Hybridization in the sea: gametic and developmental constraints on fertilization in sympatric species of Pseudechinus (Echinodermata: Echinoidea)

McClary, Daniel; Sewell, Mary A.

doi:10.1016/s0022-0981(02)00487-2

Cited by 20 publications

(15 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Larvae of a jar were considered to reach a particular stage of development when over 50% were at that stage (McClary & Sewell 2003). The presence of a well-formed rudiment (200 mm) plus some spines on the rudiment was considered as a sign of competency.…”

Section: Larval Studiesmentioning

confidence: 99%

“…Pseudechinus huttoni Benham, 1908 inhabits New Zealand's continental shelf in waters deeper than 30 m, and fjordic habitats in depths as shallow as 9 m (Kirby et al 2006). The species typically lives on coarse-grained sediments (McClary & Sewell 2003), but can also be found attached to rocky substrates in fjords. There is a distinct annual reproductive cycle with mature ova being around 70Á100 mm (McClary & Barker 1998).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relative importance of parental diet versus larval nutrition on development and phenotypic plasticity of Pseudechinus huttoni larvae (Echinodermata: Echinoidea)

Pourbagher

Lamare

Barker

et al. 2010

Marine Biology Research

View full text Add to dashboard Cite

The relative importance of parental and larval diets on development of larvae of the sea urchin Pseudechinus huttoni was examined. Laval parameters measured included the size of body components, development rate, morphological phenotypic plasticity, mortality rate, protein, lipid, carbohydrate and energy contents. We also investigated the influence of parental nutrition on fecundity, egg diameter and the eggs' protein, lipid and carbohydrate content. For a period of one year, adult P. huttoni were fed kelp (Macrocystis pyrifera) ad libitum every second day as a low-quality diet, or kelp ad libitum every day plus cockle (Austrovenus stutchburyi) flesh once a week as a high-quality diet. Adults fed the high-quality diet produced larger eggs and larvae with a slower development rate, longer arms relative to the midline length, and lower protein, lipid and carbohydrate contents. In larvae, higher concentrations of planktonic diet led to larger body components, a faster development rate and shorter arms relative to midline length. This study showed that parental nutrition has an important effect on development rate and morphological phenotypic plasticity in larvae of P. huttoni.

show abstract

Section: Larval Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relative importance of parental diet versus larval nutrition on development and phenotypic plasticity of Pseudechinus huttoni larvae (Echinodermata: Echinoidea)

Pourbagher

Lamare

Barker

et al. 2010

Marine Biology Research

View full text Add to dashboard Cite

show abstract

“…In the Ht Â Pm crosses, hybrid echinoplutei were generated, as in other hybridisation studies. (6,7) The reciprocal fertilisation (Pm Â Ht)…”

Section: Hybridisation Experimentsmentioning

confidence: 99%

Morphological evolution in sea urchin development: hybrids provide insights into the pace of evolution

Byrne

Voltzow

2004

BioEssays

View full text Add to dashboard Cite

Hybridisations between related species with divergent ontogenies can provide insights into the bases for evolutionary change in development. One example of such hybridisations involves sea urchin species that exhibit either standard larval (pluteal) stages or those that develop directly from embryo to adult without an intervening feeding larval stage. In such crosses, pluteal features were found to be restored in fertilisations of the eggs of some direct developing sea urchins (Heliocidaris erythrogramma) with the sperm of closely (Heliocidaris tuberculata) and distantly (Pseudoboletia maculata) related species with feeding larvae. Such results can be argued to support the punctuated equilibrium model-conservation in pluteal regulatory systems and a comparatively rapid switch to direct development in evolution.1,2 Generation of hybrids between distantly related direct developers may, however, indicate evolutionary convergence. The 'rescue' of pluteal features by paternal genomes may require maternal factors from H. erythrogramma because the larva of this species has pluteal features. In contrast, pluteal features were not restored in hybridisations with the eggs of Holopneustes purpurescens, which lacks pluteal features. How much of pluteal development can be lost before it cannot be rescued in such crosses? The answer awaits hybridisations among indirect and direct developing sea urchins differing in developmental phenotype, in parallel with investigations of the genetic programs involved.

show abstract

“…Ecological characteristics such as growth of deeper water invertebrates are not well described but are essential to understanding many aspects of their biology and ecology. In this paper we examine growth in the sea urchin, Pseudechinus huttoni, a continental shelf inhabitant found off the coast of New Zealand, and in shallower waters within the New Zealand fiords (McClary & Sewell 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Six of the 11 species, including P. huttoni, are endemic to New Zealand (McKnight 1969). Pseudechinus huttoni inhabits the New Zealand continental shelf from 30 to 550m (McClary & Sewell 2003) and also occurs in New Zealand's southern fiords where it can be accessed in depths as shallow as 9 m (M. D. Lamare pers. obs.).…”

Section: Introductionmentioning

confidence: 99%

Growth and morphometrics in the New Zealand sea urchinPseudechinus huttoni(Echinoidea: Temnopleuridae)

Kirby¹,

Lamare

Barker³

2006

New Zealand Journal of Marine and Freshwater Research

View full text Add to dashboard Cite

We examined somatic growth in the New Zealand sea urchin, Pseudechinus huttoni. This species normally inhabits the continental shelf, but in the New Zealand fiords can be found at shallower depths. These shallower populations provided an opportunity to quantify growth of these deep water sea urchins using chemical tag recapture techniques. Growth was modelled in three Doubtful Sound populations and varied spatially, with maximum test diameter (TD) and maximum growth rates ranging from 33.8 to 42.7mm TD and 2.9mm yr -1 to 23.9mm yr -1 , respectively. Size-at-age modelling suggests that P. huttoni is c. 5-15mm TD at 1 year, 20-30mm TD at 4 years, and adults approach a maximum size of 30-40 mm TD after 6 to 11 years. Growth in continental shelf populations was inferred from measured growth in the fiord population by comparing population statistics (size structures, mean size), morphometrics, and nutritional status among both habitats. Our results indicate that growth of P. huttoni populations on continental shelves varies spatially (with depth), but is within the range of growth measured in the Doubtful Sound populations. A generalised growth model for P. huttoni based on the three Doubtful Sound populations is described by the Brody-Bertalanffy equation S, = 42.17(1-0.99e (-0.229t) ).

show abstract

Hybridization in the sea: gametic and developmental constraints on fertilization in sympatric species of Pseudechinus (Echinodermata: Echinoidea)

Cited by 20 publications

References 50 publications

Relative importance of parental diet versus larval nutrition on development and phenotypic plasticity of Pseudechinus huttoni larvae (Echinodermata: Echinoidea)

Relative importance of parental diet versus larval nutrition on development and phenotypic plasticity of Pseudechinus huttoni larvae (Echinodermata: Echinoidea)

Morphological evolution in sea urchin development: hybrids provide insights into the pace of evolution

Growth and morphometrics in the New Zealand sea urchinPseudechinus huttoni(Echinoidea: Temnopleuridae)

Contact Info

Product

Resources

About