Deep-sea fish distribution varies between seamounts: Results from a seamount complex off New Zealand

Dianne Tracey, Malcolm Clark, Owen Anderson, Susan Kim

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Fish species data from a complex of seamounts off New Zealand termed the "Graveyard Seamount Complex' were analysed to investigate whether fish species composition varied between seamounts. Five seamount features were included in the study, with summit depths ranging from 748-891 m and elevation from 189-352 m. Measures of fish species dominance, rarity, richness, diversity, and similarity were examined. A number of factors were explored to explain variation in species composition, including latitude, water temperature, summit depth, depth at base, elevation, area, slope, and fishing effort. Depth at base and slope relationships were significant with shallow seamounts having high total species richness, and seamounts with a more gradual slope had high mean species richness. Species similarity was modelled and showed that the explanatory variables were driven primarily by summit depth, as well as by the intensity of fishing effort and elevation. The study showed that fish assemblages on seamounts can vary over very small spatial scales, in the order of several km. However, patterns of species similarity and abundance were inconsistent across the seamounts examined, and these results add to a growing literature suggesting that faunal communities on seamounts may be populated from a broad regional species pool, yet show considerable variation on individual seamounts.

    Original languageEnglish
    Article numbere36897
    Pages (from-to)1-12
    Number of pages12
    JournalPLoS One
    Volume7
    Issue number6
    DOIs
    Publication statusPublished - 20 Jun 2012

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