Distribution, morphology, and biochemical genetics of Coryphaenoides armatus and C. yaquinae (Pisces:Macrouridae) in the central and eastern North Pacific

Wilson, Raymond R.; Waples, Robin S.

doi:10.1016/0198-0149(83)90092-4

Cited by 48 publications

(26 citation statements)

References 19 publications

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“…The low metabolism of C. (N.) armatus must therefore be an adaptation to the low food supply to the abyss, allowing it to dominate the scavenging fauna in the abyssal areas of the world's oceans. Only in the highly oligotrophic central North Paci¢c is the dominance of C. (N.) armatus challenged, by replacement with Coryphaenoides ( Nematonurus) yaquinae (Wilson & Waples 1983), and this species may have an even lower metabolism than C. (N.) armatus.…”

Section: Discussionmentioning

confidence: 99%

In situ comparison of activity in two deep-sea scavenging fishes occupying different depth zones

Collins

Priede

Bagley

1999

Proc. R. Soc. Lond. B

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The activity of two scavenging deep-sea ¢shes occupying the same niche in overlapping depth zones were compared by in situ measurements of swimming speeds, tail-beat frequencies and by arrival time at baits. At 4800 m on the Porcupine Abyssal Plain, the grenadier Coryphaenoides (Nematonurus) armatus was the dominant scavenger, arriving at baits after 30 min, and swimming at relatively slow speeds of 0.17 body lengths (BL) sec À1 . At 2500 m in the relatively food rich Porcupine Seabight both C. (N.) armatus and the blue-hake, Antimora rostrata, were attracted to bait, but A. rostrata was always the ¢rst to arrive and most of the bait was consumed before the C. (N.) armatus arrived. A. rostrata swam at mean speeds of 0.39 BL sec À1 , similar to related shallow water species at equivalent temperatures. Observations on tail-beat frequency from video sequences con¢rmed the greater activity of A. rostrata. The data indicate that, given su¤cient food supply, high pressure and low temperature do not limit activity levels of demersal deep-sea ¢shes. Low activity of C. (N.) armatus is an adaptation to poor food supply in the abyss, where these ¢shes dominate, but prevents it competing with the more active A. rostrata in shallower depths.

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Section: Discussionmentioning

confidence: 99%

In situ comparison of activity in two deep-sea scavenging fishes occupying different depth zones

Collins

Priede

Bagley

1999

Proc. R. Soc. Lond. B

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“…Coryphaenoides yaquinae are the dominant macrourid at depths greater than 4700 m in the Pacific Ocean ( Wilson & Waples 1983) and have been previously observed in large numbers at baited camera deployments at 5900 m in the North Pacific Ocean (Priede et al 1990). We recognize that, in the absence of physical specimens, species identification from video images must remain slightly tentative.…”

Section: K1mentioning

confidence: 99%

Liparid and macrourid fishes of the hadal zone:in situobservations of activity and feeding behaviour

et al. 2008

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Using baited camera landers, the first images of living fishes were recorded in the hadal zone (6000-11 000 m) in the Pacific Ocean. The widespread abyssal macrourid Coryphaenoides yaquinae was observed at a new depth record of approximately 7000 m in the Japan Trench. Two endemic species of liparid were observed at similar depths: Pseudoliparis amblystomopsis in the Japan Trench and Notoliparis kermadecensis in the Kermadec Trench. From these observations, we have documented swimming and feeding behaviour of these species and derived the first estimates of hadal fish abundance. The liparids intercepted bait within 100-200 min but were observed to preferentially feed on scavenging amphipods. Notoliparis kermadecensis act as top predators in the hadal food web, exhibiting up to nine suction-feeding events per minute. Both species showed distinctive swimming gaits: P. amblystomopsis (mean length 22.5 cm) displayed a mean tailbeat frequency of 0.47 Hz and mean caudal : pectoral frequency ratio of 0.76, whereas N. kermadecensis (mean length 31.5 cm) displayed respective values of 1.04 and 2.08 Hz. Despite living at extreme depths, these endemic liparids exhibit similar activity levels compared with shallow-water liparids.

