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Abundance and culture trials of R uditapes philippinarum ( A dam and R eeve, 1850), and abundance of T ellina ( Q uidnipagus) palatum ( I redale, 1929) at two sites in K āne'ohe B ay, O 'ahu, H awai'i
Author(s) -
Haws Maria C,
Pascua Puá alaikahonihò omau,
Howerton Robert,
Kawelo Angela Hi'ilei,
Kotubetey Keliiahonui
Publication year - 2014
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03228.x
Subject(s) - ruditapes , biology , bay , fishery , abundance (ecology) , aquaculture , shellfish , bivalvia , ecology , mollusca , oceanography , aquatic animal , fish <actinopterygii> , geology
Abundance, length‐frequencies and distribution of R uditapes philippinarum ( M anila C lams) and T ellina ( Q uidnipagus) palatum were measured at two beaches in K āne'ohe B ay, O 'ahu, H awai'i in J une, 2010. Abundances had decreased from 866.2 m −2 to 3.4 m −2 for R uditapes and from 75.5 m −2 to 1.5 m −2 for T . palatum since 1977. Distribution of both species was patchy, but both were most commonly found >40 m from shore. Size frequencies of live clams compared with empty shells suggest that few R uditapes survive to sexual maturity. A similar trend was not detected for T . palatum . Aquaculture trials of R . philippinarum were conducted at the H e'eia and M oli'i traditional H awaiian fishponds in the same bay. The clams failed to thrive, although triploid and diploid C rassostrea gigas performed well in concurrent trials in the same fishponds. Current lower abundances for wild R . philippinarum could be due to factors related to predation or nutrient limitations. Previously, two large sewage outfalls existed at the surveyed clam bed areas which may have temporarily increased nutrient availability for both wild and cultured clams. Current nutrient levels may inhibit M anila clam growth and recruitment in K āne'ohe B ay.