Regional morphology and mucus composition in the urogenital papilla skin of the blackbelly rosefish Helicolenus dactylopterus (Delaroche, 1809)

2018 ◽  
Vol 189 ◽  
pp. 119-127 ◽  
Author(s):  
Gianluca Accogli ◽  
Letizia Sion ◽  
Porzia Maiorano ◽  
Francesca Capezzuto ◽  
Gianfranco D’Onghia ◽  
...  
Keyword(s):  
Helicolenus Dactylopterus ◽  
Urogenital Papilla

Annual reproductive cycle of Helicolenus dactylopterus dactylopterus (Teleostei: Scorpaeniformes) with special reference to the ovaries sperm storage

1999 ◽  
Vol 79 (3) ◽  
pp. 521-529 ◽  
Author(s):  
M. Muñoz ◽  
M. Casadevall ◽  
S. Bonet
Keyword(s):  
Optical Microscope ◽  
Sperm Production ◽  
Annual Reproductive Cycle ◽  
Ovarian Fluid ◽  
Histological Changes ◽  
Ovarian Wall ◽  
Helicolenus Dactylopterus ◽  
Specialized Structure ◽  
Microscopic Morphology ◽  
Urogenital Papilla

In this paper the macroscopic and microscopic morphology of the gonads of Helicolenus dactylopterus dactylopterus (Pisces: Teleostei) were analysed as well as its seasonal histological changes. The testicles are of the lobular type. The cystovarian ovaries have a central rachis from which the ovigerous lamellae are radially suspended. The gonoducts remain independent until they join together at the urogenital papilla which, in males, can be projected towards the exterior serving as a copulating organ. Sperm production is important from July to February. In contrast, the females only have mature and vitellogenic oocytes in winter, from December to February. In the west Mediterranean spawning takes place during the months of January and February. The ovaries contain clusters of spermatozoa for some ten months, from May onwards. By means of an optical microscope a specialized structure is detected, situated at the base of the interlamellar space, where male sexual cells are stored for a long period of time. Nevertheless, for several months many individual spermatozoa are also detected in the interlamellar areas, floating in the ovarian fluid secreted by the epithelium of the ovarian wall. It is still unknown whether the species under study is oviparous or viviparous, as until now, no intraovarian embryos have been detected in any of the specimens analysed.

Life history parameters as possible discriminators of bluemouth Helicolenus dactylopterus (Delaroche, 1809) populations in Portuguese waters

2012 ◽  
Vol 125-126 ◽  
pp. 69-76 ◽  
Author(s):  
Vera Sequeira ◽  
Ana Neves ◽  
Rafaela Barros Paiva ◽  
João Pereira de Lima ◽  
Ana Rita Vieira ◽  
...  
Keyword(s):  
Life History ◽  
Life History Parameters ◽  
Helicolenus Dactylopterus

Callogobius winterbottomi, a new species of goby (Teleostei: Gobiidae) from the Western Indian Ocean

Zootaxa ◽  
2013 ◽  
Vol 3630 (1) ◽  
pp. 155-164 ◽  
Author(s):  
NAOMI R. DELVENTHAL ◽  
RANDALL D. MOOI
Keyword(s):  
South Africa ◽  
New Species ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Caudal Peduncle ◽  
Additional Specimen ◽  
Group A ◽  
Urogenital Papilla ◽  
A New Species

Callogobius winterbottomi new species is described from the 33.8 mm SL holotype and two paratypes (32.2 mm SL and 22.9 mm SL) from the Comoros, Western Indian Ocean. It is distinguished from all other known Callogobius species by the following combination of characters: sensory pores absent, 23–26 scales in lateral series, and sensory papillae pre-opercular row not continuous with transverse opercular row. One additional specimen of Callogobius winterbottomi was located from South Africa. A new standardized naming system for Callogobius sensory papillae rows is presented for identification and clarification of character states among Callogobius species. The new species is tentatively placed among what we term the “sclateri group”, a clade including C. sclateri (Steindachner) and three other species that exhibit a modified female urogenital papilla with lateral distal flaps and elongate ctenii on the caudal peduncle scales. Callogobius tutuilae (Jordan & Seale) is removed from synonymy with C. sclateri because it has partially united pelvic fins (vs separate) and the preopercular sensory papillae row is continuous with the transverse opercular row (vs separate).

scholarly journals Distribution and population structure of the rockfish Helicolenus dactylopterus (Pisces: Scorpaenidae) in the western Mediterranean

