Distribution and biology of blue hake, Antimora rostrata (Pisces: Moridae), along the mid-Atlantic Ridge and off Greenland

Fossen, Inge; Bergstad, Odd Aksel

doi:10.1016/j.fishres.2006.08.023

Cited by 24 publications

(50 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies of A. rostrata have found significant differences in size between males and females, with females larger and heavier than males (Iwamoto, 1975;Wenner and Musick, 1977;Small, 1981;Gordon and Duncan, 1985;Magnú sson, 2001;Kulka et al, 2003;Fossen and Bergstad, 2006). These studies also reported strong patterns of assortment by sex and by size, with larger individuals and a strong female bias in deeper sites.…”

Section: Introductionmentioning

confidence: 79%

“…It has a worldwide distribution, being present in all oceans from 621S to 621N, with the exception of the North Pacific, where it is replaced by its sister species, Antimora microlepis (Small, 1981;Turnov, 1992). A. rostrata is found at depths of 200 to 3000 m although abundance seems to peak at depths 41400 m (Fossen and Bergstad, 2006). Although the species is not commercially important, it is a common (often dominant) bycatch in deepwater fisheries (Kulka et al, 2003;Fossen and Bergstad, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…A. rostrata is found at depths of 200 to 3000 m although abundance seems to peak at depths 41400 m (Fossen and Bergstad, 2006). Although the species is not commercially important, it is a common (often dominant) bycatch in deepwater fisheries (Kulka et al, 2003;Fossen and Bergstad, 2006). As a consequence, according to catch data from standardized research-trawl surveys, the blue hake is estimated to have declined in relative abundance by approximately 93% in the western North Atlantic over the period 1978-1994(Devine et al, 2006.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the maturing and newly spent specimens were observed at depths 41400 m. Magnú sson therefore suggests that spawning (at least in Icelandic waters) takes place in late autumn or winter. Counts of presumed annuli from otoliths indicated a maximum age of 25 years (Fossen and Bergstad, 2006), with females appearing to live longer than males. However, because of paucity of spawning or spent individuals, it has not been possible to estimate age at maturity.…”

Section: Introductionmentioning

confidence: 99%

“…The distribution of individuals by size and sex has led several investigators to suggest that the area off Greenland might act as a nursery for the species, and that there is gradual migration to other areas (Wenner and Musick, 1977;Fossen and Bergstad, 2006). However, eggs, larvae or spawning fish have not been observed off Greenland (Kulka et al, 2003), and the occurrence of small A. rostrata along the slopes to the west of the British Isles (Gordon and Duncan, 1985) suggests that spawning might be more widely distributed.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Genetic panmixia and demographic dependence across the North Atlantic in the deep-sea fish, blue hake (Antimora rostrata)

et al. 2010

View full text Add to dashboard Cite

The efficient investment of resources and effort into conservation strategies depends on the accurate identification of management units. At the same time, understanding the processes by which population structure evolves requires an understanding of the conditions under which panmixia may exist. Here, we study a species with an unusual, apparently sex-biased pattern of distribution, and test the hypothesis that distribution processes associated with this pattern (for example, congregating at a single dominant spawning site or periodic mixing during reproduction) could lead to panmixia over a large geographic range. Using 13 microsatellite markers, we compared 393 blue hake (Antimora rostrata) from 11 sample sites across a geographic range of over 3000 km, and found no evidence of population structure. We estimated current effective population size and found it to be large (B15 000) across the sampled area. In addition, we used simulation models to test expectations about demographic correlation among populations and our ability to detect relevant levels of gene flow. All data were consistent with the interpretation of long-range panmixia.

show abstract

Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Genetic panmixia and demographic dependence across the North Atlantic in the deep-sea fish, blue hake (Antimora rostrata)

et al. 2010

View full text Add to dashboard Cite

show abstract

Biodiversity Patterns and Processes on the Mid‐Atlantic Ridge

Vecchione

Bergstad

Byrkjedal

et al. 2010

Life in the World's Oceans

Self Cite

View full text Add to dashboard Cite

An assessment of age and growth of violet cod (Antimora rostrata) in the Ross Sea, Antarctica

Horn

Sutton

2015

Polar Biol

View full text Add to dashboard Cite

Violet cod (Antimora rostrata) are a bycatch of the longline fishery for toothfish (Dissostichus mawsoni and D. eleginoides) in the Ross Sea, Antarctica. The productivity of this species in Antarctica was unknown, so counts of zones visible in sectioned otoliths of A. rostrata were used to estimate growth parameters. Von Bertalanffy parameters (with 95 % confidence intervals) derived for male and female fish combined are L ? , 82.2 ± 20.9 cm total length; K, 0.047 ± 0.034 year -1 ; and t 0 , -0.6 ± 6.0 years. Violet cod in the Ross Sea appear to have low productivity; they are slow-growing and relatively long-lived, with a maximum estimated age of 41.5 years. There was no apparent difference between sexes in length at age, although males are poorly represented in the longline catch. The growth rate of violet cod in Antarctic waters appeared to be faster than for the same species around New Zealand, about 20°of latitude to the north. The growth parameters must be considered preliminary because the otoliths are quite difficult to interpret, the sampled fish do not represent the full-length distribution of the population (i.e. small fish were absent), and the ageing technique has not been validated.

show abstract

Distribution and biology of blue hake, Antimora rostrata (Pisces: Moridae), along the mid-Atlantic Ridge and off Greenland

Cited by 24 publications

References 34 publications

Genetic panmixia and demographic dependence across the North Atlantic in the deep-sea fish, blue hake (Antimora rostrata)

Genetic panmixia and demographic dependence across the North Atlantic in the deep-sea fish, blue hake (Antimora rostrata)

Biodiversity Patterns and Processes on the Mid‐Atlantic Ridge

An assessment of age and growth of violet cod (Antimora rostrata) in the Ross Sea, Antarctica

Contact Info

Product

Resources

About