The biology of Atrispinum labracis n. comb. (Monogenea) on the gills of the bass, Dicentrarchus labrax

Atrispinum labracis (Van Beneden & Hesse) n.comb. syn. Microcotyle labracis Van Beneden & Hesse, 1863, parasitizes the bass Dicentrarchus labrax but almost only in the open sea; the very low prevalence of parasites on juvenile estuarine hosts was not due to intolerance of lower salinities in this habitat. The intensity of infection on open-sea bass was rarely more than 2 per fish but the strict localization of the habitat to the outer hemibranch of the ventral end of the first gill arch is thought to enhance the mating opportunities. The parasite attaches itself asymmetrically to the gill by a permanent morphological inclination of the body with respect to the haptor which is itself symmetrically aligned on a single primary lamella.Substantial differences between the copulatory apparatus of A. labracis and that of Microcotyle donavini Van Beneden & Hesse, 1863, the type of Microcotyle, have made necessary the transfer of the parasite from Dicentrarchus labrax to Atrispinum Maillard & Noisy, 1979 and a consequent amendment to the diagnosis of the subfamily Atriasterinae Maillard & Noisy, 1979.

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Blood parasites in noddies and boobies from Brazilian offshore islands – differences between species and influence of nesting habitat

Parasitology ◽

10.1017/s0031182013001649 ◽

2013 ◽

Vol 141 (3) ◽

pp. 399-410 ◽

Cited By ~ 15

Author(s):

PETRA QUILLFELDT ◽

JAVIER MARTÍNEZ ◽

LEANDRO BUGONI ◽

PATRÍCIA L. MANCINI ◽

SANTIAGO MERINO

Keyword(s):

Life History ◽

Body Condition ◽

The Body ◽

Blood Parasites ◽

Molecular Screening ◽

Intensity Of Infection ◽

Blood Smears ◽

Sula Leucogaster ◽

Low Prevalence ◽

Ground Nesting

SUMMARYSeabirds are often free from blood parasites, and a recent review suggested that phylogenetic, ecological and life-history parameters can determine the prevalence of blood parasites in seabirds. However, there is a lack of data available from many seabird groups, and a larger database is needed to understand prevalence patterns of blood parasites. We used a molecular screening approach to detect parasites of the genera Plasmodium, Haemoproteus, Leucocytozoon and Babesia in five species of two genera of seabirds that breed on Atlantic Ocean islands off Brazil. The observed patterns differed between the two bird genera. Like other Laridae, brown noddy, Anous stolidus adults were infected with Haemoproteus with low prevalence. Masked boobies, Sula dactylatra and brown boobies, Sula leucogaster were infected with Babesia. Of the latter, mainly juveniles were infected. In all species, intensity of infection (i.e. number of infected erythrocytes) was so low that parasites remained undetected in blood smears. This may explain the absence of major effects on the body condition of birds, although infected juvenile masked boobies were lighter than juveniles that were not infected with Babesia. Two tree-nesting species; black noddy, Anous minutus and red-footed booby, Sula sula did not have blood parasites, suggesting that tree-nesting may reduce the exposure to arthropod vectors compared with ground nesting in these species.

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Recovery of Haemal Lordosis in European Sea Bass Dicentrarchus labrax (Linnaeus 1758)

10.20944/preprints202111.0352.v1 ◽

2021 ◽

Author(s):

Stephanos Fragkoulis ◽

Chara Kourkouta ◽

George Geladakis ◽

Alice Printzi ◽

Alexis Glaropoulos ◽

...

Keyword(s):

Vertebral Column ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

The Body ◽

External Morphology ◽

Canonical Variate ◽

Morphological Examination ◽

Juvenile Period ◽

European Sea Bass ◽

Growing Period

The lordosis of the haemal part of the vertebral column is a frequent abnormality in reared fish. Haemal lordosis develops during the late larval and early juvenile period, mainly due to the high swimming activity of the fish in the rearing tanks. In the present study we examined whether haemal lordosis recovers during the growth of European sea bass. Furthermore, we aimed to develop simple morphometric indices (PrAn1 and PrAn2) that could link the severity of lordosis at the juvenile stage with fish morphological quality at harvesting. At 111 days post-hatching (dph, 53±4 mm standard length, SL), 600 seabass juveniles with lordotic (L, 200 fish) or normal (N, 400 fish) external morphology were selected and introduced in a common tank. At 150 dph (75±7 mm SL), 350 fish were randomly selected, pit-tagged and transferred in a sea cage for on-growing up to 502 dph (234±16 mm SL). The morphological examination of the fish at 150 and 502 dph revealed that the 60% (46 out of 77) of L juveniles turned into normal phenotype by the end of on-growing period. Interestingly, 56% of the fish with recovered external morphology (N-Rec) presented either a completely normal vertebral column (31%) or minor abnormalities of individual vertebrae (25%). Following the results of geometric morphometric analysis, the differences in the body shape between N-Rec and N fish were not significant (p&gt;0.05, canonical variate analysis). The examined morphometric indices were effective in discriminating the normal fish from the 58% (PrAn1) to 65% (PrAn2) of lordotic juveniles. Results are discussed with respect to the mechanism of lordosis recovery, as well as to their application for the quality control and cull out of the abnormal fish in the commercial hatcheries.

