Spatial, seasonal and ontogenetic variation in diet of Northeast Arctic Greenland halibut (Reinhardtius hippoglossoides )

Hovde, S. C.; Albert, Ole Thomas; Nilssen, Einar M.

doi:10.1006/jmsc.2002.1171

Cited by 46 publications

(39 citation statements)

References 26 publications

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“…Smaller individuals are found further off the bottom, and pelagic activity is greatest during early autumn (Vollen & Albert 2008). Prey species depends largely on availability, and diet may therefore vary depending on habitat and season, as well as fish size (Smidt 1969;Hovde et al 2002;Vollen et al 2004;Woll & Gundersen 2004;Simonsen et al 2006). Greenland halibut is a slow-growing predator that may reach a length of 1.2 m and a weight of 25 kg; however, Greenland halibut caught in Norwegian waters seldom reaches 10 kg.…”

Section: Introductionmentioning

confidence: 99%

Concentrations of mercury, arsenic, cadmium and lead in Greenland halibut (Reinhardtius hippoglossoides) caught off the coast of northern Norway

Julshamn¹,

Frantzen²,

Valdersnes³

et al. 2011

Marine Biology Research

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In January 2006 it was reported from Russia that Greenland halibut (Reinhardtius hippoglossoides) caught in the Barents Sea had shown mercury levels exceeding the European Union's upper limit of 0.5 mg/kg wet weight (ww) for this species. These findings were confirmed in a small study from the same area. To gain more knowledge, a larger study was initiated to investigate the levels of mercury in Greenland halibut caught off the coast of northern Norway. A total of 320 Greenland halibut were caught in this area in May 2006. Individual fish were filleted and analysed for mercury, arsenic, cadmium and lead. Round weight of the fish varied between 1.1 and 8.1 kg. Fish age varied between 12 and 29 years. The highest mercury concentration measured in muscle tissue was 1.1 mg/kg ww. The highest concentrations were found in female fish. Mercury concentration was positively correlated with fish size and negatively correlated with fat content. Fish captured in the easternmost part of the investigated area had significantly lower mercury concentrations than those caught further west. Fish captured at one of the positions had particularly high average mercury concentrations, 0.52 mg/kg ww, possibly due to a combination of large size, low fat content and different prey availability. The concentrations of arsenic, cadmium and lead in the fillet samples of Greenland halibut ranged from 1.5 to 32 mg/kg ww, B0.001 to 0.02 mg/kg ww and B0.01 to 0.05 mg/kg ww, respectively. Concentrations of arsenic and mercury were positively correlated when all data were included.

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Section: Introductionmentioning

confidence: 99%

Concentrations of mercury, arsenic, cadmium and lead in Greenland halibut (Reinhardtius hippoglossoides) caught off the coast of northern Norway

Julshamn¹,

Frantzen²,

Valdersnes³

et al. 2011

Marine Biology Research

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“…The study of feeding activities and factors influencing them is thus critically important in our understanding of the dynamics of fish populations. Much effort has been put on the studies of fish prey compositions that show fish feeding characteristics and analyze habitat environments and inter-and intra-species trophic interactions (Shaw & Jenkins, 1992;Hovde et al, 2002;Martins et al, 2006).…”

Section: Introductionmentioning

confidence: 98%

“…For example, Islam et al (2006) found that a single species dietary habit at the upper river in Chikugo estuary for Japanese temperate bass and a multi-species dietary habit were dominated by the common coastal copepods in the lower estuary. Spatial variations in the abundance of some major prey species could cause regional differences in diet composition, and such information can lead us to a better understanding of the ecology and feeding habits of the predator in question (Hovde et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

A spatial analysis of trophic composition: a case study of hairtail (Trichiurus japonicus) in the East China Sea

2009

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The spatial distribution of fish on feeding grounds is an important factor in determining their prey composition. Of the factors that may influence the spatial distribution on the feeding ground and subsequent diet composition is the fish maturation stage. Using hairtail (Trichiurus japonicus) as an example, we evaluated the impacts of gonad development stage on diet composition. Hairtail supports one of the most valuable and largest fisheries in the East China Sea. As one of the top predators, it plays an important role in the ecosystem. We analyzed hairtail stomach samples collected on their feeding grounds from a fisheriesindependent survey program in September 2005. Our analyses suggest that females in their third maturity stage tended to feed more intensively. Fish were the most important preys for hairtail, accounting for 72.6% of the total stomach contents in weight. The four most important fish species were juvenile hairtail (25.2%), Japanese scad (11.4%), Japanese jack mackerel (7.7%), and small yellow croaker (5.9%), suggesting strong cannibalism. A cluster analysis suggests that hairtail could be divided into three groups in their spatial distribution based on their diets: one group with similar percentages of fish and crustacean preys mainly distributed in the south of East China Sea far from the coast; one group mainly consuming fish and distributed over the north of East China Sea near the coast; and the third group consuming mainly crustacean species mainly distributed in the open sea. We hypothesize that gonadal development stage of hairtail may determine their movement from spawning ground to feeding ground, and subsequently spatial distribution on the feeding ground, which in turn results in different feeding intensities and prey compositions.

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“…Understanding trophic interactions is central to fully understanding a species biology, population dynamics, how fishing effects productivity and how changes in relative abundance or population structure may influence the ecosystem. It is of interest to identify the environmental factors that may influence trophic relationships as these, along with ontogeny, largely determine the content and stability of fish diets (Wootton 1992;Hovde et al 2002;Jaworski & Ragnarsson 2006;Byron & Link 2010).…”

Section: Introductionmentioning

confidence: 99%

The influence of ontogeny and environment on the diet of lookdown dory,Cyttus traversi

Forman¹,

Dunn²

2010

New Zealand Journal of Marine and Freshwater Research

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Research on trophic relationships is an important component in the move towards an ecosystem approach to fisheries management. The diet of lookdown dory, Cyttus traversi, was determined from examination of stomach contents of 239 specimens of 13.9Á50.7 cm total length (TL), sampled at depths of 220Á744 m on Chatham Rise, New Zealand. The diet was characterised by the macrourid fish, Coelorinchus oliverianus, the natant decapods, Lipkius holthuisi, Campylonotus rathbunae, Sergestes spp., Notopandalus magnoculus, and Pasiphaea spp., and the galatheid, Munida gracilis. Multivariate analyses using distance-based linear models, nonparametric multi-dimensional scaling and similarity percentages indicated the best predictors of diet variability were depth and fish length. Diet changes associated with depth were most apparent in the crustacean prey. Changes in the diet with ontogeny suggested four ontogenetic trophic units: pelagic ( B13.9 cm TL), juveniles (13.9Á25.8 cm TL; benthopelagic invertebrate feeders), maturing females and males (26Á39.5 cm; benthopelagic omnivores) and mature females ( !40 cm TL; benthopelagic piscivores/omnivores).

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Spatial, seasonal and ontogenetic variation in diet of Northeast Arctic Greenland halibut (Reinhardtius hippoglossoides )

Cited by 46 publications

References 26 publications

Concentrations of mercury, arsenic, cadmium and lead in Greenland halibut (Reinhardtius hippoglossoides) caught off the coast of northern Norway

Concentrations of mercury, arsenic, cadmium and lead in Greenland halibut (Reinhardtius hippoglossoides) caught off the coast of northern Norway

A spatial analysis of trophic composition: a case study of hairtail (Trichiurus japonicus) in the East China Sea

The influence of ontogeny and environment on the diet of lookdown dory,Cyttus traversi

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