2001 ◽  
Vol 81 (1) ◽  
pp. 129-141 ◽  
Author(s):  
Enric Massutí ◽  
Joan Moranta ◽  
L. Gil de Sola ◽  
B. Morales-Nin ◽  
Llucia Prats
Keyword(s):  
Population Structure ◽  
Juvenile Fish ◽  
Western Mediterranean ◽  
Small Fish ◽  
Depth Range ◽  
Southern Area ◽  
Northern Areas ◽  
Helicolenus Dactylopterus ◽  
Spatio Temporal ◽  
And Cluster Analysis

The distribution and spatio–temporal variation of Helicolenus dactylopterus (Pisces: Scorpaenidae) population was studied from 816 bottom trawls developed along the Iberian coast. Multifactor analysis of variance was used to test the differences in abundance and biomass and cluster analysis was applied to detect differences in population structure. The results showed a bathymetric and latitudinal gradient in abundance and population structure along three geographic sectors in the surveyed area. In the southern area, the species was more frequent and showed a wider bathymetric distribution range than northwards. The depth range with the maximum frequency of occurrence was also wider in the southern area than northwards. Similar trends were observed in terms of abundance and biomass, with the highest and lowest indices in the southern and northern areas, respectively. The age composition of the catches showed that the population consisted mainly of young-of-the-year and juvenile fish. This fraction of the population is well represented, at a mesoscale, along the whole surveyed area, but adults are well represented only at a local scale, at the deepest strata surveyed in the southern area. In this case, recruits of age 0 and juveniles up to 4-y old were restricted to depths shallower than 500 m, while adult fish older than 6 y of age appeared below this depth. In the southern area, seasonal changes in the population structure were also observed, with modes of small fish (3–6 cm) from March to June, as a consequence of the species recruitment to the bottom. Some direct and indirect factors of biogeographic, environmental and anthropogenic origin affecting the observed gradient are discussed.

Studies on Environmental Effects of Underwater Chemical Munitions in the Southern Adriatic Sea (Mediterranean Sea)

2012 ◽  
Vol 46 (3) ◽  
pp. 10-20 ◽  
Author(s):  
Luigi Alcaro ◽  
Camilla Della Torre ◽  
Tommaso Petochi ◽  
Valerio Sammarini ◽  
Marco Matiddi ◽  
...  
Keyword(s):  
Reference Site ◽  
Adriatic Sea ◽  
Sulfur Mustard ◽  
Health Assessment ◽  
Chemical Warfare Agents ◽  
The Body ◽  
Assessment Index ◽  
Skin Ulcers ◽  
Warfare Agents ◽  
Helicolenus Dactylopterus

AbstractThe present paper shows the multidisciplinary approach used to assess the ecotoxicity of chemical munitions lying on the seabed in the Southern Adriatic Sea where aerial bombs charged with mustard agent and organoarsenic chemical warfare agents (CWAs) have been dumped.Sampling activities and laboratory analyses have been carried out on two sentinel species, the blackbelly rosefish, Helicolenus dactylopterus, and the European conger, Conger conger, collected in a CWA dumping site 35 nm from the coast of Apulia, Italy, and from a reference site. Fish were analyzed through an ecotoxicological approach, integrating chemical analysis and biological responses.Degradation products of the blister agents bis-(2-chloroethyl)sulphide, commonly known as mustard agent or yperite (also called sulfur or sulfur mustard), were found in sediment samples collected nearby aerial bombs. Although no evidence of these compounds was detected in tissues of either fish, levels of heavy metals (arsenic and mercury), potentially released by rusted chemical weapons, were significantly higher in sediment and fish from the CWA site compared to the reference site. Severe external and internal lesions were observed in fish captured in the CWA site, with congers displaying small to large skin ulcers along the body. Health assessment index (HAI) values, as well as spleen melano-macrophages centres and CYP1A ethoxyresorufin-O-deethylase activity were higher in fish from the CWA site, indicating a chronic state of illness and environment degradation.The working procedures and analyses performed during these surveys could be suitable for future biomonitoring studies in other CWA dumping sites.

scholarly journals Zygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus

2017 ◽  
Vol 90 (5) ◽  
pp. 2157-2169 ◽  
Author(s):  
V. Sequeira ◽  
E. Couto ◽  
A. Neves ◽  
A. R. Vieira ◽  
R. B. Paiva ◽  
...  
Keyword(s):  
Steroid Hormone ◽  
Sex Steroid ◽  
Sex Steroid Hormone ◽  
Helicolenus Dactylopterus

The Distribution of Helicolenus dactylopterus in the Gulf of Maine

Copeia ◽  
1966 ◽  
Vol 1966 (4) ◽  
pp. 877
Author(s):  
John A. Musick
Keyword(s):  
Gulf Of Maine ◽  
Helicolenus Dactylopterus
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