Merrett N.R. & Iwamoto T. 2000. Pisces Gadiformes: Grenadier Fishes of the New Caledonian region, Southwest Pacific Ocean. Taxonomy and distribution with ecological notes, in Crosnier A.(Ed.), Résultats des campagnes MUSORSTOM 21. Mémoires du Muséum national d'Histoire naturelle 184:723-781, ISBN:2-85653-526-7
We reported in an earlier paper the great species richness of the grenadier fauna (families Bathygadidae and Macrouridae) from recent bathyal trawl collections made mainly during MUSORSTOM cruises in the New Caledonian region. Here we add information from further samples to complement earlier taxonomic findings, and descriptions of 2 new species, together with comments on species, distribution and ecology. Thus a total of 2055 specimens from 221 samples examined representing 20 genera and 63 species were found to have closest similarity in composition with New South Wales, Western Australia and New Zealand. As expected, dissimilarity increased with distance from New Caledonia. Four genera dominated in species richness: Caelorinchus (17), Hymenocephalus (8), Nezumia (5) and Ventrifossa (6), comprising 2/3 of the total fauna. The generic make-up of the faunas closest to New Caledonia were most consistent with that region; propordons varied radically from there in the more distant regions invesdgated. Bathymetrically, the smaller trawls of the MUSORSTOM surveys collected grenadiers over a range of tows shallower than that reflected by the commercial gear used on the HALIPRO 2 cruise, with a generally smaller size of fish sampled. Co-occurrence of grenadier species within similar depth strata on the slope was remarkably high, with only two of the 63 species not represented, at least over part of their depth range, in the upper 1600 m. Species richness peaked at 37 in both the 700 and 800 tn strata, although it did not drop below 20 across the depth range 400-1100 m and reduced substantially only deeper than 1400 m.
Accessible surveys cited (5) [+]
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