Sponge host characteristics shape the community structure of their shrimp associates

Hultgren, Kristin M.; Duffy, J. Emmett

doi:10.3354/meps08609

Cited by 38 publications

(22 citation statements)

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“…The clade referred to as the Synalpheus gambarelloides species group is restricted largely to the Caribbean and contains more than 45 currently described species (Morrison et al 2004;Hultgren and Duffy 2011). Species in the gambarelloides group live symbiotically within the canals of marine sponges (Hultgren and Duffy 2012) and exhibit a wide range of body sizes, with bigger species generally inhabiting sponge species with larger canals (Hultgren and Duffy 2010). Although most well known for their variation in social behavior, including the only known eusocial species in the marine environment (Duffy 1996;Duffy and Macdonald 2010), increasing knowledge of phylogeny, biogeography, and host use of Synalpheus (Duffy 1996;Morrison et al 2004;Macdonald et al 2006;Duffy 2011, 2012) make them a potential model system for the study of speciation in the sea.…”

Section: Introductionmentioning

confidence: 99%

“…Early genetic studies on Synalpheus brooksi found some evidence for sponge host-associated genetic divergence and the potential for cryptic speciation (Duffy 1993(Duffy , 1996, and subsequent studies have provided additional evidence that different shrimp species are quite host specific, often only occupying one or a few sponge hosts throughout their geographic range (Macdonald et al 2006;Hultgren and Duffy 2010). However, other mechanisms and processes that shaped the speciation and diversification of the Synalpheus gambarelloides species group remain largely unstudied.…”

Section: Introductionmentioning

confidence: 99%

“…This dataset represents a first step towards exploring how genome size changes and (or) genome duplications may have been associated with diversification in Synalpheus. In Synalpheus, body size is variable among species and crucially important in host use, as it not only limits the range of sponge hosts a particular shrimp species can use (Duffy 1993;Hultgren and Duffy 2010) but also mediates interspecific competition when multiple shrimp species inhabit an individual sponge (Hultgren and Duffy 2012). Thus, we also examine the relationship between genome and body size (i.e., carapace length) and explore the degree of phylogenetic signal in genome size.…”

Section: Introductionmentioning

confidence: 99%

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Patterns of genome size variation in snapping shrimp

Jeffery

Hultgren

Chak

et al. 2016

Genome

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Although crustaceans vary extensively in genome size, little is known about how genome size may affect the ecology and evolution of species in this diverse group, in part due to the lack of large genome size datasets. Here we investigate interspecific, intraspecific, and intracolony variation in genome size in 39 species of Synalpheus shrimps, representing one of the largest genome size datasets for a single genus within crustaceans. We find that genome size ranges approximately 4-fold across Synalpheus with little phylogenetic signal, and is not related to body size. In a subset of these species, genome size is related to chromosome size, but not to chromosome number, suggesting that despite large genomes, these species are not polyploid. Interestingly, there appears to be 35% intraspecific genome size variation in Synalpheus idios among geographic regions, and up to 30% variation in Synalpheus duffyi genome size within the same colony.Key words: Synalpheus, genome size, C-value, polyploidy, gene duplication, chromosome. Résumé :Bien que les crustacés présentent une variation considérable en matière de taille de leurs génomes, peu de choses sont connues sur les liens entre la taille du génome et l'écologie ainsi que l'évolution des espèces au sein de ce large groupe. Cela découle en partie de l'absence de grands jeux de données. Dans ce travail, les auteurs ont étudié la variation pour la taille du génome aux niveaux interspécifique, intraspécifique et intracolonie chez 39 espèces de crevettes du genre Synalpheus, constituant ainsi l'un des plus grands jeux de données sur la taille des génomes au sein d'un seul genre parmi les crustacés. Les auteurs trouvent que la taille du génome va du simple au quadruple chez les Synalpheus, sans pour autant générer un signal phylogénétique ou qu'il y ait de lien avec la taille de l'organisme. Au sein de ce sous-ensemble d'espèces, la taille du génome est corrélée avec la taille des chromosomes mais pas leur nombre, ce qui suggère que les grands génomes ne sont pas le résultat de la polyploïdie de ces espèces. Ce qui est intéressant, c'est qu'il semble y avoir une variation intraspécifique pour la taille du génome de 35 % chez l'espèce Synalpheus idios, en fonction de l'origine géographique des spécimens, et jusqu'à 30 % au sein de spécimens du Synalpheus duffyi provenant de la même colonie. [Traduit par la Rédaction]

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Patterns of genome size variation in snapping shrimp

Jeffery

Hultgren

Chak

et al. 2016

Genome

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“…We infer here that the classification into two subgroups is putatively related to host morphologies, as sponge species exhibit a discrete and distinct range of canal sizes. Space partitioning, as well as individual host selection is indeed known to play a significant role in the sponge-dwelling gambarelloides group of Synalpheus (Duffy, 1992;Hultgren and Duffy, 2010;. The speculation that canal sizes of the host may play a significant role in optical acuity of pontoniine species, can however not be substantiated, as the host range of most species remains unknown, with even the identity of many hosts simply not being known.…”

