A histological study of reproduction in the serpulids Pomatoceros triqueter and Pomatoceros lamarckii (Annelida: Polychaeta)

Cotter, Elizabeth; O’Riordan, Ruth M.; Myers, Alan A.

doi:10.1007/s00227-002-0987-2

Cited by 19 publications

(39 citation statements)

References 10 publications

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“…triqueter has been reported to show great seasonal and inter‐annual variability in recruitment (Castric‐Fey ; Cotter et al . ,b).…”

Section: Discussionmentioning

confidence: 99%

Succession patterns of polychaetes on algal‐dominated rocky cliffs (Aegean Sea, Eastern Mediterranean)

Antoniadou

2013

Marine Ecology

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Ecological succession has been scarcely investigated on sublittoral rocky cliffs. The few relevant studies deal with the structure of the developing community and are limited to higher taxa or sessile forms. The objective of the present study was to examine succession patterns on algal-dominated rocky cliffs both at the structural (species composition) and functional (feeding guild composition) level, using Polychaeta, a dominant taxon in this marine habitat, as a reference group. Cement panels were seasonally installed on the rocky substratum (25-30 m depth) and sampled every 3 months over a 1-year period. Twentynine polychaete species were recorded, previously reported from the surrounding benthic community, and classified into eight feeding guilds. Most species were assigned as sessile filter-feeders; this guild dominated in abundance and biomass. A strong effect of the length of immersion and of the seasonal onset of succession on the developed communities was assessed: species composition analyses suggested convergence into a similar organization as succession proceeds, whereas the impact of starting season on succession was stronger when analysing feeding guilds. In both cases succession was faster on panels installed in winter. The main emerging patterns were in agreement with relevant surveys of the entire benthic fauna, thus supporting the efficacy of polychaetes as a surrogate group for studying ecological succession in the benthic marine environment.

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“…triqueter has been reported to show great seasonal and inter‐annual variability in recruitment (Castric‐Fey ; Cotter et al . ,b).…”

Section: Discussionmentioning

confidence: 99%

Succession patterns of polychaetes on algal‐dominated rocky cliffs (Aegean Sea, Eastern Mediterranean)

Antoniadou

2013

Marine Ecology

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“…S . triqueter has a very long reproductive period, with unpredictable peaks, more frequent from late summer to autumn [ 57 , 58 ]. Moreover, S .…”

Section: Discussionmentioning

confidence: 99%

Role of Recruitment Processes in Structuring Coralligenous Benthic Assemblages in the Northern Adriatic Continental Shelf

2016

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Coralligenous biogenic reefs are among the most diverse marine habitats in the Mediterranean Sea. The northern Adriatic mesophotic coralligenous outcrops host very rich and diverse epibenthic assemblages. Several studies quantified the low temporal variability and high spatial heterogeneity of these habitats, while processes driving structuring and differentiation are still poorly understood. To shed light on these processes, temporal and spatial patterns of colonisation were investigated using travertine tiles deployed on three coralligenous outcrops, corresponding to the main typologies of benthic assemblages described in previous studies. Three years after deployment, assemblages colonising travertine tiles resembled the differentiation among sites revealed by the natural assemblages in terms of major ecological groups. Processes structuring and maintaining species diversity have been explored. Pioneer species with high reproduction rate, long distance larval dispersal and fast growth (e.g. the serpulid polychaete Spirobranchus triqueter and the bivalve Anomia ephippium), were the most abundant in the early stages of recruitment on the two outcrops further away from the coast and with lower sedimentation. Their success may vary according to larval availability and environmental conditions (e.g., sedimentation rates). At these sites early-stage lasted 10–12 months, during which even species from natural substrates began colonising tiles by settlement of planktonic propagules (e.g., encrusting calcareous Rhodophyta) and lateral encroachment (e.g., sponges and ascidians). On coastal outcrop, exposed to a higher sedimentation rates, tiles were colonised by fast-growing algal turfs. Resilience of northern Adriatic coralligenous assemblages, and maintenance of their diversity, appeared largely entrusted to asexual reproduction. Exploring the mechanisms that underlie the formation and maintenance of the species diversity is crucial to improve our understanding of ecological processes and to implement appropriate conservation strategies of the Adriatic coralligenous reefs.

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“…By contrast, a large number of polychaetes possess simple testes surrounded by a thin layer of sheath/peritoneal cells or a simple layer of germinal epithelium, such as Amathys lutzi [24], Marenzelleria viridis [25], Parergodrilus heideri [26], Phragmatopoma lapidosa [27], Pomatoceros triqueter and Pomatoceros lamarckii [28], Polydora spp. and Steblospio benedicti [29] and Stygocapitella subterranea [30].…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, they have been neglected or mistakenly recognised as sperm flagella in some polychaetes, as the histological sections presented in association with these studies do demonstrate the existence of ciliary structures (e.g. Pomatoceros lamarckii [28] and Serpula vermicularis [44]).…”

Section: Discussionmentioning

confidence: 99%

Detailed analysis of the male reproductive system in a potential bio-indicator species – The marine invertebrate Galeolaria caespitosa (Polychaeta: Serpulidae)

Aitken

Lin

2017

PLoS ONE

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For the first time, this study has systemically investigated the male reproductive system in a sessile broadcast-spawning marine invertebrate, Galeolaria caespitosa (Polychaeta: Serpulidae), which has significant potential as a bio-indicator species of coastal marine pollution. The abdomen of G. caespitosa was divided by intersegmental septa into over 80 trunk segments. Each segment served as a germinal chamber with a C-shaped gonadal arrangement consisting of several distinct compartments: a seminiferous epithelium (SE) compartment located in the centre of the chamber, with each of its two ends connecting to a nurse cell (NC) compartment and then an efferent duct (ED) compartment. The SE compartment contained a multilayered seminiferous epithelium where spermatogenesis was initiated. Spermatids were released in pairs into the lumen of the SE compartment and then transported to the NC compartment where they underwent spermiogenesis with the support of secretory vesicles released by the nurse cells. Spermatozoa were stored in the ED compartment and subsequently released into the seawater through the vas deferens. Unlike vertebrates where germ cells differentiated in close proximity to the nurse cell population (i.e. Sertoli cells), the spermatogenic cells of G. caespitosa exhibited no direct contact with supporting cells at any spermatogenic stage. This finding suggested that the spermatogenesis in G. caespitosa was more dependent on intrinsic developmental programming than most species. Notwithstanding such differences, there were clear parallels between the male reproductive system of G. caespitosa and mammals, in terms of the structure and function. The independence of spermatogenic cells from supporting cells in G. caespitosa raised the possibility of inducing spermiogenesis in vitro, which would provide a useful tool to dissect the mechanisms underlying this complex cell differentiation process in invertebrates and other higher order animals.

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A histological study of reproduction in the serpulids Pomatoceros triqueter and Pomatoceros lamarckii (Annelida: Polychaeta)

Cited by 19 publications

References 10 publications

Succession patterns of polychaetes on algal‐dominated rocky cliffs (Aegean Sea, Eastern Mediterranean)

Succession patterns of polychaetes on algal‐dominated rocky cliffs (Aegean Sea, Eastern Mediterranean)

Role of Recruitment Processes in Structuring Coralligenous Benthic Assemblages in the Northern Adriatic Continental Shelf

Detailed analysis of the male reproductive system in a potential bio-indicator species – The marine invertebrate Galeolaria caespitosa (Polychaeta: Serpulidae)

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