Isopoda and Tanaidacea from Buoys in Coastal Waters of the Contintental United States, Hawaii, and the Bahamas (Crustacea)

Miller, Milton A.

doi:10.5479/si.00963801.125-3652.1

Cited by 38 publications

(30 citation statements)

References 6 publications

(7 reference statements)

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“…Potential for long-distance dispersal by rafting has been suggested for some species of sessile invertebrates such as barnacles, gastropods, bivalves, peracarid crustaceans, corals, ascidians and echinoderms (Miller 1968, Jokiel 1984, Stoddart 1984, Highsmith 1985, Martel & Chia 1991, Worcester 1994, Sponer & Roy 2002, Waters & Roy 2004. Although several teleosts have been observed associated with unattached algal clumps or other floating objects (Gooding & Magnuson 1967, Kulczycki et al 1981, Holmquist 1994, there is little evidence suggesting that any fish species may utilize rafting as a means of colonizing remote habitats (Kokita & Omori 1999, Mora 2001.…”

Section: Introductionmentioning

confidence: 99%

Molecular evidence for long-distance colonization in an Indo-Pacific seahorse lineage

Teske¹,

Hamilton²,

Palsbøll³

et al. 2005

Mar. Ecol. Prog. Ser.

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Mitochondrial control region (mtDNA CR) diversity within and among 6 seahorse populations associated with the Indo-Pacific Hippocampus kuda complex (H. kuda from India, Malaysia, Indonesia and the Philippines, H. fuscus from the Red Sea and H. capensis from South Africa) was compared to determine whether there was support for the hypothesis that seahorses are able to colonize remote areas by means of rafting. Analyses performed on the data-set included phylogenetic reconstructions, estimation of relative population ages, tests for evidence of population expansion, pairwise migration rates and divergence times, as well as relationships between genetic and geographic distances. The mtDNA data indicate that all populations have undergone recent expansions, but that the timing of these events differed. The H. kuda population from India was found to be the oldest, whereas the expansion of the H. fuscus population from the Red Sea took place most recently. The fact that all seahorse populations studied are characterized by a single ancestral mtDNA haplotype and migration rates are low in most cases, as well as the fact that no significant relationship between genetic and geographic distances was found, indicates that colonization of distant habitats by a small number of founding individuals may be common in seahorses associated with the H. kuda complex. As the level of subsequent gene flow among populations is low, this may result in rapid speciation.

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Section: Introductionmentioning

confidence: 99%

Molecular evidence for long-distance colonization in an Indo-Pacific seahorse lineage

Teske¹,

Hamilton²,

Palsbøll³

et al. 2005

Mar. Ecol. Prog. Ser.

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“…Furthermore, isopods and tanaids, too, inhabited the floating plants throughout the whole experiment, which lasted >6 months. Miller (1968) suggested that some isopod and tanaid species may have colonised buoys in coastal waters of North America via rafting. Peracarids floating at the surface of the sea have a great capability to attach or cling to floating substrata if they make contact with them.…”

Section: Arthropoda (Crustacea Peracarida)mentioning

confidence: 99%

The Ecology of Rafting in the Marine Environment. Ii. the Rafting Organisms and Community

Thiel¹,

Gutow²

2005

Oceanography and Marine Biology - An Annual Review

349

394

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Rafting of marine and terrestrial organisms has been reported from a variety of substrata and from all major oceans of the world. Herein we present information on common rafting organisms and on ecological interactions during rafting voyages. An extensive literature review revealed a total of 1205 species, for which rafting was confirmed or inferred based on distributional or genetic evidence. Rafting organisms comprised cyanobacteria, algae, protists, invertebrates from most marine but also terrestrial phyla, and even a few terrestrial vertebrates. Marine hydrozoans, bryozoans, crustaceans and gastropods were the most common taxa that had been observed rafting. All major feeding types were represented among rafters, being dominated by grazing/boring and suspension-feeding organisms, which occurred on all floating substrata. Besides these principal trophic groups, predators/scavengers and detritus feeders were also reported. Motility of rafting organisms was highest on macroalgae and lowest on abiotic substrata such as plastics and volcanic pumice. Important trends were revealed for the reproductive biology of rafting organisms. A high proportion of clonal organisms (Cnidaria and Bryozoa) featured asexual reproduction, often in combination with sexual reproduction. Almost all rafting organisms have internal fertilisation, which may be due to the fact that gamete concentrations in the rafting environment are too low for successful fertilisation of external fertilisers. Following fertilisation, many rafting organisms incubate their offspring in/on their body or deposit embryos in egg masses on rafts. Local recruitment, where offspring settle in the immediate vicinity of parents, is considered an important advantage for establishing persistent local populations on a raft, or in new habitats. Some organisms are obligate rafters, spending their entire life cycle on a raft, but the large majority of reported rafters are considered facultative rafters. These organisms typically live in benthic (or terrestrial) habitats, but may become dispersed while being confined to a floating item. Substratum characteristics (complexity, surface, size) have important effects on the composition of the rafting community. While at sea, ecological interactions (facilitation, competition, predation) contribute to the community succession on rafts. Organisms capable to compete for and exploit resources on a raft (space and food) will be able to persist throughout community succession. The duration of rafting voyages is closely related to rafting distances, which may cover various geographical scales. In chronological order, three features of an organism gain in importance during rafting, these being ability to (1) hold onto floating items, (2) establish and compete successfully and (3) develop persistent local MARTIN THIEL & LARS GUTOW 280 populations during a long voyage. Small organisms that do not feed on their floating substratum and, with asexual reproduction or direct development, combine all these features appear to be mos...

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“…Benthic populations of I. metallica are not known even though the species is reported from coastal waters in many parts of the world (Miller 1968;Hartmann 1976;Sano et al 2003;Abello´et al 2004), probably as a consequence of inferiority in interspecific competition with benthic species (Gutow and Franke 2003). Apparently, rafting is a specific and evolutionarily developed life style of I. metallica.…”

Section: Introductionmentioning

confidence: 99%

Behavioural and metabolic adaptations of marine isopods to the rafting life style

et al. 2006

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Rafting on floating objects is a common dispersal mechanism for many marine invertebrates. In order to identify adaptations to the rafting life style, we compared behavioural and metabolic characteristics of two isopods, the obligate rafter Idotea metallica and the facultative rafter Idotea baltica. In laboratory experiments, I. metallica showed low locomotive activity and a tight association to the substratum. Idotea baltica, in contrast, was more active with more frequent excursions in the surrounding water column. Oxygen consumption rates were similar in both species. Idotea metallica fed on zooplankton making this species widely independent of autochthonous food resources of the raft. Feeding rates and digestive enzyme activities were low in I. metallica. Reduced egestion rates may indicate slow gut passage and, thus, efficient resorption of nutrients. Efficient food utilization and the ability to accumulate high amounts of storage products, i.e. lipids, indicate a possible adaptation of I. metallica to low food availability or starvation. The feeding behaviour of I. baltica, in contrast, was more herbivorous and appeared wasteful and inefficient. Low lipid contents in I. baltica also indicate poor storage reserves. Thus, I. baltica requires a permanent access to food.

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Isopoda and Tanaidacea from Buoys in Coastal Waters of the Contintental United States, Hawaii, and the Bahamas (Crustacea)

Cited by 38 publications

References 6 publications

Molecular evidence for long-distance colonization in an Indo-Pacific seahorse lineage

Molecular evidence for long-distance colonization in an Indo-Pacific seahorse lineage

The Ecology of Rafting in the Marine Environment. Ii. the Rafting Organisms and Community

Behavioural and metabolic adaptations of marine isopods to the rafting life style

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