Section: Discussionmentioning

confidence: 99%

Insights into the morphology of symbiotic shrimp eyes (Crustacea, Decapoda, Pontoniinae); the effects of habitat demands

Dobson

Johnson

Grave

2016

Preprint

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Morphometric differences in the optical morphology of symbiotic palaemonid shrimps can be observed among species symbiotic with different host organisms. Discriminant functional analysis revealed three distinct groups within the species examined. Of these, bivalve symbionts appear to have an eye design that is solely unique to this host-symbiont grouping, a design that spans across multiple genera of phylogenetically unrelated animals. Although some taxonomic effects may be evident, this does not explain the difference and similarities in eye morphology that are seen within these shrimps. analysis revealed three distinct groups within the species examined. Of these, bivalve symbionts appear to have an eye design that is solely unique to this host-symbiont grouping, a design that spans across multiple genera of phylogenetically unrelated animals. Although some taxonomic effects may be evident, this does not explain the difference and similarities in eye morphology that are seen within these shrimps. Therefore evolutionary pressures from their host environments are having an impact on the optical morphology of eyes however, as indicated by host-hopping events there ecological adaptations occur post host invasion.

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“…Sizespecific shelter requirements limit crustacean populations through mortality, emigration, or stunting of the affected size classes (Caddy 1986, Caddy & Stamatopoulos 1990, Beck 1995. Alpheid shrimps chose sponge habitat based on the size of suitable channels in the sponge tissue (Duffy 1992), and sponge host size can constrain the size, abundance, and diversity of the associated shrimp community (Hultgren & Duffy 2010). In the Florida Keys, 69% of large Ophiothrix lineata, > 5 mm disk diameter, lived in sponge tubes with >70 cm 2 inner tube surface area (T. P. Henkel unpubl.…”

Section: Introductionmentioning

confidence: 99%

Host specialization of an obligate sponge-dwelling brittlestar

Henkel¹,

Pawlik²

2011

Aquat. Biol.

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On coral reefs off the Florida Keys (USA), the obligate sponge-dwelling brittlestar Ophiothrix lineata lives almost exclusively in the tube sponge Callyspongia vaginalis. We examined chemotactic recognition by O. lineata to assess sponge host preferences using a Y-tube assay chamber. O. lineata preferentially selected seawater conditioned by C. vaginalis relative to seawater controls and showed no preference for seawater conditioned by the infrequent host sponge Niphates digitalis or the non-host sponge Aplysina archeri. When offered seawater conditioned by C. vaginalis and N. digitalis, O. lineata preferentially chose C. vaginalis. Field manipulations examined growth of O. lineata confined to live in all 3 sponge species and the impact of habitat size on growth of O. lineata living in C. vaginalis. Growth of O. lineata was significantly greater in longer (12 cm) tubes of C. vaginalis than in shorter (6 cm) tubes, and while O. lineata was able to survive in A. archeri, growth was greater for brittlestars living in C. vaginalis and N. digitalis. Surveys of O. lineata in C. vaginalis revealed that 74.3% of sponges had at least 1 male and female brittlestar, with 37.1% of sponges having a greater proportion of males, which may increase brittlestar fertilization success. Abundance of O. lineata increased with sponge size and did not differ based on the presence of brooded larvae in sponge tissue. The obligate association of O. lineata with C. vaginalis likely evolved as a consequence of some combination of host abundance, enhanced food availability, and greater probability of mating success in the multi-tubed sponge. KEY WORDS: Host specificity · Chemotaxis · Ophiothrix lineata · Callyspongia vaginalis Resale or republication not permitted without written consent of the publisherAquat Biol 12: [37][38][39][40][41][42][43][44][45][46] 2011 pheus is most likely a function of space partitioning based on sponge morphology, competitive interactions between shrimp species, the eusocial behavior of several species, and the direct development and short dispersal distances of larvae (Duffy 1992, 1996b, Macdonald et al. 2006.The pattern of host use observed in alpheid shrimp is probably one of many, considering the abundance and diversity of sponges and their associated fauna (reviewed by Wulff 2006). The sponge-dwelling brittlestar Ophiothrix lineata is a species-specific obligate living in association with the tube sponge Callyspongia vaginalis (Henkel & Pawlik 2005). Although O. lineata has been observed living in association with other sponges at low frequency (Kissling & Taylor 1977, Hendler et al. 1995, Henkel & Pawlik 2005, surveys of sponges in the Florida Keys, USA, recorded O. lineata living in C. vaginalis 99% of the time, despite the presence of similarly shaped tube sponges that could provide refuge (Henkel & Pawlik 2005). The association between O. lineata and C. vaginalis has been described as a cleaning mutualism, with O. lineata deposit-feeding on the surface of the sponge (Hendler 1984). Compari...

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Sponge host characteristics shape the community structure of their shrimp associates

Cited by 38 publications

References 63 publications

Patterns of genome size variation in snapping shrimp

Patterns of genome size variation in snapping shrimp

Insights into the morphology of symbiotic shrimp eyes (Crustacea, Decapoda, Pontoniinae); the effects of habitat demands

Host specialization of an obligate sponge-dwelling brittlestar

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