted mainly of pelagic prey, with copepods and arrow worms making up the most significant prey groups and accounting for 46% and 40% of prey mass, respectively. The diet of G. marionensis was more diverse than that of L. larseni and was composed mainly of benthic prey, including bottom-dwelling decapods (Nauticaris marionis) and sedentary polychaetes, which accounted for 54% and 30% of prey mass, respectively. During the present study, dietary overlap between juveniles of L. larseni and G. marionensis was very low (< 5%) indicating that competition for food resources between them was negligible. They not only relied on different prey species, both also exhibited different diel feeding regimes. Daily consumption rate of L. larseni and G. marionensis juveniles was estimated to be 4.5% and 5.2% of body dry mass, respectively. Stomach contents and stable isotope analyses suggested, that both L. larseni and G. marionensis occupy the forth-trophic level of the sub-Antarctic food web but depend mainly on allochthonous and autochthonous (kelp derived) organic matter, respectively.
LanguageEnglish
Pages585-593
Number of pages8
JournalPolar Biology
Volume28
Issue number8
Early online date15 Apr 2005
DOIs
Publication statusPublished - 31 Jul 2005

Fingerprint

Prince Edward Island
Nototheniidae
Fishes
Kelp
Decapoda (Crustacea)
Diet
Copepoda
Gastrointestinal Contents
Food Chain
diet
Isotopes
diet study techniques
Food
Decapoda
Polychaeta
stable isotopes
food webs
macroalgae
stomach
organic matter

Keywords

  • marine biology
  • aquaculture

Cite this

Bushula, T. ; Pakhomov, EA ; Kaehler, S. ; Davis, S. ; Kalin, Robert. / Diet and daily ration of two nototheniid fish on the shelf of the sub-Antarctic Prince Edward Islands. In: Polar Biology. 2005 ; Vol. 28, No. 8. pp. 585-593.
@article{7f7e9404fef84bcdb3aa0ff7fec10fd1,
title = "Diet and daily ration of two nototheniid fish on the shelf of the sub-Antarctic Prince Edward Islands",
abstract = "The seasonal dietary composition and estimates of daily consumption rate of Lepidonotothen larseni and Gobionotothen marionensis juveniles were obtained for the first time using fish collected near sub-Antarctic Prince Edward Islands during April 1999-2003. The diet of L. larseni consisted mainly of pelagic prey, with copepods and arrow worms making up the most significant prey groups and accounting for 46{\%} and 40{\%} of prey mass, respectively. The diet of G. marionensis was more diverse than that of L. larseni and was composed mainly of benthic prey, including bottom-dwelling decapods (Nauticaris marionis) and sedentary polychaetes, which accounted for 54{\%} and 30{\%} of prey mass, respectively. During the present study, dietary overlap between juveniles of L. larseni and G. marionensis was very low (< 5{\%}) indicating that competition for food resources between them was negligible. They not only relied on different prey species, both also exhibited different diel feeding regimes. Daily consumption rate of L. larseni and G. marionensis juveniles was estimated to be 4.5{\%} and 5.2{\%} of body dry mass, respectively. Stomach contents and stable isotope analyses suggested, that both L. larseni and G. marionensis occupy the forth-trophic level of the sub-Antarctic food web but depend mainly on allochthonous and autochthonous (kelp derived) organic matter, respectively.",
keywords = "marine biology, aquaculture",
author = "T. Bushula and EA Pakhomov and S. Kaehler and S. Davis and Robert Kalin",
year = "2005",
month = "7",
day = "31",
doi = "10.1007/s00300-005-0729-2",
language = "English",
volume = "28",
pages = "585--593",
journal = "Polar Biology",
issn = "0722-4060",
number = "8",

}

Diet and daily ration of two nototheniid fish on the shelf of the sub-Antarctic Prince Edward Islands. / Bushula, T.; Pakhomov, EA; Kaehler, S.; Davis, S.; Kalin, Robert.

In: Polar Biology, Vol. 28, No. 8, 31.07.2005, p. 585-593.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Diet and daily ration of two nototheniid fish on the shelf of the sub-Antarctic Prince Edward Islands

AU - Bushula, T.

AU - Pakhomov, EA

AU - Kaehler, S.

AU - Davis, S.

AU - Kalin, Robert

PY - 2005/7/31

Y1 - 2005/7/31

N2 - The seasonal dietary composition and estimates of daily consumption rate of Lepidonotothen larseni and Gobionotothen marionensis juveniles were obtained for the first time using fish collected near sub-Antarctic Prince Edward Islands during April 1999-2003. The diet of L. larseni consisted mainly of pelagic prey, with copepods and arrow worms making up the most significant prey groups and accounting for 46% and 40% of prey mass, respectively. The diet of G. marionensis was more diverse than that of L. larseni and was composed mainly of benthic prey, including bottom-dwelling decapods (Nauticaris marionis) and sedentary polychaetes, which accounted for 54% and 30% of prey mass, respectively. During the present study, dietary overlap between juveniles of L. larseni and G. marionensis was very low (< 5%) indicating that competition for food resources between them was negligible. They not only relied on different prey species, both also exhibited different diel feeding regimes. Daily consumption rate of L. larseni and G. marionensis juveniles was estimated to be 4.5% and 5.2% of body dry mass, respectively. Stomach contents and stable isotope analyses suggested, that both L. larseni and G. marionensis occupy the forth-trophic level of the sub-Antarctic food web but depend mainly on allochthonous and autochthonous (kelp derived) organic matter, respectively.

AB - The seasonal dietary composition and estimates of daily consumption rate of Lepidonotothen larseni and Gobionotothen marionensis juveniles were obtained for the first time using fish collected near sub-Antarctic Prince Edward Islands during April 1999-2003. The diet of L. larseni consisted mainly of pelagic prey, with copepods and arrow worms making up the most significant prey groups and accounting for 46% and 40% of prey mass, respectively. The diet of G. marionensis was more diverse than that of L. larseni and was composed mainly of benthic prey, including bottom-dwelling decapods (Nauticaris marionis) and sedentary polychaetes, which accounted for 54% and 30% of prey mass, respectively. During the present study, dietary overlap between juveniles of L. larseni and G. marionensis was very low (< 5%) indicating that competition for food resources between them was negligible. They not only relied on different prey species, both also exhibited different diel feeding regimes. Daily consumption rate of L. larseni and G. marionensis juveniles was estimated to be 4.5% and 5.2% of body dry mass, respectively. Stomach contents and stable isotope analyses suggested, that both L. larseni and G. marionensis occupy the forth-trophic level of the sub-Antarctic food web but depend mainly on allochthonous and autochthonous (kelp derived) organic matter, respectively.

KW - marine biology

KW - aquaculture

U2 - 10.1007/s00300-005-0729-2

DO - 10.1007/s00300-005-0729-2

M3 - Article

VL - 28

SP - 585

EP - 593

JO - Polar Biology

T2 - Polar Biology

JF - Polar Biology

SN - 0722-4060

IS - 8

ER -