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Temporal and spatial variation in length of larval life and size at settlement of the Hawaiian amphidromous goby Lentipes concolor
被引:70
|作者:
Radtke, RL
[1
]
Kinzie, RA
Shafer, DJ
机构:
[1] Univ Hawaii, Sch Ocean & Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA
[2] Univ Hawaii, Dept Zool, Honolulu, HI 96822 USA
关键词:
Gobiidae;
larval life history;
recruitment retrospective analysis;
otoliths;
D O I:
10.1006/jfbi.2001.1705
中图分类号:
S9 [水产、渔业];
学科分类号:
0908 ;
摘要:
Larvae of the Hawaiian amphidromous goby Lentipes concolor settled after a mean length of larval life (LLL) of 86.2 +/-8.5 days (n=236, range=63-106 days) at a mean size of 16.0 +/-0.7=L-T (n=154, range=14.1 17.9 mm). Mean LLL for L concolor was about twice that typically reported for tropical marine gobiids. Variation in LLL (CV=10%) and size at settlement (CV=4%) were low, and comparable to that for marine gobiids. LLL and L-T were weakly positively correlated (Pearson's correlation coefficient r=0.50, P <0.0001). Larvae settled after shorter planktonic lives and at smaller sizes during months with warmer ocean temperatures. Inter-island variation in LLL did not support a dominant south-east to north-west larval drift, following the dominant south-east to north-we-st flow of prevailing currents in the Archipelago, Instead, recruits on Maui Island, centrally located in the archipelago, had shorter LLL than recruits to upstream Hawai'i and downstream Kaua'i islands. These findings have important implications for understanding the complex life history dynamics of amphidromous fishes as well as their management. (C) 2001 The Fisheries Society of the British Isles.
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页码:928 / 938
页数:11
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