REPRODUCTION AND DEVELOPMENT OF<i>HALICHONDRIA</i>SP. IN THE MYSTIC ESTUARY, CONNECTICUT

Fell, Paul E.; Jacob, William F.

doi:10.2307/1541003

Cited by 37 publications

(36 citation statements)

References 18 publications

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“…The production of oocytes by males may be due to a proportion of the green Haliclona population being hermaphroditic, while other individuals within the population have a gonochoric habit. This has been reported previously (Lewandrowski & Fell 1981, Simpson 1984, Wapstra & van Soest 1987, as has the alternation between a mostly gonochoric and a mostly hermaphroditic population (Fell & Jacob 1979, Simpson 1984. However, the oocytes found in green Haliclona sponges that also produced spermatic cysts were never observed to develop into embryos, unlike hermaphroditic individuals of Halichondria sp.…”

Section: Reproductive Development and Sexualitysupporting

confidence: 83%

“…However, the oocytes found in green Haliclona sponges that also produced spermatic cysts were never observed to develop into embryos, unlike hermaphroditic individuals of Halichondria sp. that did produce embryos (Fell & Jacob 1979). The 'abortive' oocytes observed in this study were significantly smaller than those produced by females, and it seems more probable that environmental factors may be influencing the physiology of those individuals.…”

Section: Reproductive Development and Sexualitymentioning

confidence: 46%

“…Oocyte development in males was also found in Elvin's (1976) study on the effect of temperature on Haliclona permollis, where oocytes in males and the presence of hermaphroditic individuals occurred after a period of cooling. It is unclear why only a proportion of males is influenced by this temperature change; possibly, individuals in the population are alternating between gonochorism and hermaphroditism (Fell & Jacob 1979). Manipulative experiments and continued monitoring of the population will confirm or disprove the relationship, but the data suggest that the production of oocytes in green Haliclona males is related to cooling water temperatures.…”

Section: Reproductive Development and Sexualitymentioning

confidence: 99%

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Strategies, patterns and environmental cues for reproduction in two temperate haliclonid sponges

Abdo¹,

Fromont²,

McDonald³

2008

Aquat. Biol.

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The reproductive biology of 2 haliclonid sponges was examined over a 2 yr period. Histological samples of Haliclona sp. 1 (green Haliclona) and Haliclona sp. 2 (brown Haliclona) from tagged and haphazardly sampled individuals of both species were examined using light microscopy. Interest in these 2 sympatric species is high, due to the potent and unique bioactive compound (salicylihalamide A) they produce, hence the need to understand the reproductive biology of both species to ensure their proper conservation and management. Green Haliclona is viviparous, with both gonochoric and hermaphroditic individuals in the sponges sampled. Brown Haliclona is also viviparous and is clearly a gonochoric species. Only decreasing wave height showed a significant correlation to gametogenesis, but the onset and progression of reproduction in both species coincided with increases in water temperature and photoperiod. Oogenesis for both species extended from November to April. Spermatogenesis extended over 3 mo for green Haliclona (January to March) and 4 mo for brown Haliclona (January to April). Embryogenesis within brood chambers started in January and extended over 4 mo in green Haliclona and 5 mo in brown Haliclona. The parenchymellae larvae of green Haliclona were observed in tissue samples for 2 mo compared to 4 mo for brown Haliclona. The reproductive output of each species was similar; however, female reproductive output at 2.9% (green Haliclona) and 2.4% (brown Haliclona) of the mesohyl was much lower than that of other viviparous species. Male reproductive output (2.3 and 2.4% for green and brown Haliclona, respectively) compares favourably to that of oviparous species. The high reproductive output of males and the timing of reproduction in both species of sponge appears to help in reducing the risk of unsuccessful fertilisation and lower the probability of larvae being released into unfavourable conditions. KEY WORDS: Haliclona · Sexual · Fecundity · GametogenesisResale or republication not permitted without written consent of the publisher OPEN PEN ACCESS CCESS

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Section: Reproductive Development and Sexualitysupporting

confidence: 83%

Section: Reproductive Development and Sexualitymentioning

confidence: 46%

Section: Reproductive Development and Sexualitymentioning

confidence: 99%

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Strategies, patterns and environmental cues for reproduction in two temperate haliclonid sponges

Abdo¹,

Fromont²,

McDonald³

2008

Aquat. Biol.

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“…Immediately inside the CE is a sub-epithelial layer of cells that surrounds a large spicule-containing inner cell mass (ICM). At maturity, the posterior pole of the larvae will have longer cilia (∼36 μm in length compared to ∼12 μm around the rest of the surface (see Fell and Jacob 1979)). Since all five Halichondria T-box genes were expressed in 0-24 h freeswimming larvae, we chose this stage for initial analysis.…”

Section: Distinct Larval Expression Profiles Of Poriferan T-box Genesmentioning

confidence: 99%

Expansion, diversification, and expression of T-box family genes in Porifera

et al. 2010

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Sponges are among the earliest diverging lineage within the metazoan phyla. Although their adult morphology is distinctive, at several stages of development, they possess characteristics found in more complex animals. The T-box family of transcription factors is an evolutionarily ancient gene family known to be involved in the development of structures derived from all germ layers in the bilaterian animals. There is an incomplete understanding of the role that T-box transcription factors play in normal sponge development or whether developmental pathways using the T-box family share similarities between parazoan and eumetazoan animals. To address these questions, we present data that identify several important T-box genes in marine and freshwater sponges, place these genes in a phylogenetic context, and reveal patterns in how these genes are expressed in developing sponges. Phylogenetic analyses demonstrate that sponges have members of at least two of the five T-box subfamilies (Brachyury and Tbx2/3/4/5) and that the T-box genes expanded and diverged in the poriferan lineage. Our analysis of signature residues in the sponge T-box genes calls into question whether "true" Brachyury genes are found in the Porifera. Expression for a subset of the T-box genes was elucidated in larvae from the marine demosponge, Halichondria bowerbanki. Our results show that sponges regulate the timing and specificity of gene expression for T-box orthologs across larval developmental stages. In situ hybridization reveals distinct, yet sometimes overlapping expression of particular T-box genes in free-swimming larvae. Our results provide a comparative framework from which we can gain insights into the evolution of developmentally important pathways.

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“…In addition, such specimens may grow rapidly so that within a short period of time their sizes may overlap those of older sponges. Partly for these reasons, there have been few studies of sponge populations in which an attempt has been made to distinguish between these two types of specimens [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

SEQUENTIAL REPRODUCTION BY DIFFERENT TYPES OF SPECIMENS OF THE ESTUARINE SPONGE,HALICHONDRIASP., WITH AN EMPHASIS ON REPRODUCTION OF POSTLARVAL SPECIMENS

Lewandrowski

Fell

1981

International Journal of Invertebrate Reproduction

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REPRODUCTION AND DEVELOPMENT OFHALICHONDRIASP. IN THE MYSTIC ESTUARY, CONNECTICUT

Cited by 37 publications

References 18 publications

Strategies, patterns and environmental cues for reproduction in two temperate haliclonid sponges

Strategies, patterns and environmental cues for reproduction in two temperate haliclonid sponges

Expansion, diversification, and expression of T-box family genes in Porifera

SEQUENTIAL REPRODUCTION BY DIFFERENT TYPES OF SPECIMENS OF THE ESTUARINE SPONGE,HALICHONDRIASP., WITH AN EMPHASIS ON REPRODUCTION OF POSTLARVAL SPECIMENS

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