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“…Molecular markers are especially useful in organisms whose distribution, biology and ecology are poorly known because of inaccessibility of their habitats, hampering direct observation or experimentation; a good example is the deep sea [1]. Genetic studies on deep-sea fishes have thus clarified their systematics, as in the grenadiers Coryphaenoides armatus and C. yaquinae, whose respective geographic distributions and depth preferences have also been shown to be distinct [2]. Some studies have reported genetic differences at the regional scale, as in the hoki Macruronus novaezelandiae [3].…”

Section: Introductionmentioning

confidence: 99%

Extensive gene flow within sibling species in the deep-sea fish Beryx splendens

Hoarau

Borsa

2000

Comptes Rendus de l'Académie des Sciences - Series III - Scienc

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-Molecular markers allow insights into the population biology and ecology of deep-sea organisms, which are usually hardly accessible to direct observation and poorly known. Such a study was undertaken here for the deep-sea fish Beryx splendens, a species of growing interest to fisheries. B. splendens populations were sampled on seamounts and continental margins in the southwestern Pacific (New Caledonia, New Zealand, southeastern Australia) and in the northeastern Atlantic. Two hundred and fifty individuals were characterised by their single-strand DNA conformation (SSCP) of a z 360-base-pair (bp) fragment of the mitochondrial cytochrome b gene, amplified by the polymerase chain reaction (PCR). Two major SSCP haplotypes were observed in New Caledonia, a and w, whose frequencies were negatively correlated along a north-to-south cline. All SSCP haplotypes in the total sample were sequenced on 273 bp. The phylogenetic tree of B. splendens haplotype sequences, rooted by two B. decadactylus sequences, showed that a and w belong to distinct mitochondrial clades, A and W, which are separated by z 4-6 % nucleotide divergence. Thirty individuals from New Caledonia were characterised by their DNA fingerprint from arbitrary-primed PCR. The distribution of individualpairwise similarity indices was strongly bimodal. The larger similarity values all corresponded to comparisons within a clade (A or W) while the lower values were all between clades. Therefore, there was a strict association between the mitochondrial type and the DNA (presumably, nuclear DNA) fingerprint of an individual. Altogether, these results point to the existence of two biological species (sp. A and sp. W) within the current taxon B. splendens. No within-species differentiation was detected at the regional scale (New Caledonia). A remarkable result is that the three cytochrome b haplotypes of northeastern Atlantic B. cf. splendens sp. A were also the three commonest in the southwestern Pacific populations of this species. Such a level of homogeneity in the distribution of haplotypes suggests there is, or recently has been, gene flow at the inter-oceanic scale.Beryx splendens / geographic structure / systematics / cytochrome b / DNA fingerprints Résumé -Flux géniques élevés chez deux espèces jumelles identifiées chez le poisson de profondeur Beryx splendens. Les marqueurs génétiques moléculaires permettent d'aborder la biologie et l'écologie des populations d'organismes des grands fonds marins, peu accessibles à l'observation directe et en général mal connus. Une telle étude a été ici entreprise chez le poisson de profondeur Beryx splendens, espèce d'intérêt halieutique croissant, dont les populations ont été échantillonnées sur les monts sousmarins et les marges continentales dans le Pacifique Sud-Ouest (Nouvelle-Calédonie, Nouvelle-Zélande, Australie du Sud-Est) et dans l'Atlantique Nord-Est. Deux-cent cinquante individus ont été caractérisés par la conformation ADN simple-brin (SSCP) d'un fragment de z 360 paires de bases (pb) du gène mitochond...

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Distribution, morphology, and biochemical genetics of Coryphaenoides armatus and C. yaquinae (Pisces:Macrouridae) in the central and eastern North Pacific

Cited by 48 publications

References 19 publications

In situ comparison of activity in two deep-sea scavenging fishes occupying different depth zones

In situ comparison of activity in two deep-sea scavenging fishes occupying different depth zones

Liparid and macrourid fishes of the hadal zone:in situobservations of activity and feeding behaviour

Extensive gene flow within sibling species in the deep-sea fish Beryx splendens

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