Donaldson, James C., Maeda, Ken, Iida, Midori, Kobayashi, Hirozumi, Ebner, Brendan C., and Tran, Hau Duc (2023) New distributional records of four amphidromous gobies (Gobioidei: Sicydiinae) in continental Vietnam / Nouvelles occurrences pour quatre gobies amphidromes (Gobioidei : Sicydiinae) au Vietnam continental. Cybium. (In Press)

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Abstract

Sicydiine gobies (Gobioidei: Sicydiinae) are a diverse group of amphidromous fishes distributed across tropical and subtropical regions, particularly in the Indo-Pacific (Chen and Tan, 2005; Keith et al., 2015). Amphidromy is a form of diadromous lifecycle where adults live and reproduce in freshwater environments and their newly hatched larvae migrate downstream to marine environments to develop, before the post-larvae return to fresh water and metamorphose to juveniles (McDowall, 2010). Within the Indo-Pacific region there are seven genera, each with a distinct distribution (Keith et al., 2015). This variation in distribution is hypothesised to be due to a combination of factors including pelagic larval duration, larval behaviour, ocean currents and adult habitat suitability (McDowall, 2010; Taillebois et al., 2012). Sicydiine gobies, along with other diadromous fish, crustacean and mollusc species, typically dominate streams on tropical islands, with subsets of this fauna also found on some continents (McDowall, 2010; Nip, 2010; Castellanos-Galindo et al., 2011; Ebner and Thuesen, 2011; Keith et al., 2015; Maeda et al., 2015). They generally inhabit short steep-coastal-streams in high rainfall areas with clear, fast, flowing water which facilitates the swift oceanward transport of larvae (McDowall, 2010). These habitat characteristics are common on high islands throughout the Indo-Pacific, where geomorphological, climatic and hydrological attributes combine to provide suitable habitat and favour an amphidromous life cycle.

Vietnam has an extensive coastline bordering the Western Pacific Ocean and is adjacent to known sicydiine populations (Nip, 2010; Keith et al., 2015), however only one Sicydiine species, Stiphodon multisquamus Wu & Ni, 1986, has been previously recorded from continental Vietnam where it is abundant only in central Vietnam (Maeda et al., 2015). The species is also known from southern Japan, Malaysia, mainland China (Hong Kong and Guangdong), and Hainan. In addition to S. multisquamus, the present study reports the occurrence of four species of sicydiine gobies from mainland Vietnam, being new records for the country.

Item ID:	80771
Item Type:	Article (Research - C1)
ISSN:	2101-0315
Keywords:	Western Pacific Ocean, Vietnam, Sicyopterus, Sicyopus, Stiphodon, Am phidromy, Biogeography, Goby
Copyright Information:	© SFI
Date Deposited:	26 Oct 2023 00:18
FoR Codes:	31 BIOLOGICAL SCIENCES > 3103 Ecology > 310304 Freshwater ecology @ 35% 31 BIOLOGICAL SCIENCES > 3109 Zoology > 310914 Vertebrate biology @ 35% 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management @ 30%
SEO Codes:	18 ENVIRONMENTAL MANAGEMENT > 1803 Fresh, ground and surface water systems and management > 180301 Assessment and management of freshwater ecosystems @ 100%
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