Influence of physical and chemical factors on settlement and recruitment of the hydroid Tubularia larynx

Nellis, Pierre; Bourget, Edwin

doi:10.3354/meps140123

Cited by 19 publications

(7 citation statements)

References 33 publications

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“…Only preliminary studies have been carried out on the behavior and settlement process of the actinula larva (Pyefinch and Downing, 1949;Berrill, 1952;Hawes, 1958;Orlov and Marfenin. 1994), and a few ecological studies on larval recruitment have been performed (Lemire and Bourget, 1996;Nellis and Bourget, 1996;Walters and Wethey, 1996). Berrill (1952) and Hawes (1958) suggested that the temporary attachment of the actinula was achieved by nematocyst discharge from the aboral tentacle tips.…”

Section: Introductionmentioning

confidence: 99%

Larval Behavioral, Morphological Changes, and Nematocyte Dynamics During Settlement of Actinulae ofTubularia mesembryanthemum,Allman 1871 (Hydrozoa: Tubulariidae)

Yamashita¹,

Kawaii²,

Nakai³

et al. 2003

The Biological Bulletin

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The marine colonial hydroid Tubularia mesembryanthemum produces a morphologically unique dispersive stage, the actinula larva. Detailed observations were made on the behaviors and nematocyte dynamics of actinula larvae during attachment and morphogenesis by employing microscopic and time lapse video techniques. These observations produced four primary results. (1) Actinula larvae demonstrated two forms of attachment: temporary attachment by atrichous isorhiza (AI)-nematocysts discharged from the aboral tentacle (AT) tips-and permanent settlement by cement secretion from the columnar gland cells of the basal protrusion. (2) During larval settlement, numerous AIs were discharged from the AT tips with sinuous movement and rubbing of the tentacles onto the substrata, leading to "nematocyte-printing" around the settlement site. (3) Simultaneous with the discharge of the AIs, migration of stenoteles, desmonemes, and microbasic mastigophores occurred, resulting in a dramatic change of nematocyte composition in the ATs after larval settlement. This was in parallel with changes in larval behavior and the tentacle function. (4) Nematocyte-printing behavior during settlement could be recognized as metamorphic behavior responsible for irreversible changes in AT function, from attachment to feeding and defense.

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Section: Introductionmentioning

confidence: 99%

Larval Behavioral, Morphological Changes, and Nematocyte Dynamics During Settlement of Actinulae ofTubularia mesembryanthemum,Allman 1871 (Hydrozoa: Tubulariidae)

Yamashita¹,

Kawaii²,

Nakai³

et al. 2003

The Biological Bulletin

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“…After release, larvae are non-feeding and swim for a few hours (Woollacott & Zimmer 1971). In still water, when the swimming phase is complete, larvae become photonegative and geopositive and begin to explore surfaces (Lynch 1947, Nellis & Bourget 1996. Individuals swim in counter-clockwise circles of decreasing circumference over the surface, 'testing' the substrate with bundles of cilia (Woollacott & Zimmer 1971).…”

Section: Introductionmentioning

confidence: 99%

Endoscopic observations of invertebrate larval substratum exploration and settlement

Walters¹,

Miron²,

Bourget³

1999

Mar. Ecol. Prog. Ser.

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In the marine environment, competent larvae of sessile invertebrates are influenced by water flow and a variety of biological, chemical and physical cues. Most research has focused on how these biotic and abiotic factors influence where individual larvae ultimately settle. Much less is known about post-contact exploration prior to metamorphosis. This is, in part, due to limitations associated with directly observing small larvae (100 to 500 urn) in flowing seawater. A study was conducted in Beaufort, North Carolina, USA to understand how larvae of the barnacle Balanus amphitrite and the bryozoan Bugula neritina respond to a variety of flow rates (0, 1.3, 6.1 and 8.3 cm s ' ) and surface types (clean, biofilmed, 1 and 2 wk fouled). Larval behavior was studied by means of endoscopy in a runningseawater chamber. Larval movements were observed at 30 frames s ' for individuals that remained in contact with surfaces from <1.0 s to 44.5 min. Both flow rate and surface type significantly influenced the behavior of the species examined, although larvae of B. amphitrite and B. neritina often responded very differently to the same treatment conditions. Larvae of B. amphitrite explored more surface area (fractal dimensions) in moving water than m still water, but flow did not influence the direction of travel. Mean exploration rate of B. amphitrite did not vary among treatments and ranged from 0.16 to 0.21 mm s" More cyprid larvae explored surfaces with macrofouling and spent significantly longer times on these surfaces than on clean ones. In still water, larvae of B. neritina repeatedly contacted, explored and swam away from the test surfaces. In contrast, in flow, larvae of B. neritina never swam away from any surface after contact was made. Individuals of B. neritina crawled directly upstream on clean and biofilmed surfaces at all flow rates unless individuals encountered filamentous structures (biofilmed surfaces only). When this happened, larvae of B. neritina frequently remained attached to filaments as the filaments moved with the flow. These larvae were then either dislodged or immediately resumed crawling upstream upon contact with the plate surface. A limited number of larvae of both species settled during our observations (15% B. amphitrite, 18% B. neritina). Settlement of B. amphitrite was not correlated with flow rate or surface type; larvae of B. nerltina settled only on 2 wk fouled surfaces.

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“…The observed increase in colonies during spring could be the result of re‐growth, self recruitment or settlement of recruits from northern sources. Moreover, actinulae settlement is known to be enhanced by higher temperatures (Nellis & Bourget ).…”

Section: Discussionmentioning

confidence: 99%

Seasonal patterns in the abundance of Ectopleura crocea (Cnidaria: Hydrozoa) on a shipwreck in the Northern Adriatic

Camillo

Giordano

et al. 2013

Marine Ecology

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Ectopleura crocea is an Anthomedusan hydroid, frequently recorded and abundant on artificial substrates. Here we examine whether the abundance of this species varies seasonally on a shipwreck in the Northern Adriatic at a depth of 10–12 m. Individuals were first found in late autumn when temperatures had dropped below 15 °C, forming scattered colonies composed of a few, small hydranths bearing immature gonophores. Substratum cover and density increased throughout late winter and spring, reaching a peak in April. At temperatures of about 19 °C, colonies were no longer present in June and remained absent throughout the summer. The polyp gut contents comprised mostly crustaceans.

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Influence of physical and chemical factors on settlement and recruitment of the hydroid Tubularia larynx

Cited by 19 publications

References 33 publications

Larval Behavioral, Morphological Changes, and Nematocyte Dynamics During Settlement of Actinulae ofTubularia mesembryanthemum,Allman 1871 (Hydrozoa: Tubulariidae)

Larval Behavioral, Morphological Changes, and Nematocyte Dynamics During Settlement of Actinulae ofTubularia mesembryanthemum,Allman 1871 (Hydrozoa: Tubulariidae)

Endoscopic observations of invertebrate larval substratum exploration and settlement

Seasonal patterns in the abundance of Ectopleura crocea (Cnidaria: Hydrozoa) on a shipwreck in the Northern Adriatic

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