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Effect of Long-term Oral Administration of an Immunostimulant Diet on Innate Immunity in Sea Bass (Dicentrarchus labrax)

Journal of Veterinary Medicine Series B ◽

10.1046/j.1439-0450.2000.00412.x ◽

2000 ◽

Vol 47 (10) ◽

pp. 745-751 ◽

Cited By ~ 43

Author(s):

M. Bagni ◽

L. Archetti ◽

M. Amadori ◽

G. Marino

Keyword(s):

Innate Immunity ◽

Oral Administration ◽

Dicentrarchus Labrax ◽

Sea Bass

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MARINE VIBRIOS ASSOCIATED WITH DISEASED SEA BASS (Dicentrarchus labrax) IN TURKEY

Journal of FisheriesSciences com ◽

10.3153/jfscom.2008007 ◽

2008 ◽

Cited By ~ 5

Author(s):

Jale Korun

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

Marine Vibrios

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Studies on Prevailing Parasitic Fish Diseases in Pre-mature Cultured Sea bass, Dicentrarchus labrax, Sea bream and Mugil cephalus at Ismailia, Province with Special References to Control

International Journal of Veterinary Science ◽

10.37422/ijvs/20.075 ◽

2020 ◽

Keyword(s):

Parasitic Infection ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Mugil Cephalus ◽

Sea Bream ◽

Fish Diseases ◽

Total Prevalence ◽

Dark Colour ◽

Gill Filaments ◽

Mature Fish

This study concentrated on the assessment of the prevailing parasitic fish diseases in some marine fishes at Ismailia province and how to control the infestation using microalgae. This study was carried out on 1080 pre-mature fish (360 D. labrax (225±25 g) and 360 S aurata (150±25 g) and 360 M. cephalus (125±25 g) collected from similar ponds of studies to be examined at the end of treatment. In addition to that we followed non-treated fish (1080 premature). The infested fish showed dark colour and respiratory signs. Post mortem lesions were a presence of congestion or paleness and destruction of gill filaments. The total prevalence of infestation was the total prevalence of parasitic infection of non-treated fishes was 45.83 %. The highest percentage was in D. labrax 56.94 % followed by S. aurata 47.22%, the lowest percentage in M. cephalus 33.33. The total prevalence of parasitic infection in premature treated with 2 g algae was 28.79%, followed by 3 g algae was 23.60 %, while the lowest percentage with 5 g algae was 20.37 % respectively. The detected species of parasites were protozoal parasites, Amyloodinium ocellatum and Riboscyphidia in additions of marine monogenea, Lamellodiscus diplodicus isolated from D Labrex, Mugil Cephalus and S aurata. The present study concluded that, the use of microalgae instead of fish meal decreased parasitic infestation in marine fish. The histopathological alteration of natural infested examined fishes was also recorded.

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Vaccination of European sea bass Dicentrarchus labrax with avirulent Mycobacterium marinum (iipA::kan mutant)

Fish & Shellfish Immunology ◽

10.1016/j.fsi.2019.04.057 ◽

2019 ◽

Vol 90 ◽

pp. 317-327 ◽

Cited By ~ 1

Author(s):

Shay Ravid-Peretz ◽

Angelo Colorni ◽

Galit Sharon ◽

Michal Ucko

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

Mycobacterium Marinum ◽

European Sea Bass

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Understanding the Interaction Effects between Dietary Lipid Content and Rearing Temperature on Growth Performance, Feed Utilization, and Fat Deposition of Sea Bass (Dicentrarchus labrax)

Animals ◽

10.3390/ani11020392 ◽

2021 ◽

Vol 11 (2) ◽

pp. 392

Author(s):

Lydia Katsika ◽

Mario Huesca Flores ◽

Yannis Kotzamanis ◽

Alicia Estevez ◽

Stavros Chatzifotis

Keyword(s):

Growth Rate ◽

Body Weight ◽

Specific Growth ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Dietary Lipid ◽

Lipid Levels ◽

Final Body Weight ◽

Temperature Regimes ◽

Fish Group

This study was conducted to elucidate the interaction effects of temperature and dietary lipid levels (2 × 2 factorial experiment) on the growth performance, muscle, and liver composition in adult farmed European sea bass (Dicentrarchus labrax). Two groups of fish (190 g; 60 fish per group) were distributed in 12 tanks in triplicates and kept at two different temperature regimes; one starting at 23 °C and then changed to 17 °C for 61 days, and the other starting at 17 °C and then changed to 23 °C for 39 days. Two commercial diets containing both ~44% crude protein but incorporating different dietary lipid levels, 16.5% (D16) and 20.0% (D20) (dry matter (DM)), were fed to the fish to apparent satiation; the type of diet fed to each fish group remained constant throughout the experiment. Final body weight, weight gain, and specific growth rate were significantly higher for the fish group held at 23 °C compared to the fish group at 17 °C (before the temperature changes), while the dietary fat content did not have any profound effect in both groups. Furthermore, the different temperature regimes did not affect muscle or liver composition, but, on the contrary, dietary lipids affected hepatosomatic, perivisceral fat, and visceral indexes. Feed conversion ratio and specific growth rate were not affected by the dietary lipid level. An interaction of temperature and dietary lipid content was observed in daily feed consumption (DFC) and final body weight (FBW).

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