Temporal and spatial variation in length of larval life and size at settlement of the Hawaiian amphidromous goby Lentipes concolor

Abstract

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 mm 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-west 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. 2001 The Fisheries Society of the British Isles

High gene flow due to pelagic larval dispersal among South Pacific archipelagos in two amphidromous gastropods (Neritomorpha: Neritidae)

“…Other amphidromous species found on oceanic islands have a similarly lengthy PLD (Radtke et al, 2001;Kano, 2006;Hoareau et al, 2007b), an absence of genetic structure across long pelagic distances ( (Myers et al, 2000;Kano and Kase, 2004;Cook et al, 2008). The pelagic larva has only been lost from the life history a few times among the extant freshwater Neritids, and only once in an island species (Holthuis, 1995), even though pelagic larvae have been lost multiple times in other families of marine invertebrates (Duda and Palumbi, 1999;Hart, 2000).…”

“…However, although a community ecologist would view them as freshwater animals (for example, Bandel and Riedel, 1998;Smith et al, 2003), their population ecology may be more similar to that of a marine species, because of their pelagically dispersing larvae. Relatively long pelagic larval durations (PLDs) have been estimated from laboratory cultures of amphidromous gastropod veligers (40-98 days, Holthuis, 1995;Kano, 2006) and the otoliths of amphidromous Galaxiid fishes and gobies (63-266 days, Radtke et al, 1988Radtke et al, , 2001Mcdowall et al, 1994;Hoareau et al, 2007b). These PLDs fall at or above the high end of the range found in the planktotrophic larvae of marine invertebrates (7-293 days, Shanks et al, 2003) and fish (B20-90 days, Brothers et al, 1983).…”

Oceanic larval life of La Réunion ‘bichiques’, amphidromous gobiid post-larvae

“…Most of the studies available on amphidromous Sicydiinae are restricted to Caribbean , Hawaiian (Radtke et al 1988(Radtke et al , 2001, or Taiwanese islands (Shen et al 1998).…”

Komposisi Dankelimpahan Larvaikan Sebagai Dasarpengelolaan Sumberdayaikanditelukcempi, Nusatenggarabarat

“…Selain salinitas dan suhu, parameter lain tidak menunjukkan hubungan yang erat (<0,5) sehingga tidak mempengaruhi kelimpahan larva. Walau demikian beberapa penelitian menyatakan bahwa distribusi yang merata dari makanan dan predator memiliki kontribusi terhadap tingginya kematian larva dan rekruitment (Radtke et al, 2001). Sumber makanan utama larva ikan adalah fitoplankton.…”