scholarly journals Influences of temperature, salinity, and diatom density on frequency of cirral beating of the barnacle Balanus amphitrite Darwin in the field

2005 ◽  
Vol 22 (1) ◽  
pp. 7-11
Author(s):  
Hiroichi Tsukamoto
Keyword(s):  
Balanus Amphitrite ◽  
Diatom Density

Ultrastructural morphology of neurosecretory neurons in the barnacle Balanus amphitrite

1990 ◽  
Vol 48 (3) ◽  
pp. 434-435
Author(s):  
Grazia Tagliafierro ◽  
Cristiana Crosa ◽  
Marco Canepa ◽  
Tiziano Zanin
Keyword(s):  
Nervous System ◽  
Ultrastructural Level ◽  
Uranyl Acetate ◽  
Balanus Amphitrite ◽  
Neurosecretory Neurons ◽  
The Central Nervous System ◽  
Ultrathin Sections ◽  
Dense Core Granules ◽  
The Brain ◽  
Ocellar Nerve

Barnacles are very specialized Crustacea, with strongly reduced head and abdomen. Their nervous system is rather simple: the brain or supra-oesophageal ganglion (SG) is a small bilobed structure and the toracic ganglia are fused into a single ventral mass, the suboesophageal ganglion (VG). Neurosecretion was shown in barnacle nervous system by histochemical methods and numerous putative hormonal substances were extracted and tested. Recently six different types of dense-core granules were visualized in the median ocellar nerve of Balanus hameri and serotonin and FMRF-amide like substances were immunocytochemically detected in the nervous system of Balanus amphitrite. The aim of the present work is to localize and characterize at ultrastructural level, neurosecretory neuron cell bodies in the VG of Balanus amphitrite.Specimens of Balanus amphitrite were collected in the port of Genova. The central nervous system were Karnovsky fixed, osmium postfixed, ethanol dehydrated and Durcupan ACM embedded. Ultrathin sections were stained with uranyl acetate and lead citrate. Ultrastructural observations were made on a Philips M 202 and Zeiss 109 T electron microscopy.

Roles of dopamine and serotonin in larval attachment of the barnacle,Balanus amphitrite

1999 ◽  
Vol 284 (7) ◽  
pp. 746-758 ◽  
Author(s):  
Hisashi Yamamoto ◽  
Katsuhiko Shimizu ◽  
Akiko Tachibana ◽  
Nobuhiro Fusetani
Keyword(s):  
Balanus Amphitrite ◽  
Larval Attachment

Recruitment of the barnacle Balanus amphitrite in a tropical estuary: implications of environmental perturbation, reproduction and larval ecology

2005 ◽  
Vol 85 (4) ◽  
pp. 909-920 ◽  
Author(s):  
Dattesh V. Desai ◽  
A.C. Anil
Keyword(s):  
Temporal Variations ◽  
Larval Abundance ◽  
Balanus Amphitrite ◽  
Larval Ecology ◽  
The West ◽  
Environmental Perturbation ◽  
Recruitment Failure ◽  
Acorn Barnacle ◽  
New Recruits ◽  
Impulsive Release

Phytoplankton blooms are known to influence barnacle recruitment and in boreal regions spring blooms work as an important trigger. Close to the west coast of the sub-continent of India, blooms tend to be triggered by breaks in the monsoon and the recurrence of the monsoon after a short break can stress the new recruits. The recruitment of Balanus amphitrite, an acorn barnacle, at Dona Paula Bay at the mouth of Zuari estuary, Goa, India was studied. Observations included variations in recruitment, larval abundance, development and reproduction. Adult conditioning and inter-brood variations were important factors in the larval ecology of this organism. The results indicate that the impulsive release of larvae during breaks between monsoons could be a short-sighted luxury for Balanus amphitrite in these waters. Temporal variations or recruitment failure in such environments can be attributed to inappropriate cue synchronization.

Diatoms on the cirri of tropical barnacles

2000 ◽  
Vol 80 (4) ◽  
pp. 737-738 ◽  
Author(s):  
P.R. Bigelow ◽  
C.G. Alexander
Keyword(s):  
Benthic Diatoms ◽  
Rocky Shores ◽  
Balanus Amphitrite ◽  
Northern Australia ◽  
Feeding Efficiency ◽  
The Family

Two species of large extension feeding barnacles are abundant on exposed tropical rocky shores of northern Australia. The cirri of many specimens carry varying numbers of a commensal diatom in some cases with as many as 2000 individuals on a single cirrus. The araphid diatom resembles the genus, Lichmophora within the family Fragilariaceae although no description has yet been published. Species of Lichmophora are common benthic diatoms in these waters as an epiphyte on macroalgae and common primary fouling diatoms on test panels. The diatom reported here has not been found on any substratum other than the barnacles Tetraclita squamosa and Australobalanus imperator, very rarely on Balanus amphitrite. Analysis of the diatom distribution on the cirri shows significantly higher numbers on the posterior captorial cirri. The effect of commensal diatoms on the feeding efficiency of the barnacles is discussed.

Characterisation of the bacteria associated with barnacle, Balanus amphitrite, shell and their role in gregarious settlement of cypris larvae

2012 ◽  
Vol 413 ◽  
pp. 7-12 ◽  
Author(s):  
T. Bacchetti De Gregoris ◽  
L. Khandeparker ◽  
A.C. Anil ◽  
E. Mesbahi ◽  
J.G. Burgess ◽  
...  
Keyword(s):  
Balanus Amphitrite
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